TM 5-2420-231-23-1
0067
Table 1. Loader Bucket Does Not Operate Correctly - Continued.
067
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Adjust loader relief valve to specifi- Loader Relief Valve Adjusts to
Loader Bucket Does Not
cation of 3,000 to 3,200 psi (WP
Operate Correctly -
Specification of 3,000 to 3,200 psi -
Disconnect hose and pressure gauge.
Continued
Proceed to Test Step 8.
Loader Relief Valve Will Not Adjust
to Specification or Loader Relief
Valve Opening Pressure Is Less
Than 2,600 psi (17,926 kPa) -
Disconnect hose and pressure gauge.
Replace loader control valve assembly
(WP 0261).
Proceed to Test Step 8.
Test Step 7. Test Loader Control
Valve Leakage.
Perform loader test (WP 0086).
While Attempting to Operate Loader
Bucket, Flow Low and Remains Low
(Less Than 1 gpm) - Perform
Flowmeter Disconnect Procedure (WP
Replace loader control valve assembly
(WP 0261).
Proceed to Test Step 8.
While Attempting to Operate Loader
Bucket, Initial Flow High Then Goes
Low (Less Than 1 gpm) - Perform
Flowmeter Disconnect Procedure (WP
Replace both loader bucket cylinders
(WP 0270).
Proceed to Test Step 8.
Test Step 8. Verify That Symptom Is
Resolved.
Operate loader bucket (TM 5-2420-
Loader Bucket Cylinders Operate
231-10) and observe operation.
Normally - Troubleshooting complete.
Loader Bucket Cylinders Operate
Slowly - Repeat troubleshooting from
the beginning.
Loader Bucket Will Not Operate -
Repeat troubleshooting from the
beginning.
END OF WORK PACKAGE
0067-7/(8 blank)
