FRP Headache
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Senior User
Joined: Oct 2006
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From: south cali
FRP Headache
Well, i tried shimming the regulator following a pdf link i got here. Upon installing a 4-40 bolt ground down to the thickness of a nickel (.065)and starting my truck, pressure went clear over and pegged the gauge. So i have been removing material from the bolt head to the point where the bolt is now thinner than a dime, (.040 aprox) and the lowest i have been able to get the pressure is 80lbs. I cant seem to be able to bring it to the 70psi range. I ground one bolt to the point where it just didnt make a differnce if it was there or not. pressure was still 55.
Is there something i am doing wrong here, or what???
My stock pressure was at 55psi and went down to 50 wot.
The current shim now is putting out 82psi 60 wot.
I do have a Cali truck... so not sure if that has anything to do with it.
Is there something i am doing wrong here, or what???
My stock pressure was at 55psi and went down to 50 wot.
The current shim now is putting out 82psi 60 wot.
I do have a Cali truck... so not sure if that has anything to do with it.
Hotshot
Joined: Nov 2006
Posts: 11,288
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From: North of Greenville
When you're working in the thousandths range with a grinder, it's tough to be extremely accurate. I think you're going to have to continue with the trial and error approach until you hit the sweet spot. I would suggest trying to split the difference between the "dime thickness" and the "no difference" bolts by going to about 2/3 the thickness of a dime. If the relationship is linear, which it is not, half-way would plant you in the upper 60's, so the 2/3 mark should put you in the lower 70's.
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From: south cali
Is there such a wide difference from one truck to another. According to the instructions, here http://community.webshots.com/album/38099902LAqFDW .075 should give you about 75psi. I am way under that and only at about .030 now, and still i am getting 80psi.
im stumpped, and to top it off, the rubber seal on the return line is not sealing anymore.... do you guys know if this can be purchased somewhere other than the dealer.???
im stumpped, and to top it off, the rubber seal on the return line is not sealing anymore.... do you guys know if this can be purchased somewhere other than the dealer.???
Post Fiend
Joined: Sep 2006
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From: Millbrook Alabama
Originally Posted by UcaN
Is there such a wide difference from one truck to another. According to the instructions, here http://community.webshots.com/album/38099902LAqFDW .075 should give you about 75psi. I am way under that and only at about .030 now, and still i am getting 80psi.
im stumpped, and to top it off, the rubber seal on the return line is not sealing anymore.... do you guys know if this can be purchased somewhere other than the dealer.???
im stumpped, and to top it off, the rubber seal on the return line is not sealing anymore.... do you guys know if this can be purchased somewhere other than the dealer.???
The rubber seal kit can be bought from International, it is part no. (1P)1831296C92, or you can go to a hydraulics store and get a 5/16 OD flex fitting sleeve.
Post Fiend
Joined: Sep 2006
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From: Millbrook Alabama
Originally Posted by UcaN
Thanks BD
So I'm ok with 80-82 idle psi??? I thought i read somewhere it is not recommended to go over 75psi.
Thks for the seal info. Stealership wants $18 for a 3pc kit.
So I'm ok with 80-82 idle psi??? I thought i read somewhere it is not recommended to go over 75psi.
Thks for the seal info. Stealership wants $18 for a 3pc kit.
there are also folks running around with more than 80PSI .
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