SKU: 21130645158

Ultima | Rear Brake Wheel Cylinder LHS R/L Single Tyre | Dyna BU6# BU100 1985–1999 | JB3158

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Description

Ultima | Rear Brake Wheel Cylinder LHS R/L Single Tyre | Dyna BU6# BU100 1985–1999 | JB3158Ultima Rear Brake Wheel Cylinder LHS R L (JB3158) for Toyota Dyna BU6# & BU100 Single Rear Tyre 19851999 This Ultima Rear Brake Wheel Cylinder (JB3158) is designed as a high quality, direct OE replacement for the Rear Left Hand Side (LHS) of specific Toyota Dyna light truck models equipped with **Single Rear Tyres (SRW)**. This part is the **Rear Lower (R L) or Trailing Shoe** cylinder, which works in tandem with the leading shoe cylinder (JB3156) on

Ultima Rear Brake Wheel Cylinder LHS R/L (JB3158) for Toyota Dyna BU6# & BU100 Single Rear Tyre 1985–1999

This Ultima Rear Brake Wheel Cylinder (JB3158) is designed as a high-quality, direct OE replacement for the Rear Left-Hand Side (LHS) of specific Toyota Dyna light truck models equipped with **Single Rear Tyres (SRW)**. This part is the **Rear/Lower (R/L) or Trailing Shoe** cylinder, which works in tandem with the leading shoe cylinder (JB3156) on the same axle. It fits the Dyna BU6# series (January 1985 to December 1988) and the BU100 series (July 1995 to May 1999). It is crucial to confirm your vehicle uses single rear tyres, as dual-tyre models may require a different part. 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 load.

Features & Benefits:

  • Direct Fit OE Replacement: Designed to match the fit, form, and function of the original equipment wheel cylinder on the LHS Trailing Shoe position.
  • Single Rear Tyre Specific: Correct fitment for Dyna models that are not dual-rear-wheel (DRW).
  • Heavy-Duty Construction: Built for durability and dependable braking performance in light commercial use.
  • 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 Left-Hand Side (LHS), Trailing/Lower Shoe.
  • Complete Unit: Supplied ready to install with pistons, seals, and boots.

Technical Specifications

  • Brand: Ultima
  • Part Number (SKU): JB3158
  • Type: Brake Wheel Cylinder
  • Position: Rear Left-Hand Side (LHS) R/L (Trailing/Lower Shoe)
  • Vehicle Model: Toyota Dyna
  • Series: BU6#, BU100
  • Tyre Configuration: Single Rear Tyres only
  • Years: 1985–1999 (Specific ranges apply per series)
  • Use: Light Truck

Vehicle Fitment Information

Make Model Series Years Position
Toyota Dyna (Single Rear Tyre) BU6# 1985–1988 Rear Left (LHS) R/L
Toyota Dyna (Single Rear Tyre) BU100 1995–1999 Rear Left (LHS) R/L

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Shipping Notes
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Exchange/Return Notes
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SKU: 21130645158

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Lantz Robinson
West Palm Beach, US
★★★★★ 4
It's fine
It has an easy assembly and works as intended. This mower is not for large yards. It will not work for a large yard. If you have a yard larger than 500sqft in total, it will work, but it's not going to get the job done in one shot. Right now, with the grass being long and unruly, it drains both batteries just doing one half of the total yard I have. I'm sure it will last a lot longer when I'm not having to constantly restart from clogging, but the long grass is a challenge for it. It looks decent and it's quieter than a gas. Unfortunately it's a cheap plastic, so it's a little wobbly and struggles to get over bumps. If you're willing to struggle over uneven terrain and cut a bit low in spots, go for it. Otherwise try to mow as flat a surface as possible. Also you can stick a rod to prop open the clipping hatch if you're sick of constantly dumping the thing.
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Reviewed in the United States on May 3, 2026
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Jeff Bezos
Chelsea, US
★★★★★ 5
Exceeded Expectations
I feel like I am about to jinx myself by writing this review after one mow. For background, for the past few years I have been using a Greenworks 21inch deck mower. The batteries were awful on it, it cut awful, it seemed like it would cut out when it sensed I was about to get to the taller bits of grass. It honestly turned me off of buying an electric mower because I felt they were all the same. Que this mower. I read the reviews, figured it was worth a shot and wow I can’t believe I dealt with that Greenworks mower for this long. The LawnMaster mower was easy to put together and there was even juice in the batteries. When I started mowing my front lawn, I was amazed that there was no pieces of grass that it missed, unlike my last mower. The LawnMaster feels very lightweight and I am amble to maneuver it with ease. The size of the deck is perfect since i don’t have a huge yard, and it’s very quiet. So I’m suspiciously optimistic and if it continues to impress me, you better believe I’ll be buying a trimmer from LawnMaster too.
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Reviewed in the United States on April 19, 2026
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Verified Purchase
Janice O
Fort Morgan, US
★★★★★ 5
I am pleased with mower. Easy to put together and handle
I have used this mower twice and so far am very pleased. It is light weight and will mow my small front and back yard with leaving 40% left on battery. I did have a scare last time I used because mower stopped on fully charged batteries and I discovered the safety key came loose and was able to put back in and finish. In my opinion the key could fit a bit more snug
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Reviewed in the United States on May 11, 2026
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Surfer23451
Bozeman, US
★★★★★ 5
So far, so good!
I received the mower quickly and on time. It was in great shape coming out of the box, and the minor assembly required was easy and well spelled out. I fully charged the batteries before trying out the mower. Setting to deck level 3, I was able to cut my back yard easily and completely which took me about 30-35 minutes. There was still significant charge in the batteries. For a small to medium yard, as in my case cutting the front one week and the back the next, this mower works great!
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Reviewed in the United States on May 4, 2026
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gg23
Dallas, US
★★★★★ 3
Nice, but not heavy duty
Nice and lightweight. Very simple to put together. ok for small yard. Mostly all plastic . Works fine out of the box ,but I don't expect it to last. Small blades. Not good for tough weeds.
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Reviewed in the United States on May 23, 2026

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