Yuchai YC135, Operation And Maintenance Manual

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19.3.2. Fan belt adjusting
Check the fan belt tension:
the belt tension should normally deflect by 10 ÷ 15 mm when pressed with the
finger at a point midway between alternator pulley and fan pulley.
Adjusting the fan belt tension:
What prepare:
•
a metal bar;
•
a piece of wood.
1. Put the metal bar between the alternator (3)
and the engine, to keep the alternator fixed.
Put the piece of wood between the metal bar
and the alternator, to prevent the latest may be
damaged.
2. Loose bolt (1)and nuts (2).
3. Move the alternator (3) so that the fan belt deflect is in 10 ÷ 15 mm.
4. Tighten bolts and nuts (1) e (2) to fix the alternator (3).
Check that all pulleys are not damaged, also that the V rut is not damaged.
Particularly, check if the belt do not touch the bottom of the V rut.
If the belt can not be adjusted, or if it cut or damaged please contact
YUCHAI
ENGINEERING MACHINERY CO. LTD. to replace it.
Metal bar
Piece of wood