Lombardini CHD series - Engine Systems; V belt; Cooling fan; Driving pulley (2ª P.T.O.)

- 29 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
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"V" belt
Danger – Attention
Check the belt tension only when the engine is not running.
Tension adjustment:
LoosenalternatorxingboltsC.
Stretch belt so that a 100 Nm load located half-way between the
twopulleyscausesa10÷15mmexure.
PullstronglyalternatorexternallyandtightenxingboltsC.
Thenaltorquemustbe40Nm.
If you use the belt tension gauge type DENSO BTG-2, the correct
value of tension must be from 20 to 25 kg.
Disassembly / Reassembly
Tank
Danger – Attention
To avoid explosions or re outbreaks, do not smoke or use
naked ames during the operations.
Fuel vapours are highly toxic. Only carry out the operations
outdoors or in a well ventilated place.
Keep your face well away from the plug to prevent harmful
vapours from being inhaled. Dispose of fuel in the correct way
and do not litter as it is highly polluting.
Remove fuel line and loosen clamp screws.
Completely empty the tank and check that no impurities are
found inside.
Check that cap breather hole is not clogged.
Driving pulley (2
a
P.T.O.)
The maximum torque that can be drawn from the second power
take-off must be at maximum 70 Nm.
The driving pulley drives the alternator and the water pump and
consequently the cooling fan.
Bolt D can be loosened by turning clockwise. When retting
lubricate the bolt with Molyslip and tighten it at 360 Nm.
Cooling fan
Danger – Attention
Before disassembling the cooling fan, isolate the positive
battery cable to prevent accidental short-circuiting and,
consequently, activation of the starter motor
Take off the fan and check that all blades are not damaged; if
any are damaged, replace the entire fan.
Depending on the type of application the cooling fans can be suction
or blower fans and can differ in diameter.