O-ring

Enhance your heavy equipment’s performance with the Case Construction O-Ring #31112. Designed for durability and precision, this essential component ensures a reliable seal, preventing leaks and maintaining optimal functionality in your machinery. Perfect for all Case models.

Compatible equipment

This part fits BACKHOE, CASE CRAWLER TRACTOR, CRAWLER DOZER, COMPACT WHEEL LOADER TIER 3, CRAWLER DOZER TIER 2, CASE UNI-LOADER SKID STEER LOADER, SMALL WHEEL LOADER, LOADER, CASE TERRATRAC CRAWLER TRACTOR, BACKHOE AND LOADER FOR 530CK TRACTORS, BACKHOE FOR W7, W9A, W9B, W10, CASE GAS & DIESEL WHEEL TRACTOR, LOADER AND BACKHOE, CASE WHEEL TRACTOR, BACKHOE AND LOADER, BACKHOE FOR 310G AND 450 CRAWLER, BACKHOE FOR 580CK, BACKHOE FOR W SERIES RIGID LOADERS, BACKHOE FOR 680CK TRACTOR, BACKHOES FOR CRAWLER MODELS 750, 850, 1150, SERIES A INTERNATIONAL LOADER TRACTOR, BACKHOE FOR 450, 450B, 850, 850B, AND W14, CASE SKID STEER LOADER, CASE WHEEL TRACTOR W/LOADER BACKHOE, CASE CONSTRUCTION KING WHEEL TRACTOR, CASE CONSTRUCTION KING LOADER BACKHOE, CASE LOAD KING WHEEL LOADER, CASE LONG TRACK CRAWLER TRACTOR, IND - CASE CRAWLER TRACTOR, LOADER LANDSCAPER, SERIES-2 LOADER LANDSCAPER - ASN JJG0225755, SERIES 3 LOADER LANDSCAPER TIER 3 - ASN N8C510600, LOADER LANDSCAPER - LIVERY, LOADER LANDSCAPER - TIER 4B - MY26, LOADER LANDSCAPER - TIER 4A ASN NCC570600, TRACTOR LOADER BACKHOE, BACKHOE LOADER, BACKHOE LOADER TIER 4- MR1UP, CASE CONSTRUCTION KING FORKLIFT, CASE CONSTRUCTION KING TRACTOR W/SHUTTLE TRANSMISSION, ELECTRIC FOUR WHEEL DRIVE, SERIES 2 LOADER BACKHOE - ASN JJG0239360, BACKHOE LOADER - TIER 3 NRC, BACKHOE LOADER - TIER 4A - FROM PIN NCC560000, 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 NRC, LOADER BACKHOE - BSN JJG0239361, BACKHOE LOADER - TIER 4A - FROM PIN NCC564000, LOADER BACKHOE, BACKHOE LOADER - WIDE TRACK, 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, BACKHOE LOADER, WIDE TRACK - TIER 3 NRC, BACKHOE LOADER, CENTER PIVOT, TOOL CARRIER, 4WD - TIER 4B - MY22, BACKHOE LOADER, CENTER PIVOT, TOOL CARRIER, 4WD - TIER 4B - MY24, BACKHOE LOADER, CENTER PIVOT, TOOL CARRIER, 4WD - TIER 4B - MY25, BACKHOE LOADER, CENTER PIVOT, TOOL CARRIER, 4WD, WEST VIRGINIA - TIER 4B - MY24, BACKHOE LOADER, SIDE SHIFT, STRAIGHT LOADER ARM, 4WD - TIER 3 - MY21, BACKHOE LOADER, SIDE SHIFT, TOOL CARRIER, 4WD - TIER 4B - MY22, BACKHOE LOADER, SIDE SHIFT, TOOL CARRIER, 4WD - TIER 4B - MY25, CASE FORKLIFT, FORKLIFT - LIVERY, FORKLIFT, SERIES 2 LOADER BACKHOE - ASN JJG0210575, CASE TERRATRAC GASOLINE CRAWLER TRACTOR, CASE TURBO HORIZONTAL DIRECTIONAL DRILLING MACHINE, CASE WHEEL LOADER, SERIES 1 CRAWLER - 07/01/2002 - 01/31/2005, CASE TRENCHER, CASE SERIES-2 TELESCOPIC HANDLER, CASE TELESCOPIC HANDLER, CASE TIER-2 TELESCOPIC HANDLER, CRAWLER DOZER TIER 3, 6WD MOTOR GRADER ELECTRO-HYDRAULIC - STAGE V, AWD MOTOR GRADER MY20 - STAGE V, MOTOR GRADER - ASN 020001, MOTOR GRADER TIER 2- BTW 020101-020187, Tier-4, CASE TURBO TRENCHER, MOTOR GRADER - ASN 022001, MOTOR GRADER TIER 2 - ASN 022101, MOTOR GRADER - ASN N5AF04007, MOTOR GRADER - ASN 024001, MOTOR GRADER TIER 2 - BTW 024102-024129, CASE CRAWLER EXCAVATOR, CRUSHER, MIDI CRAWLER EXCAVATOR, 2 PIECE BOOM, CAB - STAGE V, MINI CRAWLER EXCAVATOR, ELECTRIC, ROLL-BAR, MINI CRAWLER EXCAVATOR, CAB - STAGE V, MINI CRAWLER EXCAVATOR, CAB - TR4F, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM,CAB - STAGE V, MINI CRAWLER EXCAVATOR, CANOPY - STAGE V, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM, CAB - STAGE V, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM, CANOPY - STAGE V, MINI CRAWLER EXCAVATOR, CAB - STAGE V MY24, MINI CRAWLER EXCAVATOR, CANOPY - STAGE V MY26, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM, CAB - STAGE V MY24, MIDI CRAWLER EXCAVATOR, CAB - STAGE V, IRRIGATION POWER UNIT, SKID STEER LOADER - TIER 3 - ROW, REGULATED NA - TIER 4 - MY26, SKID STEER LOADER - TIER 4F - NA, REGULATED NA, TIER 4 - MY26, SV340B-RGV-AP, MINI TRACK LOADER 1000 - STAGE V, ELECTRIC MINI TRACK LOADER, COMPACT TRACK LOADER - TIER 3 - ROW, COMPACT TRACK LOADER - TIER 4F - NA, CASE UNIT LOADER including models 33S, 1150D, 1150H, 1150M LT, 1150M WT, 1150M WT/LGP, 1155D, 121E SERIES 3, 1450B, 1455B, 1650K, 1650K XLT, 1650M LGP PAT, 1650M WT/LGP, 1650M XLT, 1650M XLT BD, 1650M XLT PAT, 1840, 1850K TIER 2, 2050M LGP BD, 2050M LGP PAT, 2050M LT, 2050M LT BD, 2050M LT PAT, 2050M WT/LGP.

Frequently asked questions

What is the part number?

The manufacturer part number is 31112.

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.