Komatsu D475A-5E0 Operation & Maintenance Manual page 153

OPERATION
ADJUSTMENT
ADJUSTING OPERATOR'S SEAT
When adjusting the position of the operator's seat, always set the work equipment lock lever and parking brake lever to LOCK
positions to prevent any accidental contact with the control levers.
Park the machine in a safe place and stop the engine when performing adjustment of the operator's seat.
Adjust the seat position at the beginning of each shift or when operators change.
Adjust the seat so that the brake pedal can be depressed all the way down with the operator's back against the backrest.
MACHINES EQUIPPED WITH AIR SUSPENSION SEAT
(High backrest)
Adjustments (C), (D) use the air compressor built into the seat, so turn the engine starting switch to ON position.
NOTICE
There is danger of damage to the air compressor, so do not keep lever (3) operated continuously for more than 1 minute.
(A) Fore-and-aft adjustment
Pull lever (1) up, set the seat to the desired position, then release
the lever.
Fore-and-aft adjustment: 190 mm (7.5 in)(10 mm (0.4 in) x 19
stages)
(B) Adjusting seat angle
Move lever (2) up, move the seat cushion at the front up or down
to set to the desired position, then release the lever.
Amount of adjustment
Forward tilt: 3 deg.
Rear tilt: 5 deg.
(C) Adjusting seat height
The seat height adjustment uses an air system, and it can be adjusted steplessly.
When adjusting the height, pull lever (3) up fully or push it down fully (when pulling it up, pull it until a click is felt).
When the seat is set at the desired height, release the lever. If the lever is kept pulled up, the position where the
seat does not rise any further is the maximum height. When the seat reaches the maximum height, the suspension
automatically goes down slightly to secure the amount of movement of the lever.
If the operator raises his body from the seat or changes the amount of weight applied to the seat during adjustment,
the air in the suspension may be discharged.
Amount of adjustment: 80 mm (3.2 in)
3 - 100
WARNING
OPERATION