Booster with 72-73 Truck Master Cylinder?

Suspension, Brakes, Tires, Wheels etc..

Booster with 72-73 Truck Master Cylinder?

Postby Conrad » Tue Apr 11, 2017 10:52 am

Hi all,

I've been reading all the Scarebird posts, and am following the Scarebird parts list and have found a 72-73 truck master cylinder to buy. I'd like to also use a 7" Booster with it (future towing) but all the boosters that match the 4 post MCs are 'big' 8" Bendix compatible boosters. Which would be fine, but I have a 440 that I think will be too wide for the booster.

One thought was to start out with the 72-73 MC and see how that works without a booster. But I'd rather not burn the $$$ to buy the MC if it won't be compatible with any currently available boosters.

The other option? is to get a 7" A-body dual reservoir setup but not sure how fabrication work will be required to adapt the pedal to the booster.

I already am needing to think about finding an automatic pedal assembly to put in place of the original clutch assembly that was original to the truck.

Appreciate the thoughts.

Conrad
'64 Utiline CSS "Snowflake" 440-727
Thank you Terry!
Conrad
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Re: Booster with 72-73 Truck Master Cylinder?

Postby PwrWgnDrvr » Tue Apr 11, 2017 11:34 pm

The auto pedal assy is the same as the manual except there is a spacer on the shaft where the clutch pedal would be. You can make that spacer by cutting the pedal arm off.
PwrWgnDrvr
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Re: Booster with 72-73 Truck Master Cylinder?

Postby Conrad » Mon Jun 05, 2017 5:54 am

I've put the (NORS) 72 truck master cylinder I bought back up on eBay. It is a 1" Booster and I am going to go with a 15/16" Booster. I never knew why my '74 Scamp brakes were so sensitive and now I know - it had front disc brakes with the 15/16" MC + Booster. I felt like I could stop on a dime.

The 4 post MC will work with my manual brakes until I figure out the booster solution. I just now need to modify my MC pushrod or possibly get an adjust one with a pushrod (locking) seal.
'64 Utiline CSS "Snowflake" 440-727
Thank you Terry!
Conrad
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Posts: 141
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