Description

GEHL 602 Parts Catalog – Factory OEM Parts Manual

You ever order a replacement hydraulic fitting for a compact excavator, get the box open, and find out the threads don’t match? That happens when you rely on aftermarket parts lists or guesswork. 152 pages of factory-correct exploded views and genuine GEHL part numbers – that’s what this GEHL 602 Parts Catalog gives you. No reprints, no generic cross-reference. Just the same book the dealer techs pull off the shelf when they need to order the right cap screw or track roller.

I’ve spent 28 years turning wrenches. Nothing wastes time faster than a part that doesn’t fit because someone guessed the supplier number. This catalog opens with clear instructions – use only genuine GEHL service parts, reference your unit’s model and serial number (tagged on the front panel inside the cab), and pay attention to serial number breaks. For example, the introduction states: “Serial Number breaks are indicated as follows: (SN → XXXXX) – indicates serial numbers up to and including XXXXX; (SN YYYYY →) – indicates serial numbers YYYYY and after.” That kind of detail keeps you from ordering a track tensioner that only fits early machines.

Decal Locations and Undercarriage Gear

Decal locations run from pages 4 through 9. If you are replacing a warning label or safety decal, you need those reference numbers to match the OEM layout. Undercarriage gear is split by track type: Rubber Track on pages 10-11, Steel Track (Option) on pages 12-13. Each exploded view lists the part number, description, and quantity. Track-Top Roller and Track Tension sections (pages 14-16) include separate entries for rubber versus steel track. No guessing which bushing fits your undercarriage – the manual calls it out by serial number.

Torque Specs: Where the Manual Saves Your Threads

Torque values are listed in the Hydraulic Fitting Data section and on the inside back cover. Standard attaching hardware torque values are provided, plus metric torque shown in Newton-meters with a conversion factor (multiply by 0.738 to get foot-pounds). If you are replacing cap screws on the dozer blade or chassis, you need those numbers. Overtorque a grade 8.8 bolt and you stretch the threads. Undertorque and the joint leaks. The manual tells you explicitly: “Unless otherwise specified, all cap screws or bolts are Grade 8.8, cadmium or zinc plated.” That’s the kind of spec aftermarket sellers leave out.

Hydraulic Fitting Data – Don’t Guess the Thread Pitch

Hydraulic fitting data is its own section. For anyone who has chased a leak on a compact excavator’s valve cover or rear wall, you know the value of having the correct fitting callout. The manual includes an abbreviations table for fastener descriptions – CS (Cap Screw), HB (Hex Bolt), HLN (Hex Lock Nut), HP (High Pressure), and more. That table is printed right on page 2, so you can decode the exploded view parts lists without flipping to a separate glossary. The exploded view lists also show whether the fastener is metric, slotted, or socket head.

I’ll be straight with you – if you are rebuilding a 602, you need this catalog open on the bench next to the service manual. The service manual gives you procedures, but the parts catalog gives you the exact number to order. For repair procedures like engine overhaul or hydraulic system diagnostics, pair this with the GEHL 502, 602, 652 Service Manual – Factory Specs for Compact Excavators. The two manuals work together. The parts catalog also covers lubrication points (page 21), valve covers (page 23), and the rear wall assembly (page 22).

Why OEM Parts Catalog Beats Aftermarket Cross-Reference

I’ve seen aftermarket catalogs that list “equivalent” parts for the GEHL 602. They might fit, but they don’t carry the same reliability or warranty. GEHL reserves the right to make design changes without updating aftermarket databases. This catalog is printed from the factory’s own files – form number 918041 Revision B, beginning serial number AB00473. That means the part numbers match exactly what a GEHL dealer stocks. If you are ordering online, you can call the dealer and give them the part number right out of this book. No returned boxes. No wasted downtime.

For a broader understanding of how the engine components function, check this Wikipedia article on diesel engines or read this Wikipedia article on diesel engines for background on the fuel and air systems. But when it comes to ordering the correct piston ring or injector seal, stick with the factory catalog.

Related Manuals for the GEHL Line

Need a different year or model combination? The GEHL 602 Parts Catalog covers the serial number break at AB00473. If your machine is a later build, check the GEHL 602 2009 Parts Catalog for updated part numbers. Both are genuine OEM, not aftermarket knockoffs.

FAQ

Does this catalog include part numbers for the entire machine?

Yes – from decals to final drives. It covers undercarriage, chassis, dozer blade, valve covers, hydraulic fittings, and lubrication points. Every exploded view lists the GEHL part number.

Can I use this to identify parts for a 602 with a serial number higher than AB00473?

If your serial number is after AB00473, some parts may have been superseded. The catalog includes serial number breaks in the parts lists, so you can cross‑reference. For machines with later serial numbers, the 2009 edition is more accurate. That said, many of the common components – like cap screws, seals, and track rollers – remain the same. Always verify using your machine’s serial tag. The introduction on page 2 explains how to read serial number breaks: “(SN → XXXXX) – indicates serial numbers up to and including XXXXX; (SN YYYYY →) – indicates serial numbers YYYYY and after.” If your machine falls in a gap between two breaks, call a GEHL dealer with your serial number before ordering. This manual is the best starting point, but later revisions may exist for post‑2009 production.

If you are tired of returning parts and paying restocking fees, get the right information upfront. Access the Factory Manual and keep it on your tablet or print a copy for the toolbox. Your wallet – and your threads – will thank you.