TM 9-2510-247-13&P
0028 00
UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - Continued
3. CANNOT RELIEVE HYDRAULIC PRESSURE FROM ONE OR MORE LEVERS
Step 1.
Is hydraulic breather valve in CLOSED position (WP 0021)?
If no, go to step 2.
If yes, move breather valve to OPEN position (WP 0021).
Step 2.
Is return line obstructed (WP 0056 00-5 steps 3 thru 5)?
If no, replace breather valve (WP 0065).
If yes, clean or replace return line.
4. CYLINDERS DO NOT EXTEND OR RETRACT WHEN PUSH SWITCH ON ELECTRIC CONTROL
BOX AND LEVERS ARE ACTIVATED
Step 1.
Are hydraulic motors running and hydraulic pressure being maintained?
If no, check to see if there is voltage at push button switch and solenoid.
If yes, adjust hydraulic flow control valves (WP 0003).
5. HYDRAULIC FLUID COMING FROM BREATHER VALVE
Step 1.
Is oil at correct level (WP 0056)?
If no, adjust oil level (WP 0056) and ensure breather valve on top of reservoir is
open at all times.
If yes, adjust hydraulic flow valves (WP 0003).
Step 2.
Is hydraulic pressure gauge showing pressure?
If no, adjust hydraulic flow valves (WP 0003).
If yes, go to step 2.
0028 00-2
