Trailer Components

Do you offer a safety pin/Where can I find a safety pin?

Demco does not require a safety pin to be used with our couplers, so we do not offer one. You may be able to find a pin that works from one of our distributors. We do offer a lock pin for anti-theft purposes, which is our part number 16244 and is a Trimax brand.

Where can I purchase locally?

Call Demco at 800-543-3626 to find a local distributor.

If I have a metal handle, can I switch over to a composite or vice versa?

At the moment you can’t. We are currently working on making our EZ Latch coupler design interchangeable, so this will be an option in the future.

What coupler repair kit do I need for my specific coupler?

2” repair kits are on page 38 in our catalog, and 2 5/16” repair kits are on page 41.

Do your couplers have any adjustment capabilities?

All couplers are set at the factory, and should not be adjusted in the field unless specified by Demco.

What is the difference between stamped and cast?

In cast couplers, metal is heated past its melting point and molded into the shape of the coupler, while stamping is almost always a cold working process. Visually, stamped couplers will have a more distinct edge to them and a flared edge, while cast are more rounded.

Can I use 2 bolts instead of 4 on your channel mount couplers?

Demco recommends the use of 4 bolts in order to meet the coupler’s full capacity. 2 bolts can be used, but the full G.V.W.R. of the coupler will not be met.

How do I bleed the system?

The first requirement for safe, sure hydraulic braking is the use of quality brake fluid. Use only DOT-3 or DOT-4 brake fluid from a sealed container.

If pressure bleeding equipment is available, follow the manufacturer's instruction in bleeding the system.

If system must be bled manually, proceed as follows: Fill master cylinder with fluid. Install bleeder hose on top bleeder of first caliper to be bled.

NOTE: always bleed brakes by using the top bleed screw on the caliper.

Have loose end of hose submerged in brake fluid in glass container to observe bubbling.

By loosening the top bleeder screw located on the caliper one turn, the system is open to the atmosphere through the passage drilled in the screw. Pump actuator with long steady strokes. The bleeding operation is completed when bubbles no longer rise to he surface of the fluid. Be sure to close bleeder screw securely.

Repeat bleeding operation at each caliper. During the bleeding process, replenish the brake fluid, so the level does not all below the 1/2 full level in the master cylinder reservoir. After bleeding is complete, make sure master cylinder reservoir is filled and filler cap is securely in place.

After the bleeding operation has been completed, apply pressure to the system and check the whole brake system for leaks.

Where can I purchase locally?

Call Demco at 800-543-3626 to find a local distributor.

Does your system have a manual lockout option?

Currently, our DA70 is the only model that does not have a manual lockout option. We offer specific manual lockout kits for each model.

What is the difference between a disc and drum actuator?

Visually, the only difference may be that there is a bypass solenoid on the back side of a disc brake actuator where there is not on a drum brake. Structurally, the only difference is there is an extra valve in the master cylinder on drum brake actuators. This difference adjusts the amount of brake fluid that is released from the master cylinder itself.

If I have disc brakes, can I use a drum brake actuator or vice versa?

You can use a disc brake actuator with drum brakes with a slight braking delay, but you cannot use a drum brake actuator with disc brakes.

What size is the fitting on the back side of the master cylinder?

.125” MPT x .188” Full Flow Inverted Flare.

My brakes are locked on and the emergency lever is in the locked position. How do I disengage them?

If emergency lever of actuator is applied, it can be disengaged by using a flathead screwdriver to lift upward on front of flat emergency lever spring while pulling lever forward until released.

How many mounting holes do I need to use when mounting my actuator?

Different specifications depending on the mounting configuration. Contact Demco for further information.

EZ Latch Coupler

EZ Latch Coupler Composite Handle