OPERATOR'S MANUAL MAINTENANCE

Section E - Hydraulics
Service Procedures
Travel Motor Relief Pressure
E-232 E-232
9803/9880-3
Travel Motor Relief Pressure
TE-016
1 Prepare the Machine
a Operate the dipper out and lower the boom to set
the bucket on the ground.
C030150-1
Fig 25.
b Make the machine safe, refer to Section E,
Service Procedures.
c Connect a 0 - 400 bar (0 - 6000 lb/in
2
) pressure
gauge to test point TP1 or TP2.
2 Increase MRV Pressure, refer to Section E, Service
Procedures.
3 Insert a lock pin P between the drive sprocket to be
measured and the side frame.
TOOL-C1
Fig 26.
C002730-C1
Fig 27.
4 Start the engine, select MID speed travel, lower the
gate lock lever and run the engine at minimum no-
load speed in the E mode.
5 Slowly engage the locked travel motor and measure
the pressure in forward and reverse.
6 The pressure gauge reading (travel motor) should be
compared to the technical data at the start of the
section. If it is outside the limits, adjust relief valve
pressure.
Note: For accurate setting, the pressure should be
adjusted up to the required level. Release lock nut A.
Adjust setting screw B to indicate a pressure below the
required level and then bring the pressure back up for final
setting. Tighten lock nut A.
716370-C8
Fig 28.
7 Restore Original MRV Pressure, refer to Section E,
Service Procedures.
∅35
∅80
300 150
P
B
B
A
A