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I have a pressure washer which has a belt driven cat pump. The belt has just started to slip momentarily when idling.  Can anyone tell me how to tension the belts please.

Many thanks.

[Matt Gibson]

On my belt drive, the pump is bolted to adjustable mounts/feet. If i slacken off the bolts, i can push the pump back to tighten the belt, or forward to slacken it off.

I have also got threaded rods either side of my pump with nuts on it, if i tighten the nuts either side, the pump slides forward/back slightly.

You will probably have something similar where you can slacken the bolts of the pump and move it back to tighten the belt.

[BDCS]

You will also need to keep it square to the motor pulley - as its slipping I assume its a vee belt set up

[jim mca]

Undo the bolts on the trolley and push it a bit mine has an angle bar bolted on as a stopper