The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 Brake pedal return spring

dsraven · 08-30-2021, 11:58 PM

There has to be play between the belcrank pushrod, that pushes into the booster, and there also has to be play between the booster pushrod at the booster to master cyl end and the master cylinder piston. That is 2 different measurements at 2 different spots. Google the booster to master cylinder clearance for a better description but if worst case scenario, get the dimension that the booster rod sticks out past the master cylinder mount, then make sure that dimension is shorter than the depth of the end of the master cyl piston where the 2 come together.

08-30-2021, 11:58 PM	#38
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 7,837	Re: Brake pedal return spring There has to be play between the belcrank pushrod, that pushes into the booster, and there also has to be play between the booster pushrod at the booster to master cyl end and the master cylinder piston. That is 2 different measurements at 2 different spots. Google the booster to master cylinder clearance for a better description but if worst case scenario, get the dimension that the booster rod sticks out past the master cylinder mount, then make sure that dimension is shorter than the depth of the end of the master cyl piston where the 2 come together.