Description

CASE IH STX425 Parts Catalog – 758 Pages of Factory Part Numbers

You grab a part off the shelf, bolt it on, and it doesn’t fit. Maybe the thread pitch is off, maybe the hose length is wrong. That’s wasted time and money. A CASE IH STX425 Parts Catalog stops that before it starts. This is the factory printed book — 758 pages of exploded views, part numbers, and serial number breaks. Not a scan of a scan. Not a third-party reprint. Original OEM data.

758 Pages of Factory Parts Data

That’s not a number pulled out of the air. The document runs 758 pages. Every page comes from CASE IH’s own documentation. You get the same part numbers the dealer uses. No aftermarket interpretation. Need a transmission regulator valve supply hose? The catalog tells you exactly which figure to look at — Figure 06-18 or 06-19 depending on transmission type. Page references are baked into the pictorial indexes.

Pictorial Index: How This Catalog Saves Mistakes

The manual starts with pictorial indexes. For example, Section 01-01 covers the Manual Shift Transmission and PTO Clutch Lube. It shows a numbered diagram with lines pointing to components like hose, filter, cooler, and tube. Each item has a reference to a later detail figure. You don’t guess “that looks like the PTO valve pressure supply tube.” You see item 8 on page 2 — tube, PTO Valve Pressure Supply, See Figure 06-20. That’s the level of specificity you need on a 4WD tractor with 150+ hydraulic lines.

Manual Shift Transmission and PTO Clutch Lube

Section 01-01 covers the manual shift transmission and PTO clutch lube circuit. The catalog lists nine components from the regulator valve supply hose to the PTO valve lube supply tube. Each gets a part number, quantity, and description. If the left-hand filter (item 3) is plugged, you order the correct CASE IH filter by number, not by “looks about right.” The same applies to the cooler, hydraulic oil (item 4). Cross-referencing between sections is direct — no flipping through a vague index.

Power Shift Transmission and Steering Circuit

Two more pictorial indexes cover the power shift transmission (01-02) and the steering circuit (01-03). The power shift version swaps the transmission pump supply tube connections — Figure 06-19 instead of 06-18. The steering circuit index shows ten components including hoses, fittings, and the steering control valve. You get the exact routing and part numbers for the steering circuit lube and supply lines. That matters when you’re elbow-deep in a hot tractor and need the right O-ring kit for a steering valve.

Why OEM Part Numbers Matter

Aftermarket parts catalogs sometimes list “replaces OEM number X.” But they don’t tell you the serial number break. This catalog uses serial number after JEE0099501. The parts changed after that point. Order a pre-break tube for a post-break tractor and you’re drilling holes. The factory book gives you the break, the figure, and the exact CASE IH part number. No assumptions. No guesswork.

If you work on other CASE IH models, check the CASE IH 7210, 7220 Parts Catalog – Factory Specs or the CASE IH JX 70U, MX 80C, 90C, 100C, MX 100 Parts Catalog. For the larger Steiger tractors, see the STEIGER 385 / 435 Radiator and Hoses Parts Catalog.

Understanding the broader context of automotive and heavy equipment standards helps. Read the Automotive Industry Overview to see how OEM documentation fits into the supply chain. For basic engine principles, check Internal Combustion Engine.

Who Needs This Parts Catalog

Home mechanics who maintain their own STX425. Farm owners who don’t want to drive an hour to the dealer for a one-digit part number. Junkyard pickers who need to identify which transmission parts interchange. This catalog saves the back-and-forth. You look up the component in the pictorial index, get the part number, and order. No calls to the dealership parts counter with a vague description.

Does this catalog include torque specs or repair procedures?

No. This is a parts catalog, not a service manual. It lists part numbers, quantities, and cross-references to figures. For repair procedures, you need the separate service manual.

How do I know the part numbers are current for my tractor?

The catalog is broken by serial number (after JEE0099501). CASE IH updated parts over production runs. If your tractor is within that range, you get the correct numbers. The pictorial indexes and figure references are direct from the factory — not generic. This is the same document the dealer uses. You can rely on it for ordering replacement hoses, tubes, filters, and fittings. The 758 pages cover every hydraulic circuit, transmission variant, and steering component. No aftermarket substitute. No reprint. Factory original.

Access the Factory Manual now and stop ordering parts that don’t fit. You’ll have the correct CASE IH part numbers at your fingertips, with the serial number break and exploded views that tell you exactly where each component goes. No more “I think that’s the right hose.” You’ll know.