Kubota K008-3 Workshop Manual page 278

(3)Main relief valve pressure
P1 measurement port
P2 measurement port
[Measuring procedure]
1. Remove the plug (1/8) of the main pump discharge
side, and set the pressure gauge.
P1 Arm, swivel, travel (L), dozer, leg retraction and
service
P2 Boom, bucket, swing and travel (R)
2. Start the engine. Check the circuit to be measured
for any oil leak.
3. Operate the lever while the engine is rotated at the
maximum speed, and relieve the cylinder.
4. Conduct measurement thrice, obtain mean value
and take it as measured value.
*Conduct measurement at oil temperature of 50 ±
5°C.
Arrangement of control valve section
[Measuring procedure]
1. Loosen the lock nut of the relief valve.
2. Set the pressure by turning the adjusting screw with
use of hexagon wrench. When the pressure is set,
tighten the lock nut.
*Clockwise turning increases the pressure, and
counterclockwise turning decreases it.
3. Operate the lever while the engine is rotated at the
maximum speed, and check the set pressure.
IV-S-22
Courtesy of Machine.Market