Komatsu F30791, Shop Manual

Page: 161 / 298

20-45
TESTING AND ADJUSTMENTS
CONTROL AND REGULATION OF THE LS DIFFERENTIAL
PRESSURE AND ADJUSTMENT OF THE LS VALVE (PC20R-8)
LS valve adjustment
If the D P
LS
value is not the one indicated, adjust the LS
valve (1) as follows:
1 - Disconnect the tube (2).
2 - Loosen the lock nut (3) and turn the adjusting screw
(4).
. To INCREASE pressure, turn in a CLOCKWISE
direction.
.
To DECREASE pressure, turn in a COUNTER-
CLOCKWISE direction.
H Each turn of the adjusting screw (4) varies the
pressure by about 13 bar (13 kg/cm
2
).
3 - Lock the nut (3).
Nut: 31 w 3.5 Nm
H After the adjustment, check the setting of the LS
valve (1) following the procedure used for the test.
PC20R-8 PC27R-8
RKPA2340
1
2
RKP04971
4
3
1