Hydraulic Fitting Diagnostic Coupler

Enhance your Case Construction equipment’s performance with the Hydraulic Fitting – Diagnostic Coupler #190117A1. This durable, precision-engineered component ensures reliable hydraulic connections, enabling efficient diagnostics and maintenance for optimal heavy equipment operation. Perfect for professionals in the industry.

Compatible equipment

This part fits WHEEL LOADER - TIER 4 (NA), WHEEL LOADER - TIER 4B (NA), WHEEL LOADER TIER 4 (NA), 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), WHEEL LOADER WASTE HANDLING - TIER 4A (NA), CASE WHEEL LOADER (NORTH AMERICA), WHEEL LOADER - TIER 4 / TIER 2 (NA), WHEEL LOADER TIER 3 NA/EU, WHEEL LOADER TIER 3 (NA/EU) including models 1021F, 1021G, 1121F, 1121G, 521D, 521E, 521F, 521G, 621D, 621E, 621F, 621G, 721D, 721E, 721F, 721G, 821E, 821F, 821G, 921E, 921F, 921G.

Frequently asked questions

What is the part number?

The manufacturer part number is 190117A1.

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.