Adjustment Of The Stroke Of The - Komatsu PC20R-8 Shop Manual

TESTING AND ADJUSTMENTS
ADJUSTMENT OF THE STROKE OF THE BLADE COMMAND LEVER
H Test conditions:
Engine: switched off.
.
Working equipment: resting on the ground.
.
The adjustment, carried out on the power train, is aimed at
restoring the position of the command lever, keeping the
neutral position of the valve block spool.
The procedure is as follows:
1 - Remove the internal cover of the control valve com-
partment (1). (For details, see «30. REMOVAL AND
INSTALLATION»).
2 - Loosen the nuts (2) and unscrew the screws (3) by a
few turns.
3 - Adjust the centering of the lever (4) with respect to the
housing (5) by loosening the outside nut (6) of one of
the sheathings and tightening the inside nut (7) of the
other by the same amount.
4 - Secure the position with the nuts (8) and (9).
5 - Execute a full stroke in one of the two directions with
the lever (4).
H Make sure that the valve block spool executes the
full stroke.
6 - Tighten the lock-screw (3) until it rests on the lever
and then turn it for another half turn. Secure the posi-
tion with the nut (2).
7 - Repeat this lever adjustment (4) for the other direc-
tion.
Before starting the engine to check the adjust-
ment, make sure that the valve block spool re-
turns to its neutral position each time the lever
(4) is released.
8 - Re-assemble the inner cover of the control valve com-
partment (1).
20-32

ADJUSTMENT OF THE STROKE OF THE

BLADE COMMAND LEVER
1
RKPA2180
2
2
3
RKPB5504
5
4
7
8
9
6
RKPB5505
PC20R-8 PC27R-8