Product Description
Washer
Frequently Asked Questions
Q: What is the 138458 washer used for in forklifts?
A: The 138458 is a flat washer used in hydraulic cylinders, pump assemblies, and load-bearing fastener applications on Crown, Toyota, Hyster, and Raymond forklifts. It distributes load and prevents fastener heads from damaging softer components during assembly and vibration.
Q: What material and dimensions characterize the 138458?
A: The 138458 is a steel flat washer with a zinc or cadmium plating for corrosion resistance. Exact inside diameter, outside diameter, and thickness must match your fastener size. Verify hole clearance on your cylinder or assembly before ordering to ensure proper fit.
Q: Can the 138458 washer be reused or must it be replaced?
A: Washers should be replaced during major assembly work to prevent stress concentration and uneven load distribution. Reusing old washers that are bent, cracked, or corroded can cause fastener loosening, seal leaks, and component misalignment. Cost of new washers is negligible compared to downtime risk.
Q: How does washer thickness affect cylinder performance?
A: Incorrect washer thickness can create gaps between components that reduce fastener clamping force, increase vibration, and allow seal leaks. Under-thickness washers concentrate pressure and may dent softer metals. Always use washers matching original equipment specifications.
Q: Is the 138458 washer compatible with all hydraulic fluids?
A: The 138458 steel washer with standard plating is compatible with ISO 46 hydraulic oils, biodegradable fluids, and most petroleum-based fluids. The zinc or cadmium coating resists fluid breakdown over extended service periods. No fluid-specific replacement is necessary.