TM 5-2420-231-23-1
0080
Table 1. Stabilizers and Backhoe Auxiliary Hydraulic Controls Do Not Operate - Continued.
080
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Check indicator (Figure 2, Item 2)
Stabilizers and Backhoe
Indicator Flashes On for 3 Seconds
on pilot control controller (Figure 2,
Auxiliary Hydraulic Controls
Then Off for Less Than 1 Second
Item 1). Pilot control indicator
Continuously (Normal) - Proceed to
Do Not Operate - Continued
should flash on for 3 seconds then
Test Step 2.
off for less than 1 second continu-
Indicator Flashes On and Off Three
ously (WP 0006).
Times With a 2-Second Pause -
Proceed to Test Step 3.
Figure 2. Pilot Controls Controller.
0080
Test Step 2. Test Pilot Pressure.
While activating stabilizer switches or
Pilot Pressure 350 to 550 psi -
Remove hose and pressure gauge from
backhoe auxiliary hydraulic switches
machine.
(TM 5-2420-231-10), test pilot pressure
Replace backhoe control valve
assembly (WP 0263).
Proceed to Test Step 5.
Pilot Pressure Less Than 350 psi -
Remove hose and pressure gauge from
machine.
Replace pilot control valve assembly
(WP 0264).
Proceed to Test Step 5.
Test Step 3. Test Stabilizer Control
and Backhoe Auxiliary Hydraulic
Switches.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10).
