SKU: 78811587935

Ultima | Rear Brake Wheel Cylinder RHS R/L | Coaster BB21 HZB30 Dyna BU6# 1982–1993 | JB3138

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Description

Ultima | Rear Brake Wheel Cylinder RHS R/L | Coaster BB21 HZB30 Dyna BU6# 1982–1993 | JB3138Ultima Rear Brake Wheel Cylinder RHS R L (JB3138) for Toyota Coaster BB21 HB30 HZB30 RB20 & Dyna BU6# YU6# 19821993 This Ultima Rear Brake Wheel Cylinder (JB3138) is designed as a high quality, direct OE replacement for the Rear Right Hand Side (RHS) of various Toyota Coaster buses and Dyna light trucks. This part is the **Rear Lower (R L) or Trailing Shoe** cylinder, which is one of two cylinders mounted on the rear drum brake assembly for these

Ultima Rear Brake Wheel Cylinder RHS R/L (JB3138) for Toyota Coaster BB21/HB30/HZB30/RB20 & Dyna BU6#/YU6# 1982–1993

This Ultima Rear Brake Wheel Cylinder (JB3138) is designed as a high-quality, direct OE replacement for the Rear Right-Hand Side (RHS) of various Toyota Coaster buses and Dyna light trucks. This part is the **Rear/Lower (R/L) or Trailing Shoe** cylinder, which is one of two cylinders mounted on the rear drum brake assembly for these heavy-duty commercial vehicles. It fits models from the approximate 1982 to 1993 production range. This cylinder is a vital component in the rear drum brake system, converting hydraulic pressure into the necessary stopping force required by the brake shoes to ensure safe and dependable performance under high load conditions.

Features & Benefits:

  • Direct Fit OE Replacement: Designed to match the fit, form, and function of the original equipment wheel cylinder on the RHS Trailing Shoe position.
  • Heavy-Duty Construction: Built for durability and dependable braking performance in bus and light truck applications.
  • Reliable Braking: Ensures accurate hydraulic pressure transfer for consistent and responsive drum braking performance.
  • Corrosion Resistance: Manufactured from durable materials for protection against corrosion and wear.
  • Position Specific: Designed exclusively for the Rear Right-Hand Side (RHS), Trailing/Lower Shoe.
  • Complete Unit: Supplied ready to install with pistons, seals, and boots.

Technical Specifications

  • Brand: Ultima
  • Part Number (SKU): JB3138
  • Type: Brake Wheel Cylinder
  • Position: Rear Right-Hand Side (RHS) R/L (Trailing/Lower Shoe)
  • Vehicle Models: Toyota Coaster, Toyota Dyna
  • Series: BB21, HB30, HZB30, RB20 (Coaster), BU6#, YU6# (Dyna)
  • Years: 1982–1993 (Approximate range)
  • Use: Minibus / Light Truck

Vehicle Fitment Information

Make Model Series Years Position
Toyota Coaster BB21, HB30, HZB30, RB20 1982–1993 Rear Right (RHS) R/L
Toyota Dyna BU6#, YU6# 1984–1995 Rear Right (RHS) R/L

Important Information

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Shipping Notes
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Exchange/Return Notes
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SKU: 78811587935

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carolyn Lindstrom
Boise, US
★★★★★ 5
Great chew toy for dogs
Color: Yellow Nylon Swiss Cheese Wedge
Very suitable toy for dogs it’s too resistant. The material is good and very safe. The size is perfect for a larger dog. They love to chew on it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
S
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S. Rose
Natrona Heights, US
★★★★★ 1
WARNING - EXTREMELY SHARP AREAS
Color: Yellow Nylon Corn on the Cob, Color: Yellow Nylon Corn on the Cob
UPDATE: The 2nd one I ordered was exactly the same with the sharp parts in the same areas as the first one. I cannot stress enough that a few points are sharp enough to cut or badly scratch. So if you’re planning on putting some food on it so your pup can lick, this is not the product you want! This could still scratch or cut the gums if used as a chew toy too though. I was thinking about sanding the sharp points but then I have no idea if that exposes any chemicals somehow? Really wanted this to work out! I took this corn on the cob toy out of the plastic to wash it and before I even got to the sink I realized there were several areas that are super sharp. A few sharp enough that could cut or badly scratch! It was sealed in a plastic bag and shows no signs of being used so this defect must happen at the manufactures level. I added a video showing how easily it snags a cotton ball, cotton pad and even a beanie. Please thoroughly check your item before giving it to your pup! I was so excited to put some smashed banana on this thing and give it to my guy and thank god I checked it first! I’m going to return it and see if a 2nd one is any better and I’ll update if it is or isn’t. Also, the super sharp spots were very hard to photograph which is why I added the video.
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Reviewed in the United States on January 1, 2021
J
Verified Purchase
Jean Kanzler
Birmingham, US
★★★★★ 4
Nice toy
Color: Red Nylon Yellow Hotdog
It is cool, tough and hard. Just wish it was larger bc my dog is 80 pounds. It won’t fall apart in a day and made in the USA!
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Reviewed in the United States on October 14, 2024
A
Verified Purchase
Amazon Customer
Dallas, US
★★★★★ 5
good purchase
Color: Red Nylon Yellow Hotdog
This thing is great for hi anxiety dogs and dogs that ned to have something to do or to chew. It will take them a while to get through to it. I was told that it was indestructible but I knew if there was a dog that could do it, it would be mine, and she did. But it took her some time. But she loves it and it keeps her busy.
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Reviewed in the United States on July 24, 2025
M
Verified Purchase
Mary Ann
Cuba, US
★★★★★ 5
Cute and durable!
Color: Red, Color: Red
My dog absolutely loves this toy! I'm not sure why people are complaining it's too hard, it's a nylon dog chew toy, it's supposed to be hard. I love the little holes in the lattice top I can stuff with treats. It keeps my very (VERY) active dog busy for a long time. I would definitely recommend this if you have a power chewer. It's also super cute, I just love to see him tote around a piece of pie.
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Reviewed in the United States on May 15, 2021

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