Description

Clark-hurth 380 III A 1966 Parts Catalog – Factory Specs for the Michigan Tractor Dozer

If you’re wrenching on a Clark-hurth 380 III A 1966 Parts Catalog is the only document that tells you exactly what Clark Equipment shipped from the factory. I’ve seen guys waste a full afternoon on a Brake air line swap because they grabbed the wrong diaphragm from an aftermarket book. This 233-page catalog ends that guesswork. It’s the same binder that sat in the shop office when these machines were new – no reprints, no third-party interpretations.

Brake Assembly Coverage: Front and Rear (B11)

You’ll find the Brake Air Lines (B5, B7, B9), Brake Controls (B12), and the actual Brake Assembly – Front and Rear (B11) laid out in exploded views. Every part has a Clark part number next to it. Need the air chamber for the front axle? Flip to page A3, then cross-check the Brake section. The alphabetical index helps you jump straight to the group without leafing through 200 pages. That index is worth the price alone when a customer is waiting.

Transmission and Torque Converter Parts (T Section)

The T section runs from T3 (Transmission Assembly & Clutch Cover Group) through T21 (Hydraulic System, Transmission & Torque Converter). If you’re rebuilding the clutch cover or replacing the converter pressure regulating valve, you need the factory part callouts. Aftermarket catalogs often blur the difference between first and second clutch groups – this manual gives you separate pages for T8 (First & Second Clutch Group) and T9 (First & Third Shaft Group). One wrong number and the machine is down another week.

How the Alphabetical Index Saves You Time

Pages are grouped alphabetically – Axle (A), Brake (B), Frame (F), Transmission (T), and so on. But the alphabetical index at the front lists every assembly by name: “Midmount Bearing Assembly M2”, “Pitman Arm Steering S9”, “Radiator Assembly R3”. You don’t guess which letter covers the Steering Drag Link – it’s in S6. This is the kind of organization that keeps a weekend job from bleeding into Monday.

Who Needs This 233-Page Catalog?

Anyone who owns or services a Michigan 380 III A tractor dozer. Home garage guys who bought a surplus machine, small fleet owners who keep old iron running, and professional shops that refuse to risk customer downtime on wrong parts. If you’re ordering a Brake Valve & Controls (B12) assembly, you want the exact Clark part, not something that “looks close.” That’s what this catalog delivers – OEM correctness from 1966.

Why OEM Specs Matter More Than Aftermarket Copies

Aftermarket parts catalogs for these older machines are often scanned, redrawn, or compiled from multiple models. They get the numbering wrong, omit the “C” Frame Assembly (C2) revision, or skip the Cold Start Kit (C7, C9). This is the original Clark Equipment Company print – Part No. 3077, dated May 1966. The warranty page (page 3) and improvements note confirm it’s factory. You aren’t guessing if the Propeller Shaft Assemblies (P2) match your serial range. They do.

Related Manuals You Might Need

• Clark-hurth L320 1991 Parts Catalog – 690 Pages OEM Specs
• Clark-hurth 85III 1965 Parts Catalog – Factory OEM Specs
• Clark-hurth 85A, 85A1 1978 Parts Catalog – OEM Factory Specs

Further Reading on Heavy Equipment Parts

See Automotive Industry Overview for background on how these drivelines evolved, or review Internal Combustion Engine principles if you’re pairing a parts order with an engine rebuild. But for the 380 III A, this catalog is your master list.

Does this catalog include torque specs for brake air lines?

No. This is a parts manual, not a service manual. Torque values are not listed.

Can I use this manual to identify parts for a 1967 model 380 III A?

Yes, with a caution. Clark reserved the right to make improvements (see page 3). If your machine serial number falls after the 1966 revision, some parts – especially under “Improvements” – may have been superseded. Compare the serial number breakdown in the front of the catalog. For assemblies like the Accumulator Cushion Kit Z3 or the Cab Assembly Z61, later changes are noted under Z-group “Z” sections. If your serial number is outside the range listed, call Clark’s parts line to confirm supersession. But for the vast majority of 1966–1967 builds, the part numbers here are correct.

Stop wasting time flipping through generic PDFs that were cobbled together from three different models. This is the factory binder, 233 pages, published in 1966, covering every Brake, Axle, Transmission, and Hydraulic assembly on the Michigan 380 III A. Access the Factory Manual now – it’s ready for your tablet or printed binder.