BACKHOE-continued

TM 5-2420-224-34

Table 2-1. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

BACKHOE (CONT)

Record highest pressure and compare with acceptable ranges shown

below:

Swing Section Valve

A and B ports. . . . . . . . . . . . . 1700-1900 psi (115.6-129.2 bar)

Boom Section Valve

A port (upper) . . . . . . . . . . . . . 925-1075 psi (62.9-73.1 bar)

B port (lower) . . . . . . . . . . . . . 2400-2650 psi (163.2-180.2 bar)

Dipper Section Valve

A and B ports. . . . . . . . . . . . 2400-2650 psi (163.2-180.2 bar)

Bucket Section Valve

A and B ports. . . . . . . . . . . . . 2400-2650 psi (163.2-180.2 bar)

NOTE

Adjustment is the same for both ports. A port is shown.

If safety relief valve pressure is not correct, loosen lock nut (1).

Turn adjusting screw (2) to right to increase pressure, or left to

decrease pressure. Repeat until correct pressure is attained.

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