7/8″ Hydraulic Trailer Master Cylinder – 313007

SKU: 313007 Category:


3 in stock

3 in stock

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7/8″ Hydraulic Trailer Master Cylinder

Hydraulic trailer master cylinder, 7/8 inch to suit 2000kg override couplings towing tandem axle trailers. Best suited to 14-inch, 15-inch and 16-inch wheels.

Bleed and adjusted brakes are the key to an efficient hydraulic braking system. Once the brakes bleed, tighten the nut on the back of the brake lever.

A zinc bracket is required brake for hydraulic braking systems.

  1. Fit the master cylinder bracket on the rear bolt mounts
  2. Bolt hole mounts are 54mm between centres
  3. Select 1/2-inch bolts that bolt right through your bracket, coupling and drawbar
  4. Disconnect the parking brake
  5. Adjust the lower nut 2mm from the back of the override, then lock it off.

Further, we have more information 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, and the silicone in DOT 5 makes the seals swell and can bind up caliper pistons.

Purchase spare parts and other trailer parts here

Additional information

Weight1 kg
Dimensions20 × 12 × 8 cm


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