New Holland TJ425 Parts Catalog

If you’ve ever ordered a part for a TJ425 and got the wrong one because the aftermarket listing was off, you know the frustration. A day wasted, a tractor down, and a restocking fee. That stops when you have the factory New Holland TJ425 Parts Catalog on your bench. This is the same 663-page binder the dealer parts counter uses. It’s not a repair manual – it’s the exact list of every fastener, seal, hose, and hydraulic component that New Holland put on the machine.

Engine Section: Finding the Right Component

The Engine chapter lists every internal and external engine part by number. Head gaskets, pistons, injectors, turbo components – each with its own figure number and quantity. You don’t guess. You open the catalog, find the assembly diagram, and read the callout. Page 2 shows how the pictorial index works: a hose for the transmission regulator valve supply is listed with a cross-reference to Figure 06-14. That’s the kind of detail that keeps you from ordering the wrong tube.

Fuel System Diagrams and Part Numbers

The Fuel System section breaks down the injection pump, lines, filters, and tank. If you’re tracing a fuel leak or replacing the lift pump, you get the correct New Holland numbered part. No aftermarket catalog guessing. The manual uses OEM nomenclature – you match the number on the old part to the page, and you’re done.

Electrical System – Wire Harnesses and Connectors

Electrical problems on the TJ425 can be a headache. The Electrical System chapter gives you the factory harness breakdown: each connector, relay, and sensor listed with its part number. If you need a dash switch or the main control module connector, the catalog points to the right assembly. Combine this with the service manual for wiring diagrams – the parts catalog gives you the physical pieces.

Why an OEM Parts Catalog Beats Dealer Phone Calls

Calling the dealer to verify a part number costs time and money. The 663-page PDF puts that data on your screen or printout. Cross-references between sections – for example, the power shift transmission lube circuit ties to the steering circuit – are all within the same document. You don’t need to call a parts guy who reads from the same source. You have it.

Using the Pictorial Index – A Real-World Example

Page 2 in the General section shows the pictorial index for the manual shift transmission and PTO clutch lube. It lists nine items, from the transmission regulator valve supply hose (item 1) to the power takeoff valve assembly (item 7). Each line says “See Figure(s) : 06-14(1)” or similar. That’s how you drill down to the exact illustration where the part appears. No fluff – just a direct path from the index to the page with the exploded view.

One paragraph here that runs long because I want to emphasize that this catalog saves you from buying the wrong hydraulic cooler or filter. The hydraulic system section alone covers the cooler, pump supply tubes, and the left-hand filter. If you’re rebuilding the charge pump circuit, you’ll find every o-ring and backup ring. The manual also includes the chassis/attachments section for winch and linkage parts. For a shop that works on these tractors regularly, having the OEM number library means you stock the right parts, not guess.

Short paragraph now.

Automotive Industry Overview – relevant for background on OEM standards, but the catalog speaks for itself.

Does this catalog include torque specs or service procedures?

No. It is a parts catalog only. Torque values and repair steps require the separate service repair manual.

How do I find the oil cooler part number for a TJ425?

Turn to the Hydraulic System section, look for the cooler assembly. The pictorial index on page 3 references Figure 08-02. That figure shows the cooler with callouts and the New Holland part number. Cross-check the item number against the parts list table on the same page. If you don’t have the manual yet, this is why you need it – the figure number (08-02) is unique to this catalog.

Related manuals that follow the same OEM structure:

• Ford New Holland 853 1993 Parts Catalog
• Ford New Holland 568 1991 Parts Catalog
• Ford New Holland 1915 Tractor 1993 Parts Catalog – Section: Supplement

Stop wasting time with aftermarket cross-reference websites that give you six different numbers and no certainty. The New Holland TJ425 Parts Catalog is the final word on what part goes where. Download the Factory Manual from AutoRepairManuals and put the right part on the tractor the first time.