9
N73B60 Engine - Diagnosis
Ancillary Components and Drive Belts - Removal
Remove the following compo-
nents:
1. Water pump pulley
2. 6 rib main drive belt
3. Main drive belt tensioner
4. Alternator
5. Deflection pulley
6. Power steering and dynamic drive pump
7. A/C compressor drive belt tensioner
8. Crankshaft pulley
9. A/C compressor
10. 4 rib A/C compressor drive belt
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The tensioning pulley is pushed back using a
Torx tool in the recess provided (1) and fixed in
this position by inserting a locking pin as shown
(2).
The cooling module of the N73 includes an
external engine oil cooler. The engine oil cooler
is located in front of the engine coolant radiator
above the A/C condenser.
The engine oil flows from the oil pump through a
channel in the crankcase to a connection on the
alternator support. The alternator support has
an oil thermostat (arrow to the right).
A wax element in the oil thermostat opens the
supply flow to the engine oil cooler from an oil
temperature of 100 ºC to 130 ºC.
A partial amount of engine oil will permanently
bypass the oil thermostat, even when it is fully
open and flows uncooled through the engine.
The engine oil cooler helps to keep the engine oil
temperature below 150 ºC.
KT-9644
42-02-16
DSC00629
