Replacement fan belt designed as a directfit spare for select Holland T8 tractor models. Exact replacement for OEM part numbers 84257945 and 87705866. Key benefits Direct fit for listed models, eliminating the need for belt modification or custom routing. Restores reliable drive of the engine cooling fan and accessory pulleys to help maintain normal engine operation. Durable construction engineered to resist heat and wear for longer service life under heavy agricultural use. Consistent belt tension and stable tracking to reduce slippage and limit downtime during field work. Simple swapin installation when following the tractor service manual, allowing faster maintenance and to service. Important attributes Function: transfers engine power to the cooling fan and related accessory pulleys as a fan belt replacement. Compatibility: fits Holland Tractor T8.275, T8.300, T8.330, T8.380, T8.410, T8.420, and T8.435. Part numbers: matches OEM numbers 84257945 and 87705866 for accurate replacement. Fit and dimensions: manufactured to match OEM dimensions and pulley profile for proper alignment and tension. Performance: designed for consistent power transmission, reduced slippage, and resistance to typical workshop and field operating conditions. Practical use scenarios Preventive maintenance: the belt during seasonal service to avoid unexpected failures during planting or harvest. Onsite : carry as a spare for quick replacement after belt wear or damage while working in remote fields. Engine servicing: use as the correct replacement part when rebuilding or reconditioning the front accessory drive on the listed T8 models. Installation and care with the engine off and cooled, following the tractor service manual for proper routing and tension adjustment. Inspect pulleys and tensioners for wear when changing the belt to ensure performance and service life. Store in a cool, dry place away from direct sunlight and solvents to preserve belt integrity until installation. This fan belt is supplied as an exact replacement for OEM part numbers 84257945 and 87705866 and is intended for use with the Holland T8 models listed above.