FleetguardtoOrenstein & Koppel
Interchange matrix converting Fleetguard references to their Orenstein & Koppel equivalents, from manufacturer catalog data. Open any part to compare the physical dimensions on record before fitting a replacement.
Verified Interchange Part Numbers
Direct manufacturer catalog matches and 2-hop verified cross-references.
| Fleetguard Reference | Filtration Category | Orenstein & Koppel Replacement | Tolerance & Specs |
|---|---|---|---|
| AF1604 | Air Filter | 1413767 | Compare Specs |
| AF1605M | Air Filter | 1413768 | Compare Specs |
| AF1735K | Air Filter | 583135 | Compare Specs |
| AF1843 | Air Filter | 1415870 | Compare Specs |
| AF25491 | Air Filter | 1445952 | Compare Specs |
| AF25523 | Air Filter | 1484579 | Compare Specs |
| AF25558 | Air Filter | 2271980 | Compare Specs |
| AF25748 | Air Filter | 1487627 | Compare Specs |
| AF25749 | Air Filter | 1487628 | Compare Specs |
| AF25967 | Air Filter | 2907633 | Compare Specs |
| AF26398 | Air Filter | 8488374 | Compare Specs |
| AF350K | Air Filter | 118173 | Compare Specs |
| AF4058 | Air Filter | 744821 | Compare Specs |
| AF418 | Air Filter | 718023 | Compare Specs |
| AF424M | Air Filter | 178637 | Compare Specs |
| AF434KM | Air Filter | 202551 | Compare Specs |
| AF490M | Air Filter | 718024 | Compare Specs |
| LF16015 | Heavy Duty Lube Filter | 6901014 | Compare Specs |
5-Point Inspection Protocol: Fleetguard to Orenstein & Koppel
Before mounting a Orenstein & Koppel substitute onto a system originally calibrated for Fleetguard, complete this 5-point physical clearance inspection:
Thread Pitch & Diameter
Confirm pitch type (Metric vs UN/UNF). Never force a metric M20 thread onto a 3/4-16 imperial mounting stud.
Gasket Seating OD
Measure outer gasket diameter. A discrepancy over 3 mm risks oil blowout under high operating oil pressures.
Bypass Valve Setting (PSI/Bar)
Verify relief valve opening pressure. High bypass differentials circulate unfiltered oil prematurely.
Anti-Drainback Valve
Required if the filter canister is mounted horizontally or inverted to prevent dry starts.
Canister Clearance Height
Ensure adequate clearance from vehicle frame rails, steering linkages, or exhaust manifolds.
Frequently Asked Questions: Fleetguard → Orenstein & Koppel
What does this Fleetguard to Orenstein & Koppel cross-reference show?
Each row pairs a Fleetguard part number with the Orenstein & Koppel reference that manufacturer data lists as its equivalent, alongside the physical dimensions we hold for both. The dimensions are the point: they let you check the match yourself instead of taking the part number on trust.
What is the difference between a direct and an inferred match?
Direct means an official manufacturer source lists the two part numbers as equivalent. Inferred means we reached it through one shared reference (two hops) and the physical specs of both parts agree. We never chain further than that, and any candidate whose specs conflict is dropped rather than published.
What should I check before fitting a Orenstein & Koppel filter in place of a Fleetguard?
Compare the values on both filter pages: thread size, gasket outer diameter, height, outer diameter and bypass pressure. A cross-reference tells you two parts are catalogued as equivalents, not that either one suits your engine. When a value is missing on our side we leave it blank rather than estimate it, so check it against the manufacturer before you buy.
Where does this data come from?
From manufacturer sources only, such as Fleetguard, Donaldson, WIX, Baldwin and SF-Filter. Every filter page links the source it came from. We do not copy other cross-reference sites, and we publish no specification that a source does not state.
Search Other Fleetguard or Orenstein & Koppel Parts
Lookup any reference across our entire cross-brand catalog.