new belts on diesel motor squeaking
Just had all the belts replaced on our diesel Freightliner chassis. Before we left we noticed they were squeaking very loudly. We had the repair man check them. He sprayed belt dressing on them and...
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The Caterpillar C7 very likely has two belts:
An old fashion V belt that drives only the water pump. So, crankshaft pulley, water pump and manually adjusted idler pulley. THIS BELT IS CRITICAL-- if loose, the water pump may not turn and engine will overheat. It can only be checked from below-- driver's side of engine between block and fan shroud. It doesn't need to be bar tight, but should not be loose.
The other belt is a serpentine belt which drives the accessories. So, crankshaft pulley, alternator, A/C compressor and automatic belt tensioner.
Here is a good video on belt tensioners from Gates Corp: https://www.youtube.com/watch?v=uTLV5IU_IMM
An old fashion V belt that drives only the water pump. So, crankshaft pulley, water pump and manually adjusted idler pulley. THIS BELT IS CRITICAL-- if loose, the water pump may not turn and engine will overheat. It can only be checked from below-- driver's side of engine between block and fan shroud. It doesn't need to be bar tight, but should not be loose.
The other belt is a serpentine belt which drives the accessories. So, crankshaft pulley, alternator, A/C compressor and automatic belt tensioner.
Here is a good video on belt tensioners from Gates Corp: https://www.youtube.com/watch?v=uTLV5IU_IMM
