022-00029AE Operation and Maintenance Manual
Inspection, Maintenance and Adjustment 4-55
2.
Adjust relief valve cartridge on amplifier
(Figure 99). Cartridge must be adjusted to
open at 185 ±5 kg/cm
2
(2,630
±70 psi).
3.
Unscrew remove plug and washer. Adjust
screw that is beneath plug. Turn screw
clockwise to raise relief pressure. Turn
screw counterclockwise to lower relief
pressure. One turn varies 65kg/cm
2
.
4.
Install plug and washer after pressure has
been adjusted.
SERVICE BRAKE OUTLET PRESSURE
1.
Attach gauge to brake pressure test
(Figure 100) port of front axle.
2.
Outlet pressure should be 60 kg/cm
2
(853
psi).
PARKING BRAKE RELEASE PRESSURE
1.
Attach a pressure gauge to parking brake
port (Figure 101).
2.
Parking brake pressure should be 88 kg/
cm
2
.
Figure 99
Figure 100
Figure 101
