Landoll Axle Trailer 440-53

Chock wheels to prevent vehicle from rolling. Release spring and service brake. Air chamber push rod must be fully released.

Maintain a fully released parking brake, a minimum of 105 psi reservoir pressure must be maintained. If air pressure is not available the spring brake must be manually caged.

Remove the existing slack adjuster and clevis - DO NOT REMOVE EXISTING JAM NUT.

Install the new clevis (with 1/2” pin) onto the push rod up to the jam nut -DO NOT TIGHTEN JAM NUT.

Fit the installation guide over the cam splines so the 1/2” pin slots face the air chamber.

Swing the guide into the clevis until the appropriate slot totally engages 1/2” pin.

Observe the guide pointer arrow: If the guide pointer is above the clevis pointer, adjust clevis CCW for alignment. If the guide pointer is below the clevis pointer, adjust clevis CW for alignment.

Reposition clevis until the guide pointer aligns with the clevis pointer.

Verify by engaging 1/4” pin through the clevis and guide.

See Table 4-1 for recommended lubricant.

See Table 4-1 for recommended lubricant.

See Table 4-1 for recommended lubricant.

Hoses inspected and replaced as needed

1 Monthly / 2000 Miles Axle Trailer Maintenance

See Table 2-1 and Table 2-2 for correct torque specifications.

See Table 4-1 for recommended lubricant.

Wash semitrailer to remove all accumulated dirt and grime

Use any mineral spirits paint thinner (or its equivalent) to remove grease and oil from all parts of the trailer. Rinse degreasing solution off with cold water

WARNING: Paint thinner and other solvents are flammable and toxic to eyes, skin, and respiratory tract. Avoid skin and eye contact. Good general ventilation is normally adequate. Keep away from open flames or other combustible items.

Inspect semitrailer for cause of any reported troubles

Scrape, sand, prime, and repaint areas where finish is missing or where there is evidence of corrosion

Sign off on the axle trailer cleaning

Check for faulty units. Check the condensation holes on the underside of the brake chambers to make sure they are open. The spring brake has two brake chambers, a service chamber and an emergency chamber or spring chamber. Service brake chambers should be disassembled and cleaned per interval described in Table 4-2.

The diaphragm and any marginal parts should be replaced. When replacing the service diaphragm, replace the corresponding parts for the other chamber on the same axle (to aid in even brake application and release). Examine yoke pin for wear and replace as necessary. The spring chamber should not be serviced.

Replace entire unit (both service and spring chamber) if spring chamber becomes faulty.

WARNING: The spring brake chamber employs a spring with high forces. Service should not be attempted. Serious injury or death may result.;