Koehring T-S44, 644 1974 Parts Catalog – 150 Pages OEM Part Numbers

Description

You’re holding a worn-down bracket that looks right but the bolt holes don’t line up. You’ve been there. Ordering parts for a Koehring T-S44, 644 1974 Parts Catalog without the factory parts catalog is a gamble you lose more often than not. This is the 1974 OEM parts catalog – the same book the dealer used to pull part numbers. 150 pages of exploded views, group indexes, and exact part designations. Let’s talk about what’s inside.

11 Groups Covering Every Assembly

The manual opens with a GROUP INDEX on page 2 that splits the machine into 11 logical groups. Main frame, counterweight, fuel tank, rotek lubricator – group 1. Engines, engine controls, clutch, gear reduction unit – group 2. Hydraulic system is group 3. Swing speed reducer group 4. Cab, seat, controls group 5. Electrical system group 6. Accessories group 7. Telescoping boom group 8. Boom attachments group 9. Stabilizers group 10. Hydraulic remote control group 11. Then general reference information wraps it up. Each group has its own page numbering starting at 1.1, so you can skip right to the section you need without flipping through unrelated material.

Main Frame and Fuel Tank: Getting the Right Brackets and Bushings

Page 3 shows the main frame assembly for Model 644 (Revision 1 November 1974). You’ll see part numbers like B54301 for the main frame itself, B54388 for the cover, and B46061 for the winch bolt. Bronze bushings, brass dowels, self-aligning bushings, grease fittings – all listed with quantities and reference numbers. The fuel tank bracket? It’s in group 1 with the counterweight. If you need a battery bracket, A18288-1 is right there. This is the level of detail that keeps you from ordering a part that almost fits.

Electrical System: Avoiding Cross-Wiring Nightmares

You think you know which wire goes where until you hook up a new starter solenoid and smoke comes out. The electrical system section (group 6) contains the factory wiring diagrams and component callouts. Not generic ‘wire color’ guesses – actual Koehring part numbers for switches, relays, and connectors. If you’re working on a T-S44 that sat in a field for ten years, this section alone is worth the access. Check out related manuals like Koehring S-155 Hoekruiser 1977 Parts Catalog or Koehring 366 Hydraulic Hoe Parts Catalog if you’re running a mixed fleet.

How the Hydraulic System Parts Are Organized

Group 3 covers the hydraulic system – pumps, valves, cylinders, and hoses. Each component is broken down into sub-assemblies with part numbers for seals, O-rings, and fittings. You won’t find torque specs here (that’s in the service manual), but you will find the exact part number for the seal kit on the swing motor. For an overview of heavy equipment documentation standards, see Automotive Industry Overview. The Automotive Industry Overview also covers part numbering systems used by OEMs like Koehring.

Verify Part Numbers Against Serial Number

Every page in this catalog ends with the line: “WHEN ORDERING, SPECIFY BANTAM SERIAL NUMBER, PART NUMBER AND NAME OF PART REQUIRED.” That’s not a suggestion. Koehring used running changes – a 1974 T-S44 built in January might have different bushings than one built in December. Your machine’s serial number is stamped on the main frame tag. Write it down before you order anything. This catalog is the tool that lets you cross-reference that serial number with the right revision of the part. If you’re also working on a Koehring 166 Hydraulic Excavator Parts Catalog, the same principle applies.

Why Factory OEM Documentation Matters

Aftermarket parts catalogs often combine multiple models into one generic book. They drop the revision dates, leave out the litho-in-USA part numbers, and substitute their own index. This is a direct scan of the original Koehring print – Part No. T-644-80, Litho In USA, dated 1974. The exploded drawings match the physical parts you have in your hand. No guesswork. You order from page 1.1 and it fits.

Does this parts catalog include torque specs?

No. This is a parts catalog, not a service manual. It lists part numbers only.

How do I use the group index?

The group index on page 2 lists 11 groups covering everything from the main frame to the hydraulic remote control. Each group has its own page numbers. For example, group 1 starts at page 1.1. You look up the group that matches the assembly you’re working on, then find the part number and diagram. Cross-reference the part number with your serial number printed on the machine. That serial number is required when ordering from the factory – see page 2 of the manual.

Does it cover the T-S44 only?

It covers both the T-S44 and the 644 model. The 644 is listed on page 3 as Model 644.

Can I get this as a printed book?

This is a digital access PDF. You can print it yourself or view on a tablet in the shop.

You’ve got a machine to fix and parts to order. Don’t spend another afternoon on the phone with a supplier reading off worn stampings. Access the Factory Manual, open the group index, and get the exact part number you need. Your wallet – and your machine – will thank you.