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

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SKU: 78811587935

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DDT
Louisville, US
★★★★★ 5
Great fun for our dogs!
Style: Original
My dogs can’t get enough of this very noisy ball. We have one outside and one in their playroom. It is very noisy. It is very hard. So, I’d say a room with fine furniture is not the place for it. Ours bang it around pretty good. Our boxer did split one, biting it. But, she’s a serious chewer! Our other dog carries it around sometimes but hasn’t been able to damage it yet. So, I’d say for most chewers it’s going to last a long time. It’s a great toy but in most households I’d say basement or outside. Again, it’s hard and did ding a few baseboards.
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Reviewed in the United States on March 27, 2026
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Luna Cherry
Dallas, US
★★★★★ 5
Superb!
Style: Original
My dog absolutely loves this ball. It's too big for him to fit all the way in his mouth, so it's held up pretty well and still makes the sounds.
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Reviewed in the United States on May 31, 2026
M
Verified Purchase
Matthew
Massapequa, US
★★★★★ 4
Fun, but buy a couple of them
Style: Original, Style: Original
She loves them. Great toy, but the product can’t hold up- purchased 4-11-2026
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Reviewed in the United States on April 15, 2026
K
Verified Purchase
Kay Cee
Birmingham, US
★★★★★ 5
Durable, Rugged, Dog Approved Fun!!
Style: Original, Style: Original
This thing is durable and worth every penny! I bought this over 5 years ago for my rescue and he STILL loves it. He plays with it near daily and it's got a LOT of love-work scrapes, scratches, and scuffs. But it still works perfectly!! Because he's on the medium side, he can't quite bite down on it. Not sure how it'd hold up to heavy chewers with larger mouths. But he can play with this solo for ages and has SO MUCH fun. We love to listen to his "conversations" as he gets into it with this ball. It's been a winner since the day we took it out of the box. It's also the longest lasting toy we still have! Everything else either wore out, was destroyed, or broke. This battery-free ball has made the cut for us.
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Reviewed in the United States on April 2, 2026
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Verified Purchase
Stephanie
Alexandria, US
★★★★★ 3
Lasted a day for my dog
Style: Original, Style: Original
My dog absolutely loved this toy, but sadly it didn’t even last a full day 😩 I’m not sure if that’s because I have a Rottweiler/Lab mix with the jaw strength of a tiny excavator, or if the durability just isn’t great. Within a few hours, he had already torn right through it 🥲 That said, the sound it makes had us cracking up and definitely kept my dog entertained and intrigued while it lasted!
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Reviewed in the United States on May 27, 2026

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