Description

Koehring 6633LC, 6633-5 Parts Catalog – Factory OEM Parts Reference

Running a shop in San Antonio, I’ve seen more than a few excavators come in with the wrong parts because somebody used a generic parts list. If you own a Koehring 6633LC, 6633-5 Parts Catalog, you need the factory parts catalog. Not a scanned copy of a copy. The original 88-page OEM document. This is the one that tells you exactly which bolt goes where, and which part number supersedes the old one. The manual covers every serviceable part for every machine built of this model designation. Know your serial number before you search.

Crawler & Carbody Group [2] – What You Get

Group 2 breaks down the undercarriage. Track frames, rollers, sprockets, idlers. You need a specific track link? The exploded view on page 2.1 (within the group) shows each component with its part number. Don’t guess at the bolt size. The factory illustration tells you the exact hardware. This is the kind of detail that saves you a return trip to the dealer.

Upper Engine, Fuel Tank [5] – Fuel System Breakdown

Group 5 is where you find the engine assembly, fuel tank, fuel lines, and related components. The manual lists two engine options: Detroit Diesel 14 and Cummins Diesel 14A. Each has its own breakdown. If you need a fuel injector line or a tank gasket, you’ll find it here. The part numbers are direct from Koehring. No cross-referencing to aftermarket catalogs. The fuel system section alone is worth the price of the manual.

7 Groups to Find Parts Faster

The manual organizes parts into functional groups. Crawler & Carbody [2], Upper Structure [3], Counterweight [4], Upper Engine & Fuel Tank [5], Operator’s Cab [27], Controls [28], Mirrors [30], Heating & Air Conditioning [31], Tools [32], and Excavator Attachment [33]. Each group has its own page numbering. The Parts Group Index at the front of the manual (page 2) tells you which group to turn to. No flipping through random pages. That’s how a factory manual works.

Stick with OEM Documentation

Aftermarket parts catalogs often miss revisions. Koehring updated this manual with letter suffixes (e.g., 1.2A, 1.2B) to track changes. The numerical parts list at the front cross-references every part number to the page where it appears. If a part was superseded, the manual tells you. Third-party PDFs strip that information. You end up ordering a part that was discontinued five years ago. This factory catalog is the only reliable source.

Operator’s Cab & Controls – Groups 27 and 28

Group 27 covers the cab and machinery housing. Seat, windows, panels. Group 28 covers the operator’s controls – joysticks, pedals, linkages. The exploded views show how each assembly goes together. If you’re replacing a control lever, you’ll see the bushings, pins, and springs. The manual also includes the [DATA NEEDED] for the cab mounts. No guesswork.

Heating & Air Conditioning [31] – Not Just for Comfort

Group 31 covers the HVAC system. Compressor, condenser, evaporator, hoses. If the AC stops blowing cold, you need the correct compressor part number. The factory manual lists it. Don’t waste time with aftermarket cross-reference charts. Use the OEM part number and move on.

Mirrors and Tools – Groups 30 and 32

Group 30 lists mirrors and brackets. Group 32 lists the tools that came with the machine. If you’re missing the grease gun or the tool kit, you can order the exact factory part. The illustrations show the tools in their correct positions. This is the level of detail that makes a parts catalog useful.

FAQ

Does this parts catalog cover the 6633-5 and 6633LC?

Yes. It covers both models, with serial number break at 110701 for the LC.

What engine groups are included?

The Upper Engine, Fuel Tank group (Group 5) includes the engine assembly, fuel tank, fuel lines, and related components. There are also separate engine assemblies listed: Detroit Diesel 14 and Cummins Diesel 14A. The manual shows exploded views with part numbers for every component from the air cleaner to the exhaust manifold. If you need to order a fuel injector line or a gasket, you’ll find the exact part number here. Don’t trust aftermarket cross-references – use the factory catalog.

Are there part numbers for the hydraulic system?

The parts catalog groups are organized by functional areas. The hydraulic system is not separately listed as a group in the TOC, but components like the excavator attachment (Group 33) include hydraulic cylinders and lines. The manual covers all serviceable parts for every machine built of this model designation.

How do I locate a part number quickly?

Use the Parts Group Index at the front. Find the general area (e.g., Operator’s Cab is Group 27). Then check the exploded view illustrations. The numerical parts list at the front cross-references all part numbers to page numbers. Have your serial number ready – it’s critical for accurate part identification.

If you want to understand the broader context of heavy equipment manufacturing, check the Automotive Industry Overview on Wikipedia. The Automotive Industry Overview is a good background read.

For other Koehring models, see the Koehring 6633-7 6633LC Hydraulic Excavator Parts Catalog, the Koehring T-S44, 644 1974 Parts Catalog – Factory OEM Parts Reference, and the Koehring S-155 1977 Parts Catalog – Factory OEM Parts Reference.

Access the Factory Manual now – it’s the only way to be sure you’re ordering the right part the first time.