OP000509Inspection, Maintenance and Adjustment
4-78
HYDRAULIC PRESSURE
CHECKS
Hydraulic pressure for most systems can be check by using
the remote test ports shown in (Figure 114).
Control Valve Pressure
1. Attach gauge to port (1, Figure 114).
2. Relief valve cartridge on control valve (Figure 115)
must be adjusted to open at 200 ±5 kg/cm
2
(2,844 ±70psi)
Brake Charge Pressure
1. Attach gauge to port (2, Figure 114).
2. Adjust relief valve cartridge on brake, pilot and fan
motor supply valve (Figure 116). Relief pressure
(Figure 116) for brake charging is 80 ±5 kg/cm
2
(1,138 ±70 psi).
FG001653
1 32
4 5
Figure 114
Reference
Number
Description Pressure
1
Main Pump Pressure
(TPM)
200 ±5 kg/cm
2
2
Brake Charge Pressure
(TP2)
80 kg/cm
2
3
Steer Pump Pressure
(TPS) at Only Steering
Relief
200 ±5 kg/cm
2
4
Transmission Clutch
Pressure (TM)
16 - 18 kg/cm
2
5
Control Lever Activation
Pressure (TP1) at E/G
High Idle
28 +2/-0 kg/
cm
2
FG008107
Figure 115
FG008108
Figure 116
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