O-ring

Enhance your heavy equipment’s performance with the Case Construction O-Ring #86503303. Designed for durability and precision, this essential part ensures optimal sealing and reliability, keeping your machinery running smoothly in the toughest conditions. Perfect for maintenance and repairs.

Compatible equipment

This part fits CASE CRUZ-AIR WHEELED EXCAVATOR, VERSATILE LARGE 4WD TRACTOR, CASE LOGGER CRAWLER EXCAVATOR, KIT PUMP MOUNTING W/LOADER FOR FMD FPM FSM TRACTORS, KIT HYDRAULIC USED W/LOADER ON FMD FPM FSM TRACTORS, CRAWLER DOZER - TIER 1, CASE CRAWLER DOZER (TIER 1), CRAWLER DOZER TIER 2, CASE DIESEL TRACTOR (PRIOR TO S/N 17895000), CASE DIESEL TRACTOR (S/N 17895000 THRU 002 & UP), CASE DIESEL TRACTOR, CASE DIESEL TRACTOR (PRIOR TO S/N 17897500), CASE DIESEL TRACTOR (S/N 17897500 TO 17897505 17897510 & AFTER, STACKER PLANTER 12 ROW 30IN SPACING, STACKER PLANTER 12 ROW 36IN SPACING, STACKER PLANTER 12 ROW 38IN SPACING, STACKER PLANTER 12 ROW 40IN SPACING, STACKER PLANTER 16 ROW 30IN SPACING, PLANTER 23 ROW 15IN SPACING SPLIT ROW PIVOT TRANSPORT, PLANTER 24 ROW 15IN SPACING SPLIT ROW PIVOT TRANSPORT, PLANTER 24 ROW 20IN SPACING PIVOT TRANSPORT, PLANTER 24 ROW 22IN SPACING PIVOT TRANSPORT, PLANTER 31 ROW 15IN SPACING SPLIT ROW PIVOT TRANSPORT, PLANTER 32 ROW 15IN SPACING SPLIT ROW PIVOT TRANSPORT, PLANTER 12 ROW 2 POINT HITCH FRONT FOLD, PLANTER 16 ROW 2 POINT HITCH FRONT FOLD, PLANTER 16 ROW DRAW BAR FRONT FOLD, PLANTER 24 ROW 2 POINT HITCH FRONT FOLD, PLANTER 24 ROW DRAW BAR FRONT FOLD, PLANTER 24 ROW 30IN SPAC FRONT FOLD, PLANTER 32 ROW 30IN SPAC FRONT FOLD, PLANTER 36 ROW 20IN SPAC FRONT FOLD, PLANTER 36 ROW 22IN SPAC FRONT FOLD, PLANTER 36 ROW 30IN SPAC FRONT FOLD, PLANTER 47 ROW 15IN SPAC FRONT FOLD, 3 CYL AG HIGHWAY TRACTOR, VERSATILE BIDIRECTIONAL TRACTOR, INTERNATIONAL HARVESTER SELF-PROPELLED WINDROWER, INTERNATIONAL HARVESTER COMBINE (BEAN SPECIAL), INTERNATIONAL HARVESTER COMBINE, SERIES A INTERNATIONAL LOADER TRACTOR, DROTT SERIES-D CRAWLER EXCAVATOR (S/N 6266131 & AFTER), DROTT SERIES-B CRAWLER EXCAVATOR, DROTT SERIES-D CRAWLER EXCAVATOR (S/N 6270716 & AFTER), DROTT SERIES-E CRAWLER EXCAVATOR (S/N 6271140 & AFTER), DROTT SERIES-B FELLER/BUNCHER CRAWLER EXCAVATOR, DROTT SERIES-A CRAWLER EXCAVATOR, INTERNATIONAL HARVESTER COTTON PICKER, CASE TRACTOR, CASE IH TRACTOR, CASE SERIES-E CRAWLER EXCAVATOR (S/N 6280543 & AFTER), DROTT SERIES-B CRAWLER EXCAVATOR (S/N 550 & AFTER), DROTT SERIES-D CRAWLER EXCAVATOR (S/N 6279926 & AFTER), INTERNATIONAL HARVESTER FORAGE HARVESTER, LOADER LANDSCAPER - LIVERY - TIER 4B, LOADER LANDSCAPER - TIER 4B, LOADER LANDSCAPER - TIER 4A ASN NCC570600, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C303000, SERIES 3 LOADER BACKHOE TIER 3 (NA) - ASN N8C500000, BACKHOE LOADER (LIVERY) - TIER 3 NRC, BACKHOE LOADER (LIVERY) - TIER 4B, BACKHOE LOADER - TIER 3 NRC, BACKHOE LOADER - TIER 4A - FROM PIN NCC560000, BACKHOE LOADER - TIER 4B, BACKHOE LOADER 2WD - TIER 3 NRC - MY18, BACKHOE LOADER 2WD - TIER 3 NRC - MY19, BACKHOE LOADER 2WD - TIER 4B - MY18, BACKHOE LOADER 2WD - TIER 4B - MY19, BACKHOE LOADER 4WD - TIER 3 NRC - MY18, BACKHOE LOADER 4WD - TIER 3 NRC - MY19, BACKHOE LOADER 4WD - TIER 4B - MY18, BACKHOE LOADER 4WD - TIER 4B - MY19, LOADER BACKHOE (TIER 3), LOADER BACKHOE - TIER 3 NRC, LOADER BACKHOE - BSN JJG0239361, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C304000, SERIES 3 LOADER BACKHOE TIER 3 (NA) - ASN N8C5040000, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C307000, SERIES 3 LOADER BACKHOE TIER 3 (NA) - ASN N8C508000, BACKHOE LOADER - TIER 4A - FROM PIN NCC564000, LOADER BACKHOE - TIER 3, BACKHOE LOADER (LIVERY) - WIDE TRACK - TIER 3 NRC, BACKHOE LOADER (LIVERY) - WIDE TRACK - TIER 4B, BACKHOE LOADER - WIDE TRACK - TIER 4B, BACKHOE LOADER 4WD - WIDE TRACK - TIER 3 NRC - MY18, BACKHOE LOADER 4WD - WIDE TRACK - TIER 3 NRC - MY19, BACKHOE LOADER 4WD - WIDE TRACK - TIER 4B - MY18, BACKHOE LOADER 4WD - WIDE TRACK - TIER 4B - MY19, BACKHOE LOADER WIDE TRACK - TIER 3, BACKHOE LOADER WIDE TRACK - TIER 3 NRC, BACKHOE LOADER WIDE TRACK - TIER 4A, NH 3-TIE IN-LINE SQUARE BALER, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C309000, SERIES 3 LOADER BACKHOE TIER 3 (NA) - ASN N8C508500, SERIES 3 LOADER BACKHOE TIER 3 (NA) - ASN N7C431854, BACKHOE LOADER - TIER 4A, INTERNATIONAL HARVESTER COMBINE (PRIOR TO S/N 23001), INTERNATIONAL HARVESTER COMBINE (S/N 23001 & AFTER), SERIES - 6 CYL TRACTOR, 6 CYL AG TRACTOR ROW CROP, 6 CYL AG TRACTOR INDUSTRIAL, 6 CYL AG TRACTOR, 6 CYL AG TRACTOR ALL PURPOSE, 6 CYL AG TRACTOR FLAT DECK, CASE CRAWLER EXCAVATOR, BIDIRECTIONAL TRACTOR W/EMISSIONIZED ENGINE, BIDIRECTIONAL TRACTOR, LARGE 4WD TRACTOR, VERSATILE 4WD TRACTOR, VERSATILE TRACTOR, CASE IH 4WD TRACTOR, CASE CRAWLER EXCAVATOR (S/N 6203751 & AFTER), BACKHOE LOADER - STRAIGHT LOADER ARM (LIVERY) - TIER 3 NRC (LAR), BACKHOE LOADER - TIER 3, BACKHOE LOADER CENTER PIVOT STRAIGHT LOADER ARM 4WD (LAR) - TIER 3 - MY19, BACKHOE LOADER (LIVERY) - TIER 4B (NA), BACKHOE LOADER CENTER PIVOT STRAIGHT LOADER ARM 2WD - TIER 4B - MY19, BACKHOE LOADER CENTER PIVOT STRAIGHT LOADER ARM 4WD - TIER 4B - MY19, BACKHOE LOADER TIER 3 (2008), BACKHOE LOADER CENTER PIVOT STRAIGHT LOADER ARM 2WD - TIER 3 - MY19, BACKHOE LOADER CENTER PIVOT STRAIGHT LOADER ARM 4WD - TIER 3 - MY19, BACKHOE LOADER - STRAIGHT LOADER ARM (LIVERY) - TIER 3 NRC, BACKHOE LOADER - TOOL CARRIER (LIVERY) - TIER 3 NRC, BACKHOE LOADER CENTER PIVOT TOOL CARRIER 4WD - TIER 3 - MY19, BACKHOE LOADER - LONG REACH - TIER 4A, BACKHOE LOADER - LONG REACH - TIER 4B, BACKHOE LOADER - TOOL CARRIER (LIVERY) - TIER 4B, BACKHOE LOADER - TOOL CARRIER - TIER 4A, BACKHOE LOADER - TOOL CARRIER - TIER 4B, NH 3-TIE INLINE SQUARE BALER, CRAWLER DOZER, CRAWLER DOZER (N.A. VERSION), MOTOR GRADER, WHEEL LOADER, WHEEL LOADER (N.A. VERSION), WHEEL LOADER -, WHEEL LOADER - LOW EMISSION ENGINE SUPPLEMENT (N.A. VERSION), TRACTOR - TIER 4A, TRACTOR - TIER 4A CVT, AFS CONNECT - WHEEL T4B CVT (NA/ROW), AFS CONNECT - WHEEL T4B PST (NA/ROW), TRACTOR - TIER 4B CVT (ROW), TRACTOR - TIER 4B PST (ROW), TRACTOR - TIER 3 PST (CHINA), AFS CONNECT - ROWTRAC T4B CVT (NA/ROW), AFS CONNECT - ROWTRAC T4B PST (NA/ROW), ROWTRAC TRACTOR - TIER 4B CVT, ROWTRAC TRACTOR - TIER 4B PST, TRACTOR 4WD FPS W/CAB LWB - TIER 3 (BR), SPRAYER, PLM INTELLIGENCE - WHEEL T4B CVT (NA/ROW), PLM INTELLIGENCE - WHEEL T4B PST (NA/ROW), PLM INTELLIGENCE - SMARTTRAX T4B CVT (NA/ROW), PLM INTELLIGENCE - SMARTTRAX T4B PST (NA/ROW), SMARTTRAX TRACTOR - TIER 4B CVT, SMARTTRAX TRACTOR - TIER 4B PST, 6 CYL BIDIRECTIONAL VERSATILE TRACTOR, TRACTOR LOADER TIER 3 (NA), TRACTOR LOADER - TIER 4A including models 1085C, 1150V, 1156V, 1187, 1187B, 1285, 1286, 1850K LGP, 1850K LT, 1850K TIER 1, 1850K TIER 2, 1850K XLT, 1896, 2090, 2094, 2096, 2130, 2140, 2150, 2160, 2290, 2294, 234, 2390, 2394.

Frequently asked questions

What is the part number?

The manufacturer part number is 86503303.

Is this a genuine OEM part?

Yes. Southeastern Equipment stocks OEM and quality aftermarket parts for heavy equipment. Contact us if you need a specific OEM source or aftermarket option.

Will this fit my machine?

See the compatible equipment list above. If your model is not listed, call us with your machine's serial number and we can confirm.

Where does this ship from?

Southeastern Equipment Company ships parts nationwide from our US warehouse. Orders placed before 2 PM ET typically ship same day.

Free pickup at any of our 17 branches across Ohio, Indiana, Michigan, and Kentucky. Select your preferred branch at checkout.

30-day no-fault returns. Bought the wrong part? Send it back for a full refund — no restocking fees, no minimums.