Power booster question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Primered_69 · 10-28-2002, 11:32 PM

Will the valve and master cylnder from a nonpower brake sytem work on a booster equiped truck?

*racedvl* · 10-29-2002, 12:16 AM

I think it depends on the year, but as far as I know the master is diffrent, but if you are not converting the drums to disk, I would think the valve is the same.

DanoDMano · 10-29-2002, 01:00 AM

I have a 70' and I just changed over to power
brakes. I changed the master cylinder for $18, Im not sure If I needed to, but the parts dude suggested it...

Power is a massive step upwards!!

Drums gotta go next........

Good Luck

JimKshortstep4x4 · 10-29-2002, 08:03 AM

The master cylinders are different because the piston on the non-power has a shallow hole where the rod fits and the power master cylinder has a deep hole. You should be ok on the valve unless changing to discs.

Jim

trukman1 · 10-30-2002, 12:01 PM

Careful about the deep vs shallow m/c piston. I have a dual diaghram power booster that has the short rod, therefore using the shallow piston booster. The unit came off a '72 Suburban. My other single diaphram boosters are the deep style. Incidently, there were two different "deep" pistons produced and one shallow version according to the GM manual I have.

10-28-2002, 11:32 PM	#1
Primered_69 Registered User Join Date: Sep 2002 Location: Fort Worth Posts: 1,409	Power booster question Will the valve and master cylnder from a nonpower brake sytem work on a booster equiped truck? __________________ 1969 Chevy LWB - with shaved handles; 3 1/2 front/ 5 1/2 rear drop; (waiting to be put back together)

10-29-2002, 01:00 AM	#3
DanoDMano Pronounced "Pew-al-up" Join Date: Oct 2002 Location: Puyallup, Washington Posts: 845	I have a 70' and I just changed over to power brakes. I changed the master cylinder for $18, Im not sure If I needed to, but the parts dude suggested it... Power is a massive step upwards!! Drums gotta go next........ Good Luck __________________ Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos

10-30-2002, 12:01 PM	#5
trukman1 Registered User Join Date: Apr 2001 Location: Beavercreek, Ohio 45431 Posts: 737	M/C piston recesses Careful about the deep vs shallow m/c piston. I have a dual diaghram power booster that has the short rod, therefore using the shallow piston booster. The unit came off a '72 Suburban. My other single diaphram boosters are the deep style. Incidently, there were two different "deep" pistons produced and one shallow version according to the GM manual I have.

10-29-2002, 12:16 AM	#2
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	I think it depends on the year, but as far as I know the master is diffrent, but if you are not converting the drums to disk, I would think the valve is the same.

10-29-2002, 08:03 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	The master cylinders are different because the piston on the non-power has a shallow hole where the rod fits and the power master cylinder has a deep hole. You should be ok on the valve unless changing to discs. Jim



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