346-6687 3466687 Air Filter Set for Caterpillar D3 D4 D5 & Backhoe Loaders
346-6687 3466687 air filter set for Caterpillar D3 D4 D5 track-type tractors & 415F2-422F2 backhoe loaders. Includes secondary element 346-6688. Factory direct.
Description
346-6687 3466687 Air Filter Set for Caterpillar D3 D4 D5 & Backhoe Loaders
The 346-6687 3466687 air filter set is a primary and secondary (safety) air filter combination engineered for Caterpillar track-type tractors and backhoe loaders. The 346-6687 serves as the main/primary air element, while its secondary safety companion 346-6688 provides a two-stage defense against dust, sand and airborne debris in demanding earthmoving and construction environments. IXIN Filter manufactures both elements to OEM-equivalent specifications, giving fleets and dealers a reliable, factory-direct alternative for scheduled air filter replacement on Cat D3, D4, D5 dozers and 415F2–422F2 backhoe loaders.
As a TS16949-certified filter manufacturer, IXIN supplies the 346-6687 3466687 air filter set to distributors, equipment dealers and service centers in 60+ countries, with consistent batch quality and full traceability for bulk and OEM orders.
Product Specifications
| Element | Attribute | Detail |
|---|---|---|
| 346-6687 (Primary/Main Element) | Outer Diameter | 5 5/8 in to 11 1/4 in (142.9–285.8 mm) |
| 346-6687 (Primary/Main Element) | Lid Diameter | 5 5/16 in to 11 7/8 in (134.9–301.6 mm) |
| 346-6687 (Primary/Main Element) | Inner Diameter | 7/8 in to 6 in (22.2–152.4 mm), one end |
| 346-6687 (Primary/Main Element) | Length | 8 3/8 in (212.7 mm) |
| 346-6688 (Secondary/Safety Element) | Height | 1 1/2 in (38.1 mm) |
| 346-6688 (Secondary/Safety Element) | Outer Diameter 1 | 5 3/16 in (131.8 mm) |
| 346-6688 (Secondary/Safety Element) | Outer Diameter 2 | 10 5/16 in (261.9 mm) |
Compatible Caterpillar Equipment
- Cat D3 Track-Type Tractor
- Cat D4 Track-Type Tractor
- Cat D5 Track-Type Tractor
- Cat 415F2 Backhoe Loader
- Cat 416F / 416F2 Backhoe Loader
- Cat 420F Backhoe Loader
- Cat 422F / 422F2 Backhoe Loader
346-6687 / 3466687 Cross Reference / OE Replacement Numbers
The 346-6687 3466687 air filter set is a direct cross reference and replacement for the following OE and aftermarket part numbers:
| Brand / Source | Part Number |
|---|---|
| Caterpillar OE (Primary) | 346-6687 / 3466687 |
| Caterpillar OE (Secondary) | 346-6688 / 3466688 |
| Baldwin (equivalent, Primary) | PA5289 |
| Baldwin (equivalent, Secondary) | PA5290 |
| WIX | WA10014 |
| WIX | WA10387 |
| Fleetguard | AF25163 |
| Champion | C30400 |
| Sakura | SA17481 |
Note: Confirm your machine’s exact model, serial number range and production year against the OE part number before ordering, as Cat D-series tractors and F2-series backhoe loaders can share filter housings across multiple sub-models.
Why Choose IXIN’s 346-6687 3466687 Air Filter Set
- Two-Stage Filtration Protection — The primary element (346-6687) captures the bulk of dust and debris, while the secondary safety element (346-6688) guards against fine particulates and protects the engine if the primary filter is damaged or during servicing.
- Built for Earthmoving Duty Cycles — Engineered for the dusty, high-vibration conditions typical of track-type tractor and backhoe loader operation on construction and grading sites.
- OEM-Equivalent Fit — Manufactured to match OE dimensions for both 346-6687 and 346-6688, supporting drop-in compatibility across the compatible Cat model range.
- Factory-Direct Supply — As a manufacturer (not a trading company), IXIN offers stable lead times and customization options for private label, packaging and media specification.
- Bulk & OEM Pricing — Volume discounts available for equipment dealers, distributors and fleet operators. Before placing a bulk order, review our tips on choosing a fuel filter supplier — the same sourcing principles apply across filter categories.
Installation & Maintenance Notes
For Cat D3/D4/D5 tractors and 415F2–422F2 backhoe loaders using this air filter set, general service steps include:
- Shut down the engine and allow the air intake system to cool before servicing.
- Remove the air filter housing cover and take out the primary element (346-6687) first.
- Inspect the secondary/safety element (346-6688) — as a general rule, replace it every 2–3 primary element changes, or immediately if it shows visible contamination, and never clean/reuse it.
- Check the housing and seals for dust ingress or damage before installing new elements.
- Install the new primary and/or secondary element, ensuring the gasket seats evenly to prevent unfiltered air bypass.
- Follow your specific Cat model’s recommended service interval — dusty environments typically require more frequent primary filter inspection, so always confirm against your machine’s maintenance schedule.
FAQ
Q: Do I need to replace both 346-6687 and 346-6688 at the same time? A: Not necessarily. The primary element (346-6687) is serviced more frequently based on restriction indicators or visible contamination, while the secondary safety element (346-6688) is typically replaced less often — commonly every 2–3 primary filter changes — unless it becomes visibly dirty or damaged. Always follow your machine’s specific maintenance schedule.
Q: Is this air filter set compatible with all the listed Caterpillar models? A: The 346-6687 3466687 set is designed to fit Cat D3, D4, D5 track-type tractors and 415F2–422F2 backhoe loaders. Because filter housings can be shared across multiple sub-models and production years, confirm your machine’s exact model and serial number range against the OE part number before ordering.
Q: What’s the difference between IXIN’s air filter set and the OEM Caterpillar filters? A: IXIN manufactures both elements to match OEM dimensions and filtration performance. The main difference is price and lead time — IXIN offers factory-direct pricing for bulk and OEM orders without compromising fit or filtration efficiency.
Q: Can I order the 346-6687 3466687 set with custom packaging or private label? A: Yes. IXIN supports customized packaging, labeling and media specifications for distributors and private-label buyers. Contact our sales team with your requirements.
Q: What is the minimum order quantity (MOQ)? A: MOQ varies by customization level. Get in touch with us via WhatsApp or email for current MOQ and lead time on the 346-6687 3466687 air filter set.
