Description

Thomas T320 Parts Catalog

I’m Mike Callahan. Twenty-eight years turning wrenches, and I’ve watched more than one job grind to a halt because someone ordered the wrong part. That’s why I keep a factory parts catalog on the bench. The Thomas T320 Parts Catalog is an OEM document – 136 pages of exploded diagrams, part numbers, and the kind of detail aftermarket catalogs skip. If you’re pulling the engine on a T320 skid steer or tracing a wiring fault, this is what you need.

Electrical Wiring: Two Critical Sections

The manual splits the electrical system into ROPS wiring (page 6.1) and engine wiring (page 6.2). Each section shows the harness routing, connector pin-outs, and ground locations. You won’t find this level of detail in a generic diagram. If you’re chasing a CAN bus issue on a T320, the factory Wiring diagrams are the only reliable source. CAN Bus Network basics are covered, but the manual gives you the actual wire colors and splice points.

Engine Group: Air Cleaner to Accessories

Section 7 covers the Engine from air cleaner (7.1) through exhaust (7.2), accessories (7.3), and the engine block itself (7.4). Each page has a parts breakdown with Thomas part numbers – no guessing. For example, the air cleaner assembly includes the filter element, housing, brackets, and any clamps. You can order exactly what you need, not an entire assembly. Internal Combustion Engine fundamentals help, but this catalog shows the specific parts for the T320 power plant.

Does the T320 Parts Catalog Cover the Undercarriage?

Track systems are in Section 8: tracks (8.1), locking arms (8.2), and tandem supports (8.3). If you need to replace a track or rebuild the tensioner, the exploded view shows every bolt, bushing, and bearing. No aftermarket catalog gives you that. You get the OEM part numbers stamped on the original components. This saves time on parts counter calls.

9 Sections of Optional Equipment

Section 9 is thick – over twenty subsections covering cab enclosure, heater, block heater, backup alarm, self-level valve, hand controls, hi-flow, optional wheels, hydraulic oil heater, interior light, driving lamp, purifier, mirrors, stop switch, cab liner, and conversion kits. Each one has its own parts list. If your T320 has a cab heater that’s leaking, page 9.2 shows the heater core, hoses, and valve. That’s the kind of detail that keeps a machine running.

Why a Factory Parts Catalog Matters

I’ve seen too many techs trust aftermarket cross-reference guides and end up with the wrong seal kit. The Thomas T320 Parts Catalog is printed from the same files the dealership uses. Every part number has been verified against the Thomas manufacturing system. You don’t get that from a third-party compilation. The 136 pages include the mainframe section (fuel system, rear door, universal quick-tach, lift arms) starting on page 1.1. Thomas T-233 HD, T-203 HD, T-183 HD, T-173 Parts Catalog – OEM Parts Manual and Thomas 173 HLS II 1996 Parts Catalog – Factory OEM Manual follow the same format – if you run those machines, grab them too. For the T245 HDK, there’s Thomas T245 HDK 2002 Parts Catalog – OEM Factory Manual.

Your Parts List, Not a Guessing Game

When you pull a part off the T320, you can flip to the right page and match the diagram to what’s in your hand. The catalog uses clear line drawings with callouts. No photos, which means the detail is consistent. Each part has a reference number linked to the part number list. That’s how you avoid ordering a whole hydraulic pump when you only needed a seal. The Electrical section alone has saved me hours on harness repairs.

Can I use this parts catalog to perform a full engine rebuild?

No, this is a parts catalog. It shows exploded views and part numbers, not service procedures. For torque specs and disassembly steps, you need the Thomas T320 service manual.

How do I find the right part number for the cab heater hose?

Go to Section 9.2 – Cab Heater. The exploded diagram shows the heater assembly with callouts. Each callout corresponds to a line in the parts table that lists the Thomas part number, description, and quantity. Compare the hose shape and length to the diagram. If your machine has the optional hydraulic oil heater (Section 9.12) or a different cab enclosure (9.1), make sure you’re looking at the correct sub-section. The catalog covers all factory options, so match your machine’s VIN or configuration. If the hose isn’t listed, check the Optional Wheel Equipment (9.11) or the Wheel Ready Conversion Kit (9.21) – some hoses are shared across kits. Worst case, call Thomas dealer with the part number from the diagram.

Access the Factory Manual. Stop guessing what part fits. The Thomas T320 Parts Catalog puts the OEM data on your screen – 136 pages, indexed, searchable. Get it now and get back to work.