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41
PLATFORM WILL NOT RAISE, BUT MOTOR RUNS
1. Do the CHECKING HYDRAULIC FLUID
procedure in this manual. If necessary,
add hydraulic fl uid.
2. Check for structural damage and replace
worn parts.
3. Check pump inlet fi lter in the reser-
voir (FIGS. 41-1). Clean or replace
fi lter, if necessary.
Keep dirt, water and other contaminants
from entering the hydraulic system. Be-
fore opening the hydraulic fl uid reservoir
fi ller cap, drain plug and hydraulic lines,
clean up contaminants that can get in
the openings. Also, protect the openings
from accidental contamination during
maintenance.
CAUTION
CHECKING THE RAISING RELIEF VALVE
(GRAVITY DOWN POWER UNIT)
FIG. 41-1
4. Check if pump relief valve is dirty. Clean or
replace relief valve, if necessary (FIG. 41-1).
5. After replacing or reinstalling the pump relief
valve, reset the valve to 2750 psi. See
Relief Valve Pressure Adjustment in this
manual.
ADJUSTMENT
COVER
RELIEF
VALVE
RESERVOIR
(PUMP INLET
FILTER INSIDE)
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