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4 — MAINTENANCE
4-5
4-4 HYDRAULIC SYSTEM
Hydraulic system maintenance varies with equipment use and the environment in which
the boom lift is used. Constant attention to keep the oil clean and the reservoir properly
filled will help prevent possible damage to the system. Hydraulic diagrams are provided
in this section for general reference.
WARNING
Hydraulic system pressure settings are factory settings and should not need read-
justment. The only time readjustment is needed is when a component in the hy-
draulic control circuit is replaced. Only the adjustments covered in this manual
are permitted. If you believe that any other hydraulic component needs adjust-
ment, notify Bil-Jax for additional instruction. Hydraulic motions are quiet,
quick, and can be dangerous to persons on or near the lift vehicle. Failure to heed
this warning can result in serious injury or death.
Hydraulic System Inspection
Check the hydraulic hose and fittings for leaks and damage daily. Tighten or replace as
necessary to prevent hydraulic oil loss. Secure hoses and lines as needed to prevent rub-
bing and chafing.
Fluid Check and Replacement
The oil level should be checked with the engine or motor off, the boom down, and the
trailer on a level surface. Pull the dipstick out of the reservoir (Figure 4-4) and wipe off
any oil with a clean shop cloth, then reinsert the dipstick. Pull the dipstick to check the
oil level. The oil level should be between the full and add oil marks on the dipstick.
HYDRAULIC
RESERVOIR
DIPSTICK
Figure 4-4. Hydraulic Reservoir