MTU Detroit Diesel 183 Series Technical Publication page 385

Task Description
V-belt installation
1. Grooves must be clean and free from oil.
2. Check belt pulleys for axial alignment in at least two positions, offset by 180° to each other.
Deviation of pulley alignment, max. permissible:
Between pulley on crankshaft and pulley on alternator ± 2 mm
Between pulley on crankshaft and pulley on engine coolant pump ± 2.5 mm
Between pulley on generator (alternator) and pulley on engine coolant pump ± 3 mm
Between pulley on crankshaft and pulley on raw water pump ± 3 mm
The belt pulley of the raw water pump can, if necessary, be aligned with the crankshaft pulley (± 3 mm)
by releasing and then retightening screw No. 9 (see Page 2).
3. For multi-groove drive pulleys, replace V-belts only as complete sets.
4. V-belts must be fitted into the grooves without force: that means gensets to be driven must be released.
5. Lock clamping nuts (2 and 4) with clamping elements and securing screws on adjustable auxiliary gensets
(alternator and raw water pump) after testing the clamping forces.
Adjustment specifications:
Check strand pull of individual V-belts by means of Gates tension tester after approx. 5 engine revolutions. For
initial installation, individual tension must be 550 ± 50 N.
After approx. 15 mins. running under full load, carry out further checks with reference value (if necessary
adjustment value) 400 ± 50 N per belt.
Test specifications
1. Lower indicator arm in measuring device.
2. Place measuring device centrally between two belt pulleys.
The stop must be to the side of the V-belt.
3. With pushbutton, press down evenly at right angle to V-belt until click spring can be heard and felt to disengage.
Do not continue pressing, otherwise the indicated value is distorted.
4. Carefully lift the measuring unit without altering the position of the indicator arm.
5. Read off value of V-belt tension at intersection of crankcase scale and indicator arm.
(Measured value in kg x 10 gives strand pull in N).
6. Rectify V-belt tension as necessary and repeat measurements.
20080/1 E 98-12
Group 13
Subgroup 1001
Page 3