Question about 1991 Chevrolet S-10 Blazer

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I need to replace the rear wheel cylinder and break shoes

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Check out the video at 1A auto parts. Just enter Chevy S 10 blazer rear drum brake replacement on U tube and it should pop up. It's very informative. Also the Hanes manual has good instructions on how to do it. The wheel cylinder is a problem for me. The 91 and earlier S10 Blazers have a locking ring that's a real SOB to get out. I cut a couple of coat hangers just past where they curve up so there's a curved end on my homemade brake tool. I plan to put them under the tabs on the lock ring, grab them with a vice grip, then pull straight up. the manual says to pull both sides at the same time. Hopefully it will come out. Good luck to us both! On the 92 and later models there are two small bolts underneath the large bolt on the top of the backing plate. Remove the two small bolts, while taking care not to damage the brake lines. Do not remove the large bolt.

Posted on May 19, 2014

So what is the question?
Nothing odd there,same a 55 chevy

Posted on Nov 07, 2010

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I need a schematic for the rear brakes on an F150 super cab with 4.6L automatic trans 4wheel drive


Drum, Rear Brake System Standard Rear Brake
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Item Part Number Description 1 2069 Brake Shoe Hold-Down Spring Pin 2 — Rear Wheel Cylinder Retaining Bolt (2 Req'd) 3 — Washer (2 Req'd) 4 — Anchor Pin (Part of 2211) 5 — Wheel Cylinder 6 2028 Brake Shoe Anchor Pin Guide Plate 7 2A637 Parking Brake Lever 8 2296 Brake Shoe Retracting Spring (Short) 9 2296 Brake Shoe Retracting Spring (Long) 10 2200 Rear Brake Shoe and Lining (Secondary) 11 — Washer 12 2106 Parking Brake Lever Pin Retainer 13 — Brake Shoe Adjusting Lever Cable Guide 14 2A642 Primary Brake Shoe Parking Brake Lever Link 15 2A601 Parking Brake Link Spring 16 2068 Brake Shoe Hold-Down Spring 17 2A176 Brake Shoe Adjusting Lever 18 2048 Brake Shoe Adjusting Screw Socket 19 2047 Brake Shoe Adjusting Screw Nut 20 2041 Brake Adjusting Screw 21 2049 Brake Shoe Adjusting Screw Spring 22 2200 Rear Brake Shoe and Lining (Primary) 23 2A178 Brake Shoe Adjusting Lever Cable 24 2211 Brake Backing Plate
Heavy Duty Rear Brake
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Item Part Number Description 1 — Rear Wheel Cylinder Retaining Bolt 2 00538 Lock Nut 3 2212 Rear Brake Backing Plate 4 2262 Rear Wheel Cylinder 5 2A642 Primary Brake Shoe Parking Brake Lever Link 6 2A601 Parking Brake Link Spring 7 2A637 Parking Brake Lever 8 2106 Parking Brake Lever Pin Retainer 9 — Parking Brake Lever Bolt 10 — Secondary Shoe Assembly 11 2A179 Brake Shoe Adjusting Lever Cable Guide 12 2068 Brake Shoe Hold-Down Spring 13 — Adjusting Lever Pin 14 — Adjusting Lever Return Spring 15 2A176 Brake Shoe Adjusting Lever 16 2047 Brake Shoe Adjusting Screw Nut 17 2049 Brake Shoe Adjusting Screw Spring 18 2041 Brake Adjuster Screw 19 — Primary Shoe Assembly 20 2068 Brake Shoe Hold-Down Spring 21 2200 Rear Brake Shoe and Lining 22 2035 Brake Shoe Retracting Spring 23 2A178 Brake Shoe Adjusting Lever Cable 24 2092 Brake Adjusting Hole Cover 25 2069 Brake Shoe Hold-Down Spring Pin
The rear drum brakes:
  • Have internal shoes that expand against the brake drum (1126).
  • Are a single-anchor type.
  • Are actuated by one rear wheel cylinder (2262).
  • Have two pistons in the rear wheel cylinder (2261). One exerts force against the upper end of the primary shoe; the other exerts force against the upper end of the secondary shoe.
  • Adjust rear brake shoes and linings (2200) automatically.
  • Need manual brake adjustment if the adjusters are not operating properly or after the rear brake shoes and linings have been replaced.
When the brake pedal is applied, hydraulic fluid pressure forces the pistons in the rear wheel cylinder outward, moving the rear brake shoes and linings against the brake drum.
The rear drum brake system includes the parking brake mechanism. Refer to Section 206-05 .

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The Chardes have a diagonal split system, so one of the front discs is plumbed to the diagonally located rear drum.

You may need to check the front brakes too and that they have been bleed properly.

Other common cause of uneven braking are:

seized wheel cylinder;
brake hose obstruction or weakend wall;
weak pull off spring on shoe;
uneven drum roundness;
compensator/proportioning valve dicky.

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