PowerBoss, Inc. Copyright 2011
Commander T Series PB# 4100032
Rev.C 03/12
Page 92
TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSE(S)
SOLUTION(S)
Hydraulic drive motor failure.
Insufficient oil supply
Fill Reservoir
Motor leaking.
Replace seals.
Drive pump coupler failed
Replace
Key on motor shaft failed
Replace key
Drive hub failed
Replace
Output shaft malfunction.
Replace output shaft and bearings.
Hydraulic gear pump failure.
Pump leaking.
Replace seals or RR Pump
Drive coupler failed
Replace
Gears worn or scored.
Rebuild pump or RR Pump
Relief valve stuck.
Clean or replace (at control valve).
Oil supply low.
Check and fill.
Oil strainer clogged.
Replace strainer (inside reservoir).
Incorrect oil.
Use recommended viscosity oil.
Damage due to entry of air into hydraulic
system.
Maintain correct hydraulic fluid level
in reservoir. Keep suction hose fittings
tight..
TROUBLESHOOTING