TDI
T
URBO
T
WIN
™
FROM
TECH DEVELOPMENT
Page 8
Publication: T3-790, Rev. 2
Issued January 9, 2013
4.0 TROUBLESHOOTING CHART
TROUBLE PROBABLE
CAUSE
SOLUTION
1. Motor does not run;
small air flow from
exhaust.
A. Y-Strainer or filter in supply line
clogged.
A. Clean strainer.
B. Nozzle blockage.
B. Remove blockage or obstruction from nozzles.
2. Motor does not run;
(rotate) but normal air
flow from exhaust.
A. Broken/damaged turbine
rotor(s).
A. Replace all damaged parts.
B. Broken gear train.
B. Repair or replace gear train.
C. Seized Load (e.g. oil pump)
C. Repair or replace pump (or driven device)
3. Reduced Motor
output power (will not
carry load).
A. Motor inlet air pressure/flow
insufficient to produce required
Motor output.
A. Check dynamic operating pressure at Motor inlet.
Increase air pressure in 10 PSIG increments; DO
NOT EXCEED OPERATING LIMIT.
B. Damaged turbine nozzle.
B. Replace turbine nozzle.
C. Inlet supply piping or
components too small.
C. Check dynamic operating pressure at Motor inlet.
Supply piping size (lengths/diameters) must match
dynamic flow requirements.
D. Pressure regulator orifice too
small.
D. Check dynamic operating pressure at Motor inlet.
Increase orifice size or replace pressure regulator to
one that matches pressure/flow requirements.
E. Inlet supply line valve (ball,
gate, relay, plug) too small.
E. Check dynamic operating pressure at Motor inlet.
Install valve that matches flow/pressure
requirements for application.
F. In line lubricator installed in
supply line restricting flow.
F. Check dynamic operating pressure at Motor inlet.
Remove lubricator.
G. Control Valve or Regulator not
fully open.
G. Check dynamic operating pressure at Motor inlet.
Repair or replace control valve or regulator as
needed.
H. Excessive back pressure;
exhaust restricted.
H. Check dynamic operating pressure at Motor
exhaust port. Clean exhaust piping or increase size
to length/diameter required for application.
J. Wrong rotation Motor.
J. Check rotation (direction) Replace with Motor of
proper rotation if necessary.
K. Wrong size Motor.
K. Check Application Specification for correct Motor.
4. Motor & Pump turns
too fast. Excessive oil
pump output/pressure.
OR
Validate with a hand
tachometer if necessary.
A. Motor Inlet air pressure too
high.
A. Check dynamic operating pressure at Motor inlet
Decrease air pressure in 10 PSIG (0.6 BAR)
increments.
OR
If there is a manual shut-off valve in the supply line,
partially close it to restrict dynamic Motor supply
pressure.
OR
Install a restriction orifice in the inlet supply line.
B. Wrong size Motor.
B. Check Application Specification for correct Motor.
