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 thick-
ness of this material can prevent the proper op-
eration of the fifth wheel and may cause a dan-
gerous condition.
3.
Lubricate the fifth wheel prior to opening and
closing. Grease the jaw and wedge with a screw-
driver and distribute the grease along the full
length of the jaw and wedge mating surfaces.
See
. Open and close the fifth wheel sev-
eral 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 inter-
face 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 mount-
ing bracket supports through the zerk fittings.
See
2.
Using a light oil or diesel oil, lubricate the cam
track and pivot. See
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 ter-
minals and create bridging between positive and
ground terminals.
NOTE: The use of soap is not recommended for
cleaning the electrical connector, as some
soaps may increase the corrosion process.
1.
Wash out any existing grease, dirt, and corrosion
on the trailer connectors with electrical contact
cleaner spray.
f310884
1
2
2
3
3
04/11/2011
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 Components
31
Business Class M2 Maintenance Manual, March 2016
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