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8.18 Fan Drive
8.18.1 Fan drive – Drive-belt check and adjustment
Preconditions
☑
Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Belt tension tester
5505890119/00
1
Torque wrench, 20–100 Nm
F30026582
1
Ratchet adapter
F30027340
1
Engine oil
Preparatory steps
u
Remove protective cover.
Drive belt – Condition check
1.
Visually inspect condition of drive belt.
2.
Replace drive belt (→ Page 153):
• If belt is oily;
• If belt shows signs of overheating;
• If belt is cracked;
• If belt is worn;
• If belt is chunked
Drive belt – Tension check, var-
iant A
1.
Place belt-tension tester onto drive midway
between the belt pulleys (arrowed).
2.
Actuate pushbutton to press the tester uni-
formly on the drive belt surface until the
spring disengages.
3.
Do not press any further, otherwise the dis-
play value will be falsified.
4.
Take off belt-tension tester without changing
the position of the indication arm.
5.
Read off measured value at the intersection
of indication arm and "KG" scale. The speci-
fied values are listed in the table below.
Application
Specified value (new drive belt) Specified value (used drive belt)
Drive belt of fan drive
660 N
510 N
6.
If the measured value does not correspond to the specified measured value, adjust the drive belt tension.
150 | Fan Drive | MS15019/04E 2016-02
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