Fontaine

cen mm 31.02.000

  1. Tilt the top plate forward (the front of the fifth wheel is down) and apply grease to each bearing area through the zerk fittings located on each side of the top plate just to the front of the bracket pins. Continue to apply grease until it is coming out of the back of the bearing. It may be necessary to raise the rear of the fifth wheel with a pry bar to open up the pocket slightly and allow the grease to flow through. A substantial amount of grease may be required initially to fill the reservoir.
    Tilt the fifth wheel ramps down (the rear of the fifth wheel is down) and repeat the greasing procedure. Rock the top plate back and forth several times to spread the grease over the bearing surface.
  2. Inspect the trailer kingpin plate and top surface of the fifth wheel to make sure each is properly greased. A liberal coating of grease should be applied to the complete surfaces of both the trailer kingpin plate and the top surface of the fifth wheel.

    3. Note: Do not use a lube plate (high density polyethylene) on top of the fifth wheel or on the kingpin instead of grease without prior approval by Fontaine Fifth Wheel. The additional thickness of this material can prevent the proper operation of the fifth wheel and may cause a dangerous condition.

    Note: Fontaine suggests the use of a Moly based lubricant such as Mobilgrease XHP 320 or equivalent when applying lubricant to the locking jaw and wedge.

  3. Lubricate the fifth wheel prior to opening and closing it. Separate the jaw and wedge with a screwdriver, and grease the full length of their mating surfaces. Lubricate the top and bottom contact surfaces of the jaw and wedge. See Fig.. Open and close the fifth wheel several times to further distribute the grease.

    Note: 6000 Series shown; 7000 Series fifth wheels use similar parts.

    1. Wedge Stop Rod Nut

    2. Flat Washer, 5/8"

    3. Wedge Stop Rod Spring

    4. Wedge Stop Rod

    5. Grease Fitting

    6. Bracket Pin

    7. Bracket Retainer Pin

    8. Cotter Pin, 3/16" x 1"

    9. Bumper Spring

    10. Handle Spring

    11. Bolt, Secondary Safety Lock

    12. Flat Washer

    13. Secondary Safety Lock

    14. Bushing, Secondary Safety Lock

    15. Hex Locknut

    16. Pull Handle

    17. Bolt, Bumper

    18. Bushing

    19. Bumper

    20. Timer Spring

    21. Timer

    22. Operating Handle

    23. Bolt, Operating Handle

    24. Bushing, Operating Handle

    25. Hair Pin Cotter

    26. Wedge

    27. Step Jaw

    Fig. 1, Fontaine Fifth Wheel

    Lightly oil other moving parts in the fifth wheel.
  4. Apply grease to the top plate. Spread grease all over the mating surface of the top plate. Be sure the grease pockets built into the top plates are full of grease.
Note:
Parent topic: Lubrication Fifth Wheel
Document Number: 0000122013
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-06-04