Product Description
The Holland 4000578 is a genuine SAF-Holland fifth wheel lock replacement kit designed for compatible Simplex Lite rotary-pull fifth wheel assemblies. This kit provides the replacement locking components needed to service worn or damaged fifth wheel locking mechanisms on heavy-duty commercial trucks and tractors.
The fifth wheel lock works with the locking jaw to secure the trailer kingpin during coupling. Over time, normal wear and repeated trailer connections can affect the locking mechanism. Replacing worn components helps restore proper locking operation and dependable trailer coupling.
The 4000578 includes the replacement lock, lock spring, lever bar, cover plate, and retaining pins needed to service the compatible Simplex Lite locking mechanism.
Manufacturer: SAF-Holland
Brand: Holland / Simplex
Part Number: 4000578
Product Type: Fifth Wheel Lock Replacement Kit
Compatible Fifth Wheel Series: Simplex Lite
Release Configuration: Rotary Pull / Left-Hand
Kit Contents:
1 Lock (4109931)
1 Lock Spring (1200706)
1 Lever Bar Pin (4000250)
1 Cover Plate (4100155)
1 Left-Hand Lever Bar (4100372)
1 Cotter Pin (84261)
Quantity: One Complete Lock Replacement Kit
This kit replaces the fifth wheel locking mechanism components only. The locking jaw, eccentric jaw pin, operating rod, fifth wheel top plate, and mounting brackets are not included.
The Simplex Lite series has been discontinued, making replacement components particularly useful for maintaining existing fifth wheel assemblies.
Verify the existing fifth wheel model, release configuration, and part number before ordering. This kit is intended for compatible rotary-pull locking mechanisms and should not be confused with kits used on other Simplex configurations.
Installation should follow SAF-Holland's recommended fifth wheel service and adjustment procedures.
