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Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
Rev. No:
Rev. Date:
Chapter:
Issue:
Issue Date:
Page:
Content:
20-AMM-79-02
3
06.11.2013
1
6
1
25.08.2014
79
OIL
79.00
GENERAL
ENGINE OIL SYSTEM
The engine oil system is a wet oil sump system. The oil system is
used for lubrication, cooling and the micro sealing of the engine
in the area of the piston and cylinder. The pressure cycle
lubricates all heavily used bearings of the engine and supplies
the turbocharger with oil. Cams, chain drive and valve guides are
lubricated with pressure less leak oil.
•
TAE 125-02-99 installation:
The oil is sucked by the chain driven pump from the sump
and led to the filter, thereafter to the thermostat. At oil
temperatures lower than 78°C oil is streaming directly to the
main path through the short cycle. When the oil temperature
rises above 78°C, the thermostat opens the path to the oil
cooler. At temperatures above 94°C the oil is taking the path
through the oil cooler exclusively, which ensures a
maximum oil temperature of 140°C under all operating
conditions.
•
TAE 125-02-114 installation:
The oil is sucked by the chain driven pump from the sump
and led through the oil water heat exchanger, thereafter to
the oil filter.
Then the engine parts are lubricated and cooled by the oil, the
turbocharger is supplied by an extra hose from the cylinder head.
The oil within the engine is passing the bearings and then drops
back into the sump. The measured values of oil temperature and
pressure are displayed at the CED 125 and led to the FADEC.
The system contains 4.5 to 6 liters (1.19 to 1.59 US gal) oil, the
level can be checked with a dip stick.
For type of engine oil refer to Chapter 6 of this supplement.
Summary of Contents for Cessna 172
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