TM 5-3805-262-20
3-25. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. BUCKET DOES NOT RETURN TO DIGGING POSITION.
Step 1.
Check adjustment of return-to-dig actuating rod (page 11-17) .
a. If adjustment is not okay, adjust (page 11-17).
b. If adjustment is okay, go to step 2 below.
Step 2.
Start engine and operate at idle speed.
Place LIFT ARM control lever in RAISE position until bucket is at
maximum height,
then place in NEUT. position.
Place BUCKET control lever in DUMP position.
Press 5 ampere circuit breaker on right instrument panel.
Place BUCKET control lever in CROWD position and LIFT ARM control
lever in FLOAT position.
Check that bucket rolls back and lowers to ground.
a. If bucket is not flat on ground or is not at correct digging
angle, go to step 5 below.
b. If 5 ampere circuit breaker blew, try to determine if it blew
immediately or when bucket was lowering. If circuit breaker blew
immediately, problem is short circuit in hydraulic filter
switches or warning lamp circuitry. Perform resistance checks of
circuit to isolate defective part. If circuit breaker blew when
bucket was lowering to ground; go to step 3 below.
c. If bucket is flat on ground or is at correct digging angle,
problem was momentary short
open.
Shut off engine.
c i r c u i t c a u s i n g c i r c u i t b r e a k e r to
3-182
