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27
1.  Do 
the CHECKING HYDRAULIC 
FLUID procedure in this manual. 
If necessary, add hydraulic ! uid.
3.  Check pump oil " lter in the reservoir 
(FIG. 27-1). Clean or replace " lter if 
necessary.
4.  Check for dirty raising relief valve 
(FIG. 27-1). Clean or replace valve 
if necessary.
2.  Check for structural damages 
and replace worn parts.
CHECKING THE RAISING RELIEF VALVE
FIG. 27-1
PLATFORM WILL NOT RAISE, BUT MOTOR RUNS
ADJUSTMENT
COVER
RELIEF
V
ALVE
RESERVOIR
Keep dirt, water and other contaminants 
from entering the hydraulic system. Be-
fore 
opening the hydraulic ! uid reservoir 
" 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