Fan Belt Tension

[Rich Largent]

I just purchased a 1929 Closed Cab Pickup. The previous owner had a friend install a rebuilt generator and he apparently forgot to tighten the fan belt properly or in the hour I have run it since getting it home it has loosened up. I'm no stranger to shade tree work but before I tighten the thing I'd like to know if there is a proper tension and or tension test of which I should be mindful.

Rich Largent

 

[MCHinson]

Without pulling out the books and giving you a technical answer, just tight enough so the generator turns and charges. You do not want it too tight.

 

[Mitch//pa]

about a 1" deflection is sufficient

 

[Mike V. Florida]

Too tight and the water pump shaft will wear. About 1" as stated is good. As long as it spins the generator it's fine.

 

[Tom Wesenberg]

Midway between the generator and water pump, I can move my belt in and out about 1 1/2". Nothing slips and there is no strain on the bearings or belt.

 

[Rich Largent]

Thanks everybody. Common sense rules, I know, but sometimes what seems common doesn't always make sense.

 

[Mike V. Florida]

Thanks everybody. Common sense rules, I know, but sometimes what seems common doesn't always make sense.

ALWAYS better to ask!

 

[astrocruiser]

Midway between the generator and water pump, I can move my belt in and out about 1 1/2". Nothing slips and there is no strain on the bearings or belt.

ALWAYS better to ask!

better read first than be sorry
i just double checked it on this thread same as Tom Wesenberg said i'll go for 1 1/2". cheers! Time to look for accessory belt tension spring. sigh. giving me a hard time.