Fig. 57 Replacing the engine belt
1
Tensioning roller (tensioning device)
2
Engine belt
3
Ratchet
4
Engine generator
5
Crankshaft
6
Coolant pump
A
Drive belt progress
Removing the engine belt:
1. Insert the ratchet with the proper insert in the tensioning device (onto the tensioning roller).
2. Use the ratchet to swivel the tensioner roller upward (direction of the arrow).
The engine belt is free of tension.
3. Remove the engine belt.
4. Return the tensioning roller to its original position.
5. Visually inspect the tensioning device and the pulleys for:
■ dirt
■ wear and tear
─ broken bearings in tensioning roller and pulleys
─ profile wear of the pulleys
Result Contaminated components: Clean the components.
Worn components: Have worn components replaced.
Placing the engine belt:
A belt that has been removed may not be used again.
Please note the image 57 showing the progress of the engine belt.
1. Use the ratchet to swivel the tensioner roller upward.
2. Manually route the new engine belt over all pulleys without using force.
3. Return the tensioning roller to its "tensioning position" and thus tension the engine belt.
4. Remove the ratchet and check the proper seating of the engine belt on the pulleys.
Old engine belt should be disposed of in accordance with the latest environmental regula‐
tions.
10 Maintenance
10.4 Engine maintenance
No.: 9_9570 07 USE
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
137