Service And Repair Procedures - JLG Lull 1044C-54 II Series Service Manual

General Maintenance

Service And Repair Procedures

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CAUTION: Unless specifically told not to, lower the boom to the ground,
apply the parking brake, and stop the engine before servicing,
adjusting, or repairing the machine.
WARNING: Release all hydraulic pressure before doing any maintenance
or repairs to the hydraulic system.
WARNING: Liquid cooling systems build up pressure as the engine gets
hot. Before removing the radiator cap, stop the engine and let
the system cool. Remove the radiator cap only after the
coolant is cold.
• Be careful not to damage machined and polished surfaces.
• Tighten all bolts, fittings and connections to specifications.
• Avoid fires and explosive hazards.
• Handle all solvents and dry chemicals according to procedures identi-
fied on manufacturers' containers. Work in a well-ventilated area. Make
sure you know where fire extinguishers are kept and how to use them.
• Use an approved solvent to clean parts. Never use gasoline or diesel
fuel.
• Shut off the engine and electrical equipment while filling the fuel tank.
Use extra caution when fueling while the engine is hot. Always ground
the fuel nozzle against the filler neck to avoid sparks.
WARNING: Never smoke while handling fuel or working on the fuel
system. The fumes in an empty fuel container are explosive.
Never cut or weld on fuel lines, tanks, or containers.
• Avoid spilling fuel. If a spill occurs, wipe it up immediately.
• Never weld on forks, boom, support frame or overhead guard without
written consent from JLG.
• Install all guards, covers and shields after servicing. Repair or replace
any that are damaged.
• Refill systems with approved or recommended fluids. Start the engine
and check for leaks
WARNING: Diesel fuel or hydraulic fluid under pressure can penetrate the
skin or damage eyes. Fluid leaks under pressure may not be
visible. Use a piece of cardboard or wood to find leaks but do
not use your hand. Wear appropriate eye protection. If fluid
enters skin or eye, get medical attention immediately.
• Operate all controls and make sure the forklift is functioning properly.
Road test the machine if necessary. After testing, shut down and
recheck the work you performed. Recheck all fluid levels before releas-
ing machine for operation.
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