LYCOMING OPERATOR’S MANUAL SECTION 6
O-360 AND ASSOCIATED MODELS TROUBLE-SHOOTING
TROUBLE PROBABLE CAUSE REMEDY
Engine Will Not Deliver Excessive dirt build-up in Thoroughly clean compressor
Rated Power (Cont.) compressor assembly. Service air cleaner and
checkfor leakage.
Rotating assembly bearing seizure Overhaul turbocharger.
Restrictions in return lines from Remove and clean lines.
actuator to waste gate controller
Exhaust bypass controller is in Have exhaust bypass controller
need of adjustment adjusted.
Oil pressure too low Tighten fittings. Replace lines or
hoses. Increase oil pressure to
desired pressure.
Inlet orifice to actuator clogged Remove inlet line at actuator and
clean orifice.
Exhaust bypass controller Replace unit.
malfunction
Exhaust bypass butterfly not Low pressure. Clogged orifice in
closing inlet to actuator.
Butterfly shaft binding. Check
bearings.
Turbocharger impeller binding, Checkbearings. Replace
frozen or fouling housing turbocharger.
Piston seal in actuator leaking. Remove and replace actuator or
(Usually accompanied by oil disassemble and replace packing.
leakage at drain line.)
Critical Altitude Lower Than Controller not getting enough oil Checkpump outlet pressure, oil
Specified pressure to close the waste gate filters, external lines for leaks or
obstructions.
Chips under metering valve in Replace controller.
controller holding it open
Metering jet in actuator plugged Remove actuator and clean jet.
Actuator piston seal failed and If there is oil leakage at actuator
leaking excessively drain, clean cylinder and replace
piston seal.
6-5
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