A-dec 200 User manual

A-dec 200™ Service Guide

A - D E C 2 0 0 S E R V I C E G U I D E

Copyright

© 2011 A-dec Inc. All rights reserved.

A-dec Inc. makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. A-dec Inc. shall not be held liable for any errors contained herein or any consequential or other damages concerning the furnishing, performance or use of this material. The information in this document is subject to change without notice. If you find any problems in the documentation, please report them to us in writing. A-dec Inc. does not warrant that this document is error-free.

No part of this document may be copied, reproduced, altered, or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without prior written permission from A-dec Inc.

Trademarks and Additional Intellectual Property Rights

A-dec, the A-dec logo, A-dec 500, A-dec 300, Cascade, Cascade Master Series, Century Plus, Continental, Decade, ICX, ICV, Performer, Preference, Preference Collection, Preference ICC, and Radius are trademarks of A-dec Inc. and are registered in the U.S. and other countries. A-dec 200, Preference Slimline, and reliablecreativesolutions are also trademarks of A-dec Inc. None of the trademarks or trade names in this document may be reproduced, copied, or manipulated in any manner without the express, written approval of the trademark owner.

Certain touchpad symbols are proprietary to A-dec Inc. Any use of these symbols, in whole or in part, without the express written consent of A-dec Inc. is strictly prohibited.

Intended Application and Use

This equipment/system is intended for diagnostic and therapeutic treatment of dental patients by licensed health care professionals.

A dental operative unit (with or without accessories) is an AC-powered device intended to supply power to and serve as a base for other dental devices, such as a dental handpiece, a dental operating light, an air or water syringe unit, an oral cavity evacuator, a suction operative unit, and other dental devices and accessories.

Comments and Feedback

If you have any feedback or comments about this document, contact:

A-dec Inc.

Technical Communications Department

2601 Crestview Drive

Newberg OR 97132 USA

USA/Canada: 1.800.547.1883

Worldwide: 1.503.538.7478

E-mail: [e-mail]

Website: www.a-dec.com

Regulatory Information

Regulatory information is provided with A-dec equipment as mandated by agency requirements. This information is delivered in the equipment’s Instructions for Use or the separate Regulatory Information and Specifications document. If you need this information, please go to the Document Library at www.a-dec.com.

Product Service

For service information, contact your local authorized A-dec dealer. To find your local dealer, go to www.a-dec.com.

C O N T E N T S

1 INTRODUCTION ...............................................	1
Get Support ............................................................	1
International Customer Service .........................................	1
Inside this Guide ......................................................	1
A-dec 200 System .....................................................	2
Serial and Model Numbers...........................................	3
Service Tools ...........................................................	4
2 DENTAL CHAIR ................................................	7
Product Overview.....................................................	8
Chair Load Capacity.......................................................	8
Power and Status .........................................................	8
Limit Switch and Chair Lockout .........................................	8
Circuit Board Components ...............................................	9
Service, Maintenance, and Adjustments .......................	10
Factory Default Routine ................................................	10
Potentiometers ..........................................................	11
Adjust the Base Up Limit Switch: ........................................	11
Adjust the Base Positioning Potentiometer ............................	12
Adjust the Back Potentiometer ..........................................	12
Hydraulic System ........................................................	13
Solenoids..................................................................	14
Test the Solenoid ...........................................................	14
Remove and Replace the Solenoid .......................................	14
Test the Motor Pump....................................................	15
Headrest Adjustments ..................................................	16
Chair Speed Adjustments ..............................................	16
Illustrated Parts Breakdown.......................................	17
Part Identification.......................................................	17
Chair Covers..............................................................	17
Upper Chair Assembly ..................................................	18
Mid Chair Assembly .....................................................	20

Lower Chair Assembly...................................................	22
Headrest Assembly ......................................................	23
Motor Pump and Capacitor Assembly .................................	24
Hydraulic Manifold Assembly ..........................................	26
Hydraulic Tank Assembly ...............................................	27
Base Limit Switch Assembly............................................	27
Back Potentiometer Assembly .........................................	28
Base Position Potentiometer Assembly ...............................	29
3 PROGRAMMING ..............................................	31
Touchpad Options ...................................................	32
Chair Positions ...........................................................	32
X-Ray/Rinse Button......................................................	32
Dental Light ..............................................................	33
Auto On/Off .................................................................	33
Cuspidor Cupfill and Bowl Rinse.......................................	34
Standard Cuspidor (no touchpad) .......................................	34
Cuspidor with Optional Touchpad .......................................	34
Customize Cupfill and Bowl Rinse Functions ..........................	34
4 DELIVERY SYSTEM ..........................................	35
Product Overview...................................................	35
A-dec Tubing..............................................................	36
Service, Maintenance, and Adjustments .......................	37
Flexarm Adjustments ...................................................	37
Instrument Holder Adjustments .......................................	38
Handle .......................................................................	38
Control Block .............................................................	39
Remove the Control Block ................................................	39
Handpiece Control Adjustments.......................................	40
Adjust the Water Coolant .................................................	40
Adjust the Air Coolant ....................................................	40
Adjust the Drive Air Pressure .............................................	41
Oil Collector ..............................................................	41

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Handpiece Tubing Replacement.......................................	42
Adjust Tubing Length ......................................................	42
Quad Voltage Intraoral Light Source (QVIOLS)......................	43
Intraoral Light Source Adjustments .....................................	44
Intraoral Light Source Length and Voltage ..........................	45
Illustrated Parts Breakdown ......................................	47
Part Identification.......................................................	47
A-dec 200 Delivery System.............................................	48
Holder Assembly.........................................................	50
Control Block Assembly ................................................	52
Toggles Assemblies (Flush Toggle and Master On/Off Toggle) ....	53
Oil Collector .............................................................	54
5 CUSPIDOR AND SUPPORT CENTER .......................	55
Product Overview...................................................	55
Service, Maintenance, and Adjustments .......................	56
Bowl Rinse Flow Adjustment ..........................................	56
Adjusting the Cuspidor Cupfill and Bowl Rinse ........................	56
Self-Contained Water System .........................................	56
Illustrated Parts Breakdown ......................................	57
Part Identification.......................................................	57
A-dec 200 Support Center .............................................	58
A-dec 200 Cuspidor .....................................................	60
Self-Contained Water Bottle ..........................................	61
Cupfill/Bowl Rinse Manifold ...........................................	62
6 ASSISTANT’S INSTRUMENTATION ........................	63
Product Overview...................................................	63
Service, Maintenance, and Adjustments .......................	64
Auto-air Holder ..........................................................	64
Positioning Assistant’s Holder .........................................	64
Assistant’s Touchpad Connections ....................................	65

Vacuum Instrumentation ...............................................	65
Solids Collector ..........................................................	66
Illustrated Parts Breakdown ......................................	67
Part Identification .......................................................	67
Telescoping Assistant’s Arm............................................	68
Assistant’s Touchpad Assembly ........................................	69
Assistant’s Auto-Air Holder.............................................	70
Assistant’s Standard Holder ............................................	72
7 UTILITIES .....................................................	73
Product Overview...................................................	74
Shutoff Valves ............................................................	74
Gauge and Pre-Regulator .................................................	74
Service, Maintenance, and Adjustments .......................	75
Air and Water Filter Replacement ....................................	75
Illustrated Parts Breakdown ......................................	77
Part Identification .......................................................	77
Air Filter/Regulator Assembly .........................................	78
Water Filter/Regulator Body Assembly...............................	79
8 DENTAL LIGHT...............................................	81
Product Overview...................................................	82
Dental Light Specifications ............................................	82
Nominal Light Intensity ...................................................	82
On/Off Button ..............................................................	82
Auto On/Off Feature ......................................................	82
Service, Maintenance, and Adjustments .......................	83
Circuit Breaker Location ...............................................	83
Intensity Switches .......................................................	83
Dental Light Wire Connections on the 200 Dental Chair ..........	84
Dental Light Relay Circuit Board ......................................	86
LED Identification ..........................................................	86

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Table of Contents

Flexarm Adjustments ...................................................	87
Rotation Adjustments...................................................	87
Diagonal Adjustment .......................................................	87
Vertical Adjustment ........................................................	87
Bulb Replacement .......................................................	88
Illustrated Parts Breakdown.......................................	89
200 Dental Light ........................................................	89
9 TROUBLESHOOTING ........................................	91
Dental Chair ..........................................................	91
Delivery System .....................................................	98
Holders ...............................................................	102
Utility Area ..........................................................	102
Cuspidor..............................................................	103
Dental Lights ........................................................	107
10 TUBING AND FLOW DIAGRAMS .........................	109
A-dec Tubing ........................................................	109
Antimicrobial AlphaSan and Color Tracer Markings ...............	109
Chair Flow Diagram ................................................	112
Delivery System Flow Diagram ..................................	113
Assistant’s and Support Center Flow Diagram................	114
Utilities Flow Diagram.............................................	115

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I N T R O D U C T I O N

The A-dec 200 Service Guide provides service information for the A-dec 200 dental system, including the chair, programming, delivery system, cuspidor and support center, assistant’s instrumentation, utilities, and dental light. Users of this guide should understand basic operation and maintenance of dental and medical equipment, and use of flow diagrams.

CAUTION Possible injury or equipment damage. Service to be performed by trained personnel only.

Get Support

For questions not addressed in this document, contact A-dec Customer Service using contact information for your region.

International Customer Service

2601 Crestview Drive Newberg, Oregon 97132

Telephone: [phone] or 1 [phone] Fax: [phone]

Internet: www.a-dec.com

Inside this Guide

This guide contains service, maintenance and adjustments; flow diagrams; exploded parts breakdown of assemblies; and troubleshooting.

The following regulatory symbols may appear throughout the document.

NOTE Notes indicate additional information, and when it is important that instructions are followed.

TIP Tips indicate tips or tricks to make installation, use, or maintenance easier.

WARNING Warning indicates potential severe injury or death if instructions are not followed properly.

CAUTION Caution indicates when failure to follow instructions could result in damage to product or minor injury.

DANGER Danger indicates warnings of dangerous voltage and of certain electrical shock.

BIOHAZARD Biohazard indicates potential infection if instructions are not properly followed.

IMPORTANT Important indicates areas in which to refer to or use specific instructions.

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A-dec 200 System

A-dec 200 system comes configured as shown below:

Figure 1. A-dec 200 Systems

Cuspidor (page 55)

Assistant’s Instrumentation (page 63)

Dental Chair (page 7)

Serial Number Location

Footswitch

Foot Control

Support Center
(page 55)	Dental Light
	(page 81)

Delivery System (page 35)

Touchpad (page 31)

Solids Collector

(page 66)

Utilities

(page 73)

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Serial and Model Numbers

Product serial and model number information can be found on the serial/ model number labels. When you contact customer service, the serial number helps identify the product and when it was manufactured.

Use Table 1 and Figure 2 to reference how to identify serial/model number information.

Introduction

Table 1. Month Identification Table

Letter	Month	Letter	Month
A	January	G	July
B	February	H	August
C	March	I	September
D	April	J	October
E	May	K	November
F	June	L	December

Figure 2. Serial Number Label Example

200	1
	2

(1) The REF number is the model number. (2) The first letter of the serial number indicates the month the product was manufactured. The first digit of the serial number is the year of manufacture (for example, L8 = December 2008).

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A-dec 200 Service Guide

Service Tools

This table lists the types of tools available from A-dec for servicing A-dec 200 equipment and their recommended use:

Table 2. Recommended Tools

Tool	Task	Part Illustration	Part Number
Drive air pressure gauge	Adjusting handpiece drive air pressure, 0-60 psi (4.13 bar)		50.0271.00
	This gauge does not fit the Borden 3-hole coupler

Hemostat	•	Troubleshooting or repairing a unit	009.008.00
	•	Stopping air or water flow through tubing
Hex key set	Servicing or installing A-dec equipment (plastic case included)		009.018.00

Loctite®	Installing threaded fasteners to prevent loosening	060.001.00 (Red 271)
		060.002.00 (Blue 242)
O-ring tools	Replacing O-rings during quick field repairs (fits the four	009.013.00
	smallest O-ring sizes)
Panel mount gauge	• Checking air/water pressure	026.118.00
	• Checking inline pressure gauge for testing purposes

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Introduction

Table 2. Recommended Tools (continued)

Tool	Task	Part Illustration	Part Number
A-dec Silicone lubricant	Lubricating internal moving parts such as O-rings, oral		98.0090.01
	evacuator valves, and bushings
	CAUTION Use only A-dec Silicone lubricant or
	the O-rings may be damaged.
Sleeve tool	Aiding in securing 1/4" tubing sleeves and 1/8" uni-clamps		98.0072.00
Snap ring tool	Installing and removing internal and external snap rings (fits		009.007.00
	all snap rings used in A-dec equipment)
Tubing stripper	Separating the extruded air and water lines in vinyl tubing		009.035.00
Umbilical stringer	Routing additional tubing or wiring through existing umbilical		009.015.00
	assemblies (12’ [3.66 meter] stringer with threading holes on
	both ends)
Valve test syringe	Testing of pilot operated valves; used to apply a static		98.0050.01
	pressure of 5-75 psi (.34-5.17 bar)

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DENTAL CHAIR

This section provides detailed information related to service, maintenance,	Figure 3. A-dec 200 Chair
and adjustment of the A-dec 200 dental chair.

Contents

•Product Overview, page 8

•Service, Maintenance, and Adjustments, page 10

•Illustrated Parts Breakdown, page 17

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Product Overview

Chair Load Capacity

Maximum Chair Capacity:

•Patient Load 136 kg (300 lbs.)

•Module/Accessory Loads (maximum off-center) with A-dec 200 system: 68 kg (150 lbs.) @ 406 mm (16")

Power and Status

The chair and system is controlled by the master toggle on the delivery system. The power should always be turned off for service. When the A- dec logo on the touchpad or the status light on the chair lift arm are illuminated, the system is on and ready for use. If the status light blinks, the limit switch has been activated.

Figure 4. Power and Status

Master Toggle

(Power On/Off)

Status Light

Limit Switch and Chair Lockout

If anything becomes lodged under the chair lift arm or assistant’s arm, a limit switch stops the downward motion of the chair. Pressing the chair stop plate or lifting up on the assistant’s arm activates the limit switches. Use the footswitch or touchpad to raise the chair, then remove the object.

The optional lockout kit inhibits the operation of the dental chair when a handpiece is removed from its holder and the foot control pressed. When this happens, the chair status light blinks quickly. To resume, replace the handpiece and use the footswitch or touchpad to raise the chair.

Figure 5. Chair Lockout Overview

Chair Lift Arm

Assistant’s

Arm

Status

Light

Chair Stop

Plate

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Circuit Board Components

Table 3. LED Identification

	LED	Status	Description
	DS16 - AC power	Off	No 24 VAC power, tripped circuit
	LED		breaker, power supply turned off, no
			line voltage
		Green, steady	24VAC at the terminal strip
	DS15 - Status LED	Off	System is not functioning, no power or
			circuit board has failed
		Green, steady	Normal operation
	DS17 - Data LED	Off	No DCS communication, not connected
			to the DCS, or DCS has failed
		Green, steady	Detects active DCS
		Green, blinking	Valid DCS Message
	DS6 Stop plate	Off	Closed, (normal)
	limit switch
		Red	Open, (activated)
	DS4 - Chair	Off	Open, (normal)
	lockout
		Red	Closed, (activated)
	DS3 and DS5 -	Off	Potentiometer:
	Chair		Not connected or bad connection
	potentiometers		Moving in wrong direction
			Limited range of motion, or
			Cable is not on wheel
		Yellow, steady	Normal operation
		Yellow, fast blink	Upper end of travel
	DS7, DS13,	Off	Relay is off
	DS12, DS14 -
		On	Relay is on
	Chair relay LEDs
	DS8		Capacitor switch
	DS9		Back up limit switch
	DS10		Base up limit switch
	DS11		off = relay is off; on = relay is on
	DS1, DS2		Position 3 function selection

Dental Chair

Figure 6. Chair Circuit Board Components

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Service, Maintenance, and Adjustments

Contents

•Potentiometers, page 11

•Hydraulic System, page 13

•Solenoids, page 14

•Test the Motor Pump, page 15

•Headrest Adjustments, page 16

•Chair Speed Adjustments, page 16

Factory Default Routine

When a new circuit board is installed in the chair, factory default routine needs to be run to learn the range of motion of the chair. The routine:

•Sets the base and back upper limits

•Calculates new presets based on actual range of motion of the chair

•Verifies that the potentiometers work

To start the factory default routine, place the “spare” jumper in the factory default position on the P17 test points of the chair circuit board (see "Circuit Board Components" on page 9 for reference).

When running the factory default routine the chair:

1.Moves base down

2.Moves base up

3.Moves back down

4.Moves back up

5.Moves base and back to Position 0

6.Beeps three times

NOTE The jumper must remain in the factory default position to complete the factory default routine. The status LEDs on the standard and deluxe touchpads and the chair circuit board double blink while the factory default routine is running and after the routine is complete.

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Potentiometers

Potentiometers provide the controller with current position values for the chair base and back. The controller saves the chair values when programmed and compares the values with current position values for the pre-position and auto-return functions.

Adjust the Base Up Limit Switch:

1.Remove the motor pump cover.

2.Loosen the two screws clamping the limit switch to the mounting bracket.

Figure 7. Mounting Bracket

Switch Arm

Limit Switch

Actuator Pin

Clamping

Screws

Mounting

Bracket

Dental Chair

Figure 8. Chair Position

25"

63.5 cm

4.Push the limit switch against the actuator on the drive gear until the switch opens (clicks), then tighten the clamping screws. (See Figure 7).

5.Position the chair base down until the limit switch has closed, then position the chair full base up. Check the distance between the top of the base plate to the flat area around the threaded stud the chair adapter mounts to. If the distance is incorrect, repeat steps 2 through 4.

3. Position the chair as shown in Figure 8.

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A-dec 200 Service Guide

Adjust the Base Positioning Potentiometer

1.Remove the motor pump cover and position the chair base down.

2.Use a 3/16" hex key to remove the limit switch and mounting screw. See Figure 9.

3.Turn the potentiometer gear counterclockwise until it stops.

4.Align the potentiometer assembly, then turn the potentiometer gear clockwise two teeth.

5.Reinstall the limit switch and potentiometer assembly. Make sure the potentiometer gear does not turn and the two gears mesh properly.

6.Ensure that the electrical connections to the limit switch and positioning potentiometer are property set.

7.While observing the two gears for binding, lower the chair base.

CAUTION Do not raise to the full base up position until after you have checked the base up limit switch for proper adjustment. the chair may go into hydraulic lock if not adjusted properly.

8. Reinstall the cover, and program the auto-positioning functions.

Figure 9. Base Potentiometer

	Potentiometer	Large Drive
	Gear
		Gear

Positioning

Potentiometer

Limit Switch

Mounting

Screw

Adjust the Back Potentiometer

1.Position the chair back to its full up position.

2.Disconnect the limit switch wiring harness from the limit switch.

3.Remove the limit switch mounting screws and limit switch from the bracket. Do not bend the switch arm.

4.Remove the bracket mounting screws.

5.Remove the drive shaft from the potentiometer shaft.

6.Remove the drive shaft from the chair by moving it toward the chair backrest, and slightly to the side to dislodge it from the holder.

Figure 10. Remove Drive Shaft
Limit Switch	Switch Arm
Mounting Screws
		Urethane Tubing
Tip		3/8" OD
Bracket Mounting
Screws		Potentiometer
	Drive Shaft	Shaft

7.Turn the potentiometer shaft clockwise until it no longer turns, then turn the shaft counterclockwise 1/8" of a turn

Figure 11. Adjust Back Potentiometer

Potentiometer

Shaft Counterclockwise Clockwise

8. Reinstall the shaft.

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Hydraulic System

The hydraulic system consists of:

•Hydraulic fluid reservoir

The fluid level in the reservoir can be seen through the sides of the reservoir and is serviced via a top fill cap.

•Hydraulic cylinders

The hydraulic cylinders control the base lift and back functions. Springs and gravity retract the rod during base and back down functions.

•Motor-driven hydraulic pump

The hydraulic pump and the starter capacitor supply hydraulic fluid from the reservoir, under pressure, to the chair lift and tilt hydraulic cylinders for back up and base up functions.

•Solenoid/manifold assembly

This assembly gates hydraulic fluid to and from the two cylinders. Depending on the chair function called for, the controller selects which solenoid-actuated manifold valves are opened or closed. The solenoid/ manifold assembly also includes four adjustable needle valves used to restrict or divert the flow of hydraulic fluid to and from the lift and tilt cylinders. These valves provide the rate of travel adjustment for chair base and back movement.

Dental Chair

Figure 12. Hydraulic System

Hydraulic Cylinders

Hydraulic Fluid Reservoir

Solenoid/Manifold

Assembly

Motor Pump

NOTE If cable ties are present in the product and you need to remove them for servicing, make sure to replace the ties after service is completed.

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Solenoids

Test the Solenoid

To test the magnetic pull of the solenoid hold the tip of screwdriver near a solenoid and activate the appropriate chair function. You should feel the tug of the magnetic field generated around the solenoid.

Figure 13. Test the Solenoid

Remove and Replace the Solenoid

1.Lower the chair base and back to the full down position. Remove the motor pump cover, then unplug the chair.

WARNING The solenoid coils are powered by line voltage (100, 120, or 240 V). Failure to unplug the chair may result in serious injury from electrical shock.

2.Using a pair of wire cutters, cut the wiring to the faulty solenoid at about mid point between the solenoid and connector P10.

3.Using a 9/16" wrench, remove the solenoid retaining nut and slide the coil off the poppet sleeve.

CAUTION Use caution when removing and replacing the coil. The poppet sleeve is easily bent. Even slight bending of the sleeve will result in the malfunction of the solenoid valve.

4.Using a flat-tipped screwdriver, loosen and then remove the sleeve and poppet from the manifold assembly.

WARNING To prevent the possibility of over-heating and failure, replace the entire solenoid assembly.

5.Remove the o-ring from inside the manifold, and install a new o-ring.

6.Install a new sleeve and poppet; tighten the poppet sleeve using a flattipped screwdriver.

7.Install a new coil on the plunger. Do not overtighten the retaining nut.

8.Strip approximately 1/4" of insulation from the wires cut in step 2, and install a crimp-on butt-type connector on each wire.

9.On the new solenoid, cut the wiring to length allowing enough to reach the crimped-on connectors. Strip approximately 1/4" of insulation from the wires and crimp each wire into a connector.

Figure 14. Remove and Replace Solenoid

Hydraulic

Manifold

O-ring

Poppet

Poppet Washer

Sleeve

Solenoid

P10

ID Washer (Solenoid

Specifications)

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Dental Chair

Test the Motor Pump

This test requires the use of a current pickup probe.

•Clip the probe onto the red wire going to the motor pump.

•Use the footswitch or touchpad to raise the chair.

You should read 5 Amps (maximum) of current for 120 V motor pump, or 2.5 Amps (maximum) of current for 240 V motor pump.

Figure 15. Test Motor Pump

Red Wire

White Wire

Motor Pump

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A-dec 200 Service Guide

Headrest Adjustments

Turn the locking knob clockwise to lock it into the desired position. Slide the headrest and glide bar up or down to adjust the height.

WARNING When the glidebar has reached its maximum recommended working height, a warning will be visible on the patient’s side of the glide bar. Do not use the headrest in a position where this warning is visible.

Figure 16. Headrest Adjustments

Locking

Knob

Glide Bar

Chair Speed Adjustments

The speed for moving the chair seat and back can be adjusted. Use a 3/32" hex key to adjust the chair base speed and back speed on the manifold (see

Figure 17. Adjust Manifold for Chair Speed

Adjust chair

Adjust chair

back speed.

base speed.

NOTE If cable ties are present in the product and you need to remove them for servicing, make sure to replace the ties after service is completed.

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Illustrated Parts Breakdown

Part Identification

In this section, you will find serviceable components tables that correspond to the illustrations. The tables identify all parts and kits, including those that are not for sale. Parts that are not for sale are indicated with the symbol shown below:

†— Indicates that the individual part is not available for sale. These parts are typically part of a kit and/or larger assembly that is for sale.

Contents

•Chair Covers, page 17

•Upper Chair Assembly, page 18

•Mid Chair Assembly, page 20

•Lower Chair Assembly, page 22

•Headrest Assembly, page 23

•Motor Pump and Capacitor Assembly, page 24

•Hydraulic Manifold Assembly, page 26

•Hydraulic Tank Assembly, page 27

•Base Limit Switch Assembly, page 27

•Back Potentiometer Assembly, page 28

•Base Position Potentiometer Assembly, page 29

Dental Chair

Chair Covers

Figure 18. A-dec 200 Dental Chair

1

2 5

3

4

Item	Part Number	Description
1	61.3821.00	Rear chair cover
2	61.3847.00	Bottom cover
3	61.3846.00	Utility cover
4	61.2239.01	Lift arm cover
5	61.2242.00	Umbilical routing bracket

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A-dec 200 Service Guide

Upper Chair Assembly

Item	Part Number	Description
1	—	Double articulating headrest assembly (see page 23)
2	61.3824.00	Backrest cover
3	61.3791.00	Armrest release button
4	013.052.00	Compression spring, .843 OD X 1.375 FL
5	61.1245.02 †	Arm support, LH
6	004.157.00	Wave spring washer, .990 OD stainless steel
7	004.126.00	Flat washer
8	61.3827.00	Armrest cover
9	61.3790.01	Armrest pivot plate, LH
10	005.123.01	Button head socket screw, 10-32 X 5/8"
11	61.3108.00	Flanged bearing
12	001.164.00	Socket shoulder screw, 1/2-13 X 5/8 X 5/8
13	61.3788.01	Pivot bolt cover
14	61.2740.00	Backrest link pin
15	016.131.00	Flanged bearing
16	007.069.00	Set screw, socket 1/4-20 X 1/4
17	61.3792.00	Back link
18	61.3789.01	Armrest pivot plate, RH
19	005.147.00	Flat head socket screw, 1/4-20 X 1-1/4
20	006.122.01	Retainer nut, 10-32 zinc
21	61.2743.00	Brake shoe
22	61.1247.02 †	Arm support, RH
23	001.268.00	Socket screw, 1/4-20 X 3/30 mm stainless steel
24	002.136.00	Flat head socket screw, 1/4-20 X 1/38

† Indicates that the individual part is not available for sale

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Dental Chair

Figure 19. Upper Chair Assembly

1

Headrest Assembly (see page 23)

2
		21
		20
23		19
8		24
		18

17

22

21

20

8	7	6	5	4		3

16
14
			9
		10
15
13	12	11

86.0016.00 Rev A

19

A-dec 200 Service Guide

Mid Chair Assembly

Item	Part Number	Description	Item	Part Number	Description
1	61.1309.00	Tilt slide block	21	35.1749.00	Chair mount adaptor
2	61.1311.00	Tilt cylinder clevis rod	22	004.171.00	Thrust washer
3	61.1267.00	Tilt cylinder assembly	23	006.124.00	5/8-18 UNF-2B ESNA 4N zinc
4	010.031.00	E-clip	24	025.072.00	Cable tie mounting block
5	61.2076.00	Roller arm link	25	005.143.00	Button head socket screw, 1/4-20 X 3/8"
6	61.2078.00	Toeboard axle	26	61.1294.00 † Lower structure link
7	61.2293.00	Linkarm roller	27	41.1145.00	Umbilical support
8	005.008.01	Socket head screw, 1/4-20 X 1/2"	28	41.1143.00	Umbilical restraint
9	025.044.00	Clamp	29	61.2095.00 †	Lift arm
10	61.1308.00	Channel guide	30	004.149.00	Flat neoprene washer, .680 ID
11	013.054.00	Spring	31	004.104.00	Flat steel plated washer, .640 ID
12	002.134.00	Socket head screw, 1/4-20 X 1/4"	32	—	Lift cylinder
13	61.1221.00	Base limit switch assembly	33	61.1285.00	Lift pin
14	61.1224.00	Back position potentiometer assembly	34	011.046.00	Clip pin
15	002.023.00	Head screw, 3/8-16 X 1-1/4	35	41.1144.00	Umbilical retainer
16	61.1314.00	Wear pad	36	001.165.00	Socket head shoulder screw
17	002.120.00	Socket head patch screw, 1/4-20 X 1" stainless steel	37	001.164.00	Socket head shoulder bolt
18	004.148.00	Flat nylatron washer, .630 ID	38	61.3825.00 †	Swivel bracket
19	—	Seat armature	39	61.3826.00 † Upper structure, gray 3
20	61.1270.00	Stud

† Indicates that the individual part is not available for sale

20	86.0016.00 Rev A

Dental Chair

Figure 20. Mid Chair Assembly

1				2	3		4					4
									5
4							4
5									6
		13 Base Limit Switch					7
									7
		(see page 27)							8
	14 Back Potentiometer								10
							12		11		19
	(See page 28)

																15				16
				39												38							17
				18
																				18									20
	37															18					22
																												23
	26
																	28			27					26
	36
																				18

18

29

35		30
	34								31
	32
	4									4
	33

21

24	25

Lower Chair

(see page 22)

86.0016.00 Rev A

21

A-dec 200 Service Guide

Lower Chair Assembly

				Figure 21.
	Item	Part Number	Description
	1	010.031.01	E-clip
	2	61.1285.00	Pivot pin
	3	001.163.00	Hex head cap screw, 1/2-13 X 1-1/4
	4	004.148.00	Flat nylatron washer, .630 ID
	5	001.165.00	Socket head shoulder screw
	6	005.008.01	Socket head screw, 1/4-20 X 1/2
	7	61.1277.01 †	Sub base
	8	61.3848.00	Floorbox/pump cover
	9	61.1650.00	Foot switch/foot control bracket
	10	61.2037.01	Baseplate
	11	61.1286.00	Bracket
	12	005.143.00	Button head socket screw, 1/4-20 X 3/8
	13	61.1221.00	Base position potentiometer assembly
	14	61.1295.00	Gear

† Indicates that the individual part is not available for sale

1

2

Lower Chair Assembly

Upper Chair Assembly (see page 18)

1	Mid Chair Assembly
2	(see page 20)

	3	4
		5
	14	6
13		7
12		8
	9
11

10

Motor Pump Assembly (see page 24)

22	86.0016.00 Rev A