Yuchai YC135, Operation And Maintenance Manual

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7.1.2. Check and replacing engine oil
1. Open the engine hood.
2. Remove the dipstick (1) dry it with a clean duster.
3. Insert the dipstick completely in is tube then
remove it again.
4. On the dipstick you must check the oil level it
have to be in middle between two line. If the oil
level is under the low
line (A), replace the oil
up to the middle by put
it through the oil muff
(2).
5. If the oil is over the upper line, drain the oil in a pan unfasten the drain plug.
Then check the level again.
6. When oil level is correct insert the dipstick and fast the drain plug tightly,
then close the engine hood.
NOTICE: If the engine has run, wait for 15 minutes before check oil level. If
the machine is on a slope, travel it on a level round before check the oil level.
7.1.3. Inspecting and adjusting the fan belt
1. Open the engine hood.
2. Press at the centre of the fan pulley and alternator pulley and check the
tension.
Pressure: about 10 kg.
The slack should be about 10 -15 mm.
3. Replace the fan belt if:
- there are cuts or crack;
- the belt is worn and touches the bottom of the V groove in the pulley;
- the belt stretches and cannot be adjusted.
To adjust the tension see the paragraph “FAN BELT ADJUSTING”.
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