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GROUP 2 OPERATIONAL CHECKS AND TROUBLESHOOTING
1. OPERATIONAL CHECKS
1)
CHECK ITEM
(1)
Check visually for deformation, cracks or
damage of rod.
(2)
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).
·Check condition
- Hydraulic oil : Normal operating temp
- Mast substantially vertical.
- Rated capacity load.
·H
H
ydraulic drift
- Down(Downward movement of forks)
: Within 100mm (3.9in)
- Forward(Extension of tilt cylinder)
: Within 5。
If the hydraulic drift is more than the
(3)
specified value, replace the control valve
or cylinder packing.
Check that clearance between tilt cylinder
bushing and mounting pin is within
standard range.
Standard
Under 0.6 (0.02)
2)
HYDRAULIC OIL
(1)
Using dipstick, measure oil level, and oil if
necessary.
(2)
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
1200 hours)
3)
CONTROL VALVE
(1)
Raise forks to maximum height and
measure oil pressure.
Check that oil pressure is 210kgf/cm
mm (in)
2
.
(2990psi)
6-31
Within 5 (after 10min)
Dipstick
Hot
Normal
Cold
Drain plug
Filter
110D7EHS14
110D7EHS15
100D7HS18
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