TM 5-2420-231-23-1
0078
Table 1. Left Stabilizer Does Not Operate Correctly - Continued.
078
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 6. Check Pilot Control
Left Stabilizer Does Not
Controller Indications.
Operate Correctly -
Continued
1. Start engine (TM 5-2420-231-10).
2. Place pilot control switch in the on
position (TM 5-2420-231-10).
3. Wait 2 seconds before operation.
4. Attempt to operate left stabilizer
(TM 5-2420-231-10).
5. Check indicator on pilot control
Indicator Flashes On for 3 Seconds
controller (WP 0007, Figure 160).
Then Off for Less Than 1 Second
Pilot control indicator should flash
Continuously (Normal) - Proceed to
on for 3 seconds then off for less
Test Step 7.
than 1 second continuously (WP
Indicator Flashes On Once With a 2-
Second Pause - Proceed to Test Step
8.
Indicator Flashes On and Off Twice
With a 2-Second Pause - Proceed to
Test Step 10.
Indicator Flashes On and Off Three
Times With a 2-Second Pause -
Proceed to Test Step 11.
Indicator Flashes On and Off Four
Times With a 2-Second Pause -
Proceed to Test Step 12.
Test Step 7. Test Pilot Control Flow.
Perform pilot control valve test (WP
Any Pilot Control Flow Greater Than
1 gpm - Remove hose and pressure
gauge.
Replace backhoe control valve
assembly (WP 0263).
Proceed to Test Step 16.
Any Pilot Control Flow Less Than 1
gpm - Remove hose and pressure
gauge.
Replace pilot control valve assembly
(WP 0264).
Proceed to Test Step 16.
Test Step 8. Test for Shorted Pilot
Control Wiring Harness to Ground.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Disconnect pilot control wiring har-
ness (WP 0007, Figure 160) from
pilot control controller (WP 0187).
3. Remove stabilizer control switches
(WP 0190).
0078-6
