SERVICE DATA
PERFORMANCE CRITERIA
4
2
PERFORMANCE CRITERIA 2D0AX002
Methods for inspecting performance
Hydraulic oil pressure (Boom, arm, dozer blade)
Measurement method
• Engine: Maximum R.P.M.
• Hydraulic oil temp.: 50°C to 60°C (122°F to 140°F)
• Install a pressure gauge on the pressure detection
port. Operate the hydraulic circuit to be tested, and
measure the relief pressure.
Adjustment method
1. Loosen the locknut (2), and turn the setscrew (1) to
adjust the set pressure.
• Turn the setscrew clockwise to increase the set
pressure.
• Turn the setscrew counterclockwise to decrease
the set pressure.
2. In order to keep the setscrew (1) from turning after
the pressure has been adjusted, tighten the locknut
(2) while holding the setscrew (1) firmly in place.
Lock nut: 30 ± 2 N·m (22.1±1.5 ft.-lb)
3. Operate the relief valve once more to confirm that the
pressure that has been set is stabilized.
Circuit Relief valve
Pressure detection port
Port Size
Boom R1 A1
G1/4Arm R2 A2
Dozer blade R3 A3
A3
R3
2DAG05Z
1
2
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