Product Description
Load Wheel
Frequently Asked Questions
Q: What is the load capacity of the SU S640 load wheel?
A: The SU S640 is rated for 3500 lbs per wheel in a dual-wheel configuration, delivering 7000 lbs total capacity for a two-wheel assembly. Do not exceed this rating as it will damage both the wheel polyurethane and the bearing seals.
Q: Can the SU S640 replace older Yale and Hyster polyurethane wheels?
A: The SU S640 is compatible with Yale GLC070-100 and select Hyster E50-E80 models if the axle bore is 1.875 inches and the mounting pattern is 4-bolt. Verify the bore size with calipers before ordering. Some serial ranges require adapter sleeves.
Q: What diameter and width is the SU S640 load wheel?
A: The SU S640 is a 6-inch diameter, 2.5-inch width polyurethane wheel. These dimensions make it suitable for narrow-aisle warehouse environments. Do not force this wheel onto different bore sizes as this will cause cracks and bearing misalignment.
Q: What maintenance schedule should I follow for the SU S640 wheel?
A: Inspect the SU S640 every 300 operating hours for wear, polyurethane loss, and bearing noise. Sealed bearings do not require greasing. The wheel typically lasts 3-4 years with indoor warehouse use. Replace when visible cracking appears or when the wheel becomes difficult to spin by hand.
Q: What symptoms indicate the SU S640 wheel is failing and needs replacement?
A: Replace the SU S640 if you observe flat spots, audible grinding from the bearing, polyurethane chunks separating from the hub, or if the truck pulls to one side during travel. These indicate imminent bearing seizure or wheel failure that will damage the axle bracket if not addressed.