Komatsu WA250PT-5H, Operation & Maintenance Manual

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Operation
OPERATION
Check before starting engine, adjust
3-62
Adjustment 0.
Seat adjustment 0.
WARNING
When adjusting the position of the operator's seat, always set the safety lock lever to the LOCK position
to prevent any accidental contact to the control levers.
Always adjust the operator's seat before starting each operation or when the operators change shift.
When adjusting the seat, put your back against the backrest and adjust to a position where the brake pedal can
be fully depressed.
NOTICE
When pulling up levers (2) and (3), be careful not to pull up the switch box at the front by mistake.
There is danger that the switch box may be damaged.
When the left armrest is at the raised position, do not push down on the tip of the armrest with your
hand to support your weight. There is danger that the armrest mount may be damaged.
Adjustments (E), (J), and (K) use the air compressor built into the seat, so turn the engine starting switch to the ON
position when carrying out the adjustment.
(A) Fore-and-aft adjustment
Pull lever (1) up, set the seat to the desired position, then
release the lever.
Amount of adjustment: 180 mm (7.1 in)
(10 mm (0.4 in) x 18 stages)
(B) Adjusting seat angle
Move lever (2) up and apply your weight to the rear of the seat.
The seat will tilt to the rear.
Move lever (3) up and apply your weight to the front of the seat.
The seat will tilt to the front.
Amount of adjustment: 24 degrees (front and rear tilt: 3 stages
each)
(C) Adjusting height of seat
Move levers (2) and (3) up and move the seat up or down to
the desired position.
These levers are also used for adjusting the seat angle, so
adjust the seat angle to set the seat to the desired height.
Amount of adjustment: 65 mm (2.6 in)
(D) Adjusting fore-and-aft position of seat cushion
Push in lever (4), set the seat cushion to the desired position, then release the lever.
Amount of adjustment: 60 mm (2.4 in)
(E) Setting seat for weight
Sit on the seat, raise your body slightly, then operate switch (5) to adjust the strength of the suspension.
Amount of adjustment: 50 - 130 kg (110 - 287 lb)(target)
When + is pressed: Suspension becomes stronger
When - is pressed: Suspension becomes weaker
(F) Adjusting reclining angle
Move lever (6) up and move the backrest to the front or rear.
Push your back against the backrest when carrying out this adjustment. If your back is not pressing against the
backrest, the backrest may suddenly spring forward.
Amount of adjustment: Front tilt: Free