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7.11.3
Drive belt – Tension check
Preconditions
☑
Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation
/
Use
Part
No.
Qty.
Belt tension tester, 500-1400 N
Y20097430
1
Belt tension tester, 1300-3100 N
Y20097431
1
Fan drive – Belt tension check
1.
Remove protective cover.
2.
Set belt tension tester onto the drive belt
in the middle between the belt pulleys (ar-
rowed).
3.
Using pushbutton, press vertically on top
side of drive belt exerting even pressure
until spring disengages noticeably.
4.
Do not press any further, otherwise the dis-
play value will be falsified.
5.
Take off tension tester without changing
the position of the display arm.
6.
Read off measured value at the intersec-
tion of display arm and "KG" scale. For
specifications, refer to table below.
Application
Measured value
Initial assembly
Measured value
Operating tension after
1 hour
Measured value
Minimum operating
tension
Fan
drive
belt
2250
N
1620
N
1080
N
7.
If the measured values deviate from the specifications above, adjust drive belt tension (→ Page 115).
8.
Install protective cover.
Engine coolant pump drive –
Belt tension check (engine with
mechanical belt tensioner)
1.
Remove protective cover.
2.
Set belt tension tester onto the drive belt
in the middle between the belt pulleys (ar-
rowed).
3.
Using pushbutton, press vertically on top
side of drive belt exerting even pressure
until spring disengages noticeably.
4.
Do not press any further, otherwise the dis-
play value will be falsified.
5.
Take off tension tester without changing
the position of the display arm.
6.
Read off measured value at the intersec-
tion of display arm and "KG" scale. For
specifications, refer to table below.
MS150076/05E 2014-02
| Task Description | 117
T
I
M
-
I
D
:
0
0
0
0
0
0
0
8
9
7
-
0
0
3