Back-up Ring

Enhance your heavy equipment’s performance with the Case Construction Back-Up Ring #L30443. Designed for durability and precision, this essential part ensures optimal sealing and reliability, keeping your machinery running smoothly in demanding conditions. Perfect for Case equipment maintenance.

Compatible equipment

This part fits DMI ECOLO-TIL, CASE CRAWLER EXCAVATOR, CASE LOGGER CRAWLER EXCAVATOR, CASE TRACTION KING TRACTOR (AFTER S/N 9806101), CASE TRACTION KING TRACTOR (BEFORE S/N 9806101), CASE UNI-LOADER SKID STEER LOADER W/DEUTZ ENGINE, CASE CRAWLER TRACTOR, SERIES - CASE UNI-LOADER SKID STEER LOADER, CASE UNI-LOADER SKID STEER LOADER (NORTH AMERICA), CASE UNI-LOADER SKID STEER LOADER, BACKHOE, LOADER, CASE CRAWLER TRACTOR (S/N 3023001 TO 3032301), CASE CRAWLER TRACTOR (S/N 3032301 TO 3039619), CASE CRAWLER TRACTOR (S/N 3039619 & AFTER), BACKHOE AND LOADER FOR 530CK TRACTORS, BACKHOE FOR W7 W9A W9B W10, 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, CASE LOADER BACKHOE ATTACHMENTS, LOADER AND BACKHOE FOR 580CK SERIES B, CASE TRENCHER, CASE CRAWLER TRACTOR (PRIOR TO S/N 3038436), CASE CRAWLER TRACTOR (S/N 3038436 TO 3060306), CASE CRAWLER TRACTOR (S/N 3060306 & AFTER), CASE CABLE LAYER W/301B ENGINE (PRIOR TO S/N 3058169), CASE CABLE LAYER W/336 ENGINE (S/N 3058169 & AFTER), CASE CONSTRUCTION KING LOADER BACKHOE, CASE LOAD KING WHEEL LOADER, CASE CONSTRUCTION KING LOADER BACKHOE AFTER S/N 3739160 (EUROPE), CASE CONSTRUCTION KING LOADER BACKHOE BEFORE S/N 3739160 (EUROPE), CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE, CASE SUPER-E CONSTRUCTION KING LOADER BACKHOE, CASE CONSTRUCTION KING FORKLIFT, CASE CONSTRUCTION KING LOADER BACKHOE (S/N 9101501 TO 9102281), CASE CONSTRUCTION KING LOADER BACKHOE (UP TO S/N 9101501), CASE SERIES-B CONSTRUCTION KING LOADER BACKHOE (S/N 9102282 TO 9103968, CASE SERIES-B LOADER BACKHOE (S/N 9103967 TO 9105879), CASE SERIES-C CONSTRUCTION KING LOADER BACKHOE (S/N 910600 TO 9111008), CASE SERIES-C CONSTRUCTION KING LOADER BACKHOE (S/N 9111009 & AFTER), CASE IH MAGNUM TRACTOR (NORTH AMERICA), TRENCHER SUPPLEMENT (NORTH AMERICAN HOMOLOGATION), CASE IH STEIGER 4WD TRACTOR (FROM S/N 17900650 TO JCB0003599), CASE IH STEIGER 4WD TRACTOR (PRIOR TO S/N 17900650), CASE IH STEIGER 4WD TRACTOR (S/N JCB0003600 & AFTER), CASE IH STEIGER 4WD TRACTOR (AFTER S/N 17900649), CASE BACKHOE, CASE TRENCHER W/1.8L DIESEL ENGINE, CASE TRENCHER W/2.1L ENGINE, CASE TRENCHER (S/N 1187961 & AFTER), CASE TRENCHER W/LOADER BACKHOE, DAVIS FLEETLINE 30 4 TRENCHER, DAVIS FLEETLINE 40 4 TRENCHER, CASE UNIT LOADER W/POD CAB (S/N 9119672 & AFTER) (NORTH AMERICA), CASE UNIT LOADER W/POD CAB (S/N 9119672 & AFTER), CASE WHEEL LOADER, CASE WHEEL LOADER (NORTH AMERICA), CASE WHEEL LOADER (PRIOR TO S/N 17754000), CASE WHEEL LOADER (S/N 17754000 & AFTER), CASE UNIT LOADER including models 1000, 1080, 1187, 1200, 1280B, 1529, 1550, 1700, 1830, 1835C, 1840, 1845, 1845B, 1845C, 1845S, 26, 26B, 26C, 26S, 310G, 32, 32S, 33, 33S, 34.

Frequently asked questions

What is the part number?

The manufacturer part number is L30443.

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.