10.3.6 Drive belt maintenance
The life of the drive belts is influenced by belt tension.
■ Slack belts can slip and become damaged and may result in engine overheating.
■ Over-tight belts stretch and wear quicker. Over-tight belts also place unnecessary stress on
bearings and shorten their life.
Material V-belt tension measuring device
Spares
Precondition The machine is shut down.
The machine is fully vented, the pressure gauge reads 0 psig.
The machine is cooled down.
All compressed air consumers are disconnected and the air outlet valves are open.
Negative cable to the batteries disconnected.
Beware of rotating pulleys and moving belts.
There is danger of serious injury from pinching.
➤ Never check the drive belts unless the engine is at standstill.
➤ Never run the machine without a belt guard.
➤ Open the cover.
10.3.6.1 Visual inspection
Precondition Belt guard is removed
1. Check the belts thoroughly for cracks, fraying or stretching.
When damaged or worn: Replace the drive belt immediately.
2. Replace the belt guard.
3. Reconnect the negative battery terminal.
4. Close the cover.
10.3.6.2 Checking belt tension
Check belt tension when the belts are warm, not hot, to avoid length variations through tempera‐
ture.
The engine manufacturer recommends a tension measuring device for belts. See the engine serv‐
ice manual.
The belt tension may also be checked by hand if no tension measuring device is available.
10 Maintenance
10.3 Engine maintenance
124
Operator Manual Screw Compressor
M27
No.: 9_9548 05 USE
Содержание M27
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