Landoll Axle Trailer 455-50'

Wiring and connections inspection

Brake adjustment and wear inspection

Brake adjustment and wear tightening/adjustment torque

Remove dust cap from spring brake chamber

Remove the release bolt from its holding brackets and insert it into the spring brake chamber

DO NOT USE AN IMPACT WRENCH TO CAGE THE SPRING BRAKE

Turn the bolt until the spring brake is caged. This should be 2-1/4 to 2-1/2 inches of release bolt extension

The brakes should now be totally released

Do not operate loaded trailer with brake manually released

To reset the spring brake, turn the release bolt until the spring is released. Remove the release bolt and store it in its brackets

Snap the dust cap back in place on the chamber

Service air cleaner element and element wrapper

Perform more often when running under severe operating conditions.

Service crankcase oil (all engines w/o filter)

Perform more often when running under severe operating conditions.

Change crankcase oil (standard base w/ filter)

Required for initial break-in only. Perform more often when running under severe operating conditions. (100 Hourly)

Change crankcase oil (high capacity base w/ filter)

Required for initial break-in only. Perform more often when running under severe operating conditions. (100 Hourly)

Block wheels to prevent vehicle from rolling

Check that the push rod is fully retracted, apply air to release spring brake

Turn adjustment hex counterclockwise to create an excessive clearance condition

Make a full service brake application. On release, allow sufficient time for brake to fully retract

The push rod stroke should be 1-1/2” to 2\ with a 100 to 105 PSI service brake application"

Measure the movement of the push rod from the completely released position to the applied position by marking the push rod where it exits the air chamber before and after application

If the brakes have been running tight, the control arm location should be checked

WARNING: If the adjuster appears not to be operating, check the other brake components for proper function and eliminate any binding. Recheck the automatic slack adjuster. If the adjuster is not functioning, the unit must be replaced because failure of proper adjustment function will result in loss of brakes.

Sign off on the operational check

Warning: This maintenance check requires trained personnel with PPE!

Check the oil level of the tractor wet kit or hydraulic engine power hydraulic tank

Check the hydraulic oil level with hydraulic cylinders in the retracted position and the hydraulic pump disengaged.

Enough volume in tank (approximately 15 gallons) above hydraulic oil level must be available to accept extra oil from cylinders when retracted.

Overfilling can cause hydraulic fluid overflow during operation.

Dock leveler flow bypass regulator must provide 2.5 to 3.0 gallon per minute to dock leveler valve for Single Pair Dock Leveler (62,000 lb.)

Dock leveler flow bypass regulator must provide 6.0 gallon per minute to dock leveler valve for Double Pair Dock Leveler (124,000 lb.)

Hydraulic system pressure relief valves should be set at 2500 psi.

Sign off on the hydraulic system maintenance