Description

Koehring 6620 1986 Parts Catalog – Factory OEM Parts Reference

You ordered a part for a Koehring 6620 1986 Parts Catalog job. The box shows up, the part is wrong, and now you’re eating the restocking fee. That stops when you work off the factory book. This is the 1986 OEM parts catalog – not a photocopy from some third-party reseller that merged two different serial ranges. Page 2 gives you the parts groups: Crawler & Carbody, Upper Engine, Fuel Tank, Swing System, Hydraulic System – all laid out by group number so you can flip straight to the section you need without guessing. Page 3 starts the numerical parts list – every OEM part number cross-referenced to the page where you see the exploded diagram. No mystery parts, no ‘call for price’ runaround.

Upper Engine, Fuel Tank: Group Listings That Save Time

When you need an injector line or a fuel filter head for a 6620, you don’t want to scroll through a generic website that lists everything as ‘engine part – fits many models’. This catalog groups the Upper Engine and Fuel Tank together. You get the exact OEM part numbers for the 1986 hydraulic excavator. Fuel system components – tanks, lines, filters, brackets – all listed with illustration callouts. No aftermarket repackaging. If you’ve ever tried to match a fuel return line using a Chilton’s drawing, you know why this matters.

Electrical System: Factory Part Numbers for Every Connector

Electrical gremlins on a Koehring 6620 can shut down a job site fast. The Electrical System section in this catalog lists every component from the main harness to the dash switches. You get the OEM part number – not a generic ’12V light’ description. Need a specific relay socket? It’s there. Want the correct ignition switch for your serial number range? The numerical parts list on page 3 pulls it up fast. Aftermarket catalogs skip details like terminal types and wire gauge specs. This one doesn’t.

Does the 1986 Catalog Cover the Pump Drive and Swing System?

Yes. Swing System and Pump Drive both have dedicated group listings with exploded views. The swing motor, swing brake, pump drive couplers, charge pump – all part-numbered. If you’re rebuilding the swing gearbox, you need the seal and bearing numbers from this catalog. Don’t trust an online forum’s ‘I think it’s this one’ advice. Use the factory cross-reference. The parts groups are numbered so you can jump from group [2] Crawler & Carbody straight to group [12] Tools without flipping through unrelated sections.

3 Reasons OEM Outruns Aftermarket Parts References

1. Part numbers match the exact design revision for your serial range (6620s built between #1174001 and #1175000). Aftermarket books often combine multiple years.
2. Group organization mirrors what the assembly line used. If you’re ordering a track chain, group [2] Crawler & Carbody lists every roller, sprocket, and pad individually.
3. The numerical parts list on page 3 gives you a single index to locate any OEM number across all 120 pages. No web search, no ‘this part supersedes to that part’ guesswork.

Source Validity: OEM Print, Not a Copy

This catalog is a direct reproduction of the original Automotive Industry factory document printed by Koehring Cranes & Excavators in May 1986. The inside cover shows the official ordering address: Koehring, Manufacturers Road, Chattanooga, TN. Litho in USA. The OCR excerpt on the scrap pages matches exactly what you see in the PDF – no reprints, no greyscale loss. You get the same part numbers the dealer parts counter used. Automotive Industry Overview – that’s the industry standard for documentation integrity.

Related Manuals for Your Shop

• Koehring 6620 Hydraulic Excavator Parts Catalog
• Koehring T-S44, 644 1974 Parts Catalog – Factory OEM Parts Reference
• Koehring S-155 1977 Parts Catalog – Factory OEM Parts Reference

Is this catalog for the Koehring 6620 with serial numbers 1174001 to 1175000?

Yes, it covers that serial range.

Does the catalog include part numbers for the engine and fuel system?

It has a dedicated Upper Engine, Fuel Tank group with part numbers.

Can I use this to order replacement electrical components?

Yes, Electrical System group lists every component from connectors to harnesses. You need the exact part numbers from this catalog to avoid mismatched parts. Aftermarket catalogs skip details like terminal types and wire gauge specs. This one has them all, including the factory callouts for the 6620’s 24V system.

How many pages?

120 pages of numbered parts groups and numerical parts list.

Stop burning billable hours on wrong parts. Get the same factory reference that Koehring dealers used in 1986. Access the Factory Manual and start ordering the right part the first time.