TM 5-2420-231-23-1
0072
Table 1. Backhoe Bucket Quick-Coupler Does Not Operate Correctly - Continued.
072
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Using a digital multimeter, mea-
Backhoe Bucket Quick-
Resistance 5.0 Ohms or Less -
sure resistance between chassis
Replace loader tool and backhoe
Coupler Does Not Operate -
options wiring harness connector
bucket coupler solenoid valve assembly
Continued
(WP 0007, Figure 215) terminal A
(WP 0260).
and machine ground. Resistance
Remove jumper wire from chassis
should be 5.0 ohms or less.
options wiring harness (WP 0007,
Figure 42) terminal G and machine
ground.
Connect all wiring harness connectors.
Install instrument panel right-side cover
(WP 0176).
Proceed to Test Step 7.
Resistance Greater Than 5.0 Ohms -
Replace side options wiring harness
(WP 0255).
Remove jumper wire from chassis
options wiring harness connector (WP
0007, Figure 42) terminal G and
machine ground.
Connect all wiring harness connectors.
Proceed to Test Step 7.
Test Step 7. Verify That Symptom Is
Resolved.
1. Ensure all wiring harnesses and
harness connectors are con-
nected.
2. Start and run engine (TM 5-2420-
231-10).
3. Set up machine to remove back-
hoe bucket (TM 5-2420-231-10).
4. Press and hold left backhoe
Backhoe Bucket Releases From
hydraulic quick-coupler switch,
Machine - Troubleshooting complete.
and right backhoe hydraulic quick-
Quick-Coupler Pins Do Not Release
coupler switch to release backhoe
From Loader - Repeat troubleshooting
bucket (TM 5-2420-231-10).
from the beginning.
5. Turn ignition switch to off position
(TM 5-2420-231-10).
END OF WORK PACKAGE
0072-10
