Komatsu PC20R-8 Shop Manual page 177

TESTING AND ADJUSTMENTS
CHECKING FOR ANY LEAKAGES INSIDE THE SWING MOTOR
H Test conditions:
Engine: at working temperature.
.
Hydraulic oil: 45 ± 55ëC.
.
Turret: locked in place with the swing-locking pin.
.
1 - Disconnect the drainage tube (1) of the motor (2) and
plug it.
2 - Attach a provisional tube to catch the drainage oil.
3 - Start the motor and bring it up to maximum swing.
4 - Make sure that the turret is locked in place and push
the swing command lever to the end of its stroke.
5 - Hold it in this position for 15 seconds and then mea-
sure the leakage for the next full minute.
6 - Bring the motor back to low speed and repeat the
reading for the other direction of swing.
7 - Check that the average between the two readings
falls within normal values (See «TECHNICAL DATA»).
8 - Re-assemble the hydraulic drainage circuit.
PC20R-8 PC27R-8
CHECKING FOR ANY LEAKAGES INSIDE
THE SWING MOTOR
PC20R-8
2
1
PC27R-8
RKPA2540
2
1
RKPA2302
20-61