Air Filter Kit 131-8822 / 131-8821 for Caterpillar CAT Excavators & Compactors
131-8822 air filter kit for Caterpillar 320, 322C, 325B and more. OEM cross-reference verified. Bulk and OEM orders welcome from IXIN Filter.
Description
This 131-8822 air filter kit is a precision-manufactured primary and secondary air filter set engineered to match Caterpillar’s OEM specifications for filtration efficiency, dust-holding capacity, and sealing performance. It’s built for excavators and compactors that depend on reliable air filtration to protect engine performance in dusty, high-debris job site conditions.
Product Overview
The 131-8822 / 131-8821 air filter kit includes a primary and secondary filter element designed as a matched pair, ensuring correct fit and consistent airflow through the intake system. Each filter is manufactured using high-density pleated filter media, tested for dust-holding capacity and sealing integrity before shipment, and cross-referenced against Caterpillar OEM dimensions to confirm accurate fitment — not just a part number match.
Fits the Following Caterpillar Models
| Equipment Series | Models |
|---|---|
| Excavators | CAT 320S, CAT 320U, CAT 321B, CAT 322C, CAT 322C L, CAT 322C LN, CAT 322BL, CAT 322BLN, CAT 325B, CAT 325BL |
| Compactors | CAT CS531D, CAT CS533D, CAT CS-563D, CAT CS-573D, CAT CS-583D |
Always confirm your machine’s serial number range against the OEM cross-reference before ordering, as filter specifications can vary across production years within the same model.
OEM Cross-Reference Numbers
| Brand / Reference | Number |
|---|---|
| Caterpillar (Primary) | 131-8822 |
| Caterpillar (Secondary) | 131-8821 |
| Alternate Format | 1318822 / 1318821 |
Key Features
- Matched primary and secondary filter set for correct fit and airflow balance
- High dust-holding capacity pleated filter media, suited for excavator and compactor job site conditions
- Precision-sealed construction to prevent unfiltered air bypass
- Dimensionally verified against OEM specifications, not just cross-reference number matching
- Consistent batch quality control, with raw material and pre-shipment testing on every production run
Specifications (Publicly Referenced Dimensions)
Dimensions below are compiled from publicly available cross-reference filter databases and are provided as a reference guide. Please verify against your machine’s actual filter housing or OEM documentation before bulk ordering — production-year variations within the same model can affect exact fitment.
| Spec | Primary Filter (131-8822) | Secondary Filter (131-8821) |
|---|---|---|
| Height | 343 mm | 323 mm |
| Outer Diameter (Max) | 236 mm | 133 mm |
| Outer Diameter (Min) | 202 mm | 133 mm |
| Inner Diameter / Depth (Max) | 108 mm | 95 mm |
| Seal Type | Radial seal | Radial seal |
| Filter Media | High-density pleated cellulose | High-density pleated cellulose |
| Common Cross-Reference Brands | Baldwin RS3736, Donaldson P536457/G110214, Fleetguard AF25589, Wix 46701, Mann 4564255104 | Baldwin RS3737, Donaldson P536492/G110214, Fleetguard AF25624, Wix 46702, Mann 4509857109 |
| Additional Spec | Detail |
|---|---|
| Kit Contents | 1x Primary Air Filter (131-8822), 1x Secondary Air Filter (131-8821) |
| Housing/End Cap Material | Reinforced composite end caps |
| Application | Excavators, compactors, heavy construction equipment |
| Packaging Options | Standard retail box, bulk carton, or private-label packaging available |
Why Source This Air Filter Kit from IXIN Filter
We manufacture this 131-8822 air filter kit in our own production facility, with quality control checkpoints from raw material inspection through final pre-shipment testing — not just a final visual check before packing. If you’re sourcing for a distribution business or fleet, we can provide:
- Sample kits for independent testing before a bulk order
- Documentation on OEM cross-reference verification
- Flexible MOQ and private-label packaging options
- Consistent batch-to-batch quality for repeat orders
Frequently Asked Questions
Does this kit include both the primary and secondary filter? Yes. The 131-8822 / 131-8821 kit includes one primary filter and one secondary (safety) filter, sold as a matched set.
Will this fit all CAT 320 series excavators? It fits the CAT 320S, 320U, and related models listed above, but filter specifications can vary by production year and serial number range. We recommend confirming your machine’s specific configuration before ordering, especially for bulk purchases.
Can I order this as a private-label product? Yes. Private-label packaging and branding are available — contact us with your volume requirements to discuss MOQ and lead time.
Do you offer samples before a bulk order? Yes. We recommend requesting a sample kit for independent testing before committing to a bulk order, especially for first-time buyers.
Ready to order or request a sample? Contact IXIN Filter for pricing, MOQ, and lead time on the 131-8822 air filter kit.
