Tie Down Drum Brake Kit for Electric Brakes User Manual

Electric drum brake installation

ELECTRIC DRUM BRAKE INSTALLATION

Position the trailer on a stable and LEVEL working surface. If possible, leave the tow vehicle hooked to the trailer
in order to limit movement as well as keeping the front end supported and level. If the trailer is not supported on
the tow vehicle, it MUST be blocked directly to the ground at the frame/tongue junction.

UNDER NO CIRCUMSTANCES IS THE TRAILER TO BE SUPPORTED BY THE TONGUE JACK WHILE BEING
RAISED AT THE WHEELS! Block the wheels opposite the side being worked on both front and rear so that the
trailer cannot roll.

NOTE: Using an adequate capacity floor or scissors jack, raise the side of the trailer. NOTE: Check under frames
for brake wires BEFORE lifting. DO NOT position jack in areas that may damage brake wires, etc.

NOTE: A. Tandem and tri-axle trailers should be jacked on the frame between the wheels, or directly under the
axle within 8” of the backside of the tire. B. Single axle trailers can be lifted on the frame just behind the axle or
directly under the axle within 8” of the backside of the tire (if lifting at the axle).

CAUTION- always support the trailer with adequate capacity support stands. DO NOT rely on the jack as the
only means of support.

1. Check Brake Mounting Flange
To mount brakes to an axle, the axle must have brake flange welded to the axle. Tie Down’s 10” drum brakes fit
standard 4 hole brake flanges and mount with 7/16” grade 5 or better bolts and lock nuts or lock washers. Our
12” drum brakes fit standard 5 hole brake flanges and mount with 3/8” grade 5 or better bolts and lock nuts or
lock washers. The brake flange connected to the axle must be square and concentric with the axle spindle. If the
brake flange is not properly installed, it will contribute to rapid lining wear and improper brake action. If your axle
does not have flanges pre-welded to the axle, see a qualified technician to weld the plates to your axles. Improper
welding can weaken the axle causing severe problems.

2. Brakes Installation
Brakes are marked as "RIGHT" (RH) and "LEFT" (LH). The "LEFT" brake travels on the driver's side of the trailer.
Place the brake against brake flange with the adjustor wheel at the bottom. Secure with four 7/16” (grade 5) hex
head bolts for the 10” brakes or five 3/8” (grade 5) hex head bolts for the 12” brakes. Use lock washers or lock
nuts w/flat washers on the back side of the flange. Torque to 30 ft. lbs.

3. Installing Brake Drum
After the brakes have been correctly assembled to the brake flanges, TAKE NOTE which direction the spoon
needs to be moved in order to open the star wheel, mount the brake drum to the spindle. If re-using drum and
bearings, check for wear or pitting in the bearings and cup surfaces. Check drum for surface ware. Replace any
parts that show wear. Pack the inside bearing with suitable wheel bearing grease. Force grease through and
around the rollers. Place the bearing in the hub and install the grease seal flush with the end of the hub using an
arbor press or soft mallet. The bearing seal should be lubricated before putting it on the brake drum. Remove
excess grease.

Instruction #08084