1928-59 GM Disc Brake Conversion Kits CP702, CP706, CP711 Installation Instructions
Instructions:
1. Remove early Chevy drums, brakes and backing plates from spindles. Make sure you retain the bearing nut and keyed washer.
2. Thoroughly clean grease and dirt from spindle. Check for cracks or damage.
3. Using one of the original bolts in the forward hole re-install the steering arm in its stock location on the spindle. Using the hardware supplied in the kit install the caliper mounting bracket on the rear of the spindles as shown in the figure. Insert the 1/4’’ thick round spacers between the braket and the spindle. Check for adequate clearance between the bracket and spindle. Trim bracket if necessary.
4. Examine the inner wheel bearing seating area on the spindle for nicks, etc. VERY IMPORTANT: Emery cloth area as required for a smooth surface.
5. Slide bearing adapter on new smooth surface spindle and drive into place using a hammer and a piece of tubing or pipe of suitable dimensions (1 1/2” pipe works great).
DO NOT DAMAGE THE ADAPTER WHILE INSTALLING (use a rag for padding between tool and adapter). Drive adapter on until it seats firmly against spindle inner bearing shoulder.
6. Remove bearings and inner seal from GM rotor. Remove GM inner bearing race and replace both the race and inner bearing assembly with that from a ‘71-’80 Pinto or ‘70-’78 Mustang. This is a widely used Ford inner wheel bearing that is readily available. It is also known as as A-13 inner bearing and consists of a L68149 cone and a L68110 race. Install a standard GM inner seal (National #8871).
7. Install rotor on spindle making sure that inner bearing seats all the way onto bearing adapter.
NOTE: bearings and adapter are machined to a ±.0005” tolerance. If bearing does not slide onto adapter easily it may be due to tolerance “stack-up”. This can be rectified by a small amount of fine emery “paper-work” on the bearing seating surface of the adapter.
8. Install GM outer wheel bearing followed by the 3/4” I.D. x 1/4” spacer (supplied in kit) and then the stock Chevy keyed bearing retaining washer and retaining nut. Adjust bearings a required and install cotter key and bearing dust cover.
9. Clean and inspect caliper for damage, leaks, etc. install caliper on mounting bracket WITH BLEEDER FITTING UP using stock GM mounting bolts. Make sure the bolts aren’t bent or damaged before installing.
10. Fill the brake system with the correct fluid, bleed and inspect for leaks.
11. Check for any brake caliper /rotor/ wheel interference.
12. A proportioning valve may be required.*
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