1949 Delco Brakes Service Manual

(Courtesy of Pat Gizz)

DELCO BRAKE SERVICE MANUAL
same for all models except for slight variations as listed under "Brake Shoe Removal—1-1/2 Ton and C.O.E." above.
1.  Reassemble toggle lever to new shoe assembly, making sure that the high side of the eccentric on the bolt is towards the brake shoe facing. A flat has been ground on the bolt head to indicate the high side of the eccentric. (This eccentric bolt is used to adjust the clearance between the emergency brake extension and the toggle link.)
2.  Reassemble articulating links, pins, friction springs, and locks to new brake shoes and as­semble shoes to anchor plate.
3.  On rear brakes, hook-up toggle lever to emer­gency brake cable.
4.  Place spring on emergency brake extension link and line up slot of the link so that it will straddle toggle lever.
5.  Install conical brake shoe guide springs, brake shoe retracting spring, and remove wheel cyl­inder clamp.
6.  Check with a .002" feeler to make certain the shoes are against the pads on the brake flange plate. Figure 25. If the shoes do not touch all pads it may be necessary to raise the low thrust pad with a screw driver to correct this condi­tion.
7.  When replacing rear brake drums, make sure the tongue in the web section of the drum ex-
tends into the drain hole in the axle shaft flange. This serves as a position locating point to line up the hole in the drum with the drain hole in the axle shaft flange.
Whenever a brake drum has been removed for replacement of brake shoes or for shoe adjust­ment, it will be necessary to depress the foot pedal firmly to align the brake shoe articulat­ing links before linking brake adjustments.
EMERGENCY BRAKE TOGGLE LEVER ADJUSTMENT
Whenever new rear brake shoes are installed on the passenger car, 1/2 ton and all 3/4 ton trucks, it is necessary to adjust the toggle lever with the emer­gency brake extension link, by means of the eccen­tric bolt. This can only be done correctly AFTER the hydraulic service brake adjustment has been made and the brake shoes are in a fully released position,
1.  Remove brake drum and loosen eccentric bolt lock nut.
2.  Hold the toggle lever against the shoe and turn the eccentric bolt until there is only a slight clearance between the lever and the bottom of the slot in the emergency brake extension link.
3.  Tighten eccentric bolt lock nut and again check for clearance.
4.  Replace brake drum, adjust emergency brakes and road-test for performance.
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