Description

Koehring 6625 1988 Parts Catalog – Factory OEM Parts Reference

Any mechanic who’s spent an afternoon chasing down the wrong bearing for a Koehring 6625 knows the pain. You pull the old part, measure it three times, then order from an aftermarket cross-reference that lists three different numbers for the same assembly. That’s when you start wishing for the factory document. This is that document: the factory-issued Koehring 6625 1988 Parts Catalog, 144 pages of OEM part numbers, exploded views, and serial-number-specific breakdowns. No guesswork.

Koehring 6625 1988 Parts Catalog: Using the Parts Group Index

The catalog organizes every serviceable part by functional groups. You’ll find Group 00 for the hydraulic system, Group 14 for the Detroit Diesel engine, and Group 14A for the Cummins Diesel option. The index on page 3 shows you which group applies to your machine. Each group page uses a letter suffix (e.g., 25A) when a product improvement changed the part. You need to match that suffix to your serial number range. Page 2 of the manual emphasizes: “KNOW THE SERIAL NUMBER OF YOUR MACHINE before searching for replacement parts.” That’s not a suggestion—it’s the only way to guarantee you get the right seal kit or hydraulic pump cartridge.

Why Serial Numbers Matter More Than You Think

Koehring built the 6625 over several years, and running changes happened. One machine might have a different final drive assembly than another built six months later. Aftermarket catalogs often collapse these variants into a single part number, which can cause expensive returns and downtime. The factory catalog breaks out each variation with a distinct group number and letter suffix. You’ll find the serial number on the machine’s data plate. Write it down before you open the manual.

Without the serial number, you’re guessing.

Exploded View Illustrations and Parts List Layout

Each parts group begins with an exploded view illustration showing the relationship of assembled parts. The illustration is keyed directly to an accompanying parts list on the same page or the facing page. This layout means you don’t have to flip back and forth between a diagram and a separate index. The page numbering uses group number plus sequence number (e.g., 1.1, 1.2, 1.2A) to accommodate revisions. If you’re rebuilding the swing gear or the track frame, you’ll see every bolt, bushing, and shim in its correct position. The numerical parts list at the front of the catalog indexes every part number to its page, so you can also look up a number you already have and see what it fits.

3 Reasons to Skip Aftermarket Parts Lists for the 6625

First, aftermarket lists rarely include the letter-suffix group variations that account for product improvements. Second, they don’t carry the Koehring part number revision history—you might order a superseded part that’s no longer available. Third, the factory catalog is the only source that guarantees the part you order matches the exploded view. I’ve seen jobs stopped dead because a “compatible” aftermarket seal didn’t match the factory bore size. This catalog came from Koehring Cranes & Excavators in 1988, and it’s the same reference dealers used. For similar documentation, see the Koehring T-S44, 644 1974 Parts Catalog – Factory OEM Parts Reference and the Koehring S-155 1977 Parts Catalog – Factory OEM Parts Reference. If you have other Koehring equipment, the Koehring 366 Hydraulic Hoe Parts Catalog – OEM Factory Specs covers the 366 model as well. For a broader look at how heavy equipment fits into the machinery world, check out the Automotive Industry Overview on Wikipedia. This is also relevant to Automotive Industry Overview as construction equipment falls under that umbrella.

How the Numerical Parts List Saves You Return Trips

At the front of the manual is a numerical parts list that shows every part number in sequence and keys it to the page where it appears. If you find a part number stamped on an old component, you can look it up here and see whether it’s still a valid serviceable part or if it has been replaced by a newer number. The list also tells you if the part has been discontinued. This eliminates the guesswork of ordering something that doesn’t exist anymore. It’s a simple lookup, but it’s one that aftermarket databases consistently get wrong.

Frequently Asked Questions

Does this parts catalog include torque specifications?

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

How do I find the correct part for my machine?

Locate the serial number plate on your 6625. Then go to the Parts Group Index, find the relevant group (e.g., Group 14 for engine), and look for the letter suffix that matches your serial number range. The exploded view will show the exact part. Cross-reference the part number in the numerical list at the front to confirm it’s still serviceable. If the part number appears in the numerical list with a replacement number, order the superseding part. This is the correct factory procedure. Without the serial number, you risk ordering a part that doesn’t fit. Always verify.

Is this the same manual used by Koehring dealers?

Yes. This is the official factory parts catalog printed in 1988 by Koehring Cranes & Excavators. It’s identical to what dealers had on their shelves.

Can I use this catalog for a Koehring 666?

No, it’s specific to the 6625 model. Check our other listings for the 666.

If you work on heavy equipment, you know the difference between a parts guess and a parts fact. The factory manual gives you the facts. Stop wasting time and money on cross-referenced approximations. Access the Factory Manual and get the correct numbers the first time.