O-ring O Ring

Compatible equipment

This part fits CASE CRUZ-AIR WHEELED EXCAVATOR, CASE CRAWLER TRACTOR, CASE TRACTION KING DIESEL TRACTOR, UTILITY BACKHOE, BACKHOE, LOADER, CASE FORKLIFT, CASE WHEEL TRACTOR, LOADER (S/N 4065701 THRU 4077628), CASE WHEEL TRACTOR W/LOADER BACKHOE, CASE CRAWLER TRACTOR (PRIOR TO S/N 3038436), CASE CRAWLER TRACTOR (S/N 3038436 TO 3060306), CASE CRAWLER TRACTOR (S/N 3060306 & AFTER), CASE LONG TRACK CRAWLER TRACTOR, CASE CABLE LAYER W/301B ENGINE (PRIOR TO S/N 3058169), CASE CABLE LAYER W/336 ENGINE (S/N 3058169 & AFTER), CASE WHEEL LOADER (BEFORE S/N JEE0135500), CASE WHEEL LOADER (S/N JEE0135501 & AFTER) - ENGINE SUPPLEMENT, CASE WHEEL LOADER - NA (S/N JEE0135501 & AFTER), CASE CONSTRUCTION KING WHEEL TRACTOR, IND - CASE CRAWLER TRACTOR, CASE WHEEL LOADER, CASE WHEEL LOADER (NORTH AMERICA), CASE WHEEL LOADER (S/N JEE0155001 & AFTER), WHEEL LOADER (REV 05/2005), TRACTOR (NA), TRACTOR - TIER 4B CVT (NA), SERIES - CASE WING CHISEL PLOW including models 1085C, 1150D, 1150E, 1150G, 1150H, 1155D, 1155E, 1450B, 1455B, 1470, 21, 22, 31, 310, 310B, 320B, 42, 420B, 420BD, 430, 440, 450, 450B, 450C, 455B.

Frequently asked questions

What is the part number?

The manufacturer part number is D21006.

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.