Price
$25.00 Inc.GST
6 in stock
6 in stock
- Bore Size: 3/4 Inch
- Wheel Compatibility: Best suited for 14, 15 and 16-inch wheels
- NOT INCLUDED, REQUIRED: Hydraulic cylinder park brake
Shipping
3/4-inch Hydraulic Trailer Master Cylinder
This 3/4-inch Hydraulic trailer master cylinder suits 1450kg override couplings that tow single axle trailers. 3/4-inch refers to the piston bore size.
In terms of compatible wheel sizes, this master cylinder is best suited for 14, 15 and 16-inch wheels.
A hydraulic cylinder park brake is required (and not included) for hydraulic braking systems. You can purchase one here.
Installation Instructions
- Fit the master cylinder bracket on the rear bolt mounts
- Bolt hole mounts are 54mm between centres
- Select 1/2-inch bolts that bolt right through your bracket, coupling and drawbar
- Disconnect the parking brake
- Adjust the lower nut 2mm from the back of the override, then lock it off.
Please Note: Bled and adjusted brakes are the key to an efficient hydraulic braking system. Once the brakes are bled, tighten the nut on the back of the brake lever.
Fitting Advice from Our Engineer
- You must have at least 2mm free play, between 2mm and 5mm, when the hydraulic brake pads start to wear
- If there is no free play, as soon as the brakes start to work and get a little warm, you will begin to get brake build-up, increasing heat and burning out your brakes or even popping the seals in the master cylinder
What type of brake fluid should I use?
DOT 3 or DOT 4 should be used in your boat trailer. This type of hydraulic oil does not absorb water, but the silicone in DOT 5 can cause seals to swell and bind up caliper pistons.
Why this Master Cylinder is an Essential Component
The 3/4-inch trailer master cylinder is the crucial braking component used on single-axle braked trailers with two-wheel cylinders.
You’ll also buy various braking system components, such as 9-inch hydraulic brake shoes, hydraulic drum brakes, and electric brake parts.
Other Hydraulic Master Cylinders and Replacement Parts
- 3/4-inch Replacement Hydraulic Cylinder – 313001
- 7/8″ Hydraulic Trailer Master Cylinder – 313007
- 3/4-inch Replacement Hydraulic Cylinder Cap
- 7/8-inch Hydraulic Cylinder Cap
- Hydrastar Hydraulic Cylinder Cap
- Hydraulic Master Cylinder Park Brake – 610949
- Hydraulic Brake Hose Stainless Braided – CTA-061228
- 3 Way x 3/8 UNF Brass Hydraulic Hose Fitting
- 4 Way x 3/8 UNF Brass Hydraulic Hose Fitting
- 3/8-inch Hydraulic Brass Adaptor
- 3/8-inch Hydraulic Brass Caliper Elbow
- 9-inch Hydraulic Wheel Cylinder
There are no FAQs for this product.
Additional information
| Weight | 1 kg |
|---|---|
| Dimensions | 20 × 12 × 8 cm |
Our Service Lifetime Warranty
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.
Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.
Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.
60-Day Returns
After 60 years of experience, we know that life has its unpredictable moments.
All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.
You can view our full policy for change-of-mind returns here.










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