Description
Fleetguard LF3973 spin-on full-flow lube oil filter for Caterpillar 3406 / C7 (pre-electronic and pre-2000 C7) and Mack E-Tech / ASET applications. Direct replacement for Caterpillar 1R-1807 and Mack 485GB3232 / 485GB3236, and crosses to Baldwin B7225, Donaldson P551807, Wix 51791, and Fram PH9376. Cellulose media with 95% efficiency at 30 microns; no anti-drainback valve, no bypass — matches the original equipment configuration on these engines.
Specifications
| Manufacturer | Fleetguard (Cummins Filtration) |
|---|---|
| Part Number | LF3973 |
| Part Type | Spin-On Full-Flow Lube Filter |
| Thread Size | 1-1/8 in – 16 UN-2B |
| Overall Height | 10.39 in (263.91 mm) |
| Largest Outside Diameter | 4.239 in (107.67 mm) |
| Gasket OD | 3.94 in (99.95 mm) |
| Gasket ID | 3.565 in (90.55 mm) |
| By-Pass Valve Setting | None (0 psi) |
| Anti-Drainback Valve | Not present |
| Standpipe | No |
| Filtration Efficiency | 95% at 30 microns |
Cross References
This filter replaces or is equivalent to the following part numbers:
- Caterpillar: 1R-1807
- Mack: 485GB3232, 485GB3236, 20539275, 57GC2234, 57GC2245
- Donaldson: P551807
- Baldwin: B7225
- Fram: PH9376
- Luber-finer: LFP3236
- NAPA: 7791
- WIX: 51791, 57791
Applications
This oil filter fits the following engines:
- Caterpillar 3406 A/B/C/E (mechanical and early electronic)
- Caterpillar C7 (pre-2000 build configurations using 1R-1807)
- Mack E7 / E-Tech / ASET (per Mack 485GB3232 listing)
Representative chassis and equipment using these engines:
- Mack CH, RD, CL Granite, Vision (E-Tech / ASET-equipped)
- Freightliner FLD, Classic, Century (Cat 3406-equipped builds)
- Kenworth W900, T800 (Cat 3406-equipped builds)
- Peterbilt 379, 385, 387 (Cat 3406-equipped builds)
- Off-highway and industrial Cat 3406 / C7 platforms
Verify the OE filter number on your existing element and your engine serial number / model designation before ordering.
