Description

Koehring 6605 Parts Catalog

If you’ve ever ordered a part for an excavator and ended up with the wrong track shoe because the aftermarket book had a typo, you know the cost of guessing. That’s why this Koehring 6605 Parts Catalog exists. It’s 86 pages of factory-vetted part numbers, group breakdowns, and serial number ranges straight from the original Koehring Cranes & Excavators documentation. No reprints, no aftermarket redraws — just the original litho print reproduced for the workbench.

Crawler & Carbody: Page 1 Gets It Right

Group G in the table of contents covers the entire undercarriage. The catalog starts with the crawler assembly on page 1.1, and you get exact part numbers for upper roller assemblies (730 3586), lower rollers (730 3075), and even the frame variants — serial number breaks are listed as 108301-108450 versus 108451-on. If your machine has a 21.65” shoe, you order 730 4477, not the 15.75” shoe. That level of detail keeps you from pulling a track only to find the bolt pattern is different. The chart on that page also includes hardened bolts (M10 x 20, part 730 0077) and lock washers. No guesswork on fasteners.

Upper Engine and Fuel Tank Layout

Look at the upper structure groups in the index — Upper Engine, Fuel Tank are listed there. The catalog shows the fuel system components under that group, including the fuel tank itself and related brackets. If you’re rebuilding an engine or replacing fuel lines, you need the correct part numbers for the Koehring 6605. Aftermarket catalogs often blur the line between models. This one doesn’t. You see the exact part, quantity, and remark column that tells you if a part was superseded or used only after a certain serial number. That’s how you avoid buying a fuel cap that doesn’t fit the neck.

Hydraulic System: What’s Listed in Group 8

The hydraulic system group includes the pump drive, valves, lines, and fittings. Page references in the group index guide you to the correct section. If you need a rotary joint fitting, it’s part 730 3590 on page 1.1. The catalog also covers the swing system and the blade attachment. When you’re ordering seals or hoses, having the OEM number means you can cross-reference without buying a service manual you don’t need. This is a parts catalog, not a repair manual — but without accurate part numbers, even the best repair manual won’t get you running.

3 Reasons to Stick with the OEM Parts Catalog

1. Serial number breaks. Every page lists a SERIAL NO. column. If Koehring changed a part mid-production, you see it. Aftermarket catalogs flatten that into one part number that may or may not fit your machine.
2. OEM illustrations. The line drawings show the assembly exactly as Koehring designed it. You see how the idler ass’y (730 3587) fits with the track adjuster. No translation errors.
3. Part numbers that work. The part numbers in this catalog are the ones dealers recognize. Ordering 730 0217 (M8 lock washer) from a dealer gets you the right fastener. Ordering a generic equivalent may get you a washer that doesn’t carry the same load rating.

For other Koehring excavator references, check the Koehring 6605 1987 Parts Catalog – Factory OEM Parts Reference for Excavator or the Koehring T-S44, 644 1974 Parts Catalog – Factory OEM Parts Reference and Koehring S-155 1977 Parts Catalog – Factory OEM Parts Reference manuals. They all follow the same factory indexing structure.

Electrical System and Operator Controls

The electrical system group covers wiring harnesses, switches, and the cab controls. If you’ve ever traced a short in a 20-year-old excavator, you know the value of an OEM diagram. This catalog lists each component by part number — from the heating and air conditioning group to the mirrors and marking decals. The operator’s controls section includes joystick and pedal assemblies. You don’t need to guess which switch matches your serial range because the remarks column tells you. That’s the difference between ordering once and ordering twice.

Does this parts catalog include torque values or repair procedures?

No. This is strictly a parts catalog, not a service manual. You will not find torque specs or step-by-step disassembly instructions here. For that, you need the Koehring 6605 service manual.

How do I use the serial number column on each page?

The SERIAL NO. column lists the range of machine serial numbers that each part applies to. For example, on page 1.1, the lower frame (730 3399) is listed as 108301-108450, while a later frame (730 4790) takes over at 108451. If your machine serial is 108400, you order the first frame. Always check the remarks column — it may indicate a superseded part or a compatibility note. Ignoring the serial break is the number one reason parts don’t fit. If your serial number falls outside the ranges listed, contact a Koehring dealer with your full machine serial.

When you’re sourcing parts for a Koehring 6605, you need the factory document that matches the original engineering. This catalog gives you the same information the dealer’s counter uses. For a broader look at how OEM documentation fits into heavy equipment maintenance, read the Automotive Industry Overview and Automotive Industry Overview – the same principles of sourcing verified specs apply to construction machinery. Access the Factory Manual and have the right part number ready before you call the dealer.