CRANE

5-2420-224-34

Table 2-1. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

BACKHOE (CONT)

When safety relief valve pressure is correct, perform leak test on all

safety relief valves (page 20-69).

32. BACKHOE STOPS ABRUPTLY WHEN SWUNG FULL LEFT OR RIGHT.

Step 1. Check for damage to relief valve in end of swing cylinder.

Replace relief valve (page 11-10).

Step 2. Disassemble swing cylinder and check for damage to pin inside swing cylinder.

Replace damaged part(s) (page 20-105).

33. BACKHOE SWINGS CORRECTLY BUT WILL NOT STOP WHEN SWING CONTROL

RETURNED TO NEUTRAL.

Check for damaged springs or valve disc in swing section valve.

Repair swing section valve (page 20-51).

34. BACKHOE BOOM DRIFTS WHEN LOADED AND CONTROLS IN NEUTRAL.

Check for dirty or defective cylinder load check valves in boom section valve.

Clean, or repair boom section valve (page 20-59).

35. STABILIZER(S) WILL NOT HOLD BACKHOE IN PLACE.

Check for clogged or defective check valves in stabilizer control valves as follows:

a. With engine stopped, backhoe in operating position, and stabilizers in

down position, pull left stabilizer control lever inward. If cylinder starts to

retract, immediately release lever.

b. Repeat step a using right stabilizer control lever. Vehicle movement

indicates defective check valve(s) in stabilizer control valve on side of

vehicle that moved.

Replace stabilizer control valve (page 11-12).

36. LOAD FALLS WHEN CONTROL VALVE ACTUATED.

Check for damaged load check valves in backhoe control valve.

Repair backhoe control valve (page 20-41),

CRANE

37. CRANE CONTROLS WILL NOT RESPOND.

Step 1. Check PTO control linkage adjustment.

Adjust PTO control linkage (page 3-81).