TM 5-2420-231-23-1
0069
Table 1. Loader and Backhoe Quick-Couplers Do Not Operate - Continued.
069
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Using a digital multimeter, test for
Continuity - Proceed to step 3.
Loader and Backhoe Quick-
continuity between front console
No Continuity - Replace loader tool
Couplers Do Not Operate -
options wiring harness connector
and backhoe bucket coupler solenoid
Continued
(WP 0007, Figure 211) terminal 1
valve assembly (WP 0260).
and machine ground. There should
Connect all wiring harness connectors.
be no continuity.
Proceed to Test Step 8.
3. Remove air cleaner barrier curtain
(WP 0099).
4. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 135) from chassis options wir-
ing harness connector (WP 0007,
Figure 136) (WP 0163).
5. Using a digital multimeter, test for
Continuity - Replace front console
continuity between front console
options wiring harness (WP 0162).
options wiring harness connector
Connect all wiring harness connectors.
(WP 0007, Figure 211) terminal 1
Install new ride control fuse (TM 5-
and machine ground. There should
2420-231-10).
be no continuity.
Proceed to Test Step 8.
No Continuity - Proceed to step 6.
6. Using a digital multimeter, test for
Continuity - Replace chassis options
continuity between chassis options
wiring harness (WP 0171).
wiring harness connector (WP
Connect all wiring harness connectors.
0007, Figure 136) terminal G and
Install new ride control fuse (TM 5-
machine ground. There should be
2420-231-10).
no continuity.
Proceed to Test Step 8.
No Continuity - Replace loader tool
and backhoe bucket coupler solenoid
valve assembly (WP 0260).
Connect all wiring harness connectors.
Proceed to Test Step 8.
Test Step 6. Test Loader Quick-
Coupler Control Circuit for a Short.
1. Disconnect chassis options wiring
harness connector (WP 0007, Fig-
ure 217) from loader quick-cou-
pler solenoid (WP 0007, Figure
218) (WP 0260).
2. Remove air cleaner barrier curtain
(WP 0099).
3. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 135) from chassis options wir-
ing harness connector (WP 0007,
Figure 136) (WP 0163).
0069-10