Junction Block

Enhance your heavy equipment performance with the Case Construction Junction Block #440038A1. Designed for durability and reliability, this essential component ensures optimal connectivity and functionality in your machinery, keeping your operations running smoothly and efficiently.

Compatible equipment

This part fits WHEEL LOADER - TIER 4 (NA), WHEEL LOADER - TIER 4B (NA), WHEEL LOADER TIER 4 (NA), SERIES 3 CRAWLER DOZER TIER 3 (NA/EU), CRAWLER DOZER - TIER 4A, CRAWLER DOZER - TIER 4B, CRAWLER DOZER TIER 3 (NA/EU) (HYDRO), CASE WHEEL LOADER (BEFORE S/N JEE0135500), CASE WHEEL LOADER (S/N JEE0135501 & AFTER) - ENGINE SUPPLEMENT, CASE WHEEL LOADER - NA (S/N JEE0135501 & AFTER), WHEEL LOADER TIER 3 (NA), SERIES 3 LOADER LANDSCAPER TIER 3 - ASN N8C510600, 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 - TIER 3 NRC, BACKHOE LOADER 2WD - TIER 3 NRC - MY18, BACKHOE LOADER 2WD - TIER 3 NRC - MY19, BACKHOE LOADER 4WD - TIER 3 NRC - MY18, BACKHOE LOADER 4WD - TIER 3 NRC - MY19, LOADER BACKHOE (TIER 3), LOADER BACKHOE - TIER 3 NRC, 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, LOADER BACKHOE - TIER 3, BACKHOE LOADER (LIVERY) - WIDE TRACK - TIER 3 NRC, BACKHOE LOADER 4WD - WIDE TRACK - TIER 3 NRC - MY18, BACKHOE LOADER 4WD - WIDE TRACK - TIER 3 NRC - MY19, BACKHOE LOADER WIDE TRACK - TIER 3, BACKHOE LOADER WIDE TRACK - TIER 3 NRC, SERIES 3 FORKLIFT TIER 3 - ASN N8C510000 (NA), 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, WHEEL LOADER WASTE HANDLING - TIER 4A (NA), SERIES 2 CRAWLER TIER 2 - 01/21/2005 - 06/16/2006, SERIES 3 CRAWLER TIER 2 - 06/20/2006 - 12/31/2008, CRAWLER DOZER TIER 3 (HYDRO), CASE WHEEL LOADER (NORTH AMERICA), WHEEL LOADER - TIER 4 / TIER 2 (NA), CRAWLER DOZER TIER 3, WHEEL LOADER TIER 3 NA/EU, COMPACT TRACTOR W/CAB - TIER 4B (NA), COMPACT TRACTOR W/ROPS - TIER 4B (NA), COMPACT TRACK LOADER, COMPACT TRACK LOADER - TIER 4B, COMPACT TRACK LOADER - NRC, COMPACT TRACK LOADER - TIER 4A, COMPACT TRACK LOADER - TIER 4B-C, COMPACT TRACK LOADER - TIER 3 - ROW, COMPACT TRACK LOADER - TIER 4F - NA, CRAWLER DOZER - NA, CRAWLER DOZER, COMPACT TRACTOR W/ROPS, TELEHANDLER 120HP 6M - TIER 4, TELEHANDLER 140HP 6M - TIER 4, TELEHANDLER 120HP 7M - TIER 4, TELEHANDLER 140HP 7M - TIER 4, TELEHANDLER 120HP 10M - TIER 4, SKID STEER ENGINE - N844, SKID STEER LOADER, SKID STEER LOADER - NRC, SKID STEER LOADER - TIER 4B, SKID STEER LOADER - TIER 4A, SKID STEER LOADER - TIER 4B-C, SKID STEER LOADER - TIER 3 - ROW, SKID STEER LOADER - TIER 4F - NA, WHEEL LOADER (REV 05/2005), SMALL FRAME TRACTOR TIER 4 (NA) - ZARH06086 AND AFTER, TRACTOR (NA), 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 (EMERGING MARKET), 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, CASE IH MAGNUM TRACTOR (NORTH AMERICA), CASE IH MAGNUM TRACTOR NA, 4WD TRACTOR (ASN Z6F105001) (NA), 4WD TRACTOR, CASE IH 4WD TRACTOR (BTW Z6F100023 - Z6F105001), SKID STEER LOADER TIER 4, 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, TRACTOR, 4WD TRACTOR ASN, TRACTOR (NORTH AMERICA), BIDIRECTIONAL TRACTOR, TRACTOR LOADER TIER 3 (NA), WHEEL LOADERS (NA), WHEEL LOADER (W130/W130TC) (NA), WHEEL LOADER - TIER 2 (INT), WHEEL LOADER TIER 2 (INT), 6'' LIGHT DUTY REAR BLADE including models 1021F, 1021G, 1121F, 1121G, 1150K, 1150M LT, 1150M WT, 1150M WT/LGP, 1650L, 1650M LGP PAT, 1650M WT/LGP, 1650M XLT, 1650M XLT BD, 1650M XLT PAT, 2050M LGP BD, 2050M LGP PAT, 2050M LT, 2050M LT BD, 2050M LT PAT, 2050M WT/LGP, 2050M XLT BD, 2050M XLT PAT, 521D, 521E, 521F.

Frequently asked questions

What is the part number?

The manufacturer part number is 440038A1.

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.