TM 5-2420-231-23-1
0073
Table 1. Multiple Backhoe Operations (Pilot Controls) Do Not Function Correctly - Continued.
073
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Operate backhoe control pattern
Multiple Backhoe
Pilot Control Pattern Switch
switch to pattern 1 (TM 5-2420-
Indicates On (Pattern 1) - Proceed to
Operations (Pilot Controls)
231-10). Monitor and record
step 6.
Do Not Function Correctly -
machine operation.
Continued
Pilot Control Pattern Switch Does
Not Illuminate - Repeat
troubleshooting from the beginning.
6. Wait 2 seconds before operation.
7. Operate backhoe swing, dipper,
Backhoe Operates Normally -
Proceed to step 8.
boom, and bucket (TM 5-2420-
231-10). Monitor and record
Backhoe Swing, Dipper, Boom, and
machine operation.
Bucket Operate Slowly or Will Not
Operate - Repeat troubleshooting from
the beginning.
Backhoe Dipper and Boom Will Not
Operate - Repeat troubleshooting from
the beginning.
Backhoe Dipper Operates With Left-
Hand Joystick and Boom Operates
With Right-Hand Joystick (Pattern 2)
- Repeat troubleshooting from the
beginning.
8. Operate left and right stabilizer
Left and Right Stabilizer Cylinders
Operate Normally - Proceed to step 9.
down (TM 5-2420-231-10). Moni-
tor and record machine operation.
Left and Right Stabilizer Cylinders
Will Not Operate - Repeat
troubleshooting from the beginning.
9. Operate backhoe control pattern
Pilot Control Pattern Switch Off
(Pattern 2) - Troubleshooting complete.
switch to pattern 2 (TM 5-2420-
231-10). Monitor and record
Pilot Control Pattern Switch
Indicates On - Repeat troubleshooting
machine operation.
from the beginning.
END OF WORK PACKAGE
0073-15/(16 blank)
