Bristell B23-915
Airplane Maintenance Manual
supplement
Chapter 79
Issue: 09.12.2021
Chapter 79 Page 3
79-20
Distribution
79-20-01 Oil Cooler
Removal
Tools needed:
wrench size 22, 30
See Fig. 1.
▶
Remove the upper and lower engine cowling (see Chapter
71-10).
▶
Drain oil from the oil system (see Chapter 12-10-20 of
the main manual).
NOTE
It is also possible to pump oil from the cooler to the oil tank. You can
do it by manual running the engine by means of the propeller, whereas
from the oil tank you will remove the hose leading to the oil cooler.
Engine ignition must be switched off!
▶
Remove hose fittings from the oil cooler necks. After that
it is possible to remove nuts from the cooler necks
attaching the cooler to the brackets on the engine.
Installation
Tools needed:
wrench size 22, 30
See Fig. 1.
▶
Set the oil cooler (3) to the bracket on the engine and
gradually install and tight the nuts. Install the fittings
with oil hoses, screw the fitting nuts.
▶
Fill the oil system with oil (see Chapter 12-10-20 of the
main manual) and check oil system tightness.
▶
Install the lower and upper engine cowling (see Chapter
71-10).
