TM 5-3805-281-24-1
Diagnostic Information
DIAGNOSE PROPEL SYSTEM MALFUNCTIONS
NOTE: Diagnose malfunction charts are arranged from
most probable and simplest to verify, to least
likely and most difficult to verify.
Symptom
Problem
Solution
Propel Park Brakes Do Not Apply
Propel speed change valve stuck, oil
Remove valve and clean or replace.
not released from piston cavity
See Group 0260.
Propel park brake
Remove and repair brake. See
Group 0260.
Track Will Not Move In One
Pilot circuit malfunction
See Diagnose Pilot Circuit
Direction
Malfunctions. See Group 9025-15.
Propel crossover relief valve
Do Crossover Relief Valve Test And
Adjustment. See Group 9020-25.
Propel control valve spool stuck
Manually move spool to check for
sticking. See Group 3360.
Counterbalance valve spool stuck
Inspect counterbalance valve. See
Group 0260.
Shuttle valve in brake valve
Inspect shuttle valve. See Group
9025
assembly not seating
0260.
15
20
Rotary manifold leakage
Inspect rotary manifold. See Group
0260.
Track Will Not Move In Either
Pilot Circuit Malfunction
See Diagnose Pilot Circuit
Directions
Malfunctions. See Group 9025-15.
Crossover relief valve
Do Crossover Relief Valve Test and
Adjustment. See Group 9025-25.
Propel pilot controller
Inspect propel pilot controller. See
Group 3360.
Propel valve spool
Manually move spool to check for
sticking. See Group 3360.
Counterbalance valve spools stuck
Inspect counterbalance valve. See
Group 0260.
Continued on next page
TX,9025,GG2530
1919NOV971/3
