45
1
2
345
678
9 10 11
12
12
13
14
13 12
15
16 17
18
19 20
21
22 23
4.11 V-belt tension check and adjust
Check the V - belt tension pressing with thumb midway
between the pulleys to see whether the belt deflects. The
deflection should not be more than
10mm ~ 15mm, if necessary re-adjust the belt tension.
For the adjustment of the tension, loosen the adjusting nuts
which support the alternator, adjust the tension and tighten
the nuts again.
Alternate method of checking belt tesion
To check the tension of the V-belts, use a tension gauge
(see fig.)
- Place indicator arm 1 into gauge
- Position gauge on V-belt 2, midway between the
pulleys, with flange 3 on bottom of gauge against the
edge of belt.
- Push slowly on the black pad 4 at right angles to belt
2 until the spring is heard or felt to trigger.
- Carefully remove the gauge without altering the
position of the indicator arm 1.
Read off the value where the black indicator arm 1 intersects
scale 5 (arrow).
- If necessary, retension belt and measure again.
4.12 Turbocharger
The exhaust gases of the engine are passed through the turbine rotor of the turbocharger. Air compressor
impeller mounted on the same shaft draws in fresh air and delivers it at a higher pressure to the cylinders.
The turbocharger is naturally air-cooled. Lubrication of the main bearing is by oil under pressure from the
engine lubricating system.
Note – Check tension and change belts
only when engine is at
standstill. Refit belt guard, if
provided.
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