Air Pressure

denochs · 04-28-2010, 10:17 AM

Does anyone know why my air pressure goes up to 120 lbs and then drops off to 109 and will not return to 120 (according to the dash guage)? When airing up the tires the most pressure I could put in them is 106 lbs. on my tire pressure guage.

Dave

bdpreece · 04-28-2010, 10:49 AM

Your air compressor is set to cut off at approx 120 lbs. It then does not kick back on until pressure drops down to around 100 lbs. Since your tires and air tank balance out at about 106 you don't put any more air in the tire. When using the on board compressor I just hold down on the quick disconnect for my line and drain enough air to get the compressor to kick in. Some times I have to do this several times just to get up to 110 lbs which is what I run.

Cruzer · 04-30-2010, 09:02 AM

It also helps to set the cruise control to it's fast idle position to spin that compressor a bit faster. I have to time my last few pounds just right to catch it just before it cuts out in order to get 120 PSI in the front tires. Someday I'll get an air transformer from www.dickmantires.com and then the pressure output by the auxiliary air connection will be higher. That'll make my impact wrench work better too.

denochs · 05-02-2010, 07:56 AM

Thanks for the replies folks

I thought we might have a problem in the air pressure not getting up to 120. But it sounds like the 100+ lbs in the tires will not allow the compressor to come on until I try to bleed the air down enough to get the compressor running.

Dave