HYDRAULIC OIL
Using dipstick, measure oil level, and oil if
necessary.
When changing hydraulic oil, clean
suction strainer(screwed into outlet port
pipe) and line filter(screwed into inlet pipe).
Line filter uses paper element, so replace
periodically(every 6 months or 1000
hours)
6-22
GROUP 2 OPERATIONAL CHECKS AND TROUBLESHOOTING
1. OPERATIONAL CHECKS
CHECK ITEM
Check visually for deformation, cracks or
damage of rod.
Set mast vertical and raise 1m from
ground. Wait for 10 minutes and measure
hydraulic drift(amount forks move down
and amount mast tilts forward).
Â
CCheck condition
- Hydraulic oil : Normal operating temp
- Mast substantially vertical.
- Rated capacity load.
Â
Hydraulic drift
- Down(Downward movement of forks)
: Within 100
mm
(3.9
in
)
- Forward(Extension of tilt cylinder)
: Within 5
Á
If the hydraulic drift is more than the
specified value, replace the control valve
or cylinder packing.
Check that clearance between tilt cylinder
bushing and mounting pin is within
standard range.
(1)
(2)
(3)
1
1)
2)
CONTROL VALVE
Raise forks to maximum height and
measure oil relief pressure.
Check that oil relief pressure is 190
kgf/cm
2
.
(2702
psi
)
15L7AHS18
15L7AHS19
15L7MHS20
3)
(1)
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