TEO-540-C1A Engine Maintenance Manual
12-30
© 2018 Avco Corporation. All Rights Reserved
Page 90
November 2018
TEO-540-C1A Engine Maintenance Manual
Table 1 (Cont.)
Fault Isolation Guide
Problem
Cause
Corrective Action
Ref.
Engine will not supply
the rated power
(Cont.)
Oil pressure too low
1.
Tighten fittings.
2.
Replace oil hoses.
3.
Increase oil pressure as
necessary.
72-50
Inlet orifice to actuator is
clogged.
Remove the inlet line at the
actuator and clean the orifice.
Malfunction of exhaust
bypass control valve
Replace the exhaust bypass
control valve.
Exhaust bypass valve
butterfly is not closing
1.
Examine orifice inlet to
actuator for blockage.
2.
Clean as necessary.
3.
Examine the butterfly shaft
for binding.
Turbocharger impeller
binding, frozen or fouling
housing
1.
Examine the shaft play and
contact with housings for
binding.
2.
If contact is present, replace
the turbocharger.
72-40
Piston seal in actuator is
leaking
NOTICE:
Usually
accompanied by oil
leakage at drain line.
Remove and replace the
actuator or disassemble and
replace the packing.
Fuel injector clogged
Replace the clogged fuel injector.
73-10
Engine smokes
excessively
NOTICE:
An engine
regularly smokes if it
is idling for an
extended period.
Air in oil hoses or actuator Bleed the system.
Breather is clogged
Make sure that nothing is
blocking the air flow.
Exhaust bypass valve is
not opening correctly
Examine the exhaust bypass
valve to make sure that the shut
off valve in the return line is
operating correctly.
Engine hesitates,
misses
Valve sticking
Refer to "Corrective Action for
Valve Sticking."
72-30 &
05-50