Product Description
CUP, BEARING
Frequently Asked Questions
Q: What is the bearing cup 00591-01456-81 and where is it located?
A: This bearing cup is the stationary outer race in a tapered roller bearing assembly used in Toyota lift truck load wheels or mast support bearings. It houses the rollers and transmits radial and axial loads to the truck frame. Location varies by model; consult the assembly diagram for your specific equipment.
Q: What are the dimensions and weight specifications for this bearing cup?
A: Exact bore diameter, width, and material composition depend on the specific bearing set this cup pairs with. Verify the cup bore and outside diameter match your equipment before ordering. Mounting surface finish and tolerances are critical for proper bearing preload and operation. Contact our parts team with your truck model for specifications.
Q: When should this bearing cup be replaced?
A: Replace the bearing cup if the load wheel or mast assembly exhibits grinding noise, radial play, or uneven wear on the tire or wheel surface. If spalling or pitting is visible on the inner race surface, replace both the cup and cone assembly as a matched set. Do not reuse a bearing cup with a new cone.
Q: How is this bearing cup installed?
A: The bearing cup is typically press-fit or friction-fit into the truck frame or wheel hub. Removal requires a bearing puller or arbor press to avoid damage. Installation requires controlled pressure to seat the cup to the proper depth. Measure cup thickness and verify it is flush or to specification after installation before reassembling the load wheel.
Q: What is the service life of this bearing cup?
A: Under normal duty, a bearing cup lasts 2000 to 4000 operating hours. High-load operations, wet environments, and contamination reduce life significantly. Inspect for corrosion and spalling every 500 hours. Proper wheel alignment, load distribution, and regular greasing extend bearing cup life. Replace as needed; do not attempt repair.