Hofmann FPA12144, Instruction Manual

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8.12 APPROACH RAMPS, CHOCKS, FRONT WHEEL STOPS
Inspect for excessive wear or damage. Repair or replace if required.
Inspect hinge pins. Replace if excessively worn. Lubricate if in good condition
8.13 FRONT AND REAR STEER PLATES
8.13.1 VISUAL INSPECTION
Check front turn tables and rear slip plates for unusual deflection, damage, fluid spills. Clean
or further inspect if needed.
8.13.2 CLEAN REAR SLIP PLATES AND FRONT TURN TABLES
Clean foreign debris from front turn tables and rear slip plates by blowing out with
compressed air.
Check and clean steer plates. Lubricate with oil or light grease.
8.13.3 MAINTENANCE OF REAR STEER PLATES
Inspect the non ‐ skid coating on rear slip plates for wear. All areas found to be worn smooth
should be resurfaced with an Anti ‐ Slip abrasive floor tread tape or a heavy duty Anti ‐ Slip Floor
Coating.
Remove rear slip plate covers. Clean runway surface and touch up any paint wear with a rust
resistant paint. Allow paint to dry thoroughly. Inspect transfer balls for excessive wear,
deformations or corrosion. Inspect plastic pads (pucks) for excessive wear or deformation.
Replace if needed.
8.13.4 MAINTENANCE OF REAR STEER PLATES ‐ IF EQUIPPED WITH
PLASTIC BEARING CAGE.
Remove top Slip Plate covers by first removing the four (4) shoulder bolts on each cover.
Remove polyethylene ‐ bearing cages insuring that all the Delrin bearings remain in the cages.
Additional Delrin bearings may be purchased if required.
Clean runway surface and touch up any paint wear with a rust resistant paint. Allow paint to
dry thoroughly.
To obtain optimum performance, the position of the slip ‐ plate bearing cage should be rotated
every quarter to change the wear pattern.
With the first quarter maintenance, flip the bearing cage over to the opposite side.
With the second quarter maintenance, rotate the bearing cage end ‐ to ‐ end.
With the third quarter maintenance, flip bearing cage over to the opposite side.
Fourth quarter maintenance should see the bearing cage rotated back to the original
position.
Quarterly maintenance will optimize performance and contribute to longer slip plate life.
8.13.5 ANTI ‐ SKID COATING ON REAR STEER PLATES
Inspect the non ‐ skid coating on rear steer plates for wear. All areas found to be worn smooth
should be resurfaced with an Anti ‐ Slip abrasive floor tread tape or a heavy duty Anti ‐ Slip Floor
Coating.