Jost
Lubricate the kingpin lock using a hand pump grease gun through the grease zerk on the skirt of the fifth wheel; see Fig.. Apply a light oil to all moving parts. For sliding fifth wheels spray diesel fuel on the slide path of the base plate. Lubricate the Slide Release Arm center pivot bushing using Lithium based EP rated grease. The zerk is located under the slide bracket.
Notice: Do not use a power grease gun. The pressure will damage the lube line.
If the fifth wheel is not equipped with low-lube plates, apply a lithium-based grease with extreme pressure (EP) additive to the trailer contact surface of the fifth wheel.
Note: If the fifth wheel is equipped with low-lube plates, the top plate only requires lubrication at the new product break-in stage. The low-lube plates require no further lubrication.
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Jam Nut
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Adjustment Bolt
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Grease Zerk