Jlg 40H Service Manual User Manual Page 21
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- Table of contents
- TROUBLESHOOTING
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SECTION 2 - PROCEDURES
3120240 – JLG Lift – 2-1
SECTION 2. PROCEDURES
2.1 GENERAL.
This section provides information necessary to perform
maintenance on the aerial platform. Descriptions, tech-
niques and specific procedures are designed to provide
the safest and most efficient maintenance for use by per-
sonnel responsible for ensuring the correct installation
and operation of machine components and systems.
WHEN AN ABNORMAL CONDITION IS NOTED AND PROCEDURES
CONTAINED HEREIN DO NOT SPECIFICALLY RELATE TO THE
NOTED IRREGULARITY, WORK SHOULD BE STOPPED AND
TECHNICALLY QUALIFIED GUIDANCE OBTAINED BEFORE WORK
IS RESUMED.
The maintenance procedures included consist of servic-
ing and component removal and installation, disassembly
and assembly, inspection, lubrication and cleaning. Infor-
mation on any special tools or test equipment is also pro-
vided where applicable.
2.2 SERVICING AND MAINTENANCE
GUIDELINES.
General.
The following information is provided to assist you in the
use and application of servicing and maintenance proce-
dures contained in this chapter.
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 for-
eign materials out of the vital components. Precau-
tions 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 discon-
nected, clear adjacent areas as well as the openings
and fittings themselves. As soon as a line or compo-
nent is disconnected, cap or cover all openings to
prevent entry of foreign matter.
3. Clean and inspect all parts during servicing or main-
tenance, 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 contain-
ers until they are ready to be used.
Components Removal and Installation.
4. 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.
5. Should it be necessary to remove a component on
an angle, keep in mind that the capacity of an eye-
bolt or similar bracket lessens, as the angle between
the supporting structure and the component
becomes less than 90 degrees.
6. 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.
Component Disassembly and Reassembly.
When disassembling or reassembling a component, com-
plete 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
- October 11, 2001 1
- PRECAUTIONS 3
- REVISON LOG 4
- TABLE OF CONTENTS 5
- (Continued) 6
- SECTION 3 - TROUBLESHOOTING 6
- LIST OF FIGURES 6
- FIGURE NO. TITLE PAGE NO 6
- (INTENTIONAL BLANK PAGE) 8
- SECTION 1. SPECIFICATIONS 9
- 1-2 – JLG Lift – 3120240 10
- 3120240 – JLG Lift – 1-3 11
- SECTION 1 - SPECIFICATIONS 12
- Deutz F3L912/F3L1011 Engine 12
- Wisconsin VG4D Engine 12
- 1-8 – JLG Lift – 3120240 16
- 3120240 – JLG Lift – 1-9 17
- SECTION 2. PROCEDURES 21
- 2-2 – JLG Lift – 3120240 22
- 3120240 – JLG Lift – 2-3 23
- 2-4 – JLG Lift – 3120240 24
- 3120240 – JLG Lift – 2-5 25
- 2-6 – JLG Lift – 3120240 26
- 3120240 – JLG Lift – 2-7 27
- 2.9 CYLINDER REPAIR 29
- Disassembly 29
- Cleaning and Inspection 30
- Assembly 30
- 2.10 CYLINDER REMOVAL AND 32
- INSTALLATION 32
- Telescope Cylinder Removal 32
- 2-14 – JLG Lift – 3120240 34
- Inspection 36
- 3120240 – JLG Lift – 2-19 39
- 2-20 – JLG Lift – 3120240 40
- 3120240 – JLG Lift – 2-21 41
- 2-22 – JLG Lift – 3120240 42
- Linkage 43
- Mounting-Controller 44
- Power Distribution 44
- Troubleshooting 48
- 2.17 THROTTLE CHECKS AND 49
- ADJUSTMENTS - DEUTZ F2L511 49
- ENGINE. (SEE FIGURE 2-8.) 49
- 3120240 – JLG Lift – 2-33 53
- 3120240 – JLG Lift – 2-35 55
- ADJUSTMENT 78
- 2.23 SWING BEARING 79
- Wear Tolerance 80
- Installation 81
- Swing Bearing Torque Values 82
- Repair 85
- 2.26 SWING DRIVE BRAKE, MICO 91
- (MACHINES BUILT PRIOR TO MAY 91
- 1992). (SEE FIGURE 2-39.) 91
- 2-72 – JLG Lift – 3120240 92
- Bleeding 94
- 3120240 – JLG Lift – 2-75 95
- 3120240 – JLG Lift – 2-77 97
- 3120240 – JLG Lift – 2-79 99
- SECTION 2 - PROCEDURES 100
- 3120240 – JLG Lift – 2-81 101
- 3120240 – JLG Lift – 2-83 103
- 3120240 – JLG Lift – 2-85 105
- 3120240 – JLG Lift – 2-87 107
- 3120240 – JLG Lift – 2-89 109
- INSPECTION SCHEDULE 110
- 2-92 – JLG Lift – 3120240 112
- SECTION 3. TROUBLESHOOTING 113
- SECTION 3 - TROUBLESHOOTING 114
- JLG Worldwide Locations 152
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