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BALDWIN · Engine Oil Separator

OAS99028

Oil/Air Separator Spin-on

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Stock checked September 11, 1:46 PM Eastern. Call before travelling so we can confirm what is still available.

THE DETAILS THAT MATTER

FILTER SPECIFICATIONS.

Filter type
Oil/Air Separator Spin-on
Thread
M32 x 1.5
Outside diameter
4 11/32 in.
Outside diameter (mm)
110.3
Length
10 3/8 in.
Length (mm)
263.5
Contains
Integral Post Seal
Gasket
[1] Included
Manufacturer part number
OAS99028
GTIN
00791440072435

Baldwin replacement references: Atlas Copco 1622035101, 2903035101

Baldwin PIES August 20, 2026 · Baldwin Product Guide July 24, 2026.

START WITH THE NUMBER YOU HAVE

CROSS-REFERENCE NUMBERS.

Baldwin’s reference lists the numbers below for OAS99028. Keep any size, quantity or application conditions with the match. A cross-reference alone does not confirm fit on your equipment.

21 manufacturer reference rows

Brand / manufacturerReference numberCondition / noteReference qty
ABAC90563221
ALUP KOMPRESSOREN172111021
ATLAS COPCO16220351011
ATLAS COPCO29030351011
BALDWIN FILTERSOAS990281
BLITZ SCHNEIDER7581591
CARQUEST992401
CECCATO6405521
DONALDSONP7834871
FAI (KOMATSU)DSP09001
FLEETGUARDAS24531
FLEETRITEASR824531
GRAINGER4ZUY51
GREYFRIARSSEP6032S1
IRMER & ELZE7545581
JURA (HIFI)OV60751
MANN+HUMMELLB111021
MANN+HUMMELLB1110221
MARK6405521
SF-FILTER / SCHUPPSPA500281
WOODGATEWGOS11121

Source: Baldwin Specs & Interchange · July 27, 2026. Reference quantity is part of the manufacturer’s cross-reference, not store stock.

CHECK THE EQUIPMENT. CHECK THE ENGINE.

APPLICATIONS & EQUIPMENT.

Call with your equipment model, engine and the number on the existing filter. Our counter will help verify the application.

A REAL COUNTER. CLOSE TO HOME.

YOUR LOCAL FILTER PEOPLE.

Bring the number off your old filter, or your equipment and engine details. We’ll help check the match.