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.
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.
3. Lubricate the fifth wheel prior to opening and
closing. Grease the jaw and wedge with a
screwdriver and distribute the grease along the
full length of the jaw and wedge mating surfaces.
See
Fig. 5. Open and close the fifth wheel
several times to further distribute the grease.
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.
ConMet Simplex
Apply a heavy coat of grease to the top plate, either
through the grease fittings located on the underside
of the top plate, or by direct application.
Apply grease directly to the lock mechanism.
If lubrication fittings are present, lubricate the
interface of the steel bracket shoe and bracket
trunnion.
Holland
1. Using a water-resistant lithium-base grease,
apply grease to the top plate. Grease the
mounting bracket supports through the zerk
fittings. See
Fig. 6.
2. Using a light oil or diesel oil, lubricate the cam
track and pivot. See
Fig. 7.
31–04 Trailer Electrical
Connector Lubricating
In some cases, failure of trailer cables occurs due to
intrusion of chloride-based road deicing chemicals
into the trailer connector. Once inside the connector,
the chloride-based chemicals corrode the brass
terminals and create bridging between positive and
ground terminals.
1. Pull Handle
2. Jaw
3. Wedge
Fig. 5, Fontaine Fifth Wheel
09/06/2001
f310886
A
1
A. Apply grease to the top plate.
1. Zerk Fitting
Fig. 6, Holland Fifth Wheel
Frame and Frame Components31
Business Class M2 Plus Maintenance Manual, 02/10/202331/4
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