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
5. Disconnect front console options
Loader and Backhoe Quick-
wiring harness connector (WP
Couplers Do Not Operate -
0007, Figure 205) from front con-
Continued
sole wiring harness connector (WP
0007, Figure 206) (WP 0163).
6. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less - Install
sure resistance between front con-
ride control fuse (TM 5-2420-231-10).
sole wiring harness connector (WP
Proceed to Test Step 2.
0007, Figure 206) terminal A and
Resistance Greater Than 5.0 Ohms -
front console wiring harness con-
Replace front console wiring harness
nector (WP 0007, Figure 70) termi-
(WP 0162).
nal 1C. Resistance should be 5.0
Install ride control fuse (TM 5-2420-
ohms or less.
231-10).
Proceed to Test Step 8.
Test Step 2. Quick-Coupler Locking
Pins Mechanically Stuck or
Corroded.
1. Lower front end loader bucket flat
on ground (TM 5-2420-231-10).
2. Start and run the engine (TM 5-
2420-231-10).
3. Activate front end loader (FEL) tool
FEL Locking Pins Release OK -
carrier switch to release FEL lock-
Proceed to step 4.
ing pins and remove FEL bucket
FEL Locking Pins Do Not Release -
from machine (TM 5-2420-231-
Repeat procedure several times until
10).
quick-coupler pins release from loader.
4. Lower stabilizers to ground (TM 5-
2420-231-10).
5. Lower backhoe bucket to ground
(TM 5-2420-231-10).
6. Press and hold the left backhoe
hydraulic quick-coupler switch,
and the right backhoe hydraulic
quick-coupler switch to release
backhoe bucket (TM 5-2420-231-
10).
7. Operate machine to release back-
Backhoe Bucket Releases From
hoe bucket (TM 5-2420-231-10).
Machine - Troubleshooting complete.
Quick-Coupler Pins Do Not Release
From Loader - Repeat procedure
several times until backhoe bucket
releases from machine.
Test Step 3. Test for Shorted Wiring
Harness.
1. Remove instrument panel front
cover (WP 0174).
0069-3
