Product Description
Caster wheel assembly, polyurethane tread, Durarun 95A hardness, designed for Caterpillar electric lift trucks. Supplied as CT 971761 OEM replacement. Compatible with assemblies requiring CT 971761-SG string guard variant. Intended for chassis support and mobility.
Specifications
Material
| Wheel Hardness | 95A Shore durometer |
| Tread Material | Polyurethane |
Part Numbers
| Manufacturer Part Number | CT 971761 |
| OEM Part Number | CT 971761 |
| Cross-Reference Part Numbers | CT 971761-SG |
| Alternate Part Numbers | 95A Poly Caster Wheel Assembly |
Frequently Asked Questions
Q: What is the difference between a caster wheel and a load wheel?
A: The 971761 is a caster wheel assembly designed for chassis support and mobility, not load bearing. Caster wheels are typically smaller diameter than load wheels and allow equipment to pivot and maneuver. The 971761 supports the frame weight of the electric lift truck and enables directional control, while load wheels support the lifted load itself. They are not interchangeable.
Q: What equipment is the 971761 designed to fit?
A: The 971761 is a Caterpillar caster wheel assembly for electric lift trucks and pallet jacks. It is also available as variant 971761-SG, which includes a string guard for added protection in environments with cord or rope hazards. Confirm your specific equipment model and caster location before ordering, as caster bore and mounting specifications vary by equipment type and model year.
Q: What does the 95A Durarun polyurethane compound provide?
A: The 971761 uses a 95A Shore durometer Durarun polyurethane formulation, a proprietary Caterpillar blend engineered for caster wheel duty. Durarun provides smooth, quiet operation and good abrasion resistance in warehouse environments. The 95A hardness is optimized for low rolling resistance during maneuvering, reducing battery drain on electric equipment compared to softer or harder materials.
Q: What is the 971761-SG variant, and when should I use it?
A: The 971761-SG is a string guard variant of the standard 971761. The string guard is a protective ring that prevents cords, rope, or film from tangling around the caster wheel during operation. Use the -SG version if your equipment operates in environments where flexible materials or debris are present. Both variants use the same Durarun polyurethane compound and are otherwise identical.
Q: How long does the 971761 typically last in service?
A: Caster wheels typically outlast load wheels because they carry only frame weight, not lifted loads. The 971761 should deliver 4-7 years of service in typical warehouse duty before the polyurethane tread becomes noticeably worn. However, caster swivel wear may occur before wheel tread wear, depending on equipment usage intensity and pivot frequency. Replace when the caster becomes stiff, noisy, or fails to pivot smoothly.
Q: How should the 971761 be stored when not in use?
A: Store caster wheels in a clean, dry location away from direct sunlight and extreme heat, which can degrade polyurethane over time. Keep away from oils, fuels, and solvents that may compromise wheel integrity. If stored for extended periods (months or longer), inspect quarterly for cracking, hardening, or other degradation before reinstalling on equipment.
Q: What maintenance does the 971761 require?
A: Inspect caster wheels quarterly for dirt, debris, or rope wrapping around the axle or swivel. Clean gently with damp cloth and mild detergent; do not use harsh solvents or high-pressure washers on the polyurethane. If the caster becomes stiff or resistant to pivot, it may require lubrication at the swivel joint (follow your equipment manual for approved lubrication points and schedule). Listen for grinding noise, which indicates internal swivel bearing wear and signals replacement is needed.
