"I need a 120 amp alternator t
"I need a 120 amp alternator to charge a 400ah house bank. I am considering a duel mount. I have the standard engine set-up with the stock 3/8” belt driving both the fresh water cooling pump and the existing alternator. My local Volvo shop says that changing from 50 to even 100 amps will cause too much tension for the water pump.
Does anyone have experience with Volvos additional top mounting alternator unit kit and bracket? The kit also comes with a Volvo standard 50amp alternator and a 3/8"-wide, and bolt-on 5” diameter pulley. Larger alternators require a ½” belt or wider.
I need some practical experience advice!
First, most simply, has anyone run a 120amp alternator on the existing mount with the stock 3/8” pulley and not wrecked the water pump bearings or seal? Has anyone upgraded to a 100amp alternator using the 3/8” belt and pulley and not wrecked the water pump bearings and seal? What has been your largest size upgrade 70 amps?
Second, similarly, has anyone run a 120amp alternator on the additional mount using the stock 3/8” pulley and not had to change the belt more than a few times?
Third, most properly, has anyone found a larger-width (1/2”) pulley from Volvo or aftermarket that can be installed using the stock threaded holes on the given engine pulley? This way a large alternator could be installed per guidelines.
Thank you, all advice and related experience welcome!
best regards!"
"I need a 120 amp alternator to charge a 400ah house bank. I am considering a duel mount. I have the standard engine set-up with the stock 3/8” belt driving both the fresh water cooling pump and the existing alternator. My local Volvo shop says that changing from 50 to even 100 amps will cause too much tension for the water pump.
Does anyone have experience with Volvos additional top mounting alternator unit kit and bracket? The kit also comes with a Volvo standard 50amp alternator and a 3/8"-wide, and bolt-on 5” diameter pulley. Larger alternators require a ½” belt or wider.
I need some practical experience advice!
First, most simply, has anyone run a 120amp alternator on the existing mount with the stock 3/8” pulley and not wrecked the water pump bearings or seal? Has anyone upgraded to a 100amp alternator using the 3/8” belt and pulley and not wrecked the water pump bearings and seal? What has been your largest size upgrade 70 amps?
Second, similarly, has anyone run a 120amp alternator on the additional mount using the stock 3/8” pulley and not had to change the belt more than a few times?
Third, most properly, has anyone found a larger-width (1/2”) pulley from Volvo or aftermarket that can be installed using the stock threaded holes on the given engine pulley? This way a large alternator could be installed per guidelines.
Thank you, all advice and related experience welcome!
best regards!"