MTU Detroit Diesel 183 Series Technical Publication page 389

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 tensioning roller ± 2 mm
Between pulley on crankshaft and pulley on engine coolant pump ± 2.5 mm
Between pulley on tension roller and pulley on engine coolant pump ± 3 mm.
3. V-belts must be fitted into the grooves without force.
4. After checking clamping forces, lock clamping nut 2 on tension roller by means of clamping element and
securing screw No. 1.
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.
Check tension by means of Gates tension tester:
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. (kg value 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 1001a
Page 3