TM 5-2420-231-23-1
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Table 1. Front End Loader Quick-Coupler Does Not Operate Correctly.
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MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Front End Loader (FEL)
Quick-Coupler Does Not
Always inspect the wiring harness connectors that are involved in the
Operate Correctly
circuit. Poor connections can often be the cause of a problem in an
electrical circuit. Verify that all connections in the circuit are clean and
secure, and that all connections are in good condition. If a problem with a
connection is found, correct the problem and verify that this malfunction is
active before performing this procedure.
Perform an open or short circuit test at each wiring harness connection to
identify the correct wiring harness to replace.
Perform this test only if the condition is active.
Test Step 1. Check Quick-Coupler
Operation.
1. Lower FEL bucket flat on ground
(TM 5-2420-231-10).
2. Start and run the engine (TM 5-
2420-231-10).
3. Press and hold FEL quick-coupler
Loader Bucket Releases OK -
switch (Figure 1, Item 1) in the
Troubleshooting complete.
retract position to remove loader
Loader Bucket Does Not Release -
bucket from machine (TM 5-2420-
Repeat procedure several times until
231-10).
quick-coupler pins release from loader.
If loader bucket still does not release,
proceed to Test Step 2.
Figure 1. FEL Quick-Coupler Switch.
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