Donaldson P777639 RadialSeal™ Safety Air Filter – Secondary Element for Tractors & Heavy-Duty Equipment
Donaldson P777639 RadialSeal™ Safety Air Filter – Secondary Element for Tractors & Heavy-Duty Equipment is backordered and will ship as soon as it is back in stock.
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Donaldson P777639 RadialSeal™ Safety Air Filter – Secondary Element...
Protect your heavy-duty diesel engine with the Donaldson P777639, a premium RadialSeal™ safety (secondary) air filter element engineered for tractors, combines, telehandlers, and agricultural machinery operating in high-dust environments . This high-efficiency filter delivers ISO 5011-certified filtration performance using advanced cellulose media, capturing harmful airborne contaminants that bypass or break through the primary filter .
Features Donaldson's RadialSeal™ leak-proof sealing technology for positive, reliable installation. Cylindrical design with 403.1mm length, 108.5mm outer diameter, and 87.6mm inner diameter . Designed as the secondary inner element and must be used with primary outer filter P777638 or P781039 .
Vehicle Fitment:
Always verify fitment using your machine's specific model, year, and serial number before ordering. OEM part numbers are provided for cross-reference purposes only.
Product Specifications:
OEM & Aftermarket Cross-References:
Why Choose Donaldson P777639?
Donaldson is a world leader in filtration technology for over 100 years, trusted by OEM manufacturers globally for agricultural, construction, industrial, and heavy-duty applications . The P777639 is a safety (secondary) air filter element, designed to protect your engine in the event of primary filter failure or during maintenance operations in high-dust environments.
RadialSeal™ technology ensures a leak-proof, positive seal that prevents unfiltered air bypass – a critical feature for secondary elements that serve as the final line of defence against contaminant ingestion . Tested to ISO 5011 standards for certified filtration performance .
⚠️ Important:
This is a safety / secondary element. It must be used in conjunction with a primary air filter element – specifically designed to fit with Donaldson P777638 or P781039 . Always replace both primary and safety elements together according to your equipment manufacturer's maintenance schedule. Never operate equipment with only the safety element installed.
Genuine Donaldson replacement components are designed to meet or exceed original equipment specifications. Trust the original.
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