PM4-3

Frequently Asked Questions

Q: What are the specifications of the PM4-3 roll pin?
A: The PM4-3 is a roll pin for Palletmaster electric pallet jacks with a nominal diameter of 7/16 inch and overall length of 1-3/8 inch. It is manufactured from medium carbon steel (SAE 1070-1090) hardened to HRC 73.6-77.4 with a black oxide finish.

Q: What is the PM4-3 roll pin used for in electric lift trucks?
A: The PM4-3 is a press-fit roll pin used to secure shaft and axle assemblies in Palletmaster electric pallet jacks. It prevents rotation and axial movement of wheels, steering assemblies, and load wheel components during operation.

Q: Why is the PM4-3 made from medium carbon steel with high hardness?
A: The medium carbon steel composition (SAE 1070-1090) combined with high hardness (HRC 73.6-77.4) provides strength and shear resistance required for press-fit applications under the dynamic loads of electric pallet jack operation. The black oxide finish provides corrosion resistance.

Q: What equipment models is the PM4-3 compatible with?
A: The PM4-3 is designed for Palletmaster electric pallet jacks with 7/16 inch shaft diameters. Confirm your equipment model and shaft bore size before ordering. Do not force fit pins that are oversized or undersized for your application.

Q: Are there cross-reference or superseding part numbers for the PM4-3?
A: The PM4-3 has no known cross-reference or superseding part numbers. It is the correct and primary part for Palletmaster electric pallet jacks requiring a 7/16 inch by 1-3/8 inch roll pin.

Q: How do I know if my PM4-3 roll pin is damaged and needs replacement?
A: Replace the PM4-3 if you observe visible bending, cracking, or breakage, or if the shaft or axle it secures shows movement or rotation. A damaged pin compromises safety and can cause wheel misalignment or loss of steering control.