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
4. Using a digital multimeter, test for
Continuity - Replace front console
Loader and Backhoe Quick-
continuity between front console
options wiring harness (WP 0163).
Couplers Do Not Operate -
options wiring harness connector
Connect all wiring harness connectors.
Continued
(WP 0007, Figure 211) terminal 3
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 5.
5. 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 H 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.
Install new ride control fuse (TM 5-
2420-231-10).
Proceed to Test Step 8.
Test Step 7. Test Backhoe Quick-
Coupler Solenoid Control Circuit for
a Short to Ground.
1. Remove instrument panel from
side console (WP 0172).
2. Disconnect chassis options wiring
harness connector (WP 0007, Fig-
ure 42) from side options wiring
harness connector (WP 0007, Fig-
ure 43) (WP 0255).
3. Using a digital multimeter, test for
Continuity - Replace side options
continuity between side options
wiring harness (WP 0255).
wiring harness connector (WP
Connect all wiring harness connectors.
0007, Figure 207) terminal 1 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 - Proceed to step 4.
4. Disconnect chassis options wiring
harness connector (WP 0007, Fig-
ure 213) from backhoe quick-cou-
pler flow control solenoid (WP
0007, Figure 214) (WP 0260).
0069-11