46 Preliminary
PTS 916 Cd
5.8 Poly V-belt tension adjustment
5.8.1 Poly V-belt cooler fan
To check the poly V-belt tension, measure the belt frequency. Use
tensioning tool 2913 0022 00. The arrows show where the
frequency should be measured.
The correct belt frequency is 50 Hz ±2.5 Hz.
Correct the V-belt tension by loosening the fixing screw (1) of V-
belt tensioner (2). Loosen the lock nut on the adjusting screw (3).
Turn the adjusting screw clockwise to increase V-belt tension or
counter-clockwise to decrease V-belt tension.
After adjusting the V-belt tension, retighten the adjusting screw
lock nut and the fixing screw.
5.8.2 V-belts engine fan
To check the V-belt tension, measure the belt frequency.
Use tensioning tool 2913 0022 00.
Measure the belt frequency midway between the two pulleys (1)
and (2), shown with the arrows.
Correct the V-belt tension by loosening the four fixing bolts (2, 3)
on both sides of bearing housing. Turn the adjusting screw (1)
clockwise to increase V-belt tension or counter-clockwise to
decrease V-belt tension.
When the V-belt tension is within limit, retighten the fixing screws.
5.9 MP safety valve
– A check of the opening of the lifting gear, once a year.
– A check of the set pressure once a year according to the local
regulations. This check cannot be done on the unit and must be
carried out on a proper test bench.
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3
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2
All adjustments and repairs and following checks
must be done by an authorized representative of the
valve supplier.
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