ENGINE MANUAL
IAE50R – AA
E1.01.05 – E
Issue date: 25.Jan.2018
Page: 13-6
Revision no: 9
13.5
Air Cooling System
13.5.1
Fan Belt
Check fan belt condition. Examine belt for fraying, cracks or broken strands. If in doubt
replace it. Check belt tension as in 11.2.3. Adjust as necessary.
Need for significant or regular adjustment indicates need for
belt replacement! When changing a fan belt, see 11.2 for
torque settings!
13.5.2
Fan Belt Replacement
1)
Drain off the coolant & remove connections to the water pump.
2)
Disconnect alternator leads and oil pipes.
3)
Remove the fan assembly and check bearings for play / roughness.
4)
Remove the Water Pump Housing along with the Alternator Stator Assembly and
check the water pump bearings for play.
Care should be taken in withdrawing the assemblies due to
the loose internal tufnol drive coupling!
5)
Fit the new Fan Belt (using Austro Engine GmbH “Fan Belt Kit”).
6)
Reassemble using the reverse procedure for items (2) to (5) inclusive, above, and
tension the belt as in 11.2.3.
Replace tufnol drive coupling from the fan belt kit and
assemble with the reduced diameter towards the water
pump!
Fit the new O–Rings in the water pump housing with those
from the fan belt kit using compatible grease to hold in
place!
Use Loctite 242 on all fixings!
IF IN DOUBT PLEASE CONTACT Austro Engine GmbH!
7)
Connect services, as appropriate and fill with coolant.
8)
Ensure that the coolant lines and oil lines are bled.
9)
If necessary, pressure test the coolant system as per aircraft manual or chapter
above, and check for leaks.
