Rev: 08.09.23 Page 5 CCD-0008113
Troubleshooting
What is happening? What should be done?
Trailer not level. Adjust pin box or hitch accordingly.
Excessive bottoming of skid pad assembly.
Chucking in tow vehicle.
Inspect the rubber compression bumpers to ensure they are
in place. Check trailer brakes for proper operation. If above is
satisfactory, it may be necessary to install a shear spring with
a different spring rate.
Skid pad assembly does not return to
neutral position when disconnected from
tow vehicle.
Check for loose or torn rubber shear spring.
Excessive noise from pin box area. Verify that the pin box is securely attached to the 5th wheel.
If the kingpin is excessively worn, the skid pad will need to
be replaced. Hitch mechanisms can also cause noise. Verify
that unwanted noise is not coming from the hitch. The hitch
manufacturer can provide guidelines for this check.
Maintenance
• Inspect kingpin for excessive wear (annually).
• Inspect the skid pad to ensure a neutral (centered) position. When the trailer is disconnected from the tow
vehicle, an equal gap of approximately 1 - ¼” should be observed between the lip of the skid pad and the
rubber compression bumpers. It is normal to be able to slightly move and twist the skid pad assembly with
hand force.
• Inspect the retainment rods for excessive wear. The retainment rods may show surface scratch marks as an
indication of occasional contact, but the scratches, if present, should be minimal.
• Inspect the plastic glide pads for excessive wear. The glide pad thickness should be no less than ¾”.
• Periodically check the torque values of all bolts.
• Check bearing and grease once per season. If more grease is needed, add it to the bearing assembly. Use
any of the recommended brands in the chart below.
Do not mix lithium, calcium, sodium or barium complex greases. Mixing these incompatible
compounds can create a corrosive and/or toxic chemical with fumes that can result in a serious
health risk if exposed to skin or lungs. When converting from one grease to another, make sure all
old grease is removed completely prior to applying new grease.
Approved Sources - Bearing Grease
Mobil Oil Mobilgrease HP
Exxon/Standard Ronex MP
Kendall Refining Co. Kendall L-427
Ashland Oil Co. Valvoline Val-plex EP Grease
Pennzoil Prod. Co. Premium Wheel Bearing Grease 707L
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