Repair Manual

VALUES AND SETTINGS
07
07 - 5
DRIVING BELTS TIGHTENING AND TIGHTENING CHECKING
The checking of the belt tightening may be done by means of the MOT 557 device which
has two scales; one shows the arrow’s value ,and the other implicitly translates the value
of the tension ( force ).
When checking and adjusting the belts tension, observe the following procedure:
∗ stretch the belt for which the tension is to be determined;
∗ place the big “O” ring on the scale at the arrow imposed value ( 2mm ; 4,5mm;
3,5 mm or 7,5 mm for the belts 1; 2 ; 3 or 4);
* place the small ”O” ring on the scale at zero value;
∗ place a metallic graduated rule on both pulleys;
* place the device at half- and vertical on the rule ( 1- distance between pulleys axles).
BELT
ARROW f
(mm)
F
ORCE N (N)
M
OUNTING AFTER 5 min.
A
FTER 500 km.
1
2
3
4
between compressor
- alternator
between crankshaft-
compressor
between crankshaft-
water pump
between crankshaft-
water pump -
alternator
2
4,5
3,5
7,5
14 +/- 15%
17 +/- 15%
7.5 +/-15%
30 +/-15%
14 +/- 15%
17 +/- 15%
7.5 +/- 15%
30 +/-15%
11 +/- 15%
13 +/- 15%
5.5 +/- 15%
-
VEHICLE
OPTIONALS
with AC
without AC
Force
Arrow
Ring 0 big Ring 0 small
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