Meritor Axles

Hold a pressure gun on each fitting until fresh grease appears. See Fig.. This will ensure that all of the old contaminated grease has been forced out. It is not necessary to exceed 4000 psi (27 560 kPa). The best distribution of new lubricant and the best purging of old lubricant occurs when about 4000 psi (27 560 kPa) pressure is applied at the grease gun nozzle. Using a 40 to 1 booster, the air should be limited to 100 psi (689 kPa); using a 50 to 1 booster, the air should be limited to 80 psi (551 kPa). Higher or lower pressures are not recommended.

When lubricating Meritor knuckle pin bushings for Initial Maintenance, raise the front axle until the front tires are off of the ground. Wipe the lube fittings clean, and slowly feed multipurpose chassis grease (NLGI grade 1 or 2) into each bushing area while turning the wheels from extreme right to left and back again (lock-to-lock). This will eliminate small air pockets and improve grease distribution.

Lower the front axle so that the tires are on the ground, and regrease both top and bottom bushings until new grease is seen at the seal on the bushing opposite the fittings.

When lubricating knuckle pin bushings at M1 through M3, do not raise the front axle. Wipe the lube fittings clean, and apply multipurpose chassis grease until new grease is seen at the grease seal on the bushing opposite the fittings.