1949 Delco Brakes Service Manual


	1949 Delco Brakes Service Manual (Courtesy of Pat Gizz)
	DELCO BRAKE SERVICE MANUAL

	is a positive recommendation of the motor car manufacturer that only linings approved and used for production be used for service. (See Figure 24.) Such linings, and shoe and linings are accurately machined, tested and approved thoroughly by the factory engineering and service departments. NOTE: All linings must be tight on shoe until a .008" feeler gauge cannot be inserted between the shoe and lining. Assemble adjusting screw spring at bottom of each shoe. Assemble adjusting screw, being certain that star wheel is opposite the adjusting hole in the backing plate. Make sure that the primary shoe is assembled on the forward side of the backing plate and the secondary shoe at the rear side of the backing plate. Assemble shoes to backing plate and assemble hold down pins, spring, and cups (See Figure 15). Assemble secondary shoe eccentric spring when used, retracting springs, and again be sure that all springs are in proper and original position and properly hooked. Remove wheel cylinder piston clamps. 13. On 1936, 1937, and 1938 models and Pontiac 1942-48 models, back off eccentric by turning it in opposite direction to the forward motion of the car wheels, using box socket wrench and screw driver (See Figure 17). Then release the adjusting screw until the drum will slide freely over the shoes. Assemble the drums and wheels. On all other models, release adjusting screw and see that shoes are centralized before assembling the drum. 14. Inspect front wheel bearings, wash and clean thoroughly, and repack with grease recommended by car manufacturer. Be sure bearings are assembled and adjusted properly and cotter pins are used and locked in position. 15. Proceed with brake adjustment, etc., as outlined under "Major Adjustment," Page 14.) 16. Be certain to reassemble inspection hole covers on all drums and adjusting hole covers on all backing plates. 17. Be certain all wheel bolts are tight, hub caps securely installed. Then road-test the car. Check parking brake, observing when using	same if rear brakes are uniform. If they are not, loosen adjusting screw on tightest brake not over two notches. If more than two notches are required, check brake cable adjustment. BRAKE PEDAL ADJUSTMENT The only brake pedal adjustment fundamentally necessary is that required to have a full pedal stroke and to permit full release of the piston primary cup past the compensating hole. (See Figure 3.) NOTE: Before attempting to adjust the pedal stop position, be certain the pedal returns to the stop freely and does not bind on the pedal shaft. Inspect the pedal retracting spring to make sure it has not lost its tension. On all cars not having a provision for pedal stop incorporated in the master cylinder push rod construction, all adjustments should be made so the pedal will stop against the stop provided by the car manufacturer. On those cars having provision for pedal stop incorporated in the master cylinder push rod construction, an approximate 1/2" clearance (See Figure 6) should be maintained between the pedal arm and the underneath side of the toe board or nearest point of interference such as felt retainer. On current Olds, 3/16" compression of the rubber is recommended. When pedal adjustments are incorrect, proceed as follows: 1. Loosen the push rod or linkage lock nut and turn the master cylinder push rod. 2. When the correct adjustment is obtained, be sure to tighten the lock nut securely while at the same time holding the push rod to keep it from turning. LUBRICATION OF PARKING BRAKE CABLE 1. Clean the cable from conduit to cable end. 2. Disconnect the conduit at the frame bracket and backing plate. 3. Slide the conduit forward on the cable. 4. Clean the cable, examine for broken strands, and apply Delco Brake Lube to the cable. 5. Reassemble, and be certain there is no bind or drag in the hand brake lever in the rear brake assemblies.

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