GE AMX 4+ SERVICE_SM_2173225-100_20 OptimaEMSECGManagementSystem GEHealthcareDeviceConfigurationGuide SoftwareVersion1.0 2069773-005RevisionD

GE Healthcare

Technical
Publications

Direction 2173225−100

Revision 2 0

AMX−4+ Service (Model 2169360, 2236420 &
2275938 Series)

Copyrighte 1996, 1997, 1999, 2000, 2002 and 2004 By General Electric Co.
All Rights Reserved

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

THIS PAGE INTENTIONALLY LEFT BLANK.

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Languages

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IMPORTANT! . . . X-RAY PROTECTION

X-ray equipment if not properly used may cause injury. Accordingly, the instructions herein contained
should be thoroughly read and understood by everyone who will use the equipment before you attempt to
place this equipment in operation. The General Electric Company, Medical Systems Group, will be glad to
assist and cooperate in placing this equipment in use.

Although this apparatus incorporates a high degree of protection against x-radiation other than the useful beam, no
practical design of equipment can provide complete protection. Nor can any practical design compel the operator to
take adequate precautions to prevent the possibility of any persons carelessly exposing themselves or others to
radiation.

It is important that everyone having anything to do with x-radiation be properly trained and fully acquainted with the
recommendations of the National Council on Radiation Protection and Measurements as published in NCRP Reports
available from NCRP Publications, 7910 Woodmont Avenue, Room 1016, Bethesda, Maryland 20814, and of the
International Commission on Radiation Protection, and take adequate steps to protect against injury.

The equipment is sold with the understanding that the General Electric Company, GE Healthcare Group, its agents,
and representatives have no responsibility for injury or damage which may result from improper use of the equipment.

Various protective material and devices are available. It is urged that such materials or devices be used.

CERTIFIED ELECTRICAL CONTRACTOR STATEMENT

All electrical installations that are preliminary to p ositioning o f the e quipment at the s ite prepared f or the equipment shall be
performed by licensed electrical contractors. In addition, electrical feeds into t he P ower D istribution Unit shall b e p erformed
by licensed electrical contractors. Other connections between pieces of electrical equipment, calibrations, and t esting s hall
be performed by qualified GE Healthcare personnel. The products involved (and t he a ccompanying electrical installations)
are highly sophisticated, and special engineering competence is required. In performing all electrical work on these
products, GE will u se i ts own s pecially trained field e ngineers. All o f GE’s e lectrical work on t hese products will comply with
the requirements of the applicable electrical codes.

The purchaser of GE equipment shall only utilize qualified personnel (i.e., GE’s field engineers, personnel of third-party
service com panies with equivalent training, or licensed electricians) to perform elect rical servicing on the equipment.

DAMAGE IN TRANSPORTATION

DAMAGE IN TRANSPORTATION
All packages should be closely examined at time of delivery. If damage is apparent, have notation “Damage in
Shipment” written on all copies of the freight or express bill before delivery is accepted or “signed for” by a General
Electric representative or a hospital receiving agent. Whether noted or concealed, damage MUST be reported to the
carrier immediately upon discovery, or in any event, within 14 days after receipt, and the contents and containers held
for inspection by the carrier. A transportation company will not pay a claim for damage if an inspection is not requested
within this 14−day period.
To file a report:

· Call 1−800−548−3366 and use option 8.

· Fill out a report on http://egems.med.ge.com/edq/home.jsp

· Contact your local service coordinator for more information on this process.

Rev. June 13, 2006

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LITHIUM BATTERY CAUTIONARY STATEMENTS

Danger of explosion if battery is incorrectly replaced. Replace only with
the same or equivalent type recommended by the manufacturer. Discard
used batteries according to the manufacturer’s instructions.

Il y a danger d’explosion s’il y a replacement incorrect de la batterie.
Remplacer uniquement avec une batterie du même type ou d’un type
recommandé par le constructeur. Mettre au rébut les batteries usagées
conformément aux instructions du fab

TECHNICAL MANUAL UPDATES

When operating or servicing GE Healthcare products, please contact your GE representative for the latest revision of
product documentation. Product documentation may also be available on−line at the GE Healthcare support
documentation library.

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REVISION HISTORY

REV DATE REASON FOR CHANGE

A Nov. 6 1996 Initial Draft.

0 Dec. 13, 1996 Initial release.
1 Mar. 7, 1997 Made cable drape illustration changes, brake relay illustration changes; up-

dated battery installation illustrration.

2 June 24, 1997 Modified vertical arm latch switch to new style, added latch wiring diagram in Sec-

tion 9.
3 Aug. 14, 1997 High Impact Inspection.

4 Apr. 12, 1999 Added AMX−4+ Model 2236420 Series.
5 Nov. 8, 2000 Added AMX−4+ Model 2275938 Series.

6 Sept. 10, 2002 Added NOTE to section 4−2 about Loctite and cleaning screw holes.
7 Oct. 21, 2004 Added model 46−270615P3 collimator information to replacement procedures.

8 May 14, 2007 Added text “or equivalent service tool“ to certain service tool references.
9 Feb. 14, 2008 Added Sections in Chapter 5 on installation of warning labels.

10 Mar. 25, 2008 Updated Section 6−6 “Install Batteries”.
11 June 23, 2008 Added battery cable leads note above Section 6−1. Resolves PQR 13148025.

12 21NOV2008 Added note in Section 2.2, following step 1−iii, about ordering filtration cup.
13 05OCT2009 Updated collimator PM procedures to make use of torque tool kit. Resolves

iTrak Reports 13085327 and 13155649.
14 04DEC2009 Added LOTO procedure as Section 1.

15 01JUN2010 Added Collimator Tool Kit (5340328) to the Tools and Materials list on page 2.

Reference GEHC Am Service CAPA #5.

16 20OCT2010 Changed label kit part number from 5268993 to 5407496 in Section 6−6.

Updated Section 6−9 − Top Cover X−ray Warning Label; changed label kit part

number from 5268993 to 5407496 in step 1, added step 3 and related

illustration to install Canadian X−ray warning label.

To comply with Canadian RED Act.

17 13OCT2011 Updated Sections 5−3−1, 5−3−2, 5−3−6, 5−4−7 and 5−6−2 to include steps to

apply Loctite 242 to fastener threads. Refer to TrackWise #4071941.

18 14DEC2011 Added Section 12 regarding safety contactor replacement. Refer to CAPA

3519016.

19 04MAY2012 Updated Sections 5−3, 5−3−1, 5−3−2, 5−3−3 and 5−3−4 to modify

counterweight and safety replacement/adjustment procedures. Refer to CAPA

4798150.

20 04SEP2012 Added new Section 12 − Hand Switch Cleaning & Disinfecting Instructions.

Added new Section 13 − Periodic Maintenance Procedure for Hand Switch.

Refer to CAPA 5970812.

Added text to front material on how to obtain most recent revisions of technical

manuals. Satisfies FDA recommendation.

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LIST OF EFFECTIVE PAGES

PAGE REVISION PAGE REVISION PAGE REVISION

NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER

All 20

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TABLE OF CONTENTS

SECTION 1 − LOCK−OUT TAG−OUT (LOTO) 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 − SERVICING THE COLLIMATOR 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1 Collimator Removal 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Collimator Interface and Port Plates Check 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Collimator Installation 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4 Tape Measure Replacement 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5 Field Lamp Replacement 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6 Light Field Adjustment 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6-1 Adjustment Method 1 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6-2 Adjustment Method 2 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-7 Crosshair Window Adjustment 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-8 Field Light Switch Replacement 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-9 Field Size Pointer Replacement 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10 Front Panel Replacement (Medys collimator) 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-11 Brake Switch Replacement 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 − SERVICING THE X−RAY TUBE 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1 X−Ray Tube Removal 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 X−Ray Tube Installation 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 − SERVICING THE HORIZONTAL ARM 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1 Yoke Assembly Removal 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2 Yoke Assembly Installation 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3 Yoke Mounting Plate Assembly Removal 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4 Yoke Mounting Plate Assembly Installation 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5 Horizontal Arm Assembly Removal 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-6 Horizontal Arm Assembly Installation 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-7 Horizontal Arm Brake and Cable Assembly Removal 28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-8 Horizontal Arm Brake and Cable Assembly Installation 28 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-9 Horizontal Arm Brake Cable Removal 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-10 Horizontal Arm Brake Cable Installation 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-11 Horizontal Arm Brake Removal 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-12 Horizontal Arm Brake Installation 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5 − SERVICING THE VERTICAL COLUMN 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1 Remove Vertical Column Assembly 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2 Install Vertical Column Assembly 33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3 Counterweight Cables 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3-1 Main Cable 35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3-2 Safety Cable 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3-3 Reassemble Unit 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3-4 Vertical Column Cable Tension 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3-5 Remove Follower Cable 38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3-6 Install Follower Cable 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4 Upper Brake, Pulley, and Bearings 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4-1 Disconnect Brake 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4-2 Remove Upper Pulley and Brake 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4-3 Replace Upper Pulley and Bearings 41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4-4 Install Upper Pulley, Bearings and Brake 42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4-5 Connect Brake 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TABLE OF CONTENTS

5-4-6 Remove Upper Pulley, Bearings and Brake (Alternate) 43 . . . . . . . . . . . . . . . . . . . . . .

5-4-7 Install Upper Pulley, Bearings and Brake (Alternate) 43 . . . . . . . . . . . . . . . . . . . . . . . .

5-5 Counterweight 44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5-1 Remove Counterweight 44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5-2 Install Counterweight 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5-3 Counterweight Balancing 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6 Carriage Assembly 46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6-1 Remove Carriage 46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6-2 Install Carriage 46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6-3 Remove Carriage Bearings 47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6-4 Install Carriage Bearings 47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7 Lower Brake Removal 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-8 Lower Bearings and Baseplate Removal 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-9 Lower Brake and Bearings Installation 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-10 Column Base Removal 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-11 Column Base Installation 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-12 Lower Pulley and Bearings Removal 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-13 Lower Pulley and Bearings Installation 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-14 Column Support Assembly Removal 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-15 Column Support Assembly Installation 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6 − SERVICING THE CASSETTE DRAWER, COVERS, HORIZONTAL ARM LATCH AND

HANDSWITCH 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1 Cassette Drawer Removal 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2 Cassette Drawer Installation 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3 Cassette Drawer IEC Finger Pinch Label Installation 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-4 Side Covers Removal 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-5 Side Cover Installation 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-6 Battery Charging Warning Label 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-7 Top Cover Removal 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-8 Top Cover Installation 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-9 Top Cover X−ray Warning Label 56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-10 Remove Latch Assembly and Components (Hall Effect Switch) 56 . . . . . . . . . . . . . . . . . . . . . .

6-11 Install Latch Assembly and Components (Hall Effect Switch) 58 . . . . . . . . . . . . . . . . . . . . . . . .

6-12 Remove And Install Hand Switch Cable 59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-13 Install Hand Switch 59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 7 − SERVICING THE BATTERIES 61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-1 Remove Battery Cover 61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-2 Disconnect Battery Sense Harness (If Required) 62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-3 Disconnect and Remove Batteries 62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-4 Disconnect and Remove Battery Test Terminal Strip 65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-5 Continue Battery Disconnection/Removal 65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-6 Install Panasonic Batteries with Sense Board 2334738−2 65 . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 8 − SERVICING THE BASE ASSEMBLY 76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-1 Front Bumper 76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-1-1 Remove Pads 76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-1-2 Install Pads 77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-1-3 Bumper Switch Removal 77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-1-4 Bumper Switch Installation 77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-1-5 Bumper Bearings Removal 78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xiv

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

TABLE OF CONTENTS

8-1-6 Bumper Bearings Installation 78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2 Raise Unit for Service 79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2-1 Raise Rear Wheels 79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2-2 Lower Rear Wheels 79 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2-3 Raise Front Wheels 80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2-4 Lower Front Wheels 81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-3 Remove Drive Wheels 81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-4 Install Drive Wheels 82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-5 Remove Motor and Brake 83 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-6 Install Motor and Brake 84 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-7 Remove Caster Wheel 85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-8 Install Caster Wheel 85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 9 − SERVICING THE DRIVE HANDLE ASSEMBLY 86 . . . . . . . . . . . . . . . . . . . . .

9-1 Handle Sensor Removal 86 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-2 Handle Sensor Installation 87 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-3 Handle Drive Enable Switch Removal 88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-4 Handle Drive Enable Switch Installation 88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 10 − SERVICING THE HIGH VOLTAGE TRANSFORMER 90 . . . . . . . . . . . . . . . .

10-1 High Voltage Transformer Removal 90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-2 High Voltage Transformer Installation 91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 11 − SERVICING THE POWER CORD, REEL ASSEMBLY, CABLE ROUTING 92

11-1 Cord/Cord Reel Removal 92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-1-1 Cord Reel Removal (Domestic Models) 92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-1-2 Cord Reel Removal (IEC Models) 92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-2 Cord/Cord Reel Installation 93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-2-1 Cord Reel Installation (Domestic Models) 93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-2-2 Cord Reel Installation (IEC Models) 93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3 Horizontal Arm and Vertical Column Cable Routing 93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-1 Cathode Cable 94 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-2 Anode Cable 96 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-3 Collimator Cable 97 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-4 Stator Cable 101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-5 Horizontal Arm Brake Cable 102 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-6 Control Cable 102 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-3-7 Vertical Column Brake Cable 103 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 12 − HAND SWITCH CLEANING & DISINFECTING INSTRUCTIONS 104 . . . . . .

SECTION 13 − PERIODIC MAINTENANCE PROCEDURE FOR HAND SWITCH 104 . . . . .

SECTION 14 − SERVICING SAFETY CONTACTOR ON THE X−RAY CONTROL MODULE 105

xv

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

THIS PAGE INTENTIONALLY LEFT BLANK.

xvi

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

AMX−4+ SERVICE

Indentification

See Illustration 1. The AMX−4+ is identified by Model Number on the rating plate located on the top

cover. Model part and catalog numbers are identified in Table 1. This direction contains instructions for

performing mechanical maintenance on these Units.

TABLE 1

AMX−4+ MODELS

Description Part number

domestic 2169360−7 a0659f 2236420−7 & 2275938−7 A0659JF

domestic, aec 2169360−8 a0659fa 2236420−8 & 2275938−8 A0659JG

domestic, tech switch 2169360−9 a0659fc 2236420−9 & 2275938−9 A0659JH

domestic, aec, tech switch 2169360−10 a0659fb 2236420−10 & 2275938−10 A0659JJ

iec, emc 2169360 a0659a 2236420 & 2275938 A0659J

iec, emc, aec 2169360−2 a0659aa 2236420−2 & 2275938−2 A0659JA

iec, emc, tech switch 2169360−3 a0659ab 2236420−3 & 2275938−3 A0659JB

iec, emc, aec, tech switch 2169360−4 a0659ac 2236420−4 & 2275938−4 A0659JC

japan 2169360−5 a0659c 2236420−5 & 2275938−5 A0659JD

japan short column 2169360−6 a0659d 2236420−6 & 2275938−6 A0659JE

ILLUSTRATION 1

AMX−4+ IDENTIFICATION

catalog

number

Part number

catalog

number

RATING

PLATE

1

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

The instructions cover the removal, installation, and adjustment of the field serviceable assemblies and

parts comprising the unit. Illustrations are provided as a supplement to the procedures to assist the

service technician in understanding the relationship of the parts involved.

Definition of Terms

The front end of the unit is defined as the end containing the vertical column and bumper assembly. Left

and right sides are determined by standing at the rear (handle end) of the unit, facing the unit.

Tools and Materials

A list of tools required to perform the service adjustment procedures is given below. With the exception of

the vertical column lifting tool and floor jack, the tools listed are part of the standard complement of tools

supplied in the service technician’s tool kit.

Tools

− Vertical column lifting tool (46−303362P1)

− AMX−4 Series Lifting Jack (46−302966P1)

− Counterweight Lifting Tool (46−303491G1)

− Collimator Tool Kit (5340328)

− HHS Field Test Kit (46−177372G1)

− Torque Wrench 2−36 pound−inches/0.23 4.1 Newton−meters (46−282782P1)

− Torque Wrench Kit (46−268445G1)

− H/V Cable Spanner Wrench (507A935G1)

Materials

− Loctite sealant type 242 (46−170686P2 10 cc bottle) and 290 (46−170687P2 50cc bottle)

− Bearing grease − Lithium (Fiske 630−A−A) or equal

− Silicone insulating compound (46−125224P3 3 oz. tube)

− Diala AX Dielectric Insulating Oil (T0552G 1 gallon)

− Electrical tape

− Cotton rags

− Cotton swabs

Periodic Inspection

Periodic inspection instructions for various assemblies of the AMX−4+ are listed in the maintenance

schedule given in Direction 2173227−100, AMX−4+ Periodic Maintenance. All deficiencies uncovered

during inspection should be corrected before further use of the equipment.

Removal and Installation Procedure Index

A list of AMX−4+ assemblies for which removal and installation procedures are provided in the following

index. The index lists the section in which the procedure is presented, the name of the assembly, and the

number of the paragraph that contains the removal or installation procedure.

2

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

SECTION

TITLE

Section 2

Servicing the

Collimator Assembly

Section 3

Servicing the X−ray

Tube Assembly

Section 4

Servicing the

Horizontal Arm

Assembly

Section 5

Servicing the Vertical

Column Assembly

Section 6

Servicing the Trim

Covers

Section 7

Servicing the Base

Assembly

Section 8

Servicing the Handle

Assembly

Section 9

Servicing the High

Voltage Transformer

Section 10

Servicing the Latch

Assembly and Cable

Routing

ASSEMBLY

NAME

Collimator Assembly 2−1 2−2

X−Ray Tube Assembly 3−1 3−2

Yoke Assembly
Yoke Mounting Plate Assembly
Horizontal Arm Assembly
Brake − Cable Assembly
Cable Assembly
Brake Assembly

Vertical Column
Cables
Upper Pulley and Brake Assembly
Counterweights
Upper Brake Assembly
Upper Pulley and Bearings
Carriage Assembly
Carriage Bearings
Lower Brake and Bearings
Column Base
Lower Pulley and Bearings
Column Support

Cassette Drawer
Side Covers
Top Cover

Gates Battery
Bumper Assembly
Bumper Switch
Bumper Bearings
Motor and Brake
Drive Wheel
Caster Wheel

Sensor Assembly
Drive Enable Switch

Transformer 9−1 9−2

Latch Assembly (Hall Effect Switch)
Cord/Cord Reel
Cord Reel
Cable Routing
Cathode Cable
Anode Cable
Collimator Cable
Stator Cable
Horizontal Arm Brake Cable
Control Cable
Vertical Column Brake Cable

REMOVAL

PARAGRAPH

4−1
4−3
4−5
4−7
4−9
4−11

5−1
5−3
5−5
5−7
5−9
5−11
5−13
5−15
5−17
5−19
5−21
5−23

6−1
6−3
6−5

7−1
7−3
7−5
7−7
7−9
7−11
7−13

8−1
8−3

10−1
10−3
10−5−2

INSTALLATION

PARAGRAPH

4−2
4−4
4−6
4−8
4−10
4−12

5−2
5−4
5−6
5−8
5−10
5−12
5−14
5−16
5−18
5−20
5−22
5−24

6−2
6−4
6−6

7−2
7−4
7−6
7−8
7−10
7−12
7−14

8−2
8−4

10−2
10−4
10−5
10−5−1
10−5−2
10−5−3
10−5−4
10−5−5
10−5−6
10−5−7

3

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

THIS PAGE INTENTIONALLY LEFT BLANK.

4

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

SECTION 1 − LOCK−OUT TAG−OUT (LOTO)

LOTO Procedure for “Electrical” Power

Name of Equipment: AMX −4+

Step

1 Prepare for shutdown of equipment by making sure you know where the system circuit breaker and AC power plug is

located, and have:

Lockout/Tagout Procedure

− A pair of safety glasses

− Voltage meter

− Approved AC power plug locking device

− Multiple locking device if more than one lock is to be applied, and enough personal LOTO locks
and tags for everyone in the group.

2 Notify affected personnel working in the area that lockout/tagout is being performed.
3 Shut down the AMX−4+ system by turning the keyswitch to OFF.
4 Place the system main circuit breaker to the OFF position.
5 Locate an approved AC power plug locking device and place on the AC power plug.
6 Attach personal LOTO lock and tag to the AC Power Plug locking device.
7 Wait 3 minutes for discharge of capacitors.
8 Remove the left side of the cover.
9 Locate the Main Chassis Ground Lug or Lugs (some models have two lugs) on the lower left side just above the battery

compartment access panel. Remove all wires connected to the ground lugs and individually tape each one to ensure each
cannot make contact with any other lug or any other item or device.

10 Make sure the system will not turn on by turning the keyswitch ON in the upper left corner on the console and looking for

lights on the right side of the console. Turn the keyswitch to OFF after verifying the system does not power up.

11 Make sure the voltage meter is working properly by testing it on a known live voltage (like a wall outlet).

12 Verify electrical power has been removed by using a voltmeter and testing for voltage between the main circuit breaker

switch upper power connection and the main chassis ground lug located on the lower left side just above the battery

compartment access panel.
13 Service/repair system.
14 Notify affected personnel that LOTO devices are being removed and equipment will be re−energized.
15 Verify the area is safe to re−energize the equipment.
16 Ensure any safety guards or devices have been reinstalled.
17 Return system functions to their normal OFF state.
18 Locate the Main Chassis Ground Lug or Lugs (some models have two lugs) on the lower left side just above the battery

compartment access panel. Remove tape and reconnect to the chassis ground lugs.
19 Remove personal LOTO lock and tag.
20 Communicate to everyone in the area that the system is about to be re−energized.
21 Place the main system circuit breaker to the ON position.
22 Turn on the system by turning the key switch in the upper left corner on the console to the ON position and test it for proper

operation.

5

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

SECTION 2 − SERVICING THE COLLIMATOR

This section provides procedures covering the removal and installation of the collimator. It also provides
procedures for replacing and aligning the field lamp, aligning the crosshairs, and replacing the brake and
field lamp switches.

2-1 Collimator Removal

1. Close collimator blades.

2. Rotate X−ray tube and collimator assembly so collimator crosshair window is facing upward.

3. Place the horizontal arm assembly in park position on top cover of unit.

Potential for sudden and unexpected arm motion: Secure the horizontal
arm before removing components from the arm. Removing weight allows
the counterweight to descend rapidly and the arm to ascend rapidly
possibly causing damage to the unit and personal injury. Use
Counterweight Lift Tool 46−303491G1 or equivalent service tool.

4. Shut off power by turning the main circuit breaker to the OFF position.

5. Remove two screws in bottom of terminal box located on back of vertical column and lift off cover.
See Illustration 2−1.

6. Disconnect collimator cable leads from terminal block. Record and tag leads.

7. Remove Heyco bushing and cable through bottom of terminal box.

ILLUSTRATION 2−1

TERMINAL BOX AND COLLIMATOR CABLE ROUTING

STRAP POINT G

TERMINAL BOX

CLAMP POINT E

COLLIMATOR CABLE

CLAMP POINT H

TIE WRAPS

STRAP POINT N

8. Cut ty−raps securing collimator cable to cathode cable and remove from Strap Points G and N, and
Clamp Points E and H.

9. Remove three 10−24  0.75 hex socket head cap screws securing collimator assembly to X−ray
tube. See Illustration 2−2.

10. Remove collimator from interface plate.

6

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 2−2

COLLIMATOR

BRAKE
SWITCH
HANDLE

SOCKET HEAD
CAP SCREWS

FIELD LIGHT
SWITCH

BRAKE
SWITCH
HANDLE

2-2 Collimator Interface and Port Plates Check

Note: The collimator interface plate for every new and reloaded tube from the GE Reload Facility is factory aligned

and should not be disturbed. If plate alignment is altered, the plate will have to be re−aligned in the field.

1. Close collimator blades.

2. Rotate X−ray tube and collimator assembly so collimator crosshair window is facing upward.

3. Place the horizontal arm assembly in park position on top cover of unit.

Potential for sudden and unexpected arm motion: Secure the horizontal
arm before removing components from the arm. Removing weight allows
the counterweight to descend rapidly and the arm to ascend rapidly
possibly causing damage to the unit and personal injury. Use
Counterweight Lift Tool 46−303491G1 or equivalent service tool.

4. Shut off power by turning the main circuit breaker to the OFF position.

5. Remove three 10−24  0.75 inch hex socket head cap screws securing collimator assembly to
X−ray tube. See Illustration 2−2.

7

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 2−3

PORT AND COLLIMATOR INTERFACE PLATE INSTALLATION

MOBILE SYSTEMS USE EITHER
FOUR OR EIGHT 1/4−20 X 0.625 INCH
PORT PLATE SCREWS

TUBE
HOUSING

SECTION “A”
(WITH COLLIMATOR REMOVED)

PORT PLATE

10−32 X 0.50 INCH
INTERFACE PLATE
SCREWS

TUBE
HOUSING

INTERFACE
PLATE

6. Remove collimator from interface plate. See Illustration 2−3.

7. Carefully place collimator and cables on horizontal arm.

8. Check that each X−ray port plate screw is securely fastened in place.

9. If any port plate screw is loose, unscrew it until it touches the interface plate.

Do not remove collimator interface plate. This plate is factory aligned and
should not be disturbed. (However, if any of the interface plate screws are
loose, re-torque them to 32−40 pound−inches (3.6−4.5 N−m)).

10. Tighten the port plate screw to 45−50 pound−inches (5.1− 5.6 N−m) using tools in Collimator Service
kit P/N 5340328.

8

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

11. Turn collimator upside down and insert cone into the tube port interface plate. Align mounting screw
holes.

12. Attach collimator assembly to tube port interface plate with three 10−24  0.75 inch hex socket
head cap screws. T orque to 50−60 pound−inches (5.6−6.8 N−m).

2-3 Collimator Installation

1. Disconnect power from the unit by switching the main circuit breaker to the OFF position.

2. Horizontal arm assembly is in parked position on top cover of unit (or counterweight is secured)

3. X−ray tube is facing upward.

Equipment Damage: Do not bump the cone when handling the collimator,
especially when mounting it on the tube. It is made of lead and damages
easily.

For systems manufactured On or After June 10th, 2006 there is an
additional 1.2 mm Aluminum filtration cup addedto the X−Ray Tube. This
cup must be present and installed to meet regulatory HVL requirements.
Likewise is this cup is provided with a replacement tube it must be
removed for systems manufactured before June 10th, 2006. Reference the
system rating plate affixed to the AMX Unit.

4. Turn collimator upside down and insert cone into the tube port interface plate. Align mounting screw
holes.

5. Attach collimator assembly to tube port interface plate with three 10−24  0.75 inch hex socket
head cap screws. T orque to 50−60 pound−inches (5.6−6.8 N−m).

6. Route collimator cable along the cathode cable to strap point on side of the column. Secure
collimator cable in place with ty−raps to the cathode cable. See Illustration 2−1.

7. Drape the cable from the side of the column to the terminal box on the back of the column. Insert
the cable with a Heyco bushing up through the bottom of the terminal box.

8. Connect collimator cable leads to terminal block in accordance with connection data recorded and
tagged on leads.

9. Position back cover on terminal box and secure with two screws.

10. Rotate X−ray tube and collimator assembly to a port down position.

Note: If the collimator being installed is a replacement, perform “Beam Quality (Half Value Layer)” in Direction

2173227−100 AMX−4+ Periodic Maintenance. Also perform “Functional Test − Manual Rad Collimator Ver­sion” in Tab 6 of Direction 46−013894, System Field Test for HHS.

2-4 Tape Measure Replacement

Note: This procedure is for the Micro Medical Systems collimator (46−270615P2) only. For the Medys collimator

(46−270615P3), the tape measure is not a replaceable part.

1. Remove the two (2) Phillips screws (M3x6) which attach the old tape measure to the left−side
collimator cover.

2. Install the new tape measure and tighten the screws:

· For a HRT X−ray tube (46−155750G804), use the upper mounting holes of the tape measure.

· For an Orion X−ray tube (2185226), use the lower mounting holes of the tape measure.

9

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

2-5 Field Lamp Replacement

1. Disconnect power from the unit by switching the main circuit breaker to the OFF position.

2. Remove the rear cover on the collimator by removing four metric Phillips
head screws holding it in place. Remove the cover.

3. Close the collimator blades. This makes it easier to reach the lamp for removal and replacement.

Potential for equipment damage (field lamp): Field lamp should never be
touched with bare fingers since chemicals on skin will damage lamp and
reduce its useful life. Always use gloves, tissue or soft cloth when
handling lamp. If the outside of the lamp becomes contaminated, clean
with a soft cloth dampened in water. Wipe dry after cleaning.

4. Carefully remove the lamp by pulling it straight back and out of its receptacle. Replace it with a new
lamp. Refer to renewal parts listing for correct lamp. See Illustration 2−4.

5. Whenever a lamp is replaced, the light field intensity must be checked. Refer to the HHS Collimator
Test section of Direction 46−013894 (System Field Test for HHS).

6. Whenever a lamp is replaced, the light field and X−ray field sizes must be checked to be certain the
difference between them does not exceed a specified maximum tolerance. Refer to Section 2-6,
Light Field Adjustment, to make these measurements and any necessary adjustments.

ILLUSTRATION 2−4

FIELD LAMP REPLACEMENT

2-6 Light Field Adjustment

The X−ray field and light field must be properly aligned to meet HHS requirements. Two methods for
accomplishing this are given below.

LAMP

Method 1, Section 2-6-1 is only used if the “Light Field to X−Ray Field Test Pattern,” 46−198466P1, from
an HHS Field Test Kit, 46−177372G1, is available.

Method 2, Section 2-6-2, uses lead strips to indicate the light field areas.

10

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

2-6-1 Adjustment Method 1

1. Place loaded cassette (14  17 inches suggested) on floor directly beneath collimator.

2. Adjust the collimator so that it is parallel to the cassette.

3. Set SID to 40 inches.

4. Place light field to X−ray field test pattern on top of cassette.

5. Turn on field lamp.

6. Adjust collimator blades so light field exactly covers the 8  10 inch (20.32 x 25.4 cm) rectangle on
the test pattern. See Illustration 2−5.

ILLUSTRATION 2−5

APPEARANCE OF X−RAY FIELD AND LIGHT FIELD ALIGNMENT ON EXPOSED FILM USING TEST PATTERN

FILM

TEST PATTERN

C

8 X 10 INCH TEST
RECTANGLE
(LIGHT FIELD)

X−RAY FIELD

AB

D

HORIZONTAL
DIFFERENCE

SECOND
EXPOSURE

VERTICAL
DIFFERENCE

7. Expose film.
> 60 kVp, 2 mAs.
> Do not disturb the cassette and pattern because a second exposure is to be made.

8. Open collimator blades wide enough to include test pattern.

9. Expose film a second time and develop the film.
> 60 kVp, 2 mAs.

> This exposure should include the 810 inch rectangle. Refer to Illustration 2−5. If the rectangle

does not show, reload the cassette and repeat steps 1 through 8 but open the collimator blades
in step 7 wider than last time.

10. Measure and record the horizontal A & B distances, in inches, between the X−ray field and the light
field. See Illustration 2−5.

11. Measure and record the vertical C & D distances, in inches, between the X−ray field and the light
field. See Illustration 2−5.

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12. The total of the horizontal differences as well as the total of the vertical differences must each be
less than 1.8% of the SID:

> A + B < 1.8% SID = A + B < 0.018  40 inches = A + B < 0.72 inches
> C + D < 1.8% SID = C + D < 0.018  40 inches = C + D < 0.72 inches

If the above requirements are met, go to step 18. If they are not met, proceed with the following steps.

Note: Ideally, the X−ray field and the light field should coincide but this is rarely the case. The best compromise is to

move the light field so the X−ray field is centered within it. Usually the light field area will be larger than the
X−ray area. The size and location of the light field can be adjusted by moving the bulb.

13. To place the two fields as close to coincidence as possible, only the light field area is moved. The
light field area adjustment is made by repositioning the field lamp housing.

14. Loosen the two Phillips head adjustment screws located in the back of the collimator. See Illustration
2−6.

ILLUSTRATION 2−6

FIELD LAMP ADJUSTMENT

ADJUSTMENT SCREWS

15. Examine the last exposure and determine which direction to move the field lamp to best position it
around the X−ray field.

16. Turn on the field lamp.

Bright light might cause temporary blindness: Components are hot in the
high energy field lamp adjustment area. Do not look directly at the field
lamp.

17. The field lamp adjustment area will be hot, so use a metal tool to move the bracket when
repositioning the light field area on the film cassette.

18. When the light field area has been repositioned equal distant around the X−ray field, tighten the
adjustment screws. Alternately tightening the two screws will help prevent the bracket from slipping
out of place.

19. Repeat steps 1 through 16 until the “percentage of SID” requirements are obtained.

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Note: If the percentage of SID requirement cannot be obtained, the light field is either too large or in rare instances

too small. In this case the collimator will have to be returned to the factory.

20. Replace the back cover and fasten it in place with four metric Phillips head screws.

21. After any adjustment to the field light area, the collimator crosshair window position should be
checked and corrected if necessary. Refer to Section 2−7.

2-6-2 Adjustment Method 2

1. Place loaded cassette (14  17 inches (35.56 x 43.18 cm) suggested) on floor directly beneath
collimator.

2. Set SID to 40 inches.

3. Set collimator for 8  10 inches.

4. Turn on field lamp.

5. Place lead strips at each corner of light field to indicate size of field. See Illustration 2−7 .

6. Expose film. Do not move film cassette.
> 60 kVp, 2 mAs.

7. Open collimator blades.

8. Expose film a second time and develop the film.
> 60 kVp, 2 mAs.

Note: This exposure should include the lead strips marking the corners of the light field. See Illustration 2−7. If the

lead strips do not show , reload the cassette and repeat steps 1 though 8 but open the collimator blades in step
7 far enough to include the lead strips.

ILLUSTRATION 2−7

APPEARANCE OF X−RAY FIELD AND LIGHT FIELD ALIGNMENT ON EXPOSED FILM USING LEAD STRIPS

FILM

LEAD STRIPS

C

LIGHT FIELD

X−RAY FIELD

AB

D

HORIZONTAL
DIFFERENCE

VERTICAL
DIFFERENCE

9. Measure and record the horizontal A & B distances, in inches, between the X−ray field and the light
field. See Illustration 2−7.

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10. Measure and record the vertical C & D distances, in inches, between the X−ray field and the light
field. See Illustration 2−7.

11. The total of the horizontal differences as well as the total of the vertical differences must each be
less than 1.8% of the SID:

> A + B < 1.8% SID = A + B <0 .018  40 inches = A + B < 0.72 inches
> C + D < 1.8% SID = C + D <0 .018  40 inches = C + D < 0.72 inches

If the above requirements are met, go to step 18. If they are not met, proceed with the following
steps.

Note: Ideally, the X−ray field and the light field should coincide but this is rarely the case. The best compromise is to

move the light field so the X−ray field is centered within it. Usually the light field area will be larger than the
X−ray area.

12. To place the two fields as close to coincidence as possible, only the light field area is moved. The
light field area adjustment is made by repositioning the field lamp housing.

13. Loosen the two Phillips head adjustment screws located in the back of the collimator. See Illustration
2−8.

14. Examine the last exposure and determine which direction to move the field lamp to best position
light field around the X−ray field.

15. Turn on the field lamp.

ILLUSTRATION 2−8

FIELD LAMP ADJUSTMENT

ADJUSTMENT SCREWS

Bright light might cause temporary blindness: Components are hot in the
high energy field lamp adjustment area. Do not look directly at the field
lamp.

16. The field lamp adjustment area will be hot so use a metal tool to move the bracket when
repositioning the light field area on the film cassette.

17. When the light field area has been repositioned equidistant around the X−ray field, tighten the
adjustment screws. Alternately tightening the two screws will help prevent the bracket from slipping
out of place.

18. Repeat steps 1 through 16 until the percentage of SID requirements are obtained.

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Note: If the percentage of SID requirement cannot be obtained, the light field is either too large or in rare instances

too small. In this case the collimator will have to be returned to the factory.

19. Replace the back cover and fasten it in place with four metric Phillips head screws.

20. After any adjustment to the field light area, the collimator crosshair window position should be
checked and corrected if necessary. Refer to Section 2-7.

2-7 Crosshair Window Adjustment

1. After any adjustment to the field light area the collimator crosshair window position should be
checked and corrected if necessary.

2. Place Light Field to X−Ray Field Test Pattern, 46−198466P1, directly under the collimator. If the test
pattern is not available use a sheet of rectangular paper and draw a cross extending from exact
center to each edge and parallel to the sides of the sheet.

3. Turn on field lamp and adjust collimator blades so edges of light field are coincident with the
rectangle on the test pattern or the sides of the paper sheet. This may involve moving the test
pattern or paper sheet.

4. Check the window crosshairs. The crosshairs must be within 1/4 inch of the pattern centerlines or
cross (including the width of the crosshair shadow) over the entire length of the crosshairs.

5. If the window crosshairs are not properly aligned, go to step 7. If the window crosshairs are properly
aligned, do not perform steps 7 through 9.

6. Loosen the four screws retaining the crosshair window in the bottom or exit side of the collimator.

7. Gently slide the window until the crosshairs are aligned with the test pattern centerlines or the cross
on the paper.

8. Tighten the four screws retaining the crosshair window.

2-8 Field Light Switch Replacement

Note: This procedure is for the Micro Medical Systems collimator (46−270615P2) only. For the Medys collimator

(46−270615P3), the field light switch is not a replaceable part.

1. Place horizontal arm in lock position.

2. Shut off power by turning the main circuit breaker to the OFF position.

3. Use a small screwdriver and very carefully pry the field light switch out of the collimator control
panel. The switch press fits into the panel and will easily snap out of the panel. A short length of two
wires will be attached to the switch. Use care not to scratch the panel during this procedure. See
Illustration 2−2.

4. Unsolder the two wires.

5. Resolder two wires to the terminals on new replacement switch.

6. Carefully insert the switch and wires into the panel and press into place.

2-9 Field Size Pointer Replacement

Note: This procedure is for the Micro Medical Systems collimator (46−270615P2) only. For the Medys collimator

(46−270615P3), the field size pointers are replaceable parts.

1. Use a 2 mm hex wrench to loosen the two (2) M4 setscrews that attach the knob to the shaft. Slide
the knob off of the shaft.

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2. Use a 1.5 mm hex wrench to loosen the two (2) M3 setscrews that attach the pointer to the shaft.
Slide the pointer off of the shaft.

3. Slide the new pointer onto the shaft and lightly tighten the two set screws. Perform the following
steps to correctly align the pointer:

a. Place a loaded 12 inch x 14 inch cassette (or phosphor tool − 2120565) on the floor and center it

to the collimator light field.
b. Use the tape measure to position the collimator/X−ray tube at a 40 inch SID.
c. Adjust the collimator so that the pointers are set for a 10 inch x 10 inch field.

POTENTIAL EXISTS FOR EXPOSURE TO IONIZING RADIATION. USE A
LEAD APRON OR STAND BEHIND LEAD SHIELDING DURING EXPOSURE.

d. Select 60kVp, 4−5 mAs (or follow exposure instructions on phosphor tool) and make an exposure.
e. Measure the exposed area size on the developed film (or read from the phosphor tool).
f. Verify that the indicated field size (as shown by the pointer) matches the actual exposed area size

within 1.7% SID (0.68 inches).
g. If necessary, loosen pointer setscrews, adjust pointer to match the measured size, then tighten the

setscrews. Take another exposure to verify that the indicated field size (as shown by the pointer)

matches the actual exposed area size within 1.7% SID (0.68 inches). Repeat this step until the

specification is met.
h. Install the knob onto the shaft and tighten the two setscrews.

2-10 Front Panel Replacement (Medys collimator)

Note: This procedure is for the Micro Medical Systems collimator (46−270615P2) only. For the Medys collimator

(46−270615P3), the front panel is not a replaceable part.

1. Shut off power by turning the main circuit breaker to the OFF position.

2. Close the collimator blades.

3. Rotate the X−ray tube and collimator assembly so the collimator cross−hair window is facing
upward.

4. Place horizontal arm in lock position.

5. Place the horizontal arm assembly in park position on the top cover of the unit.

Potential for sudden and unexpected arm motion: Secure the horizontal
arm before removing components from the arm. Removing weight allows
the counterweight to descend rapidly and the arm to ascend rapidly
possibly causing damage to the unit and personal injury. Use
Counterweight Lift Tool 46−303491G1 or equivalent service tool.

6. Disassembly:
a. Use a 2 mm hex wrench to loosen the two (2) M4 setscrews that attach the knob to the shaft. Slide

the knob off of the shaft.

b. Use a 1.5 mm hex wrench to loosen the two (2) M3 setscrews that attach the pointer to the shaft.

Slide the pointer off of the shaft.

c. Remove the rear cover on the collimator by removing four metric Phillips

head screws holding it in place. Remove the rear cover.

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d. Remove the two (2) Phillips screws (M3x6) which attach the old tape measure to the left−side colli-

mator cover. Remove the tape measure.
e. Remove the four (4) screws M3x6 (Phillips) fastening the lateral cover to the top of the central body .
f. Remove the two (2) screws M3x6 (Phillips) fastening the lateral cover to the rear of the central body .
g. Remove the lateral cover by pulling it towards the rear of the collimator.
h. Unscrew the six (6) screws M3x6 (Phillips) fastening the front panel to the left and right sides of the

central body, but do not remove the front panel yet.

Note: The screws are secured with thread fastener and may require additional effort to unscrew them.

i. Carefully examine the routing for the wires that are connected to the front panel so that you will be

able to duplicate the routing when the new front panel is attached to the central body. If the cable

routing is not correct, the front panel is difficult to install.
j. Carefully pull out the front panel. Remember; the front panel is still linked to the central body

by means of the switches connector.

k. Disconnect the switches connector and remove the front panel.

7. Install the new front panel (reverse the disassembly sequence). If the new front panel does not line
up with the six (6) mounting holes in the central body, make sure that the cable routing is the same
as noted in step i (above).

8. Final Checks − When the new front panel is assembled with its knobs and pointers, perform the
following checks and adjustments:

a. Light Field adjustment (see Section 2-6 in this manual).
b. Cross hair Window adjustment (see Section 2-7 in this manual).
c. Field Size Indicator adjustment (see Section 2-9 in this manual).

2-11 Brake Switch Replacement

Note: This procedure is for the Micro Medical Systems collimator (46−270615P2) only. For the Medys collimator

(46−270615P3), the brake switch is not a replaceable part.

1. Place horizontal arm in lock position.

2. Shut off power by turning the main circuit breaker to the OFF position.

3. To prevent parts from falling out of the collimator handles when opening them, rotate the X−ray tube
to position the back side of the collimator handles pointing upward.

4. Select the switch to be replaced and remove the two Phillips head screws from the switch retaining
plate. Remove the plate.

5. Lift off the switch button and button return spring.

6. Pull the switch from the handle.

7. Unsolder the two wires.

8. Solder the two wires onto the new replacement switch.

9. Place the new switch in the same position as the switch which was replaced.

10. Replace the button return spring and the switch button.

11. Replace the switch retaining plate. Install and tighten the two Phillips head screws.

12. Test the switch to be sure that it activates/deactivates, and does not stick in the ON position.

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ILLUSTRATION 2−9

BRAKE SWITCH REPLACEMENT

(2) PHILLIPS SCREWS

SWITCH
RETAINING
PLATE

BUTTON
RETURN
SPRING

MICRO
SWITCH

SWITCH
BUTTON

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SECTION 3 − SERVICING THE X−RAY TUBE

This section provides procedures covering the removal and installation of the X−ray tube.

3-1 X−Ray Tube Removal

Secure the horizontal arm before removing components from the arm.
Removing weight allows the counterweight to descend rapidly and the arm
to ascend rapidly possibly causing damage to the unit and personal injury.
Use the Counterweight Lift Tool 46−303491G1 or equivalent service tool.

1. Remove collimator from X−ray tube. Refer to Section 2-1, steps 1 through 10 for removal
instructions.

2. Disconnect anode and cathode High Voltage cable connectors from X−ray tube. See Illustration 3−1.

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ILLUSTRATION 3−1

X−RAY TUBE ASSEMBLY

BUTTON HEAD SCREW

TUBE FRONT COVER

MOUNTING
PLATE

HEX SOCKET
FLAT HEAD
SCREWS

YOKE ASSEMBLY

DECAL

RATING
PLATE

10−32 X 1/2
HEAD SCREW (2)

HV CABLE

(ANODE)

CONTROL CABLE

TUBE REAR COVER

HV CABLE
(CATHODE)

3. Remove four button head screws securing top and rear of back cover to X−ray tube and lift off
cover.

4. Disconnect control cable leads from terminal block on tube cable bracket. Record and tag lead
connections.

5. Remove cable clamp securing control cable to cable bracket by removing three socket head cap
screws.

6. Support the X−ray tube and remove the three hex socket flat head screws securing each end of the
tube to mounting plates on the yoke assembly.

7. Remove X−ray tube assembly from yoke assembly

3-2 X−Ray Tube Installation

For Tube Change there is an additional 1.2 mm Aluminum cup added to
the X−Ray Tube. This cup must be present and retained for systems
manufactured On or After June 10th, 2006. Likewise this cup if provided
with the replacement tube must be removed for systems manufactured
before June 10th, 2006. Reference the system rating plate affixed to the
AMX unit.

1. For systems manufactured On or After June 10th, 2006 an additional 1.2 mm Aluminum filtration
cup is added to the X−Ray Tube. The presence of this cup is easily identified as you cannot see the
glass tube port. The cup is retained by clipping onto the Collimator mounting plate.

i. Carefully remove filtration cup from original tube.
ii. Carefully insert filtration cup onto replacement tube. Ensure cup is secure.
iii. Install new filtration label, part # 5179736, next to the system rating plate.

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Note: In the event the filtration cup is missing or unavailable for transfer from the old tube, order part num-

ber 5180389. This kit contains a label and a new filtration cup.

2. Support X−ray tube assembly in a position between mounting plates on yoke assembly. See
Illustration 3−1.

3. Attach each end of tube to mounting plates with three hex socket flat head screws. Torque to 50
pound−inches (5.6 N−m).

4. Position control cable in tube cable bracket. Replace cable clamp and secure in place using three
socket head cap screws.

5. Connect control cable leads to terminal block on tube cable bracket in accordance with connection
data recorded and tagged on leads.

Note: If installing a new tube, use color code and match leads.

6. Position back cover on X−ray tube assembly and secure to tube with four 10−32  1/2 inch button
head screws.

7. Cover anode and cathode HV connectors with Silicone Insulating Compound, 46−125224P3. Refer
to Direction 46−013288 Bleeder, High Voltage, Dual Type.

8. Insert anode and cathode connectors into X−ray tube and secure firmly in place.

9. Check that tube rotates smoothly in yoke assembly when rotated forward and backward between
detent positions on yoke mounting plates.

10. Install collimator on X−ray tube. Refer to Section 2-3, steps 1 through 9.

11. If a new tube is installed, the field light must be checked for proper positioning. Refer to Section 2-6,
Adjusting the Field Light, for this procedure.

Note: If the tube being installed is a replacement, perform “Beam Quality (Half Value Layer)” in Direction

2173227−100 AMX−4+ Periodic Maintenance.

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SECTION 4 − SERVICING THE HORIZONTAL ARM

This section provides procedures covering the removal and installation of the field serviceable assemblies
and parts comprising the horizontal arm assembly.

4-1 Yoke Assembly Removal

Secure the horizontal arm before removing components from the arm.
Removing weight allows the counterweight to descend rapidly and the arm
to ascend rapidly possibly causing damage to the unit and personal injury.
Use Counterweight Lift Tool 46−303491G1 or equivalent service tool.

1. Remove the collimator. Refer to Section 2.

2. Remove the X−ray tube. Refer to Section 3.

POTENTIAL FOR EYE INJURY: WEAR EYE PROTECTION WHEN
REMOVING THE YOKE ASSEMBLY, SOME PARTS ARE SPRING LOADED
AND MAY CAUSE INJURY.

3. Holding cover in place, remove four capscrews securing cover to end of horizontal arm shaft. A
spring loaded detent positioning assembly is retained by the cover. Reach behind the cover, hold the
detent assembly in place and carefully remove cover. See Illustration 4−1.

ILLUSTRATION 4−1

YOKE ASSEMBLY

HORIZONTAL ARM ASSEMBL Y

THRUST
WASHER

DISC

LEFT TUBE

SUPPORT

SPRING WASHER

COVER

WASHER

1/4−20 x .625 HEX SOCKET
HEAD CAPSCREW

SHAFT

MOUNTING
PLATE

BEARING

THRUST
WASHER

THRUST BEARING

RIGHT TUBE

SUPPORT

SPRING

SPRING COVER

4. Carefully remove the detent assembly consisting of two spring covers, two springs and one shaft
with one bearing from recessed location in yoke mounting plate.

5. Slide three spring washers, disk, thrust washer and yoke mounting plate from the shaft on horizontal
arm.

6. Remove thrust bearing and thrust washer from horizontal arm shaft.

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4-2 Yoke Assembly Installation

EYE INJURY! WEAR EYE PROTECTION WHEN REMOVING THE YOKE
ASSEMBLY, SOME PARTS ARE SPRING LOADED AND MAY CAUSE
INJURY.

1. Lubricate thrust bearing with small amount of lithium (Fiske 630−A−A or equal) grease.

2. Install thrust washer and thrust bearing on horizontal arm shaft. See Illustration 4−1.

3. Place yoke mounting plate with tube supports on horizontal arm shaft.

4. Slide thrust washer, disk, and three spring washers onto horizontal arm. (Concave side of spring
washer facing you)

5. Place two springs and spring covers into recessed position in face of mounting plate.

6. Place shaft with bearing on the two springs and carefully install cover over end of horizontal arm
shaft.

7. Hold cover in place on horizontal arm shaft to prevent detent assembly from springing loose and
secure with four capscrews.

8. Install the X−ray tube. Refer to Section 3.

9. Install the collimator. Refer to Section 2.

4-3 Yoke Mounting Plate Assembly Removal

1. Remove collimator. Refer to Section 2.

2. Remove the X−ray tube. Refer to Section 3.

Right Mounting Plate Assembly (See Illustration 4−2)

3. Remove decal from cover on end of right tube support to access the cover mounting screws.

4. Remove four screws holding cover to mounting plate shaft.

5. Remove cover, two spring washers, two thrust washers and thrust bearing from mounting plate
shaft.

6. Slide shaft, disk, and mounting plate from right tube support.

7. Remove two small bearings and their shaft from right tube support.

8. Remove four screws holding shaft and disk to mounting plate.

9. Remove shaft and disk from mounting plate.

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ILLUSTRATION 4−2

RIGHT MOUNTING PLATE ASSEMBLY

1/4−20 X .625 HEX SOCKET FLAT
HEAD CAPSCREW

1/4−20 X .5 HEX SOCKET FLAT
HEAD CAPSCREW

10−32 X .500 HEX SOCKET
FLAT HEAD CAPSCREW

RIGHT TUBE SUPPORT

MOUNTING PLATE

DISK

MOUNTING PLATE SHAFT

BEARING

SHAFT

THRUST WASHER

COVER

10−32 X .500 HEX SOCKET
FLAT HEAD CAPSCREW

THRUST BEARING

SPRING WASHER

DECAL

Left Mounting Plate Assembly (See Illustration 4−3)

10. Remove decal from cover on end of left tube support to access the cover mounting screws.

11. Remove four screws holding cover to mounting plate shaft.

12. Remove two spring washers, disk and thrust washer from mounting plate shaft.

13. Slide shaft, thrust washer, dowel pin, disk, and mounting plate from left tube support.

14. Remove thrust washer and dowel pin from shaft.

15. Remove four screws holding shaft and disk to mounting plate.

16. Remove shaft and disk from mounting plate.

17. Remove eight hex socket flat head capscrews holding right and left tube support arms to mounting
plate.

18. Remove tube supports.

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ILLUSTRATION 4−3
LEFT MOUNTING PLATE ASSEMBLY

1/4−20 X .625 HEX SOCKET
FLAT HEAD CAPSCREW

1/4−20 X .500 HEX SOCKET FLAT
HEAD CAPSCREW

LEFT TUBE SUPPORT

SPRING

DECAL

10−32 X .500 HEX
SOCKET
FLAT HEAD
CAPSCREW

COVER

DISC

WASHER

THRUST WASHER

DOWEL PIN

4-4 Yoke Mounting Plate Assembly Installation

Right Mounting Plate Assembly

1. See Illustration 4−2. Place mounting plate shaft and disk on mounting plate.

2. Secure shaft and disk to mounting plate with four capscrews.

3. Replace two small bearings and their shaft in right tube support.

4. Slide mounting plate shaft with disk and mounting plate into right tube support.

5. Replace two thrust washers and thrust bearing, two spring washers and cover on mounting plate
shaft. (Spring washers, concave side facing out)

6. Secure cover to mounting plate shaft with four capscrews.

7. Replace decal on cover.

SHAFT

DISK

MOUNTING PLATE

10−32 X .500 HEX SOCKET
FLAT HEAD CAPSCREW

Left Mounting Plate

8. See Illustration 4−3. Place mounting plate shaft and disk on mounting plate.

9. Secure shaft and disc to mounting plate with four capscrews.

10. Replace washer and dowel pin on mounting plate shaft.

11. Slide mounting plate shaft with washer, dowel pin, disk and mounting plate into left tube support.

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12. Replace washer, disk and two spring washers on mounting plate shaft. (Spring washers, concave
side facing out)

13. Secure cover to mounting plate shaft with four capscrews.

14. Replace decal on cover.

15. Install the X−ray tube. Refer to Section 3.

16. Install the collimator. Refer to Section 2.

4-5 Horizontal Arm Assembly Removal

Equipment Damage! Secure the carriage before removing components
from the arm. Removing weight allows the arm to ascend rapidly possibly
causing damage to the unit and personal injury.

1. Check that the carriage is securely held in place, and that the horizontal arm cannot move upward.

2. Support the X−ray tube and collimator using chain hoist or other suitable equipment.

3. Remove the eight hex socket flat head screws that hold the yoke with tube head and collimator to
the mounting plate on the horizontal arm. See Illustration 4−4.

ILLUSTRATION 4−4

REMOVAL AND REMOUNTING OF X-RAY TUBE AND COLLIMATOR ASSEMBLY

1/4−20 X 5/8 HEX SOCKET

FLAT HEAD SCREWS (8)

X−RAY TUBE

COLLIMATOR

HORIZONTAL
ARM

MOUNTING
PLATE

YOKE

4. Lower tube and collimator gently to the floor.

5. Remove seven screws securing horizontal arm assembly to carriage in vertical column. See
Illustration 4−5. Discard screws.

6. Remove horizontal arm from carriage.

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ILLUSTRATION 4−5

HORIZONTAL ARM MOUNTING

1/4−20 X 3/4 LG HEX SOCKET
HEAD SCREWS(4) AND WASHERS (4)

CARRIAGE

COLUMN

1/4−20 X 3/4 HEX SOCKET
HEAD SCREWS(3) AND
WASHERS (3)

HORIZONT A L A R M

4-6 Horizontal Arm Assembly Installation

Note: The counterweight must be at the bottom of the column or otherwise immobilized.

1. Mount horizontal arm assembly on carriage assembly flanges. See Illustration 4−5.

2. While supporting the arm, secure it firmly in place with six mounting screws. Torque to 110
pound−inches (12.3 N−m).

3. Route brake cable along the anode cable to strap point on side of the column. Secure brake cable to
the anode cable with ty−raps.

4. Drape the cable from the side of the column to the terminal box on the back of the column. Insert
the brake cable with a Heyco bushing up through the bottom of the terminal box.

5. Connect brake cable leads to terminal block in accordance with connection data recorded and
tagged on leads.

6. Position back cover on terminal box and secure with two screws.

The horizontal arm must be secured before installing components on the
arm. Do not rely on latch alone to hold it in place. With weight removed
from the arm, the counterweight can descend rapidly and the arm ascend
rapidly possibly causing damage to the unit and personal injury. Use
Counterweight Lift Tool 46−303491G1 or equivalent service tool.

7. Firmly grasp the horizontal arm and using your weight to counterbalance the counterweight,
approximately 75 pounds (34 kg), carefully move it down to the top of the unit and into parked
position. Do not rely on latch alone to hold the arm in place. Check that the arm is locked down
before slowly removing your weight and releasing it.

8. Re-mount the X−ray tube and collimator assembly per Illustration 4−4.

9. Check that the arm moves freely up and down the column.

27

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

4-7 Horizontal Arm Brake and Cable Assembly Removal

1. Remove horizontal arm assembly. Refer to Section 4-5.

2. Position horizontal arm assembly with latch block up.

3. Extend Horizontal Arm until clearance hole on underside is exposed.

4. Remove cable clamp. See Illustration 4−6.

5. Disconnect Brake Cable connection.

6. Remove the two stop block capscrews securing the brake and cable assembly to the end of the
outer tube. See Illustration 4−6.

ILLUSTRATION 4−6

HORIZONTAL ARM OUTER, CENTER AND INNER TUBES

INNER SHAFT &

RETAINING

RINGS

INNER

TUBE
CENTER
TUBE

OUTER

TUBE

LATCH BLOCK
CAPSCREWS

MOUNTING PLATE

CAPSCREW

6−32 X 3/8 HEX SOCKET

FLAT HEAD

CABLE CLAMP

BRAKE CONNECTOR BRACKET

& GROUND WIRE

BRAKE CAPSCREWS

6−32 X .62 HEX SOCKET HEAD

BRAKE & CABLE ASSEMBLY
BRACKET CAPSCREWS
6−32 X 1/2 HEX SOCKET HEAD

STOP BLOCK
CAPSCREWS
10−32 X 1/2 HEX
SOCKET FLAT­HEAD

7. Return arm to upright position.

8. Slide the center and inner tubes from the outer tube.

9. Place center and inner tubes in upside down position.

10. Remove four screws holding latch block to center tube. Remove block. This provides access to the
mounting plate holding screw. See Illustration 4−6.

11. Remove mounting plate capscrew holding brake and cable assembly to the center tube.

12. Remove the two brake capscrews holding the brake & cable assembly to the rear of the center tube.

13. Remove two or three screws (depends on unit you have) holding the connector bracket and ground
wire to the center tube.

14. Remove two retaining rings from inner shaft on center tube. Slide shaft out permitting removal of two
spacers and two bearings.

15. Carefully slide the brake and cable assembly, and the inner tube from the center tube.

16. Remove two capscrews holding the brake and cable assembly bracket to the inner tube.

17. Remove brake and cable assembly from inner tube.

4-8 Horizontal Arm Brake and Cable Assembly Installation

1. Mount the brake and cable assembly on the inner tube.

2. Secure the brake and cable assembly bracket to the inner tube with two capscrews. See Illustration
4−6.

3. Carefully slide the brake and cable assembly, and the inner tube into the center tube.

4. Replace the inner shaft, two spacers and two bearings. Secure with two retaining rings.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

5. Place center and inner tubes in an upside down position.

6. Replace the two brake capscrews securing the brake & cable assembly to the rear of the center
tube.

7. Secure the connector bracket and ground wire to the center tube with two or three screws (depends
on unit you have).

8. Replace mounting plate capscrew holding brake and cable assembly to the center tube.

9. Replace the latch block and secure it with four screws to center tube.

10. Place the outer tube in an upside down position.

11. Slide the center and inner tubes into the outer tube.

12. Replace the two stop block capscrews and secure the brake and cable assembly to the end of the
outer tube.

13. Connect Brake Cable.

14. Extend Horizontal Arm until clearance hole on underside is exposed.

15. Replace cable clamp.

16. Return arm to upright position.

17. Replace horizontal arm assembly. Refer to Section 4-6.

29

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

4-9 Horizontal Arm Brake Cable Removal

1. Remove horizontal arm brake and cable assembly. Refer to Section 4−7.

2. Remove cable clip from bar support assembly by removing one machine screw. See Illustration 4−7.

ILLUSTRATION 4−7

BRAKE AND CABLE ASSEMBLY

MASTER LINK

CABLE BAR

CABLE BAR

PULLEY CABLE

PULLEY SHAFT

BEARING

PULLEY

WASHER

PULLEY BAR

MOUNTING BLOCK

PULLEY CABLE

10−32X5/8 INCH SCREW

10−32X1 INCH SCREW

PULLEY BAR

PULLEY CABLE

CABLE BAR

BRACKET

BRAKE CABLE

MOUNTING BLOCK

CABLE ANCHOR

6−40 1/8 INCH SCREW

10−32X1/2 INCH SCREW

BEARING
SPROCKET

BEARING

CHAIN SHAFT

BRAKE

6−32X5/8 INCH SCREW

BRAKE CHAIN

MASTER LINK

BRAKE WIRING

3. Remove anchor nut from brake cable by turning counterclockwise. This nut has been secured with
set screws and Loctite.

4. Remove cable anchor end from bar support.

5. Slide ball end of cable from slot in cable bracket and remove from path around pulley end on
mounting plate.

6. Remove the brake cable from brake and cable assembly.

4-10 Horizontal Arm Brake Cable Installation

1. Slide ball end of brake cable into slot in cable bracket on end of chain on brake and cable assembly.
See Illustration 4−7.

2. Route anchor end of cable around pulley on end of mounting plate to opposite end of support bar
and insert in slot.

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REV 20 DIRECTION 2173225−100

3. Replace anchor nut on cable end and take up slack by turning nut clockwise. Do not overtighten.

4. Replace cable clip, with brake cable in place, on bar support assembly and secure with one machine
screw.

5. Check that the cable and chain move freely.

6. Loctite the anchor nut.

7. Install horizontal arm brake and cable assembly. Refer to Section 4−8.

4-11 Horizontal Arm Brake Removal

1. Remove horizontal arm brake and cable assembly. Refer to Section 4−7.

2. Disconnect brake electrical cable connectors to remove from connector bracket.

3. Loosen remaining capscrew holding brake to mounting plate. See Illustration 4−7.

4. Slide brake off brake sprocket shaft.

4-12 Horizontal Arm Brake Installation

1. Slide brake onto brake sprocket shaft.

2. Secure brake with single capscrew in end of mounting plate. See Illustration 4−7.

3. Position brake electrical cable connectors in connector bracket and reconnect.

4. Install horizontal arm brake and cable assembly. Refer to Section 4−8.

31

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

SECTION 5 − SERVICING THE
VERTICAL COLUMN

This section provides procedures covering the removal and installation of the field serviceable assemblies
subassemblies and parts comprising the vertical column assembly.

5-1 Remove Vertical Column Assembly

1. Remove x−ray tube, collimator, and horizontal arm assemblies per Section 4−5.

2. Disconnect control cable leads from terminal block. Record and tag leads. See Illustration 5−1.

3. Remove Heyco bushing and cable through bottom of terminal box.

4. Clear all cables and wires from the column area.

5. Remove vertical column cap by removing two hex socket button head capscrews. See Illustration
5−1.

6. Attach lifting tool (46−303362P1 or equivalent service tool) to top of column with 2 screws.

7. Attach chain hoist to lifting tool (46−303362P1 or equivalent service tool) and take up slack. The
chain hoist must be capable of lifting a seven foot (2.1 meter), 175 lb. (80 kg) column a minimum of
two feet (61 cm), preferably 4 feet (122 cm).

ILLUSTRATION 5−1

COLUMN TRIM COVER REMOVAL

VERTICAL
COLUMN
CAP

SCREWS

COVER

CAPSCREW

VERTICAL
COLUMN
ASSEMBLY

TERMINAL BOX

SCREW
COVER

CONTROL CABLE

CLIP NUT

8. Remove trim cover from bottom of vertical column by removing three screws, two clip nuts and two
binding head screws. See Illustration 5−1.

9. Remove 5 bearing plate screws and washers securing column to the column support base.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

10. Remove two screws securing brake cable cover and disconnect the lower brake connectors. See
Illustration 5−2.

11. Move brake cable connectors and cover away from column support base.

12. Break loose the column support bearing from the column support base by jacking the column out
using three 1/4−20 screws thru the base plate and against the support base.

13. Lift the column and bearing plate out of the base.

14. Lower the column onto the floor or a table capable of supporting its weight. Carriage side must be
upwards.

15. Remove the chain hoist and lifting tool.

ILLUSTRATION 5−2

VERTICAL COLUMN REMOVAL

LIFTING TOOL

BRAKE CABLE

VERTICAL COLUMN

BEARING PLATE SCREW (5)
FLA T WASHER(5)

5-2 Install Vertical Column Assembly

BUSHING

BUSHING

COVER

DIODE

(2)

MOUNTING SCREWS

OR NUTS

LOWER BRAKE

CONNECTOR

COLUMN SUPPORT
BASE

1. Attach lifting tool (46−303362P1 or equivalent service tool) to top of pulley and brake assembly with
two capscrews. See Illustration 5−2.

2. Attach chain hoist to lifting tool.

Note: Make sure screw holes are clean of oil, grease or debris.

3. Lower the column into the base. Carefully seat the bearing plate in the base with the mounting holes
lined up and the lower brake connectors opposite the opening in the base. See Illustration 5−2.

4. Apply Loctite 242 (medium strength) to threads of five new column bearing plate capscrews.

33

AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

Note: Torque cap screws to 100 pound−inches (11.3 N−m).

5. Install five new capscrews and five new flat washers and secure bearing plate to the column support
base. See Illustration 5−2.

6. Connect brake connectors to brake. See Illustration 5−2.

7. Secure cover on column support base with two screws.

8. Replace trim cover at base of column. Refer to Section 6.

9. Insert control cable with Heyco bushing through bottom of terminal box located on back of vertical
column. See Illustration 5−1.

10. Connect control cable leads to terminal block as recorded on tags.

11. Remove the chain hoist and lifting tool.

12. Replace trim cover on top of vertical column and secure with two hex socket button head
capscrews. Refer to Section 6.

13. Replace horizontal arm. Refer to Section 4-6.

14. Then continue in Section 3-2 to remount x−ray tube and Section 2-3 to remount collimator assembly.

15. Check counterweight balancing. Refer to Section 5-5-3.

5-3 Counterweight Cables

Note: The follower cable should be replaced only if it shows signs of wear or deterioration, and can only be removed

using the procedure in Sections 5-3-5 and 5-3-6.

The main and safety cable should be replaced periodically as defined in the Planned Maintenance section
of the Operator Manual, or where elsewhere directed.

This procedure requires that the FE work at the top of the vertical column.
Ensure proper safety precautions are taken against falls or loss of
balance.

This procedure can result in dropping the counterweight to the bottom of
the column if done incorrectly. If this occurs use the procedure in
Sections 5-3-5 and 5-3-6 to replace the cables and reattach the
counterweight.

1. Set the main power circuit breaker to OFF.

2. Position horizontal arm and tube at least 90 degrees out of park, so that it can be positioned at
lowest possible position.

3. Raise horizontal arm to a comfortable working height.

4. Remove column cap.

5. Remove four binding head screws holding cover plate on the carriage assembly. See Illustration
5−3.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−3

CABLE REPLACEMENT

MAIN
CABLE

CARRIAGE

ASSEMBLY

SAFETY
CABLE

CABLE
STUD
END

SCREW

COVER
PLATE

HOLDING
NUT

FOLLOWER
CABLE

5-3-1 Main Cable

Note: Note the approximate position of the holding nuts on the main and safety cables before removal. Use this as a

reference when reinstalling.

1. Loosen jam nut on top of stud end of main cable. Main cable is in front of follower and to the left of
safety cables.

Sudden and unexpected motion can occur: After next step the
counterweight is held only by the safety cable.

2. Remove holding nut on bottom of stud end of main cable.

3. Remove cable stud from carriage cable mounting strut and remove jam nut from main cable.

4. Move horizontal arm to bottom of column. This raises the counterweight to the top of the column.

35

AMX−4+ SERVICE

UPPER

R-

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−4

COUNTERWEIGHT AND CABLES

PULLEY

MAIN
CABLE

SAFETY
CABLE

CABLE
STUD−END

CABLE
BALL−END

TRIM

WEIGHT

SCREW

RETAINER
CLIP

COUNTE
WEIGHT

front of unit

5. Use 1/4 in. slotted screwdriver to remove screw holding cable retainer clip on the main cable side of
counterweight; loosen other screw and move the retainer clip so that the main keyhole slot is
accessible.

Note: The positioning is awkward and the screw can be easily dropped.

6. Push main cable ball end out from counterweight keyhole slot.

7. Pull main cable ball end through top of column.

8. Remove old cable.

9. Push new main cable ball end through top of column over top of upper pulley and then into
counterweight keyhole slot.

10. Place cable retainer clip back in position and tighten/insert screws.

11. Thread new main cable through back of carriage.

12. Raise vertical arm to comfortable working height.

13. Apply Loctite 242 to the entire length of threads on the cable stud. Install jam nut on cable stud.

14. Install cable stud through carriage horizontal bar and install holding nut.

15. Adjust tension of the main cable until the follower cable tension is in accordance with Section 5−3−4.
Tighten main cable holding nut (main cable jam nut is tightened down after safety cable
replacement).

Note: Do not allow cables to twist while setting tension.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

5-3-2 Safety Cable

1. Loosen jam nut on top of stud end of safety cable.

After next step the counterweight safety mechanism is temporarily inactive
until the new safety cable is installed.

2. Remove holding nut on bottom of stud end of safety cable.

3. Remove cable stud from carriage cable mounting strut and remove jam nut from safety cable.

4. Move horizontal arm to bottom of column. This raises the counterweight to the top of the column.

5. Use 1/4 in. slotted screwdriver to remove screw holding cable retainer clip on the safety cable side
of counterweight; loosen other screw and move the retainer clip so that the safety keyhole slot is
accessible.

Note: The positioning is awkward and the screw can be easily dropped.

6. Push safety cable ball end out from counterweight groove.

7. Pull safety cable ball end through top of column.

8. Remove old safety cable from column.

9. Push new safety cable ball end through top of column over top of upper pulley and then into
counterweight keyhole slot.

10. Place cable retainer clip back in position and tighten/insert screws.

11. Thread new safety cable through back of carriage.

12. Raise vertical arm to comfortable working height.

13. Apply Loctite 242 to the entire length of threads on the cable stud. Install jam nut on cable stud.

14. Install cable stud through carriage horizontal strut and install holding nut.

15. Adjust tension of the safety cable until its tension is in accordance with Section 5−3−4 (may need to
also readjust main cable tension as well). Tighten safety and main cable holding nuts, then safety
cable jam nut, and finally the main cable jam nut.

Note: Do not allow cables to twist while setting tension. Ensure the Loctite 242 was properly used on both the main

and the safety cable studs, and that both jam nuts are tight.

5-3-3 Reassemble Unit

1. Move horizontal arm through full range of motion, ensuring that it moves smoothly with equal force
throughout its range. Ensure that both cables run smoothly through upper pulley.

2. Replace carriage access plate and four binding head screws.

3. Install column cap.

5-3-4 Vertical Column Cable Tension

Tension in the vertical column cables can be measured two ways: when the column is horizontal (as
when replacing the counterweight) or vertical (as when replacing the main and safety cables). Table 5−1
lists the tension values required for the different attitudes.

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AMX−4+ SERVICE

COLUMN ATTITUDE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

TABLE 5−1

VERTICAL COLUMN TENSION

CABLE TENSION

MAIN SAFETY FOLLOWER

HORIZONTAL 60 LB (27 KG) 5−10 LB (2.3−4.5 KG) N/A

VERTICAL N/A 45 − 50 LB (20.4 − 22.7 KG)) 10−15 LB (4.5−6.8 KG)

N/A − Not applicable; value not measured

5-3-5 Remove Follower Cable

If replacement of follower cable is required, all three cables should be replaced to ensure that the periodic
maintenance time interval specified for replacement of the cables remains the same.

Note: Use this procedure for follower cable service, or in the event the procedure in Section 5-3 cannot be success-

fully performed.

1. Remove vertical column from unit. Refer to Section 5−1. Vertical Column removal is necessary in
order to replace a follower cable.

2. Remove cover plate form the carriage assembly by removing four binding head screws holding it in
place. See Illustration 5−5.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−5

CABLE REPLACEMENT

MAIN

UPPER
PULLEY

CABLE

SCREW

MAIN
CABLE

SAFETY
CABLE

CABLE
STUD
END

CABLE
BALL−END

CARRIAGE

ASSEMBLY

SAFETY
CABLE

CABLE
STUD−END

HOLDING
NUT

FOLLOWER
CABLE

COVER
PLATE

3. Move carriage near to bottom of column. This also brings counterweight to top of column where it
can be removed.

4. Loosen locking nuts on top of stud ends of main and safety cables.

5. Remove holding nuts on bottom of stud ends of main and safety cables.

6. Remove cable studs from carriage cable mounting strut.

7. Push ball end of follower cable out of slot in carriage cable mounting strut.

8. Move carriage toward top of column until ball end of follower cable is exposed. Move ball end of
cable to bottom of column.

9. Remove follower cable from lower pulley and leave inside bottom of column.

10. Remove pulley and brake assembly. Refer to Section 5−4.

11. Remove counterweight from top end of column. Refer to Section 5−5.

Note: At this point all three cables are detached from the counterweight and can be removed from the vertical col-

umn assembly.

12. Remove main, safety and follower cables.

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REV 20 DIRECTION 2173225−100

5-3-6 Install Follower Cable

1. Install counterweight assembly. Refer to Section 5-5.

2. Install upper pulley and brake assembly. Refer to Section 5-4-4.

3. Reach in the bottom of the column, retrieve the follower cable (see Illustration 5−5) and position it
around the lower pulley.

4. Place the ball end of the follower cable in the small square cut−out in the column.

5. Align the carriage cable mounting strut over the base end of the follower cable.

6. Place ball end of follower cable in slot on carriage cable mounting strut.

7. Apply Loctite 242 to the entire length of the follower cable stud threads.

8. Replace top locking nuts on stud ends of main and safety cables.

9. Insert main safety cable studs into carriage cable mounting strut holes.

10. Replace holding nuts on bottom of stud ends of main and safety cables. Do not tighten at this time.

11. Make certain all the cables are still in their pulley grooves. (Follower cable is on right side as you
look at it.)

12. Tighten the main cable until there is no slack in the follower cable.

13. Set follower cable to tension value found in Section 5-3-4. Apply Loctite 242 and tighten main cable
jam nut.

14. Re−apply Loctite 242 if necessary and tighten jam nuts.

15. Check that the carriage moves freely up and down the column.

16. Replace cover plate on the carriage assembly and secure with four binding head screws. See
Illustration 5−5.

17. Move carriage to top of column. This moves counterweight to bottom of column.

18. Install vertical column. Refer to Section 5-2.

5-4 Upper Brake, Pulley, and Bearings

5-4-1 Disconnect Brake

1. Remove the vertical column. Refer to Section 5-1.

2. Tag either the main or safety cable. This will eliminate confusion when securing them in their correct
positions on the carriage mounting strut.

3. Detach the main and safety cables from the carriage cable mounting strut. Refer to Section 5-3.

4. Remove two screws in the bottom of terminal box located on back of vertical column and lift off
cover.

5. Disconnect upper brake cable leads from terminal block. (It is important to tag and record terminal
points, otherwise there is a possibility of blowing internal diode in brake if leads are improperly
installed.)

6. Remove brake cable from terminal box and channel on back of column.

5-4-2 Remove Upper Pulley and Brake

1. Remove capscrews securing pulley and brake assembly to top of column. See Illustration 5−6.

2. Remove Heyco bushing from column where brake cable enters pulley and brake assembly. Bushing
extends into pulley and brake casting.

40

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−6

UPPER PULLEY AND
BRAKE ASSEMBLY

PULLEY AND

UPPER
BRAKE

UPPER
BRAKE
CABLE

BUSHING

VERTICAL
COLUMN

BRAKE ASSEMBLY

CAPSCREW

3. Slowly withdraw pulley and brake assembly from top of column while sliding the brake cable through
slot in top of column. These must be done together or the brake cable will be severed.

4. Pull main and safety cables from the column.

5. Remove the nuts from the stud ends of both cables.

6. Remove each cable from the pulley and brake assembly by first lifting it from its pulley groove,
moving it to the side of the pulley and then pulling it free. The ball ends of these cables still remain
attached to counterweight.

7. Remove the pulley and brake assembly.

5-4-3 Replace Upper Pulley and Bearings

1. Remove upper pulley and brake. Refer to Sections 5-4-1 and 5-4-2.

2. Place a tag on either the main cable or safety cable. This will aid in re-installing them later in their
correct positions.

3. Remove pulley set screws. See Illustration 5−7.

41

AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−7

UPPER BRAKE AND PULLEY

SCREW

KEY

UPPER
BRAKE

PULLEY

SET
SCREW

PULLEY
SHAFT

BEARING

MOUNTING
BRACKET

BEARING

RETAINING
RING

VERTICAL
COLUMN

4. Remove retaining ring from end of pulley shaft.

5. Remove pulley shaft bearing, key, pulley and cables from mounting bracket.

6. Remove bearing from mounting bracket.

7. Place bearing on pulley shaft and insert key.

8. Place pulley in position in the mounting bracket.

9. Insert pulley shaft, bearing and key into mounting bracket and through pulley.

10. Place bearing in mounting bracket on end of pulley shaft.

11. Place retaining ring on end of pulley shaft.

12. Replace pulley set screws and secure firmly.

5-4-4 Install Upper Pulley, Bearings and Brake

1. Place pulley and brake assembly near upper end of vertical column. See Illustration 5−6.

2. Remove the nuts from the stud ends of main and safety cables.

3. Insert each cable into pulley and brake assembly along the side of the pulley then lift it into its
assigned pulley groove. The ball ends of these cables are attached to the counterweight.

4. Insert main and safety cables into the column through slot provided.

5. Check that the brake cable is exiting pulley and brake assembly through hole in casting.

6. Replace pulley and brake assembly in top of column while sliding the brake cable through slot in top
of column. This must be done together or the brake cable may be damaged.

7. Replace the Heyco bushing in column where brake cable passes through column and enters pulley
and brake assembly. Bushing extends into pulley and brake casting.

CAPSCREW

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REV 20 DIRECTION 2173225−100

Note: Torque cap screws to 50−70 pound−inches (5.6 to 7.8 N−m).

8. Apply Loctite and replace cap screws securing pulley and brake assembly to top of column.

5-4-5 Connect Brake

1. Insert brake cable through top of channel on back of column and down into terminal box.

2. Connect upper brake cable leads to terminal block. See Illustration 5−2.

3. Replace terminal box cover located on back of vertical column and secure with two screws.

4. Install main and safety cables on the carriage cable mounting strut. Refer to Section 5−2.

5. Install vertical column. Refer to Section 5-4.

5-4-6 Remove Upper Pulley, Bearings and Brake (Alternate)

Note: This procedure can be used to replace the brake without removing the vertical column

1. Remove horizontal arm. Refer to Section 4-5. It is not necessary to remove yoke from arm.

2. Disconnect upper brake. Refer to Section 5-4-1.

3. Disconnect main and safety cables from carriage. Refer to Section 5-6.

4. Move carriage to bottom of column.

5. Remove four capscrews securing pulley and brake assembly to top of column.

6. Remove the Heyco bushing in column where brake cable passes through column and enters pulley
and brake assembly. Bushing extends into pulley and brake casting.

7. Remove pulley and brake assembly from top of column while sliding the brake cable through slot in
top of column. This must be done together or the brake cable may be damaged.

8. Remove screws holding upper brake to the mounting bracket.

5-4-7 Install Upper Pulley, Bearings and Brake (Alternate)

Note: This procedure can be used in conjunction with Section 5-4-6.

1. Insert screws holding upper brake to the pulley and brake assembly casting and secure in place.

2. Check that the brake cable is exiting pulley and brake assembly through hole in casting.

3. Replace pulley and brake assembly in top of column while sliding the brake cable through slot in top
of column. This must be done together or the brake cable may be damaged.

4. Replace the Heyco bushing in column where brake cable passes through column and enters pulley
and brake assembly. Bushing extends into pulley and brake casting.

Note: Torque cap screws to 50−70 pound−inches (5.6 to 7.8 N−m).

5. Apply Loctite and replace capscrews securing pulley and brake assembly to top of column.

6. Connect brake. Refer to Section 5-4-5.

7. Apply Loctite 242 to the entire thread length of each cable stud.

8. Move carriage to top of column and insert main and safety cables in carriage cable mounting strut.
See Illustration 5−8.

43

AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−8

CARRIAGE ASSEMBLY

SAFETY
MAIN
CABLE

FOLLOWER
CABLE

CABLE

CABLE
STUD−END

HOLDING
NUT

9. Tighten the main and safety cable stud end nuts and lock in place with the holding nuts.

10. Set cable tension in accordance with Section 5-3-4. Tighten cable jam nuts.

11. Replace cover plate on the carriage assembly and secure with four binding head screws. See
Illustration 5−5.

12. Replace horizontal arm with yoke. Refer to Section 4-6.

5-5 Counterweight

5-5-1 Remove Counterweight

1. Remove vertical column. Refer to Section 5-1.

2. Remove the main, safety and follower cables. Refer to Section 5-3.

3. Remove upper pulley and brake assembly. Refer to Section 5-4.

PERSONAL INJURY! THE COUNTERWEIGHT WEIGHS APPROXIMATELY
100 POUNDS (45 KG). USE THE PROPER SAFETY PRECAUTIONS WHEN
HANDLING THE COUNTERWEIGHTS.

4. Slide counterweight from vertical column.

5. Remove top cable retainer clip from counterweight assembly by removing two slotted hex washer
head screws. See Illustration 5−9.

44

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 5−9

COUNTERWEIGHT

STUD
ENDS

SCREW

RETAINER
CLIP

RETAINER
CLIP

SCREW

MAIN AND SAFETY CABLES

COUNTERWEIGHT

BALL
ENDS

FOLLOWER
CABLE

6. Remove main and safety cables from counterweight assembly by dislodging ball ends of cables from
retaining notch in counterweight.

7. Remove bottom follower cable retainer clip from counterweight assembly by removing two slotted
hex washer head capscrews.

8. Remove follower cable form counterweight assembly by dislodging ball end of cable from retaining
notch in counterweight.

5-5-2 Install Counterweight

1. Replace main and safety cables in counterweight assembly by inserting ball ends of cables into
retaining notch in top of counterweight. See Illustration 5−9.

2. Replace cable retainer clip in top of counterweight assembly and secure with two slotted hex washer
capscrews.

3. Place follower cable ball end into retaining notch in bottom of counterweight. The follower cable
must be installed on the right side to function properly.

4. Replace follower cable retainer clip in bottom of counterweight assembly and secure with two slotted
hex washer head capscrews.

5. Slide follower cable down inside of vertical column as far as possible.

6. Slide counterweight assembly into vertical column.

7. Check counterweight balancing. Refer to Section 5-5-3.

5-5-3 Counterweight Balancing

Note: The column assembly trim cover must be removed from top of column assembly as shown in Section 5-1.

45

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

1. Secure the collimator hand switch closed with a ty-wrap or piece of tape to energize the vertical
column brake (as well as all other brakes and latch solenoid).

2. With all hardware in place, check the force required to move the tube/arm assembly upward and
downward. If the force needed to move it up is equal to the force needed to move it down, the
vertical column is balanced. Proceed to Step 5.

3. If the vertical moving forces are unequal, eight oz. (0.23 kg) counterweights (part number
46−279784P1) should be added or removed (approximately four are installed at the factory).

a. Move the tube/arm to its lowest possible position. This will raise the counterpoise mass and counter-

weight to the top of the vertical column where the counterweight can be accessed.
b. Loosen and remove the two locknuts and washers that hold the counterweights to the counterpoise.
c. Add or remove counterweights as required,
d. Replace the washers and locknuts, and tighten locknuts.

4. Repeat Step 2. If the moving forces are equal, proceed to Step 5. If they are still unequal, repeat Step 3.

5. Replace trim cover on top of vertical column and secure with two hex socket button head capscrews.

5-6 Carriage Assembly

5-6-1 Remove Carriage

1. Remove upper pulley and brake assembly. Refer to Section 5-4.

2. Remove follower cable end from carriage strut by loosening its holding nut. See Illustration 5−10.

3. Slide carriage to top of column and remove it.

ILLUSTRATION 5−10

CARRIAGE ASSEMBLY

MAIN
CABLE

CABLE
STUD−END

HOLDING
NUT

FOLLOWER
CABLE

5-6-2 Install Carriage

1. Slide carriage assembly into top of column. Check that horizontal arm mounting plate is at top of
carriage.

2. Install pulley and brake assembly. Refer to Section 5-4-4.

3. Apply Loctite 242 to the entire length of the follower cable stud threads.

4. Place follower cable end into carriage strut and secure in place by tightening its holding nut. See
Illustration 5−10.

SAFETY
CABLE

46

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

5-6-3 Remove Carriage Bearings

1. Remove carriage assembly. Refer to Section 5-6-1.

2. Remove four hex head shoulder bolts securing four forward facing bearings to side flanges on
carriage. See Illustration 5−11.

3. Remove carriage side facing bearing shoulder bolts and bearings from carriage.

ILLUSTRATION 5−11

CARRIAGE BEARINGS

G3 CARRIAGE
ASSEMBLY

RUBBER
BUMPER

SPACER

BEARING

SHOULDER BOLT

5-6-4 Install Carriage Bearings

1. Lubricate bearings if necessary.

2. Attach four forward facing bearings to carriage mounting flanges with hex head shoulder bolts. See
Illustration 5−11. Apply Loctite and torque to 40−60 pound−inches (4.5 to 6.7 N−m)

3. Install side facing bearings at mounting locations on each side of carriage with shoulder bolts.

4. Install carriage assembly in vertical column assembly. Refer to Section 5-6-2.

SHOULDER BOLT

WASHER

BEARING

47

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

5-7 Lower Brake Removal

1. Remove vertical column. Refer to Section 5-1.

2. Remove retaining ring from bottom of column base shaft. See Illustration 5−12.

ILLUSTRATION 5−12

LOWER BRAKE AND BEARINGS

COLUMN BASE

COLUMN BASE SHAFT

KEY

SCREW

STOP DISK

UPPER COLUMN BEARING

SLEEVE

LOWER BRAKE

LOWER COLUMN BEARING

RETAINING RING

CAP SCREW

LOCK WASHER

270 DEG. DETENT RING

COLUMN BEARING PLATE

SCREW

3. Pull lower column bearing from column base shaft.

4. Remove screws and washers securing lower brake to column bearing plate.

5. Remove lower brake from column base shaft.

5-8 Lower Bearings and Baseplate Removal

1. Remove vertical column. Refer to Section 5-1.

2. Remove lower brake. Refer to Section 5-7.

3. Remove sleeve and key from column base shaft.

4. Remove upper column bearing and column bearing plate from column base shaft.

48

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

Note: It is not normally necessary to take the column bearing plate apart, but the stop disk can come out of its posi-

tion in the detent ring.

5-9 Lower Brake and Bearings Installation

Note: Install stop disk in column bearing plate if it has come out.

1. Install upper column bearing in column bearing plate. See Illustration 5−12.

2. Place column bearing plate on column base shaft. Ensure that column bearing plate sits flat on
bottom of column.

3. Install sleeve and key on column base shaft.

4. Place lower brake on column base shaft.

5. Secure lower brake to bearing plate with screws and washers. Torque to 40−60 pound−inches (4.5
to 6.7 N−m).

6. Slide lower bearing on column base shaft and secure with retaining ring.

7. Install vertical column assembly. Refer to Section 5-2.

5-10 Column Base Removal

1. Remove vertical column assembly. Refer to Section 5-1.

2. Remove follower cable. Refer to Section 5-3-5.

3. Remove lower brake and bearings. Refer to Section 5-9.

4. Remove hex head bolt and flat washers securing column base assembly to vertical column. See
Illustration 5−13.

ILLUSTRATION 5−13

COLUMN BASE

5. Pull column base assembly and spacers from vertical column.

49

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

5-11 Column Base Installation

1. Insert column base assembly into vertical column. Line up holes with those in vertical column. See
Illustration 5−13.

2. Position spacers so that holes line up with column base and column.

3. Apply Loctite to the hex head bolts. Secure column base assembly to vertical column with bolts and
flat washers. Torque bolts to 30−35 pound−feet (41 to 47 N−m).

4. Install lower brake and bearings. Refer to Section 5-9.

5. Install follower cable. Refer to Section 5-3-6.

6. Install vertical column assembly. Refer to Section 5-2.

5-12 Lower Pulley and Bearings Removal

1. Remove column base. Refer to Section 5-10.

2. Loosen two set screws on pulley hub. See Illustration 5−14.

ILLUSTRATION 5−14

LOWER PULLEY AND BEARINGS

SET SCREW

PULLEY

RETAINING RING

BEARING

COLUMN
BASE

3. Remove external retaining rings from pulley ends of pulley shaft.

4. Pull out shaft and remove pulley.

5. Remove bearings from column base casting.

5-13 Lower Pulley and Bearings Installation

1. Insert bearings in bearing seats in column base casting. See Illustration 5−14.

2. Push pulley shaft through left bearing. Slide pulley on shaft with pulley hub toward right bearing.

3. Insert pulley shaft in right bearing and secure shaft with one external retaining ring in groove on
each end of shaft.

4. Tighten two set screws on pulley hub.

5. Install column base. Refer to Section 5-2.

PULLEY SHAFT

BEARING

RETAINING RING

50

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

5-14 Column Support Assembly Removal

1. Remove vertical column assembly. Refer to Section 5-1.

2. From beneath the bare assembly, remove capscrews and washers securing column support to
bottom of base assembly. See Illustration 5−15.

ILLUSTRATION 5−15

COLUMN SUPPORT ASSEMBLY

CAPSCREWS(8)
LOCK WASHERS(8)
FLA T WASHERS(8)
Torque to 100−120 lb. ins.
(11.2 to 13.4 N−m)

COLUMN SUPPORT

BASE ASSEMBLY

3. Remove hex head capscrews, lockwashers and flat washers securing the column support to the
base assembly.

4. Remove column support from base assembly.

5-15 Column Support Assembly Installation

1. Place column support in base assembly. Orient opening in side of column support so it is opposite
terminal board in base assembly. Line up mounting holes. See Illustration 5−15.

2. Secure the column support to the base assembly with hex head capscrews, lockwashers and flat
washers. Torque to 100−120 pound−inches (11.2 to 13.4 N−m).

3. Secure bottom of column support to bottom of front tongue in base assembly with cap screws and
washers. Torque to 100−120 pound−inches (11.2 to 13.4 N−m).

4. Install vertical column assembly. Refer to Section 5-2.

LOCKWASHERS (4)
CAPSCREWS(4)
Torque to 100−120 lb. ins.
(11.2 to 13.4 N−m)

51

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

SECTION 6 − SERVICING THE CASSETTE DRAWER, COVERS,
HORIZONTAL ARM LATCH AND HANDSWITCH

This section provides procedures covering the removal and installation of trim covers.

6-1 Cassette Drawer Removal

1. Remove rear cover from unit by removing two screws securing it to base assembly. See Illustration
6−1.

2. Remove five binding head screws and flat washers securing cassette drawer hinge to base
assembly.

3. Pull cassette drawer to open position. It is retained by magnetic catch. Lift drawer up and out of
base assembly.

ILLUSTRATION 6−1

CASSETTE DRAWER

HANDLE

CASSETTE
DRAWER

SCREWS

SCREWS (2)

REAR COVER

6-2 Cassette Drawer Installation

1. Place cassette drawer in position on base assembly.

2. Attach cassette drawer hinge to base with five binding head screws and flat washers.

3. Install rear cover to base assembly with two screws.

4. Close cassette drawer. Magnetic catch will hold it in its place.

6-3 Cassette Drawer IEC Finger Pinch Label Installation

1. If replacing the cassette drawer, please ensure you have ordered a replacement warning label (part
number 5291366) for the drawer handle.

2. Attach the label to the handle of the cassette drawer.

BASE ASSEMBLY

52

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

6-4 Side Covers Removal

Note: This procedure covers the removal of both the right and left trim covers.

1. Turn power off by turning circuit breaker OFF.

2. Remove front cover from unit by pulling corners of cover from ball stud retainer sockets on
mainframe. See Illustration 6−2.

3. Remove rear cover by removing two screws retaining it on base assembly.

4. Disconnect hand switch on right side trim cover.

5. Remove two 4−40 x 3/8 inch binding head screws and one 6−32 x 1/2 inch black oxide binding head
screw holding each cover to base and mainframe assemblies.

6. Pull covers loose from five ball stud retaining sockets and carefully remove from unit.

ILLUSTRATION 6−2

SIDE COVERS

HAND SWITCH

RIGHT COVER

6−32 X 1/2 BLACK
OXIDE SCREW

FRONT COVER

BALL STUDS

BALL STUDS

BATTERY CHARGE WARNING LABEL

4−40 x 3/8
SCREWS

BATTERY COMPARTMENT COVER
SCREWS TOP AND BOTTOM

4−40 x 3/8
SCREWS

LEFT COVER

6−32 X 1/2 BLACK
OXIDE SCREW

6-5 Side Cover Installation

1. Turn power off by turning circuit breaker OFF.

Note: This procedure covers the installation of both the right and left trim covers.

2. Install side covers by first pressing the five ball studs into retainer sockets on base and mainframe
assemblies. See Illustration 6−2.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

3. Secure each side cover to base and mainframe assemblies with two 4−40 x 3/8 inch binding head
screws and one 6−32 x 1/2 inch black oxide binding head screw.

4. Connect handswitch on right side trim cover.

5. Install rear cover with two screws.

6. Install front cover on unit by pressing ball studs on corners of cover into retainer sockets.

6-6 Battery Charging Warning Label

1. If replacing the side covers, or performing a new installation in a non−English speaking country,
please ensure you have ordered a replacement warning label for the side cover:

> Order 46−279022P1 for English or
> Order 5407496 for all other languages

Note: If this is a new installation, the label is provided in a kit with the system.

2. Place the label as shown in Illustration 6−2.

6-7 Top Cover Removal

1. Move horizontal arm to top of column.

2. Turn power off by turning circuit breaker OFF.

3. Open cassette drawer, reach up into top cover and rotate two spring latches to release cover from
the mainframe.

4. Remove three hex socket capscrews holding collar to horizontal arm latch and lift off collar and
spacer beneath it. See Illustration 6−3.

ILLUSTRATION 6−3

TOP COVER

COLLAR

CAP SCREW

TOP COVER

SCREW

SPRING LATCH

WASHER

SCREW

SPACER

BRACKET

SCREW

HINGE

5. Lift top cover straight up until right and left hinges lock in vertical position.

54

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

Note: With top cover extended on hinges, the cover can be tilted toward the front or rear of the unit to provide access

to either area for servicing. If complete removal of the cover is necessary then continue with steps 5 through 9.

6. Disconnect wires from key switch assembly.

7. Disconnect ribbon cable from display at printed wire board.

8. Remove the shouldered screws holding the right and left hinges to the top cover brackets.

9. Remove the top cover.

6-8 Top Cover Installation

1. Move horizontal arm to top of column.

2. Turn power off by turning circuit breaker OFF.

3. Extend right and left hinges from mainframe to vertical position. See Illustration 6−3.

4. Lift top cover and position brackets on hinges.

5. Secure top cover brackets to right and left hinges with two shouldered screws.

6. Connect ribbon cable from display to printed wire board.

7. Connect wires to key switch assembly.

8. Carefully lower cover into position on top of mainframe.

9. Open cassette drawer, reach up into top cover and rotate two spring latches to lock cover to
mainframe.

10. Place spacer and collar on horizontal arm latch and secure collar in place with three hex socket
capscrews.

55

AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

6-9 Top Cover X−ray Warning Label

1. If replacing the top cover, or performing a new installation in a non−English speaking country, please
ensure you have ordered a replacement warning label for the top cover (kit part number 5407496).

Note: If this is a new installation, the label is provided in a kit with the system.

2. Place the label on the top cover over the existing English label.

3. For systems installed in Canada, attach the additional X−ray warning label (5407273) to the top
cover as shown in Illustration 5−16.

ILLUSTRATION 5−16

APPLY CANADIAN X−RAY W AR NING LABE L 540 7273

6-10 Remove Latch Assembly and Components (Hall Effect Switch)

1. Move horizontal arm out of the way.

2. Shut power off by turning circuit breaker OFF.

3. Open top cover. Refer to Section 6-7.

Note: If you need more access to terminal strip, you may remove four hex nuts attaching low voltage power supply to

mainframe and slide power supply backward out of mainframe housing. See Illustration 6−4.

56

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 6−4

LATCH ASSEMBLY (HALL EFFECT LATCH SWITCH)

LATCH

LATCH SPRING

BINDING HEAD
SCREW

(2) BUMPER

FURNISHED WITH
SOLENOID

LATCH BLOCK

TERMINAL STRIP

LOW
VOLTAGE SUPPLY

HEX NUT

BUMPER

SOLENOID

(4) HEX SOCKET
CAPSCREWS

SPRING PIN

SPACER

MAINFRAME

4. Disconnect leads from terminal strip (see Illustration 6−5):
> Sensor Board: three leads to quick disconnect connectors. (#1, #2 and #3).
> Solenoid: two leads to terminal strip. Tag and label terminals. Must reconnect properly on #3 &

#4 or will blow diode in solenoid.

57

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 6−5

LATCH WIRING

26 (REF)
BEND SPRING
AS SHOWN

RED FROM SOLENOID (P27)

BLK FROM SOLENOID (P27)

BLUE FROM SWITCH (P96) TO #1

BLU LEAD MARKED 1
(FROM HARNESS P16)

BLK LEAD MARKED 2
(FROM HARNESS P16)

BLK LEAD MARKED 3
(FROM HARNESS P16)

WHITE LEAD MARKED 4
(FROM HARNESS P16)

YELLOW FROM SWITCH (P96) TO #2

BLACK FROM SWITCH (P96) TO #3

TERMINAL STRIP

5. Remove latch assembly from mainframe by removing four hex socket head capscrews.

6. Remove latch block from spacer by removing four hex socket head capscrews.

7. Push spring pin out of latch block.

8. Remove latch.

9. Remove latch spring by removing binding head screw.

10. Remove hex nut from top of solenoid.

11. Remove solenoid from recess in latch block.

12. Remove the two flat head screws in side of latch base.

Use care to avoid electrostatic discharge damage to the Hall effect sensor
circuit board.

13. Remove the cover and the Hall effect sensor circuit board.

6-11 Install Latch Assembly and Components (Hall Effect Switch)

1. Shut off power by turning circuit breaker OFF.

2. Install solenoid in recess in latch block. See Illustration 6−4.

3. Install hex nut on top of solenoid.

Use care to avoid electrostatic discharge damage to the Hall effect sensor
circuit board.

4. Install Hall effect sensor circuit board and cover with two flat head screws.

5. Attach latch spring to latch with binding head screw.

6. Install latch in latch block.

7. Insert spring pin in latch block to retain latch in position.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

8. Install latch block on spacer and fasten with four hex socket head capscrews.

9. Install latch assembly on mainframe and fasten with four hex socket head capscrews.

10. Connect leads from latch assembly:
> Hall Effect Sensor Board: three leads to terminal strip #1, #2 and #3.
> Solenoid: two leads to terminal strip in accordance with labels on terminals.

11. If you moved low voltage power supply out of the way in Section 6-10, slide power supply onto
mainframe housing and fasten with four hex nuts.

12. Close top cover. Refer to Section 6-8.

6-12 Remove And Install Hand Switch Cable

To remove the hand switch cable

1. Disconnect the cable from the connector on the body of the AMX−4+.

2. Remove the 6−32 screw securing the cable clamp, then remove the clamp and star washer.

To install the hand switch cable, perform the above steps in reverse order. Be sure to align the cable to
the cover as indicated in Illustration 6−6.

ILLUSTRATION 6−6

HAND SWITCH CABLE

LINE CABLE UP
PARALLEL T O EDGE
OF COVER BEFORE
TIGHTENING DOWN
CLAMP

6-13 Install Hand Switch

1. Plug end of coil cord into X−Ray Hand Switch. See Illustration 6−7.

2. Place X−Ray Hand Switch on support bracket.

RIGHT SIDE COVER

STAR
WASHER

P CLAMP HANDSWITCH LABEL

6−32 SCREW

COIL CORD

59

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 6−7

X−RAY HAND SWITCH

RIGHT SIDE

COVER

SUPPORT
BRACKET

CASSETTE STORAGE

DRAWER

X-RAY

HAND SWITCH

60

AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

SECTION 7 − SERVICING THE BATTERIES

PERSONAL INJURY ! REMOVE ALL JEWELRY AND RINGS WHEN
HANDLING THE BATTERIES OR REACHING IN THE BATTERY
COMPARTMENT. USE EXTREME CAUTION, HIGH AMPERAGE AND
VOLTAGE IS PRESENT. USE INSULATED TOOLS FOR WORKING ON
BATTERIES. WEAR SAFETY GLASSES.

During removal:

− References to the right and left sides of battery compartment are relative to the view shown in
Illustration 7−1.

− Cable numbers (#s) indicated in Illustration 7−3 and in this instruction are marked on the parts.

− Insulator numbers are shown for convenience in description, but are not marked on the parts.

− There are no Insulators #3 and #7.

− Battery numbers may or may not be marked on batteries. Mark batteries with numbers if desired.

− Disconnect cables only in the order instructed, and only when instructed.

− Don’t remove paper backing from any insulating separator pad.

Note: Some battery cable leads may not have boots as referred to in the following procedure.

7-1 Remove Battery Cover

1. Place the unit on a level floor. Extend the horizontal arm and rotate it to the front end (vertical
column end) of the unit. See Illustration 7−1.

Note: Distribution of weight is necessary to remove the battery compartment cover.

ILLUSTRATION 7−1

BATTERY COMPARTMENT ACCESS

CIRCUIT
BREAKER

CABLE MARKED #4

BATTERY
GROUND STUD

CABLE MARKED #2

BASE ASSEMBLY

BATTERY
COMPARTMENT

COVER CAPSCREWS

2. Verify that AMX key switch is OFF, circuit breaker is OFF, and charger cord is unplugged.

3. Remove battery ground cable marked #2 from the ground stud. Tape to ensure it does not short.
SEPARATE IT FROM ALL OTHER CABLES.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

Note: All battery lead connectors must be insulated to prevent electrical contact with the frame or other battery ter-

minals.

4. Tape cable marked #5 separately from ALL other cables.

5. Remove all remaining cables from ground stud. See Illustration 7−1. Tape each cable separately.
Keep ALL cables separate.

6. Remove battery lead cable marked #4 from terminal on Circuit Breaker in AMX1 A3 Module. Be
certain boot covers the connector and it cannot short out. Tape connector to ensure it will not short.

7. Remove battery compartment cover capscrews and cover.

8. Remove insulator board from compartment entrance.

7-2 Disconnect Battery Sense Harness (If Required)

1. If unit has a battery sense harness, disconnect harness from J11 of the battery test terminal strip.
See Illustration 7−2.

2. Disconnect sense leads from J9 and J10 on left hand side of the battery test terminal strip.

ILLUSTRATION 7−2

SENSE LEADS ON BATTERY TEST TERMINAL STRIP (46−321370G1)

PRINTED WIRING BD ASM
46−321370G1

CABLE #7
SENSE LEAD

CABLE #1
SENSE
LEAD

(J6)

(J5)

CABLE #8
SENSE LEAD

CABLE #3
SENSE LEAD

(J2)

(J4)

CABLE #1
SENSE LEAD

CABLE #7
SENSE LEAD

(J7)
(J8)

CABLE #2
SENSE LEAD

CABLE #4
SENSE LEAD

(J1)

(J3)

CABLE #5
SENSE LEAD

CABLE #6
SENSE LEAD

BATTERY SENSE
HARNESS
(IF PRESENT)
CONNECTS TO J11

(J11)

(J10)

(J9)

7-3 Disconnect and Remove Batteries

1. Disconnect Cable #2 from Battery #9 (−) and slide boot over cable terminal. See Illustration 7−3.

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2. Disconnect Cable #5 from Battery #9 (+), and slide boot over cable terminal.

3. Remove Battery #9, Insulator #8, and Insulator #1 in front of Batteries #7 and #8.

4. Disconnect sense leads from J7 and J8 on left side of battery test terminal strip.

5. Disconnect Cable #3 from Battery #7 (+) and slide boot over cable terminal.

6. Disconnect Cable #5 from Battery #8 (−) and slide boot over cable terminal.

7. Disconnect one of the Cable #1s from Battery #7 (−) and Battery #8 (+), and slide a boot over each
cable terminal.

8. Remove Batteries #7 and #8 and the separator pad between them.

9. Remove the remaining Insulator #1.

63

AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

ILLUSTRATION 7−3

BATTERY CONNECTIONS

CABLE 7
SENSE LEAD

CABLE 7 (2)

SEE NOTE 2

CABLE 4
SENSE LEAD

CABLE 4 TO
CIRCUIT BREAKER

BATTERY SEPARATOR PAD
TYPICAL (4 PLACES)

SEE NOTE 3

CABLE 6

CABLE 8

CABLE 1
SENSE LEAD

CABLE 7

5

SENSE LEAD

CABLE 1

CABLE 3

CABLE 3
SENSE LEAD

SEE
NOTE 2

SEE
NOTE 2

CABLE 1

CABLE 1
SENSE LEAD

CABLE 2
SENSE LEAD

NOTE 1: THERE ARE NO INSULATORS #3 & #7.

NOTE 2: DON’T CONFUSE INSULATOR #4 WITH INSULATOR #1. INSULATOR #4 HAS TWO

NON−FUNCTIONAL HOLES. INSULATOR #1 HAS TWO CUP−SHAPED BUMPS WITH NO HOLES.
INSULATOR #1 MUST BE ORIENTED WITH BUMPS POINTING AWA Y FROM YOU.

NOTE 3: ADD BATTERY SEPARATOR PADS BETWEEN BATTERIES 1 & 3, 2 & 4, 5 & 6, AND 7 & 8.
DON’T REMOVE PAPER BACKING FROM BATTER Y SEPARATOR PADS. ORIENT PADS WITH
PAPER BACKING FACING UP.

CABLE 6
SENSE LEAD

BATTERY TEST
TERMNAL STRIP

CABLE 5

CABLE 5
SENSE LEAD

SEE NOTE 2

CABLE 2
TO GROUND STUD

64

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

7-4 Disconnect and Remove Battery Test Terminal Strip

1. Disconnect sense leads from J5 and J6 on left side of battery test terminal strip, and J1, J2, J3 and
J4 from right side.

2. Remove battery test terminal strip from battery compartment.

7-5 Continue Battery Disconnection/Removal

1. Disconnect Cable #8 from Battery #5 (+) and slide boot over cable terminal.

2. Disconnect Cable #3 from Battery #6 (−) and slide boot over cable terminal.

3. Disconnect remaining Cable #1 from Battery #6(+) and Battery #5 (−) and slide boot over each cable
terminal.

4. Remove Batteries #5 and #6 and the separator pad between them.

5. Remove Insulator #5, #6, and Insulator #2 behind Batteries #5 and #6.

6. Disconnect Cable #4 from Terminal #4 of circuit breaker in AMX1 A3 and slide boot over cable
terminal. Disconnect other end of Cable #4 from Battery #1 (+) and slide boot over cable terminal.

7. Disconnect Cable #8 from Battery #4 (−) and slide boot over cable terminal.

8. Disconnect one of the Cable #7s from Battery #1 (−) and Battery #2 (+) and slide a boot over each
cable terminal.

9. Disconnect the other Cable #7 from Battery #3 (−) and Battery #4 (+) and slide a boot over each
cable terminal.

10. Disconnect Cable #6 from Battery #2 (−) and Battery #3 (+) and slide a boot over each cable
terminal.

11. Remove Insulator #4 and the two remaining Insulator #2s.

12. Remove the four remaining batteries and battery separator pads.

7-6 Install Panasonic Batteries with Sense Board 2334738−2

PERSONAL INJURY ! REMOVE ALL JEWELRY AND RINGS WHEN
HANDLING THE BATTERIES OR REACHING IN THE BATTERY
COMPARTMENT. USE EXTREME CAUTION, HIGH AMPERAGE AND
VOLTAGE IS PRESENT. USE INSULATED TOOLS FOR WORKING ON
BATTERIES.

EQUIPMENT DAMAGE!

WARNING

Note: During installation:

DO NOT MIX AND MATCH HAWKER AND PANASONIC BATTERIES
BECAUSE OF IMPEDANCE DIFFERENCES BETWEEN THE TWO DIF­FERENT TYPES OF BATTERIES.

D Before starting to install batteries, be sure that the AMX key switch is

OFF, that the circuit breaker is OFF, and the charger cord is unplugged.

D Make all battery connections as shown in Illustrations 7−4 and 7−5 us-

ing the hardware shown.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

D Reference to the right and left sides of battery compartment are relative

to the view shown in Illustration 7−1.

D Cable numbers (#s) indicated in Illustration 7−5 and in this instruction

are marked on the parts.

D Insulator numbers are shown for convenience in description, but are not

marked on the parts.

D There are no Insulators #3 and #7.
D Battery #s are not marked on batteries.
D Be sure that battery compartment top and bottom insulation from the

previous set of batteries is in place.

D Connect cables only in the order instructed, and only when instructed.
D Apply 45−50 pound−inches (5.1−5.6 N−m) torque to ALL battery con-

nections.

D Place insulation boots over ends of each cable that has a boot.
D Don’t remove paper backing from any insulating separator pad. Orient

insulator pads with paper backing facing up.

66

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

1. Do not install install terminal plates on each battery. See Illustration 7−4.

EQUIPMENT DAMAGE!

WARNING

DO NOT MIX AND MATCH HAWKER AND PANASONIC BATTERIES
BECAUSE OF IMPEDANCE DIFFERENCES BETWEEN THE TWO DIF­FERENT TYPES OF BATTERIES.

EQUIPMENT DAMAGE!

WARNING

MAKE SURE TO INSTALL BATTERIES AS PICTURED WITH THE
POSTS ON THE BOTTOM. THIS ENSURES THAT THE BATTERY PO­LARITY IS CORRECT.

2. Position Batteries #2 & #3 (see Illustration 7−5) in the battery compartment
stacked one on top of the other, with a battery separator pad between them.

3. Install Label #1 between Battery #2 (−) and Batery #3 (+) and route as shown
in Illustration 7−5. Connect Brown sense wire under Lead #1 and connect to
Battery #2 (−) as shown.

4. Install Lead #1 to Battery #2 (+) and tighten with Lead pointing UP.

5. Install another Lead #1 to Battery #3 (−) and tighten with Lead pointing DOWN.

MAKE SURE LEAD #1 TO BATTERY # 2 (+) AND LEAD #1 T O BATTERY

WARNING

ILLUSTRATION 7−4

INSTALLATION OF TERMINALS
ON PANASONIC BATTERIES (2278932)

WARNING: EQUIPMENT DAMAGE! MAKE SURE TO
INST ALL
BATTERIES AS PICTURED WITH THE POSTS ON THE
BOTTOM. THIS ENSURES THAT THE BATTERY POLAR­ITY IS CORRECT.

NOTE: TORQUE TO 45−50

IN−LBS
(5.1−5.6 N-m) ON ALL
BATTERY CONNECTIONS.

#3 (−) DO NOT TOUCH.

M5 HEX NUT
(FURNISHED WITH
BATTERY)

M6 LOCKWASHER
(FURNISHED WITH
KIT)

67

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 7−5

INST ALLATION OF BATTERIES IN BATTERY COMPARTMENT WITH SENSE BOARD 2334738−2

BATTERY
SEPARATOR
PAD, P276
TYPICAL
(4 PLACES)

SEE NOTE 3.

SEE
NOTE 2.

15
6

SEE
NOTE 2.

SEE
NOTE 4.

SEE
NOTE 2.

NOTE 1: THERE ARE NO INSULATORS #3 & #7
NOTE 2: DON’T CONFUSE INSULATOR #4 WITH THE INSULATOR #1’S.

INSULATOR #4 HAS TWO NON-FUNCTIONAL HOLES. INSULATOR #1’S EACH HAVE
TWO FULL CUP−SHAPED BUMPS WITH NO HOLES. THE INSULAT OR #1’S MUST BE
ORIENTED WITH BUMPS POINTING AWAY FROM YOU.

NOTE 3: ADD BATTERY SEP ARATOR PADS BETWEEN BATTERIES 1 & 3, 2 & 4, 5 & 6,
AND 7 & 8 WITH RUBBER SIDE DOWN AND PAPER SIDE UP. DO NOT REMOVE PAPER.

NOTE 4: CABLE #5 STAYS BEHIND SPACER 1 AND GETS ROUTED ALONG THE SIDE
OF PLASTIC SPACER T O BATTERY #9 (+) TERMINAL.

Mark# Part# Lead# Qty. Length
263 2337894 1 5 7 inches
267 2337894−2 2 2 12 inches
264 2337894−3 3 2 14.5 inches
266 2337894−4 4 1 22 inches

SEE
NOTE 2.

68

AMX−4+ SERVICE

s

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 7−6

INST ALLATION OF BATTERIES IN BATTERY COMPARTMENT WITH SENSE BOARD 2334738−2

69

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

6. Put both batteries into position in back right side of compartment.

7. Position Batteries #1 & #4 in the compartment stacked one on top of the other,
with a separator pad between them (see Illustration 7−5). Push both batteries
into position alongside Batteries #2 & #3.

EQUIPMENT DAMAGE!

WARNING

Note: Don’t confuse Insulator #4 with the Insulator #1. Insulator #4 has two non-

DO NOT MIX AND MATCH HAWKER AND PANASONIC BATTERIES
BECAUSE OF IMPEDANCE DIFFERENCES BETWEEN THE TWO DIF­FERENT TYPES OF BATTERIES.

functional holes. Insulator #1s have two full cup−shaped bumps with no
holes.

8. Install Insulator #4 between Batteries #2 & #3 and Batteries #1 & #4. Install an
Insulator #2 next to Batteries #1 & #4, and another Insulator #2 next to Batteries
#2 & #3.

9. Connect sense harness wires to batteries #1 and #4 as follows:
Color Battery Polarity
Black 1 −
Yellow 4 +
Red 1 +
Green 4 −
Route sense harness in channel between top and bottom batteries.

CAUTION

10. Connect end of Lead #1 Battery #2 (+) to Battery #1 (−). Tighten hardware.

11. Connect end of Lead # 1 Battery #3 (−) to Battery #4 (+). Tighten hardware.

12. Connect end of Cable #4 Battery #1 (+), and slide a boot over this terminal.
Route Cable #4 through grommet in hole in top of battery compartment, con­nect it to the top terminal (LINE) on circuit breaker in AMX1 A3, and slide boot
over terminal.

13. Install Insulator #5, Insulator #6, and the remaining Insulator #2.

14. Position Batteries #5 & #6 in compartment, one on top of the other with a sepa­rator pad between them.

15. Connect one Cable #1 end to Battery #6 (+), and other end to Battery #5 (−).
Tighten Battery #6 (+). Leave nut off of Battery #5 (−) for now.

16. Connect Lead #3 to Battery #6 (−).

17. Connect Lead #2 to Battery #5 (+).

Do not touch Lead #2 and Lead #3. Tape ends for safety.

18. Push Batteries #5 & #6 to rear of battery compartment. Dress sense harness
up and out of the way.

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AMX−4+ SERVICE

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REV 20 DIRECTION 2173225−100

19. Connect free end of Cable #2 to Battery #4 (−) and tighten hardware. Slide
boots over each terminal.

Note: Cable #2 must route in channel between top and bottom batteries #1, 2, 3, 4,

along with sense harness.

20. Connect white harness under cable #1 to Battery #5 (−) and tighten hardware.

21. Place the plastic spacer board into battery compartment as shown in Illustra­tion 7−5 . Make sure bumpers on board touch batteries without pinching wires.
Wires should be routed in channel between top and bottom batteries #1, 2, 3,

4.

22. Install an Insulator #1 in front of Batteries #5 & #6 as shown in Illustration 7−5,
with cup−shaped bumps pointing away from you. Route free end of Cable #3
and sense harness between center channel of plastic spacer.

Note: Taping cables helps keep cables in channel.

WARNING

23. Position Batteries #7 & #8 in compartment stacked one on top of the other with
a separator pad between them.

EQUIPMENT DAMAGE!
DO NOT MIX AND MATCH HAWKER AND PANASONIC BATTERIES
BECAUSE OF IMPEDANCE DIFFERENCES BETWEEN THE TWO DIF­FERENT TYPES OF BATTERIES.

24. Connect one end of Cable #1 to Battery #8 (+) and tighten. Connect other end
to Battery #7 (−) leaving nut off or loose. Connect end of Cable #2 Battery #8
(−), and slide a boot over terminal.

25. Push Batteries #7 & #8 back into position, as shown, while holding Cable #3
and harness between center channel of plastic spacer.

26. Connect free end of Cable #3 from Battery #6 [−] to Battery #7 (+) along with
sense wire Orange #7 (+), tighten and slide a boot over terminal.

27. Connect sense wire Blue #7 (−) to Battery #7 (−) and tighten nut.

28. Install another Insulator #1 between Batteries #7 & #8 and Battery #9, with cup−
shaped bumps pointing away from you. Route free end of Cable #2 and har­ness to battery #9 between channel of plastic spacer.

29. Install Insulator #8 as shown.

WARNING

30. Position Battery #9 on top of Insulator #8.

EQUIPMENT DAMAGE!
DO NOT MIX AND MATCH HAWKER AND PANASONIC BATTERIES
BECAUSE OF IMPEDANCE DIFFERENCES BETWEEN THE TWO DIF­FERENT TYPES OF BATTERIES.

71

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

31. Connect free end of Cable #2 from Battery #8 [−] to Battery #9 (+), connect
sense wire #9 (+) Purple, tighten nut and slide a boot over terminal. Route cable
behind Insulator #1 and along plastic spacer.

32. Connect one end of Cable #3 to Battery #9 (−), and connect sense wire #9 (−)
Gray, tighten nut and slide a boot over cable terminal. Route other end of Cable
#3 through grommet in hole in top of battery compartment. Tape other end of
Cable #3.

Note: Do NOT connect Cable #3 to ground stud yet.

33. Connect AMX harness to J11 (output) and new battery harness to J1−10 (input)
at Battery Sense board connectors. Remove adhesive tape from feet of Sense
circuit board and place board on top of battery #9.

34. Measure the battery voltage between top circuit breaker terminal (LINE) with
Cable #4 connected (battery positive) and the unconnected end of Cable #3
(battery negative). It should measure between 111 and 118 volts DC, depend­ing on state of charge of the batteries.

35. (Applicable to Kit 46−329314G5 ONLY.)
Route the terminal block cable through the unit and mount the terminal block

as follows:
a. Open top cover of AMX−4.

b. Route connector end of furnished terminal block cable through grommets

in chassis as shown in Illustration 7−7.

c. Drill two holes 0.140 inches (9/64 inch) diameter, 2.65 inches apart, and

attach terminal block using hardware as shown in Illustration 7−7.

d. Secure terminal block cable to existing harness using furnished Ty−rap

straps. Connect other end of cable to the test terminal board connector J1 1.

Note: The terminal block is a test point, and is only connected to the harness.

e. Measure the individual battery voltages across terminals of terminal block.

Position 1 to Position 2 of terminal block measures Battery #1, Position 2
to Position 3 measures Battery #2, and so forth. Voltage of each battery
should be greater than 12.0 Volts. The actual value will depend upon bat­tery state of charge.

72

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 7−7

INST ALLATION OF BATTERY TEST HARNESS IN AMX−4 UNIT

(APPLICABLE TO KIT 46−329314G5 ONLY.)

VIEW “A”

(2) 4−40 KEPS NUTS
46−170012P34

HARNESS CONNECTS TO
OPPOSITE SIDE OF AMX
(SEE VIEW “A”)

(2) 4−40 SCREWS
46−208560P13

CABLE
46−316915G2

CONNECT TO BATTERY SENSE
BOARD (SEE ILLUSTRATION 7−8)

73

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 7−8

BATTERY SENSE BOARD, 2334738−2

74

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

36. Place the unit on a level floor . Extend the horizontal arm and rotate it to the front
end of the AMX (vertical−column end). Distribution of weight is necessary in
installing the battery−compartment cover. See Illustration 7−9.

ILLUSTRATION 7−9

AMX BATTERY COMPARTMENT
COVER INSTALLATION

ARM EXTENDED

CAUTION

LEVEL
FLOOR

BOLT S TORQUED TO

75 IN. LBS. (8.4 N-m)

37. Place the remaining Insulator #1 in the compartment opening with cup−shaped
bumps pointing away from you, as shown is Illustration 7−5.

38. Install battery compartment cover. Torque six capscrews to 75 inch pounds (8.4
Newton-meters), as shown in Illustration 7−9. Install the two metal plates (if ap­plicable) that correct over−size mounting holes.

The battery compartment cover is an integral part of the Base Assem­bly. All six bolts must be in place and torqued to 75 pound inches (8.4
Newton-meters) or the Base Assembly can be warped or cracked.

39. Remove tape from free end of Cable #3.

40. Connect Cable #3 to ground stud using flat washer and nut.

75

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

SECTION 8 − SERVICING THE BASE ASSEMBLY

8-1 Front Bumper

This avoids damage to the front bumper when jacking up the AMX unit.

8-1-1 Remove Pads

1. Remove the 10−32 x 1.25 inch bolts from each pad and remove the corner pads. See Illustration
8−1.

2. Remove the 10−32 x 1.25 inch bolts and flat washers securing the front bumper and remove the
middle piece of the front bumper.

ILLUSTRATION 8−1

REMOVAL OF BUMPER ASSEMBLY

CORNER
PAD

(4) 10−32 x 1.25I BOLT

(2) 10−32 x 1.25I BOLT

(2) FLAT
WASHER

MIDDLE
PIECE

FRONT CASTER YOKE

CORNER PAD

(4) 10−32 x 1.25I BOLT

76

AMX−4+ SERVICE

BUMPER

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

8-1-2 Install Pads

1. Install the middle piece of the front bumper using 10−32 x 1.25 inch bolts and flat washers. See
Illustration 8−1.

2. Install each of the two corner pads with 10−32 x 1.25 inch bolts for each pad.

8-1-3 Bumper Switch Removal

1. Remove pads. Refer to Section 8-1-1.

2. Remove actuator bracket to release tension on switch actuator. See Illustration 8−2.

3. Remove two binding head screws holding switch on end of bumper track.

4. Remove switch from bumper assembly.

ILLUSTRATION 8−2

BUMPER SWITCH

TRACK

BUMPER

SWITCH

BINDING
HEAD
SCREWS

ACTUATOR
BRACKET
WITH SPRING

8-1-4 Bumper Switch Installation

1. Shut off power.

2. Install switch on end of bumper track and secure with binding head screws. See Illustration 8−2.

3. Install actuator bracket to place tension on switch actuator.

4. Verify that bumper switch is activated by spring tension on switch actuator bracket.

5. Install bumper assembly.

SPRING
BRACKET

SPRING

NOTE: MISSING

OVERTRAVEL

SPRING

77

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

8-1-5 Bumper Bearings Removal

Note: This procedure covers the removal of any one or more of the eight bearings comprising the bumper assembly.

1. Remove the bumper pads. Refer to Section 8-1-1.

2. Remove the bumper switches. Refer to Section 8-1-3.

3. Remove spring from between actuator bracket and spring bracket to release tension on switch
actuator. See Illustration 8−2.

4. Remove switch actuator bracket by removing binding head screws and hex nuts.

5. Slide track from end of bumper assembly to expose bearings.

6. Remove bearing from mounting slot in bumper by removing hex head screw, spacer and shaft.

8-1-6 Bumper Bearings Installation

Note: This procedure covers the removal of any one or more of the eight bearings comprising the bumper assembly.

1. Install bearing in bumper assembly mounting slot and secure with one hex head screw, spacer and
shaft. See Illustration 8−3.

ILLUSTRATION 8−3

BUMPER BEARINGS

SHAFT

BEARING

SPACER

HEX HEAD

TRACK

SCREW

2. Slide track into end of bumper assembly.

3. Install switch actuator bracket and secure with two binding head screws and hex nuts.

4. Install spring between actuator bracket and spring bracket.

5. Verify that bumper switch is activated by spring tension on switch actuator bracket.

6. Install the bumper assembly.

78

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

8-2 Raise Unit for Service

Lifting can be done with:

− Automotive floor jack (minimum 1200 lbs. (550 kg) capacity).

− Lever (2  4 inches, palette lever) (5 cm  10 cm).

− Chain hoist.

− AMX−4 Series lifting jack, 46−302966P1 or equivalent service tool.

It is STRONGLY RECOMMENDED that the unit be lifted using the AMX−4 Series lifting jack. This
instruction is based on the use of this tool.

Get the AMX−4 lifting jack (or equivalent service tool) and note the two lips on the front of the jack. See
Illustration 8−4.

ILLUSTRATION 8−4

AMX−4 LIFTING JACK 46−302966P1

LIP

8-2-1 Raise Rear Wheels

1. Rotate front wheel caster toward rear, otherwise unit will be unstable when rear of unit is raised.

2. Block the front wheel and lift drive wheel end of base assembly approximately 10 inches (25 cm)
and place it on blocks.

3. Place blocks under wheel being removed to prevent it from falling when axle supports are removed.

8-2-2 Lower Rear Wheels

1. Put the jack under the rear of the AMX unit USING THE TWO LIPS ON THE FRONT OF THE
JACK, and lift the AMX unit enough to remove the wood block(s).

2. Lower the AMX unit and remove the jack.

LIP

79

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

8-2-3 Raise Front Wheels

1. Remove front bumper pads. Refer to Section 8-1-1.

2. Put the jack under the front of the AMX unit. See Illustration 8−5.

ILLUSTRATION 8−5

AMX−4 UNIT WITH JACK IN PLACE (FRONT)

Note: Ensure that the two lips on the front of the jack retain the front of the base in to prevent the unit from

falling off the jack.

3. Lift the AMX unit high enough to put the wood block (one 4x4 inch or two 2x4 inch) under the AMX
unit as shown in Illustration 8−6. Be sure that the block(s) is (are) centered under the front battery
box wall, and be sure that the block(s) extend(s) out at least 2 inches (5 cm) on each side of AMX
unit.

ILLUSTRATION 8−6

AMX−4 UNIT SUPPORTED BY WOOD BLOCK (FRONT)

2 INCHES
(5 CM) MIN.

WOOD BLOCK(S)
(SEE NOTES 1, 2, & 3)

NOTE 1: IF TWO BLOCKS ARE USED, ORI-

NOTE 2: CENTER BLOCK(S) WITH FRONT

NOTE 3: LOCATE WOOD BLOCK(S) SO THAT

FRONT BATTERY
BOX WALL

ENT BLOCKS FOR MAXIMUM STA­BILITY.

BATTERY BOX WALL.

BLOCK(S) STICKS OUT AT LEAST 2
INCHES (5 CM) BEYOND EACH SIDE
OF THE AMX UNIT.

80

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

8-2-4 Lower Front Wheels

1. Put the jack under the front of the AMX unit USING THE TWO LIPS ON THE FRONT OF THE
JACK, and lift the AMX unit enough to remove the wood block(s).

2. Lower the AMX unit and remove the jack.

8-3 Remove Drive Wheels

The following procedure covers removal of either the right or left drive wheel. The wheel mounting
support is welded to the side of the base assembly with the notch in the lower surface of the support. All
wheels have caliper assemblies.

1. Place the horizontal arm in park position.

2. Remove trim covers. See Section 6.

3. Remove motor and brake assembly. Refer to Section 8-5.

PERSONAL INJURY! WHEN LIFTING THE BACK OF THE UNIT IT CAN
BECOME UNSTABLE AND TIP OVER. USE EXTREME CAUTION WHEN
PERFORMING THIS OPERATION.

4. Lift the rear of the unit. See Section 8-2.

5. Loosen the four locknuts and flat washers holding the wheel support angle to the base assembly.
See Illustration 8−7.

6. Slide the support angle with its wheel block to the side and off of the wheel axle. The mounting holes
in the support angle are slotted for this purpose.

7. Leave the drive belt on the axle pulley.

8. Remove the wheel and caliper through the bottom of the base assembly.

9. Remove the four hex socket head capscrews and lockwashers from the top of the wheel mounting
support which secure the wheel and caliper assembly to the base assembly.

10. Carefully remove the wheel and caliper assembly through the bottom of the base assembly.

81

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 8−7

DRIVE WHEEL ASSEMBLY

HEX SOCKET
HEAD CAP SCREW

WASHER

SPLASH

GUARD

FLA T WASHER

SUPPORT
ANGLE

HEX HEAD
LOCKNUT

RIGHT SIDE AXLE

DRIVE BELT

DRIVE
WHEEL

DISC/CALIPER
ASSEMBLY

8-4 Install Drive Wheels

Note: This procedure covers the installation of either the right or left drive wheel.

PERSONAL INJURY! THE UNIT CAN BE UNSTABLE WHEN ON BLOCKS
AND TIP OVER. USE EXTREME CAUTION WHEN PERFORMING THIS
OPERATION.

Note: Apply light coat of grease (Lubriplate Fiske 630−A−A) to each end of axle.

1. The unit is on blocks approximately 10 inches (25 cm) above the floor.

2. Place the caliper assembly on the wheel axle.

3. Install the drive belt on the drive wheel pulley.

4. Lift the drive wheel through the bottom of the base assembly and into position in the notch in the
bottom of the wheel mounting support. See Illustration 8−7.

5. Attach the wheel and caliper assembly to the wheel mounting support with four hex socket head
capscrews. Do not tighten in place.

6. Slide the support angle with its wheel block onto the wheel axle as far as it will go.

7. Tighten the four locknuts and flat washers holding the wheel support angle to the base assembly.
Torque to 50−70 pound−inches (5.6 to 7.8 N−m).

82

AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

8. Secure the wheel and caliper assembly to the wheel mounting support. Torque to 40−60
pound−inches (4.5 to 6.7 N−m).

9. Install splash guard and secure with two lock nuts.

10. Install the motor and brake assembly. Refer to Section 8-6.

11. Lower the unit to the floor.

8-5 Remove Motor and Brake

Note: This procedure covers the removal of either the right or left motor and brake assembly.

1. Move unit to a flat, level surface.

2. Shut off power.

3. Remove cassette drawer from unit. Refer to Section 6-1.

4. Disconnect motor and brake wire connectors from motor control panel. See Illustration 8−8.

ILLUSTRATION 8−8

MOTOR AND BRAKE WIRING

TY−RAPS

MOTOR

BRAKE

CONNECTOR WIRES TO
MOTOR CONTROL PANEL

5. Carefully remove spring between base assembly and spring pin on motor mount plate. See
Illustration 8−9.

6. Remove nut and bolt holding motor mount to base.

7. Remove drive belt from motor pulley.

8. Remove motor and brake assembly.

9. Remove capscrews and washers holding motor to motor mount plate.

10. Remove binding head screws attaching brake to motor.

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AMX−4+ SERVICE

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 20 DIRECTION 2173225−100

ILLUSTRATION 8−9

MOTOR & BRAKE ASSEMBLY

SPRING

MOTOR MOUNT
NOTCH ON THIS SIDE

BRAKE

BRAKE

DRIVE MOTOR

DRIVE MOTOR

MOTOR MOUNT
NOTCH ON THIS SIDE

SPRING

MOTOR
MOUNT
BOLTS

WASHERS

8-6 Install Motor and Brake

Note: This procedure covers the installation of either the right or left motor and brake assembly.

1. Shut off power.

2. Install brake on motor and secure with binding head screws. Be certain brake is oriented on motor
(wires in position to be connected to motor control panel). See Illustration 8−8.

3. Install motor on mounting plate and attach with hex socket head capscrews and washers.

Note: Motor mounting plate must be oriented with the plate corner bevel toward the rear. If the Spring Pin was re-

moved from the mounting plate, replace it and check that it does not rub on the wheel. See Illustration 8−9.

4. Install motor and brake assembly in the base assembly.

5. Attach motor mount to base with nut and motor mount bolt and tighten finger tight

6. Place drive belt in position on motor pulley.

7. Carefully install spring between base assembly and motor and spring pin on motor mount plate. This
places tension on the drive belt.

8. Tighten motor mount nut, ensuring the belt tension is not offset by tightening. Torque to 50−60
foot−pounds (67.8 − 81.3 N−m).

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