This section contains the general safety precautions
which must be observed during maintenance of the aerial
platform. It is of utmost importance that maintenance personnel pay strict attention to these warnings and precautions to avoid possible injury to themselves or others, or
damage to the equipment. A maintenance program must
be followed to ensure that the machine is safe to operate.
MODIFICATION OR ALTERATION OF AN AERIAL WORK PLATFORM
SHALL BE MADE ONLY WITH WRITTEN PERMISSION FROM THE
MANUFACTURER.
The specific precautions to be observed during maintenance are inserted at the appropriate point in the manual.
These precautions are, for the most part, those that apply
when servicing hydraulic and larger machine component
parts.
Your safety, and that of others, is the first consideration
when engaging in the maintenance of equipment. Always
be conscious of weight. Never attempt to move heavy
parts without the aid of a mechanical device. Do not allow
heavy objects to rest in an unstable position. When raising
a portion of the equipment, ensure that adequate support
is provided.
SINCE THE MACHINE MANUFACTURER HAS NO
DIRECT CONTROL OVER THE FIELD INSPECTION
AND MAINTENANCE, SAFETY IN THIS AREA RESPONSIBILITY OF THE OWNER/OPERATOR.
B. HYDRAULIC SYSTEM SAFETY
It should be noted that the machines hydraulic systems
operate at extremely high potentially dangerous pressures. Every effort should be made to relieve any system
pressure prior to disconnecting or removing any portion of
the system.
C. MAINTENANCE
FAILURE TO COMPLY WITH SAFETY PRECAUTIONS
LISTED IN THIS SECTION COULD RESULT IN
MACHINE DAMAGE, PERSONNEL INJURY OR DEATH
AND IS A SAFETY VIOLATION.
• ENSURE REPLACEMENT PARTS OR COMPONENTS
ARE IDENTICAL OR EQUIVALENT TO ORIGINAL
PARTS OR COMPONENTS.
• NO SMOKING IS MANDATORY. NEVER REFUEL DURING ELECTRICAL STORMS. ENSURE THAT FUEL
CAP IS CLOSED AND SECURE AT ALL OTHER
TIMES.
• REMOVE ALL RINGS, WATCHES AND JEWELRY
WHEN PERFORMING ANY MAINTENANCE.
• DO NOT WEAR LONG HAIR UNRESTRAINED, OR
LOOSE-FITTING CLOTHING AND NECKTIES WHICH
ARE APT TO BECOME CAUGHT ON OR ENTANGLED
IN EQUIPMENT.
• OBSERVE AND OBEY ALL WARNINGS AND CAUTIONS ON MACHINE AND IN SERVICE MANUAL.
• KEEP OIL, GREASE, WATER, ETC. WIPED FROM
STANDING SURFACES AND HAND HOLDS.
• USE CAUTION WHEN CHECKING A HOT, PRESSURIZED COOLANT SYSTEM.
• NEVER WORK UNDER AN ELEVATED SCISSOR
UNTIL PLATFORM HAS BEEN SAFELY RESTRAINED
FROM ANY MOVEMENT BY BLOCKING OR OVERHEAD SLING, OR SAFETY PROP HAS BEEN
ENGAGED.
• BEFORE MAKING ADJUSTMENTS, LUBRICATING OR
PERFORMING ANY OTHER MAINTENANCE, SHUT
OFF ALL POWER CONTROLS.
• BATTERY SHOULD ALWAYS BE DISCONNECTED
DURING REPLACEMENT OF ELECTRICAL COMPONENTS.
• KEEP ALL SUPPORT EQUIPMENT AND ATTACHMENTS STOWED IN THEIR PROPER PLACE.
• USE ONLY APPROVED, NONFLAMMABLE CLEANING
SOLVENTS.
3121273– JLG Lift –a
INTRODUCTION - MAINTENANCE SAFETY PRECAUTIONS
REVISION LOG
Original Issue - January 30, 2012
Manual Revised - August 1, 2012
Manual Revised - January 29, 2013
Manual Revised - April 8, 2013
b– JLG Lift –3121273
TABLE OF CONTENTS
TABLE OF CONTENTS
SUBJECT - SECTION, PARAGRAPHPAGE NO.
SECTION A - INTRODUCTION - MAINTENANCE SAFETY PRECAUTIONS
JLG MACHINES EQUIPPED WITH DELTA Q BATTERY CHARGERS
ARE DESIGNED FOR THE BEST PERFORMANCE WITH OEM FACTORY APPROVED BATTERIES.
APPROVED JLG REPLACEMENT BATTERIES ARE AVAILABLE
THROUGH JLG’S AFTERMARKET PARTS DISTRIBUTION CENTERS
OR JLG'S AFTERMARKET PROGRAMS. FOR ASSISTANCE WITH
PROPER BATTERY REPLACEMENT, PLEASE CONTACT YOUR
LOCAL JLG SUPPORT OFFICE.
BATTERIES APPROVED BY JLG HAVE BEEN TESTED FOR COMPATIBILITY WITH THE ALGORITHM PROGRAMMING OF THE
DELTA Q BATTERY CHARGER TO OPTIMIZE BATTERY LIFE AND
MACHINE CYCLE TIMES. THE USE OF NON APPROVED BATTERIES IN YOUR JLG EQUIPMENT MAY RESULT IN PERFORMANCE
ISSUES OR BATTERY CHARGER FAULT CODES. JLG ASSUMES
NO RESPONSIBILITY FOR SERVICE OR PERFORMANCE ISSUES
ARISING FROM THE USE OF NON APPROVED BATTERIES.
Battery Quick-Disconnect (If Equipped)
Machines equipped with the battery
quick-disconnect allow all machine
power to be easily disconnected at
the batteries without removing battery cables from the battery posts. To disconnect power,
locate the RED quick-disconnect connector on top of the
batteries inside the battery compartment and pull halves
apart.
1-2– JLG Lift –3121273
Electrical SystemMotors
SECTION 1 - SPECIFICATIONS
Table 1-6. Electrical System Specifications
DESCRIPTIONALL MACHINES
Electrical System Voltage (DC)24V - DC
Battery Charger: (1001129847)
Input:
AC Input Voltage:
Nominal AC Input Voltage:
Input Frequency:
Max. AC Input Current:
Ingress Protection:
Operating Temperature:
Output:
Nominal DC Output Voltage:
M ax . DC O u tp u t V o lt a ge :
Max DC Output Current:
Max. Interlock Current:
Protection:
Output Reverse Polarity:
Output Shor t Circuit:
AC Overload:
DC Overload:
DC to AC Inver ter - Output Rating:
(OPTION)
85-265V AC
120VAC / 230VAC RMS
45 - 65Hz
12A - RMS @ 108V AC
IP46 NEMA4 Type 4
-22°F (-30°C) to 122°F (+50°C)
24V
33.6V
25A
1A
Electronic Protection-Auto Reset
Electronic Protection-Auto Reset
Current Limited
Current Limited
• Hydraulic Pump/Electric Motor Assembly
(All Models)
Type: Series Wound Permanent Magnet 24V DC
Power: 3kW
Travel Speed
Table 1-7. Travel Speed
ELEVATED SPEEDMAXIMUM SPEED (PLATFORM LOWERED)
MODEL
Mph
1932RS/6RS0.359 - 650.52.5 6.85 - 8.54
3246RS/10RS0.357 - 650.52.5 6.85 - 8.54
Sec/25 ft
(Sec/7.6 m)
UNIT OF MEASURE
KphMph
Sec/25 ft
(Sec/7.6 m)
Lift Speed
NOTE: Maximum rated load in platform on measured lift speeds. Platform fully raised and lowered.
Table 1-8. Lift Speed
MODEL
1932RS/6RS22 - 2921 - 31
3246RS/10RS55 - 6540 - 50
LIFT UP
(SECONDS)
LIFT DOWN
(SECONDS)
Kph
3121273– JLG Lift –1-3
SECTION 1 - SPECIFICATIONS
1.2CRITICAL STABILITY WEIGHTS
DO NOT REPLACE ITEMS CRITICAL TO STABILITY, SUCH AS BATTERIES OR SOLID TIRES, WITH ITEMS OF DIFFERENT WEIGHT
OR SPECIFICATION. DO NOT MODIFY UNIT IN ANY WAY TO
AFFECT STABILITY.
Table 1-9. Critical Stability Weights
COMPONENT1932RS/6RS3248RS/10RS
Wheel and Tire Assembly ( ea c h) Fr o nt :
Wheel/Tire and
Drive Assembly (each)
Batteries (each) Standard:
Batteries (combined)
Standard :
Rear:
AGM:
AGM:
21.6 lb. (9.8 kg)
21.6 lb. (9.8 kg)
113 lb. (51.3 kg)134 lb. (60.8 kg)
248 lb. (111.1 kg)
43 lb. (19.5 kg)
40.5 lb. (18.4 kg)
62 lb. (28.1 kg)
65 lb. (29.5 kg)
260 lb. (118 kg)
1.3LUBRICATION
Hydraulic Oil
NOTE: Hydraulic oils must have anti-wear qualities at least
to API Service Classification GL-3, and sufficient
chemical stability for mobile hydraulic system service. JLG Industries recommends DTE 10 or Excel
15 hydraulic oil.
Aside from JLG recommendations, it is not advisable
to mix oils of different brands or types, as they may
not contain the same required additives or be of
comparable viscosities. If use of hydraulic oil other
than DTE 10 or Excel 15 is desired, contact JLG
Industries for proper recommendations.
.
Table 1-10. Hydraulic Oil
Table 1-11. Lubrication Specifications
KEYSPECIFICATIONS
Multipurpose Grease having a minimum dripping
MPG
EPGL
HO
SPECIFICATION
ISO Viscosity
Grade
Spec Gravity API31.90.950—
Pour Point, Max
Flash Point, Min.
VISCOSITY SPECIFICATIONS
at 40°C15 cSt
at 100°C4.1 cSt
at 100°F80 SUS
at 210°F43 SUS
cp at -30°F3.2
Viscosity Index140147189
Operating Temp—-20°F (29°C) - 200°F (392°C)
point of 350°F. Excellent water resistance and adhesive qualities, and being of extreme pressure type.
(Timken OK 40 pounds minimum.)
Extreme Pressure Gear Lube (oil) meeting API service
c la ss if ic a ti on GL- 5 or MI L-S pe c MI L-L- 21 0 5.
JLG Recommends - Mobil DTE 10, EXCEL 15 or
ATF - Automatic Transmission Fluid
Mobil EAL ENVIRONSYN H 32 (IN U.S.A.)
Mobil EAL HYDRAULIC OIL 32 (IN EUROPE)
Table 1-12. Hydraulic Oil Specifications
MOBIL
DTE 10
EXCEL 15
#15#32#32
-40°F
(-40°C)
330°F
(166°C)
MOBIL EAL
ENVIRONSYN
H 32
-59°F
(-51°C)
514.4 °F
(268°C)
33.1 cSt32 cSt
6.36 cSt7 cSt
——
——
——
MOBIL EAL
HYDRAULIC
(-39°C)
478°F (248°C)
OIL 32
-38.2°F
1001102685_3
Pressure Settings
Table 1-13. Pressure Settings
HYDRAULIC SYSTEM OPERATING
TEMPERATURE RANGE
0°F to +23°F (-18°C to -5°C)10W
0°F to 210°F (-18°C to + 99°C)10W-20, 10W-30
50°F to 210°F (+10°C to +210°C )20W-20
SAE VISCOSITY GRADE
1.4LIMIT SWITCHES
MODELMAIN RELIEFLIFT RELIEF
1932RS/6RS
3246RS/10RS
Illuminates a light on the platform control, sounds an alarm
and cuts out lift up and drive when the machine is out of
2300 psi
(158 bar)
2500 psi
(172 bar)
2300 psi
(158 bar)
2500 psi
(172 bar)
STEER
RELIEF
1000 psi
(69 bar)
1000 psi
(69 bar)
Tilt Alarm
1-4– JLG Lift –3121273
SECTION 1 - SPECIFICATIONS
M12 - 1.5 x 22
22
level and above stowed depending on model and specifications.
Table 1-14. Tilt Activation Setting
PLATFORM
ELEVATION
@ TILT
ACTIVATION
(± 6 IN.)
69 in.
(1.75 m)
88.5 in.
(2.25 m)
88.5 in.
(2.25 m)
MODEL
1932RS/6RS - ALL
3248RS/10RS ANSI/CSA/JPN
3248RS/10RS - CE
TILT
SETTING
(FRONT TO
BACK)
3°1.5°
3°2°
3°1.5°
TILT
SETTING
(SIDE TO
SIDE)
High Drive Speed Cutout
High drive speed is cut out @ when the platform is raised
above the preset height per model as follows:
NOTE: These figures are given with a tolerance of ± 6 in.
(0.15 m).
Table 1-15. High Drive Cutout Height
MODEL
1932RS/6RS68.9 in. (1.75m)
3248RS/10RS88.5 in. (2.25 m)
HIGH DRIVE SPEED
CUTOUT HEIGHT
DRIVE SPEED
REDUCTION
2.5 mph (4 kph) to
0.3 mph (0.5 kph)
1.6MAJOR COMPONENT WEIGHTS
Table 1-17. Major Component Weights
COMPONENT1932RS/6RS3246RS/10RS
Platform
Manual Platform Extension
Arm Assembly - (Includes
Lift Cylinder)
Chassis w/Wheel/Tire and
Drive Assembly
240 lb.
(109 kg)
115 lb.
(52 kg)
520 lb.
(236 kg)
2,125 lb.
(964 kg)
412 lb.
(187 kg)
150 lb.
68 kg
1,806 lb.
(820 kg)
2,702 lbs
(1226 kg)
1.7TORQUE REQUIREMENTS
Self locking fasteners, such as nylon insert and thread
deforming locknuts, are not intended to be reinstalled
after removal. Always use new replacement hardware
when installing locking fasteners.
Table 1-18. Torque Requirements
DESCRIPTION
Front Wheel Spindle Nut
Wheel Bolts
TORQUE VALUE
(DRY)
30-40 ft lb
(40-54 Nm)
105 -120 ft lb
(142-163 Nm)
INTERVAL
HOURS
50
50
1.5CYLINDER SPECIFICATIONS
Table 1-16. Cylinder Specifications
DESCRIPTION1932RS/6RS3246RS/10RS
Lift Cylinder Bore
Lift Cylinder Stroke
Lift Cylinder Rod Diameter
Steer Cylinder Bore
Steer Cylinder Stroke
Steer Cylinder Rod Diameter
2.48 in.
(63 mm)
43.3 in.
(1100 mm)
1.77 in.
(45 mm)
1.5 in.
(38.1 mm)
4.92 in
(125 mm)
0.75m in.
(19.05 mm)
3.93 in.
(100 mm)
48.5 in.
(1232 mm)
2.48 in.
(63 mm)
1.57 in.
(40 mm)
6.77 in.
(172 mm)
0.78 in.
(20 mm)
NOTE: Anytime a wheel bolt is replaced, be sure one of the
same length is used. Use bolt shown below on
wheels that use the 1/4" (6.4mm) ring.
NOTE: After tightening the spindle nut to the proper torque,
loosen completely until you can turn by hand. Finger
tighten nut by hand without rotating hub. Install cotter
pin by backing nut off, if necessary, in order to line up
slot.
When maintenance becomes necessary or a fastener has loosened, refer to the Torque Charts on
page 1-6 to determine proper torque value.
4. CLAMP LOAD LISTED FOR SHCS IS SAME AS GRADE 8 OR CLASS 10.9 AND DOES NOT
REPRESENT FULL STRENGTH CAPABILITY OF SHCS. IF HIGHER LOAD IS REQUIRED,
ADDITIONAL TESTING IS REQUIRED.
*3. ASSEMBLY USES HARDENED WASHER OR FASTENER IS PLACED AGAINST PLATED
STEEL OR RAW ALUMINUM
CLASS 8.8 METRIC BOLTS
CLASS 8 METRIC NUTS
NOTES: 1. THESE TORQUE VALUES DO NOT APPLY TO CADMIUM PLATED FASTENERS
2. ALL TORQUE VALUES ARE STATIC TORQUE MEASURED PER STANDARD AUDIT
METHODS TOLERANCE = ±10%
2.1 MACHINE PREPARATION, INSPECTION,
AND MAINTENANCE
General
This section provides the necessary information needed
by those personnel that are responsible to place the
machine in operation readiness and maintain its safe
operating condition. For maximum service life and safe
operation, ensure that all the necessary inspections and
maintenance have been completed before placing the
machine into service.
Preparation, Inspection, and Maintenance
It is important to establish and conform to a comprehensive inspection and preventive maintenance program. The
following table outlines the periodic machine inspections
and maintenance recommended by JLG Industries, Inc.
Consult your national, regional, or local regulations for further requirements for aerial work platforms. The frequency
of inspections and maintenance must be increased as
environment, severity and frequency of usage requires.
Pre-Start Inspection
It is the User’s or Operator’s primary responsibility to perform a Pre-Start Inspection of the machine prior to use
daily or at each change of operator. Reference the Operation and Safety Manual for completion procedures for the
Pre-Start Inspection. The Operation and Safety Manual
must be read in its entirety and understood prior to performing the Pre-Start Inspection.
Pre-Delivery Inspection and Frequent
Inspection
The Pre-Delivery Inspection and Frequent Inspection shall
be performed by a qualified JLG equipment mechanic.
JLG Industries, Inc. recognizes a qualified JLG equipment
mechanic as a person who, by possession of a recognized degree, certificate, extensive knowledge, training, or
experience, has successfully demonstrated the ability and
proficiency to service, repair, and maintain the subject
JLG product model.
The Pre-Delivery Inspection and Frequent Inspection procedures are performed in the same manner, but at different times. The Pre-Delivery Inspection shall be performed
prior to each sale, lease, or rental delivery. The Frequent
Inspection shall be accomplished for each machine in service for 3 months or 150 hours (whichever comes first);
out of service for a period of more than 3 months; or when
purchased used. The frequency of this inspection must be
increased as environment, severity and frequency of
usage requires.
Reference the JLG Pre-Delivery and Frequent Inspection
Form and the Inspection and Preventative Maintenance
Schedule for items requiring inspection during the performance of these inspections. Reference the appropriate
areas of this manual for servicing and maintenance procedures.
Annual Machine Inspection
JLG recommends that the Annual Machine Inspection be
performed by a Factory-Trained Service Technician on an
annual basis, no later than thirteen (13) months from the
date of the prior Annual Machine Inspection. JLG Industries, Inc. recognizes a Factory-Trained Service Technician
as a person who has successfully completed the JLG Service Training School for the subject JLG product model.
Reference the machine Service and Maintenance Manual
and appropriate JLG inspection form for performance of
this inspection.
Reference the JLG Annual Machine Inspection Form and
the Inspection and Preventative Maintenance Schedule for
items requiring inspection during the performance of this
inspection. Reference the appropriate areas of this manual for servicing and maintenance procedures.
For the purpose of receiving safety-related bulletins, it is
important that JLG Industries, Inc. has updated ownership
information for each machine. When performing each
Annual Machine Inspection, notify JLG Industries, Inc. of
the current machine ownership.
Preventative Maintenance
In conjunction with the specified inspections, maintenance shall be performed by a qualified JLG equipment
mechanic. JLG Industries, Inc. recognizes a qualified JLG
equipment mechanic as a person who, by possession of a
recognized degree, certificate, extensive knowledge, training, or experience, has successfully demonstrated the
ability and proficiency to service, repair, and maintain the
subject JLG product model.
Reference the Preventative Maintenance Schedule and
the appropriate areas of this manual for servicing and
maintenance procedures. The frequency of service and
maintenance must be increased as environment, severity
and frequency of usage requires.
3121273– JLG Lift –2-1
SECTION 2 - GENERAL
NOTICE
Table 2-1. Inspection and Maintenance Responsibilities
Ty peFrequency
Pre-Start
Inspection
Pre-Delivery
Inspection
Frequent
Inspection
Annual Machine
Inspection
Preventative
Maintenance
In service for 3 months or 150 hours, whichever comes
first; or Out of service for a period of more than 3 months;
Annually, no later than 13 months from the date of the prior
At intervals as specified in the Ser vice and Maintenance
Prior to use each day; or
At each Operator change.
Prior to each sale, lease, or
rental deliver y.
or Purchased used.
inspection.
Manual.
2.2 PREVENTIVE MAINTENANCE AND
INSPECTION SCHEDULE
The preventive maintenance and inspection checks are
listed and defined in the following table. This table is
divided into two basic parts, the “AREA” to be inspected
and the “INTERVAL” at which the inspection is to take
place. Under the “AREA” portion of the table, the various
systems along with the components that make up that
system are listed. The “INTERVAL” portion of the table is
divided into five columns representing the various inspection time periods. The numbers listed within the interval
column represent the applicable inspection code for
which that component is to be checked.
The checks and services listed in this schedule are not
intended to replace any local or regional regulations that
may pertain to this type of equipment nor should the lists
be considered as all inclusive. Variances in interval times
may occur due to climate and/or conditions and depending on the location and use of the machine.
JLG INDUSTRIES REQUIRES THAT A COMPLETE ANNUAL
INSPECTION BE PERFORMED IN ACCORDANCE WITH THE
"ANNUAL MACHINE INSPECTION REPORT" FORM.
NOTE: This machine requires periodic safety and mainte-
nance inspections by a qualified JLG mechanic.
Notify JLG dealer if inspection is overdue.
Primary
Responsibility
User or OperatorUser or OperatorOperation and Safety Manual
Owner, Dealer, or
User
Owner, Dealer, or
User
Owner, Dealer, or
User
Owner, Dealer, or
User
4. Check for cracked or broken welds.
5. Operates properly.
6. Returns to neutral or "off" position when released.
7. Clean and free of debris.
8. Interlocks function properly.
9. Check for signs of leakage.
10. Decals installed and legible.
11. Check for proper fluid level.
12. Check for chafing and proper routing.
13. Check for proper tolerances.
14. Properly lubricated.
15. Torqued to proper specification.
16. No gouges, excessive wear, or cords showing.
17. Properly inflated and seated around rim.
18. Proper and authorized components.
19. Fully charged.
20. No loose connections, corrosion, or abrasions.
21. Verify.
22. Perform.
23. Sealed properly.
24. Overrides Platform controls.
25. Remove pump motor cover and blow away any
brush wear dust from cover, brushes, and brush
holder assembly.
Service
Qualification
Qualified JLG
Mechanic
Qualified JLG
Mechanic
Factory-Trained
Service Technician
(recommended)
Qualified JLG
Mechanic
Reference
Service and Maintenance Man-
ual and applicable JLG inspec-
tion form.
Service and Maintenance Man-
ual and applicable JLG inspec-
tion form.
Service and Maintenance Man-
ual and applicable JLG inspec-
tion form.
Service and Maintenance Man-
ual
Footnotes:
Maintenance and Inspection Schedule Codes:
1. Check for proper and secure installation.
2. Visual inspection for damage, cracks, distortion, or
excessive wear.
3. Check for proper adjustment.
(a) Prior to each sale, lease, or delivery
(b) In service for 3 months; or Out of service for 3 months
or more; or Purchased used
(c) Annually, no later than 13 months from the date of the
prior inspection
All Decals/Placards Installed, Secure, Legible2121
Annual Machine Inspection Due21
No Unauthorized Modifications or Additions2121
All Relevant Safety Publications Incorporated2121, 22
General Structural Condition and Welds2, 42, 4
All Fasteners, Pins, Shields, and Covers1, 2
Grease and Lubricate to Specifications2222
Function Test of All Systems2222
Paint and Appearance77
N ot i f y J L G o f ch a n ge i n M a ch i n e O w ne r sh i p2 2
INTERVAL
PRE-DELIVERY (a)
OR FREQUENT (b)
INSPECTION
2121
ANNUAL (c)
(YEARLY)
INSPECTION
**Replace when system performance is degraded.
*** Every two years, drain and remove hydraulic oil reservoir , clean pick-up s creen, refill with fresh hydraulic fluid.
2-4– JLG Lift –3121273
SECTION 2 - GENERAL
2.3 SERVICE AND GUIDELINES
General
The following information is provided to assist you in the
use and application of servicing and maintenance procedures contained in this book.
Safety and Workmanship
Your safety, and that of others, is the first consideration
when engaging in the maintenance of equipment. Always
be conscious of weight. Never attempt to move heavy
parts without the aid of a mechanical device. Do not allow
heavy objects to rest in an unstable position. When raising
a portion of the equipment, ensure that adequate support
is provided.
Cleanliness
1. The most important single item in preserving the
long service life of a machine is to keep dirt and foreign materials out of the vital components. Precautions have been taken to safeguard against this.
Shields, covers, seals, and filters are provided to
keep air, fuel, and oil supplies clean; however, these
items must be maintained on a scheduled basis in
order to function properly.
2. At any time when air, fuel, or oil lines are disconnected, clean adjacent areas as well as the openings and fittings themselves. As soon as a line or
component is disconnected, cap or cover all openings to prevent entry of foreign matter.
3. Clean and inspect all parts during servicing or maintenance, and assure that all passages and openings
are unobstructed. Cover all parts to keep them
clean. Be sure all parts are clean before they are
installed. New parts should remain in their containers until they are ready to be used.
Component Disassembly and Reassembly
When disassembling or reassembling a component, complete the procedural steps in sequence. Do not partially
disassemble or assemble one part, then start on another.
Always recheck your work to assure that nothing has been
overlooked. Do not make any adjustments, other than
those recommended, without obtaining proper approval.
Pressure-Fit Parts
When assembling pressure-fit parts, use an anti-seize or
molybdenum disulfide base compound to lubricate the
mating surface.
Bearings
1. When a bearing is removed, cover it to keep out dirt
and abrasives. Clean bearings in nonflammable
cleaning solvent and allow to drip dry. Compressed
air can be used but do not spin the bearing.
2. Discard bearings if the races and balls (or rollers)
are pitted, scored, or burned.
3. If bearing is found to be serviceable, apply a light
coat of oil and wrap it in clean (waxed) paper. Do not
unwrap reusable or new bearings until they are
ready to install.
4. Lubricate new or used serviceable bearings before
installation. When pressing a bearing into a retainer
or bore, apply pressure to the outer race. If the bearing is to be installed on a shaft, apply pressure to the
inner race.
Gaskets
Check that holes in gaskets align with openings in the
mating parts. If it becomes necessary to hand-fabricate a
gasket, use gasket material or stock of equivalent material
and thickness. Be sure to cut holes in the right location, as
blank gaskets can cause serious system damage.
Components Removal and Installation
1. Use adjustable lifting devices, whenever possible, if
mechanical assistance is required. All slings (chains,
cables, etc.) should be parallel to each other and as
near perpendicular as possible to top of part being
lifted.
2. Should it be necessary to remove a component on
an angle, keep in mind that the capacity of an eyebolt or similar bracket lessens, as the angle between
the supporting structure and the component
becomes less than 90°.
3. If a part resists removal, check to see whether all
nuts, bolts, cables, brackets, wiring, etc., have been
removed and that no adjacent parts are interfering.
Bolt Usage and Torque Application
1. Self locking fasteners, such as nylon insert and
thread deforming locknuts, are not intended to be
reinstalled after removal. Always use new replacement hardware when installing locking fasteners.
2. Use bolts of proper length. A bolt which is too long
will bottom before the head is tight against its related
part. If a bolt is too short, there will not be enough
thread area to engage and hold the part properly.
When replacing bolts, use only those having the
same specifications of the original, or one which is
equivalent.
3. Unless specific torque requirements are given within
the text, standard torque values should be used on
3121273– JLG Lift –2-5
SECTION 2 - GENERAL
heat-treated bolts, studs, and steel nuts, in accordance with recommended shop practices. (See
Torque Chart Section 1.)
Hydraulic Lines and Electrical Wiring
Clearly mark or tag hydraulic lines and electrical wiring, as
well as their receptacles, when disconnecting or removing
them from the unit. This will assure that they are correctly
reinstalled.
Hydraulic System
1. Keep the system clean. If evidence of metal or rubber particles are found in the hydraulic system, drain
and flush the entire system.
2. Disassemble and reassemble parts on a clean work
surface. Clean all metal parts with non-flammable
cleaning solvent. Lubricate components, as
required, to aid assembly.
Lubrication
Service applicable components with the amount, type,
and grade of lubricant recommended in this manual, at
the specified intervals. When recommended lubricants are
not available, consult your local supplier for an equivalent
that meets or exceeds the specifications listed.
Battery
Clean battery, using a non-metallic brush and a solution of
baking soda and water. Rinse with clean water. After
cleaning, thoroughly dry battery and coat terminals with
an anti corrosion compound.
2.4 LUBRICATION AND INFORMATION
Hydraulic System
1. The primary enemy of a hydraulic system is contamination. Contaminants enter the system by various
means, e.g., using inadequate hydraulic oil, allowing
moisture, grease, filings, sealing components, sand,
etc., to enter when performing maintenance, or by
permitting the pump to cavitate due to insufficient
quantity of oil in supply tube.
2. The design and manufacturing tolerances of the
component working parts are very close, therefore,
even the smallest amount of dirt or foreign matter
entering a system can cause wear or damage to the
components and generally results in faulty operation. Every precaution must be taken to keep
hydraulic oil clean, including reserve oil in storage.
Hydraulic system filters should be checked,
cleaned, and/or replaced as necessary, at the specified intervals required. Always examine filters for evidence of metal particles.
3. Cloudy oils indicate a high moisture content which
permits organic growth, resulting in oxidation or corrosion. If this condition occurs, the system must be
drained, flushed, and refilled with clean oil.
4. It is not advisable to mix oils of different brands or
types, as they may not contain the same required
additives or be of comparable viscosities. Good
grade mineral oils, with viscosities suited to the
ambient temperatures in which the machine is operating, are recommended for use.
NOTE: Metal particles may appear in the oil or filters of new
machines due to the wear-in of meshing components.
Hydraulic Oil
1. Refer to Section 1 for recommendations for viscosity
ranges.
2. JLG recommends DTE10 or Excel 15 hydraulic oil,
which has an SAE viscosity of 10W-30 and a viscosity index of 152.
NOTE: Start-up of hydraulic system with oil temperatures
below -15°F (-26°C) is not recommended. If it is necessary to start the system in a sub-zero environment, it will be necessary to heat the oil with a low
density, electrical heater to a minimum temperature
of -15°F (-26°C).
2-6– JLG Lift –3121273
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