Caterpillar 131-8822 Air Filter

Fitment and Service Notes

The 131-8822 is the element that takes the load on a 320D working in dust. Air enters the cleaner group, the pre-cleaner stage throws out the bulk of the coarse dirt, and the 131-8822 catches what is left before the air reaches the 131-8821 safety element and the engine. Because the element is a radial-seal type, fitment is as much about the seal as the number: the seal face has to be clean and seated, and the housing latches closed, or dust bypasses the element entirely and lands in the intake duct. That failure leaves no evidence on the element itself — which is why the duct and the inner element are what you inspect when a machine shows dust ingestion.

Two habits keep the right element arriving. Read the number off the element you remove rather than off the machine badge, and photograph it next to a tape measure — housings that have been changed at rebuild are common on used 320-family machines. Then treat the inner element as a pair item: the 131-8821 is a safety element, not a spare filter, and an inner that has already been loaded gives no protection the next time the outer is torn or mis-seated.

As a price anchor, aftermarket listings in September 2026 served a 131-8822 plus 131-8821 pair set at around US$99, while a genuine Cat 131-8821 secondary element was listed at $48.98; quality aftermarket elements typically run 30–60% below OEM list, and we quote the pair together so sites do not end up changing one element and leaving the other. The rest of the 320D service set is on the site: the Cat 320D filter guide carries the full list (oil 1R-0739, fuel 1R-0751, separator 326-1644, return 179-9806, pilot 5I-8670, case drain 093-7521), the 179-9806 return filter page covers the hydraulic tank side, and our guide to excavator air filters covers the symptoms, service rules and the Komatsu numbers for the same job.

FAQ

Q: Which machines use the Caterpillar 131-8822 air filter?
A: Aftermarket fitment lists cover 320B, 320C, 320D, 320D2, 320D3, 320E and 320F L excavators, the M325B wheeled excavator and the CP-533D / CP-563D and CS-531D–CS-683E paving compactors, which share the same air cleaner group. On a Cat 320D it is the outer (primary) element and is fitted with the 131-8821 inner element. Housings changed across builds, so confirm against the label on your air cleaner and the number on the element you remove.

Q: Does the 131-8822 include the inner air filter element?
A: No. The 131-8822 is the outer (primary) element only; the inner (secondary) element is the 131-8821 and is ordered separately. Both are normally replaced at the same time — the inner element is a safety element, and an inner that has already been loaded gives no protection the next time the outer element is torn or mis-seated.

Q: What does the 131-8822 air filter cross-reference to?
A: Published cross lists pair 131-8822 with Donaldson P536457 (P812142 appears on some lists), Fleetguard AF25589, Baldwin RS3736, WIX 46701 / 546701, Fram CA9244, Luberfiner LAF8145, Sakura A8508, Mann C24642 and Sure SFA8822P. Cat listings also show 134-0685 as a supersession on some builds. Cross numbers vary between suppliers — treat them as a starting point and confirm the physical fit against the old element.

Q: Is this air filter OEM or aftermarket, and how do I order it?
A: This is a high-quality aftermarket air filter element cross-referenced to Caterpillar OEM 131-8822, typically priced 30–60% below OEM list. Message us on WhatsApp or email sales@cn-machinery.com with your machine model, serial and the number on your old element — stock items dispatch in 3–7 days, FOB Shanghai or CIF to your port.