Interval from new

A) After first 500 miles (800 km)

B) Every 5,000 miles (8000 km) thereafter.

This must be carried out by a qualified person familiar with current trailer braking systems.
Raise the trailer onto a pair of axle stands at each end, carefully avoiding damage to electrical wiring and other components under the trailer. Remove all the road wheels.

Stage A - brake shoes
Adjust the shoes on each brake to the lock-up point by turning the adjuster ‘nut’ on the brake back plate (using a cranked, 17mm ring spanner) The adjuster should then be released gradually while at the same time rotating the brake drum wheel to achieve a free turning brake.

PLEASE NOTE
i)Slight contact of the shoe/drum is permissible; too much freeing-off of the shoes will result in poorly adjusted brakes.
ii) Rotate wheel in forward direction only during adjustment procedure.

Stage B - brake rod
1) Adjust the self-locking nut at the rear of the long central brake rod until slackness is taken up, to leave 1 mm of free play at the nut.

IMPORTANT:Care must be taken with this adjustment to avoid over tensioning the system which would cause the brakes to bind - this can be checked by rotating each wheel individually during the adjustment of the main central brake rod nut.

2) At this stage, the handbrake will have been automatically adjusted.

WARNING:
An over-adjusted brake system can lead to severe heat generation and failure of wheel bearings.

Stage C - final checks
1) Replace road wheels, ensuring that the wheel nuts are tightened to 65 lbft (90 nm).
2) Road test trailer to ensure safe and proper operation of the trailer brakes.
3) Should any aspect of the above procedure be unsatisfactory, please contact Brian James Trailers for advice.