SECTION 2 - GENERAL
2-2
– JLG Lift –
3121659
2.2
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 con-
scious 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 mate-
rials 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,
clear adjacent areas as well as the openings and fittings
themselves. As soon as a line or component is discon-
nected, cap or cover all openings to prevent entry of for-
eign matter.
3.
Clean and inspect all parts during servicing or mainte-
nance, 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.
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 sup-
porting structure and the component becomes less
than 90 degrees.
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.
Table 2-1. Inspection and Maintenance
Type
Frequency
Primary
Responsibility
Service
Qualification
Reference
Pre-Start Inspection
Prior to use each day; or
At each Operator change.
User or Operator
User or Operator
Operation and Safety Manual
Pre-Delivery Inspection
Prior to each sale, lease, or
rental delivery.
Owner, Dealer, or User
Qualified JLG Mechanic
Service and Maintenance Manual
and applicable JLG inspection form.
Frequent Inspection
In service for 3 months or 150 hours, whichever
comes first; or
Out of service for a period of more than 3 months; or
purchased used.
Owner, Dealer, or User
Qualified JLG Mechanic
Service and Maintenance Manual
and applicable JLG inspection form.
Annual Machine Inspec-
tion
Annually, no later than 13 months from the date of
the prior inspection.
Owner, Dealer, or User
Factory-Trained Service
Technician
(Recommended)
Service and Maintenance Manual
and applicable JLG inspection form.
Preventive
Maintenance
At intervals as specified in the Service and Mainte-
nance Manual.
Owner, Dealer, or User
Qualified JLG Mechanic
Service and Maintenance Manual
Summary of Contents for JLG 450AJ
Page 2: ......
Page 32: ...SECTION 1 SPECIFICATIONS 1 18 JLG Lift 3121659 NOTES...
Page 80: ...SECTION 4 BOOM PLATFORM 4 2 JLG Lift 3121659 Figure 4 1 Boom Assembly...
Page 81: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 3 Figure 4 2 Main Boom Assembly Sheet 1 of 2...
Page 82: ...SECTION 4 BOOM PLATFORM 4 4 JLG Lift 3121659 Figure 4 3 Main Boom Assembly Sheet 2 of 2...
Page 83: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 5 Figure 4 4 Upper Boom Assembly...
Page 84: ...SECTION 4 BOOM PLATFORM 4 6 JLG Lift 3121659 Figure 4 5 Jib Assembly...
Page 118: ...SECTION 4 BOOM PLATFORM 4 40 JLG Lift 3121659 NOTES...
Page 156: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 5 38 JLG Lift 3121659 NOTES...
Page 164: ...SECTION 6 JLG CONTROL SYSTEM 6 8 JLG Lift 3121659 Figure 6 2 Tilt Sensor Location...
Page 169: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 13 Figure 6 7 Analyzer Connecting Points...
Page 181: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 25 Figure 6 19 Platform Module Sheet 1 of 2...
Page 182: ...SECTION 6 JLG CONTROL SYSTEM 6 26 JLG Lift 3121659 Figure 6 20 Platform Module Sheet 2 of 2...
Page 224: ...SECTION 6 JLG CONTROL SYSTEM 6 68 JLG Lift 3121659 NOTES...
Page 340: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 116 JLG Lift 3121659 NOTES...
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