TM 5-2420-231-23-1
0071
Table 1. Front End Loader Quick-Coupler Does Not Operate Correctly - Continued.
071
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 5. Test Quick-Coupler
Front End Loader (FEL)
Load Sense Solenoid Control
Quick-Coupler Does Not
Circuit.
Operate Correctly -
Continued
1. Install a jumper wire between front
console wiring harness connector
(WP 0007, Figure 211) terminal 1
and machine ground.
2. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between front con-
Remove jumper wire from front console
sole options wiring harness
wiring harness connector (WP 0007,
connector (WP 0007, Figure 135)
Figure 211) terminal 1 and machine
terminal G and machine ground.
ground.
Resistance should be 5.0 ohms or
Proceed to step 5.
less.
Resistance Greater Than 5.0 Ohms -
Replace front console options wiring
harness (WP 0163).
Proceed to Test Step 6.
3. Disconnect chassis options wiring
harness connector (WP 0007, Fig-
ure 213) from quick-coupler load
sense solenoid (WP 0007, Figure
214) (WP 0260).
4. Install a jumper wire between
chassis options wiring harness
connector (WP 0007, Figure 213)
terminal A and machine ground.
5. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between chassis
Replace loader tool and backhoe
options wiring harness connector
bucket coupler solenoid valve assembly
(WP 0007, Figure 136) terminal G
(WP 0260).
and machine ground. Resistance
Remove jumper wire from chassis
should be 5.0 ohms or less.
options wiring harness connector (WP
0007, Figure 213) terminal A and
machine ground.
Connect all wiring harness connectors.
Install instrument panel front covers
(WP 0174).
Proceed to Test Step 6.
Resistance Greater Than 5.0 Ohms -
Replace chassis options wiring harness
(WP 0171).
Connect all wiring harness connectors.
Install instrument panel front covers
(WP 0174).
Proceed to Test Step 6.
Test Step 6. Verify That Symptom Is
Resolved.
1. Ensure all wiring harness connec-
tors are connected.
0071-5