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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Amazon Customer
Boise, US
★★★★★ 5
The color is beautiful
Size: 17 Inch, Color: Dark Blue
These are beautiful! I bought them for my Grandsons Baseball room. We haven’t put them up yet. They will be a great addition to his red, white, and blue baseball room!
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Reviewed in the United States on May 18, 2026
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Miah
Lexington, US
★★★★★ 5
Solid Floating Shelves 🛠️🏠
Color: Black, Number Of Shelves: 4, Size: 15.7in
I have installed four sets of the black floating shelves in my office. They are made of high quality materials, featuring a sophisticated black woodgrain finish with a natural texture. Supposedly, each unit can handle up to 22 pounds, though I would not recommend testing that limit with your vintage bowling ball collection if you value your flooring. They are awesome. The value is good for a set of two. Each shelf measures 22x7x1 (56x17x3 cm) inches, providing a decent amount of storage for books or decor. The installation was straightforward since the hardware for multiple wall types was included. They work well in the kitchen for spices or in the bedroom for personal belongings. One tip for a secure fit: use a level during installation and make sure the bracket is flush against the wall before sliding the shelf on, or your photos might look like they are sliding off a mountain 📐 These shelves offer a clean, modern look and stay stable once mounted correctly. They are a practical choice for adding functional display space to any room 🖼️
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Reviewed in the United States on May 4, 2026
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Tyler Kline
Grantham, US
★★★★★ 5
Good looking shelves and easy install - skip the included drywall anchors
Color: Black, Number Of Shelves: 2, Size: 22in
I installed these shelves in a bedroom to get things off my dresser and some decor. Once mounted they look really nice. The black finish looks clean and modern and they blend in well with the room. Installation was pretty straightforward. The metal bracket mounts to the wall first and then the shelf slides over the bracket. As long as you take your time lining things up it’s a simple project. One thing I strongly recommend is not using the white plastic self-drilling drywall anchors that come with the kit. I’ve used that style before on other projects and they tend to strip out easily and leave larger holes in drywall. I used better anchors instead and the shelves mounted much more securely. The rest of the hardware worked fine and once installed the shelves feel solid and hold items well. Pros - Clean modern look - Easy installation - Feels solid once mounted - Good size for books or decor Cons - The small level included isn’t very accurate — use your own level - One of the metal brackets was slightly bent out of the box but straightened out easily Helpful tip: Use your own level and better drywall anchors if you have them. It makes installation easier and the shelves will mount much more securely. Final thoughts: For the price these are nice looking floating shelves that install easily and work well for light storage and decor.
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Reviewed in the United States on March 13, 2026
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Coffman, H
Alexandria, US
★★★★★ 5
Cheap, and effective!
Color: Black, Number Of Shelves: 4, Size: 15.7in
Looks good, works great, low cost. I'll be purchasing more in the future.
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Reviewed in the United States on May 12, 2026
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Amazon Customer
Carnegie, US
★★★★★ 4
Cute for coffee bar!
Color: Black, Number Of Shelves: 4, Size: 15.7in
Great for above my coffee bar. Easy to mount and align. Seems stable!
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Reviewed in the United States on April 14, 2026

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