JLG 1230ES Service Manual - Manual (Page 27)

SECTION 2 - GENERAL SERVICE INFORMATION
3121222 – JLG Lift – 2-5
2.3 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 component 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 ade-
quate support is provided.
NEVER WORK UNDER AN ELEVATED PLATFORM UNTIL PLAT-
FORM HAS BEEN SAFELY RESTRAINED FROM ANY MOVEMENT
BY BLOCKING OR OVERHEAD SLING.
Cleanliness
The most important single item in preserving the long ser-
vice 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 fil-
ters are provided to keep the wheel bearings, mast sec-
tions and oil supply clean; however, these items must be
maintained on a scheduled basis in order to function
properly.
At any time when oil lines are disconnected, clear adja-
cent areas as well as the openings and fittings them-
selves. As soon as a line or component is disconnected,
cap or cover all openings to prevent entry of foreign mat-
ter.
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
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.
Should it be necessary to remove a component on an
angle, keep in mind that the capacity of an eyebolt or sim-
ilar bracket lessens, as the angle between the supporting
structure and the component becomes less than 90
degrees.
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.
Figure 2-1. Platform Mast Support Tool.
1. Elevate platform/outer mast (1) approximately 3 ft. (1m).
2. Place (JLG P/N-1001094004) mast support tool (2) between
the mast and the front frame by hooking the bracket (3) over
the front frame plate at bottom as shown above.
3. Lower the platform until the bottom edge of the platform/outer
mast section (1) is resting on the hook bracket (4) at the top
of the mast support tool.