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 (Cont).
Step 6. Connect multimeter between control valve assembly connector pins A
and B.
Multimeter should indicate 55 ohms.
a. If multimeter indication is not 55 ohms , notify next higher
maintenance level to replace control valve assembly (solenoid is
open and must be replaced).
b. If multimeter indication is 55 ohms, go to step 7 below.
Step 7.
Check blue-white wire between
wiring harness connector and
return-to-dig switch white wire
for an open circuit condition.
a . I f w i r e i s o p e n , r e p l a c e i t.
b. If wire is okay, check black
wire between return-to-dig
switch and chassis frame for
open circuit condition.
Replace if open (page 5-70).
If wire is okay, replace
return-to-dig switch (page
5-68) .
5. BUCKET HEIGHT CONTROL NOT OPERATING PROPERLY.
Step 1.
Check adjustment of bucket height control (refer to operator’s
manual
a . I f
TM
b . If
T M 5 - 3 8 0 5 - 2 6 2 - 1 0 ) .
adjustment is not correct, adjust (refer to operator’s manual
5-3805-262-10).
adjustment is correct, go to step 2 below.
3-184
