Commander T Series PB# 4100032
Rev.C 03/12
PowerBoss, Inc. Copyright 2011
Page 93
TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSE(S)
SOLUTION(S)
Hydraulic variable displacement
pump failure.
Pump leaking.
Replace seals.
Relief valve(s) stuck.
Clean or replace relief valve(s) at the
pump.
Drive coupling malfunction.
Replace defective gears.
Control linkage out of adjustment.
Check to see if linkage is binding
unfastened.
Charge pump gears worn or scored.
Replace defective gears.
Damage due to entry of air into hydraulic
system.
Maintain correct hydraulic fluid level
in reservoir. Keep suction hose fittings
tight.
Hydraulic system noisy.
Air in system.
Check fluid level in reservoir; check for
loose connections or leaks.
Relief valve dirty or damaged.
Clean or replace.
Loose suction line.
Tighten fittings.
Clogged section filter or pump inlet line.
Replace filter, clear line; change fluid in
reservoir if dirty and flush system.
Internal pump or motor damage.
Inspect and repair.
TROUBLESHOOTING
