8.19 Fan Drive
8.19.1 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 138):
• 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.
MS15018/03E 2016-02
| Fan Drive | 135
TIM-ID: 0000000045 - 006
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