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Donaldson P629466 Secondary Air Filter (Safety) RadialSeal
P629466Donaldson P629466 secondary (safety) air filter, RadialSeal, 126 x 68 x 335 mm, 95 percent efficiency at ISO 5011. Backs up the primary element and protects the engine during primary filter service. Crosses to Baldwin RS5746 and Fleetguard AF25961. Genuine and OEM quality available. Bulk orders welcome.
Donaldson P629466 secondary engine air filter – the safety element that sits inside the primary. It does two jobs: it stands guard if the primary element fails or is fitted wrong, and it seals the clean side of the intake while the primary is being serviced, so no dust sneaks in during the change. The safety media is designed to clog fast and visibly when contamination gets past the primary, which warns the operator there is a problem upstream. Fits housings sized for a 126 mm outer diameter, 68 mm inner diameter, 335 mm long element.
Specifications
| Part Number | P629466 |
|---|---|
| Product | Engine air filter element, secondary (safety) |
| Brand | Donaldson – RadialSeal™ |
| Outer Diameter | 126 mm (4.96 in) |
| Inner Diameter | 68 mm (2.68 in) |
| Length | 335 mm (13.19 in) |
| Type / Style | Safety / Radialseal |
| Efficiency | 95 percent (ISO 5011) |
| Weight | 0.36 kg |
| Cross References | Baldwin RS5746, Fleetguard AF25961, WIX 49868, NAPA 9868 |
| Condition | New |
| Fits | Confirm by part number, the old element stamp, or the dimensions above before ordering – pairs with Donaldson P628326 primary element |
Key Features
- Backup layer behind the primary element – if the primary is damaged or wrongly seated, this one catches what slips through
- Seals the clean side during primary filter changes, which is when engines swallow the most dust
- Blinds quickly under heavy contamination, giving a visible warning instead of silent engine wear
- RadialSeal™ end face seats straight into the housing – press in evenly until it stops
- Donaldson service rule: change the safety element every third primary change, or immediately after any primary failure
Signs of Wear
The safety element is cheap insurance, but it is not a consumable to swap casually: replace it every third primary change, after any primary element failure, or whenever it has been removed and handled roughly. A clogged safety element shows up as the same restriction warning as a loaded primary – if a fresh primary does not clear the warning, the safety element is the suspect.
Related parts we also supply
- Donaldson P628326 Primary Air Filter RadialSeal – matching primary element
- HOWO Air Compressor 202V54100-7134/1 – engine-mounted air compressor
- Weichai WP7 Engine Wiring Harness 1000023185 – engine-side wiring loom
Send the part number or a photo of your old element, and we confirm fitment and quote within one working day. Genuine and OEM quality available. Bulk orders welcome.
Frequently Asked Questions
Is P629466 a direct replacement?
Donaldson P629466 secondary (safety) air filter, RadialSeal, 126 x 68 x 335 mm, 95 percent efficiency at ISO 5011. Backs up the primary element and protects the engine during primary filter service. Crosses to Baldwin... It replaces the OEM number directly for heavy truck and equipment applications (send your VIN or a photo of the old part and we will confirm). Share your chassis number and we will verify the match before shipment.
Can you supply P629466 in OEM quality?
Yes. OEM and original options can both be quoted, plus a cost-effective aftermarket alternative. Every option is checked against the OEM number before dispatch.
Do you have a minimum order quantity for P629466?
MOQ is 1 piece. Stock is dispatched in 2-3 working days, and for out-of-stock items we confirm a firm lead time (usually 5-10 working days) before you pay.
Can P629466 be sent by air express?
Yes - air express is available for urgent orders, with sea or rail freight for larger quantities. You receive inspection photos before dispatch and tracking after pickup.
Need parts for your fleet?
Send your parts list or a nameplate photo — we reply with availability and price within 12 hours.