J678603 - OEM O-RING SEAL - CASE CONSTRUCTION
J678603 - OEM O-RING SEAL - CASE CONSTRUCTION
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CASE CONSTRUCTION OEM Part No. J678603

O-ring Seal

Case Construction ·204 Fitments

$6.60 USD · per unit In stock · 5 on hand
Select your machine to check fit
Ships fastFrom our warehouse
30-day returnsNo restocking fees
OEM guaranteedDirect from manufacturer
Machine Model Years
CRAWLER DOZER TIER 2 1850K TIER 2 2002 – 2006
CRAWLER DOZER TIER 2 1850K TIER 2 2002 – 2006
CASE IH AXIAL-FLOW COMBINE (NA) 2366 1998 – 2004
CASE IH AXIAL-FLOW COMBINE (NA) 2366 1998 – 2004
CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001&HAJ300000 2377 2004 – 2007
CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001&HAJ300000 2377 2004 – 2007
CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540 2388 1997 – 2004
CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540 2388 1997 – 2004
CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000 2388 1998 – 2007
CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000 2388 1998 – 2007

Ensure optimal performance of your Case Construction equipment with the O-Ring Seal #J678603. Designed for durability and precision, this essential part prevents leaks and maintains hydraulic integrity, keeping your machinery running smoothly on the job site.

Compatible equipment

This part fits CRAWLER DOZER TIER 2, CASE IH AXIAL-FLOW COMBINE (NA), CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001&HAJ300000, CASE IH AXIAL-FLOW COMBINE (NA) BSN JJC0276540, CASE IH AXIAL-FLOW COMBINE (NA) BTW HAJ292001 & HAJ300000, CASE IH AXIAL-FLOW COMBINE (RU) ASN HAJ300001, AXIAL-FLOW COMBINE (NA) ASN HAJ0300001, CASE IH AXIAL-FLOW COMBINE (NA) ASN HAJ300001, PATRIOT SPRAYER, CASE IH COTTON EXPRESS COTTON PICKER, COTTON EXPRESS COTTON PICKER, AXIAL-FLOW COMBINE (NA), SERIES 2 LOADER BACKHOE - ASN JJG0239360, LOADER BACKHOE (NORTH AMERICA), MODULE EXPRESS COTTON PICKER, 8304 275HP - ENGINE, 8304 305HP - ENGINE, 9004 350HP - ENGINE, CASE WHEEL LOADER (S/N JEE0155000 & BEFORE), CASE WHEEL LOADER (S/N JEE0155001 & AFTER), CASE IH COTTON PICKER, COMBINE, COMBINE ENGINE - 9L PRIOR TO PIN HAJ111001, CASE STANDARD CRAWLER EXCAVATOR (NORTH AMERICA), CASE LONG REACH CRAWLER EXCAVATOR (NORTH AMERICA), CASE CRAWLER EXCAVATOR (NORTH AMERICA), FLOATER, FLOATER - 1999, FLOATER - 2002, WHEEL LOADER, TRACTOR (NA), TRACTOR (EMERGING MARKET), CASE IH MAGNUM TRACTOR (NORTH AMERICA), CASE IH MAGNUM TRACTOR NA, CASE IH MAGNUM TRACTOR (P.I.N. JJA0105000 & AFTER), CASE IH MAGNUM TRACTOR (PRIOR TO P.I.N. JJA0105000), IRRIGATION POWER UNIT, SPRAYER, 4WD TRACTOR (ASN Z6F105001) (NA), 4WD TRACTOR, CASE IH 4WD TRACTOR, CASE IH 4WD TRACTOR (BTW Z6F100023 - Z6F105001), TRACTOR, 4WD TRACTOR ASN, TRACTOR (NORTH AMERICA) including models 1850K TIER 2, 2366, 2377, 2388, 2577, 2588, 3185, 420, 420 TIER 3, 4420, 5088, 580SL, 580SM, 590SM, 6088, 620, 625, 6TAA, 7088, 821C, CPX420, CPX610, CPX620, CR9040, CR9060.

Frequently asked questions

What is the part number?

The manufacturer part number is J678603.

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.

Manufacturer part number
J678603
Internal SKU
IC:J678603
Brand
CASE CONSTRUCTION
Condition
OEM, new
Category
Case Construction
Weight
0.0 lb

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.

This part appears in these diagrams

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