Drive belt – Tension check, var-
iant B
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 670 N -50 N 570 N -50 N
6. If the measured value does not correspond to the specified measured value, adjust the drive belt tension.
Drive belt – Tension adjustment,
variant A
1. Release screws (3).
2. Release locknut (2).
3. Screw in screw (1) to tension drive belt.
4. Tighten locknut (2).
5. Check drive belt tension.
6. Tighten screws (3) to specified torque using a torque wrench.
Name Size Type Lubricant Value/Standard
Screw M18 Tightening torque (Engine oil) 100 Nm
136 | Fan Drive | MS15018/03E 2016-02
TIM-ID: 0000000045 - 006
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