Yuchai U27, Instruction Manual

Page: 113 / 144

5-25
Other maintenance for engine
Warning: To prevent injury, do not maintain the engine while the engine is running. If
maintenance must be performed while the engine is running, the operation shall be
performed with at least two people and the following regulations shall be followed:
One person shall sit in the operator’s seat and ready to shut down the engine at any time.
All personnel shall keep in touch with each other.
During operating close to the fan, fan belt or other rotating parts, there is a danger of being
caught by the parts, so pay special attention.
Do not drop or insert tools or other objects into the fan or fan belt. Otherwise, the parts
may break or fly out.
Warning: If the noise of the machine is too loud, it will cause temporary or permanent
hearing problems. During performing engine maintenance and prolonged exposure to
noise, wear earmuffs or earplugs.
⚫
Check the tension of the fan belt
Perform the first inspection after new machine works for
50 hours. Check every 100 hours thereafter.
In order to ensure the normal operation of the generator
and the service life of the belt, the fan belt shall be
properly tensioned.
For a correctly tensioned belt, apply 10 kg perpendicular
to the belt between the fan pulley and the generator
pulley, and the sinking amount for the belt is about 10
mm.
If the belt is found to be damaged, it shall be replaced.
⚫
For the maintenance cycle and specific methods of other components of the engine, please refer
to the "Diesel Engine Operation Manual" attached to this machine.