Description

JLG 4017 2014 Parts Catalog – Factory OEM Parts Breakdown

If you have ever ordered a part for a 4017 telehandler based on a third-party parts list and ended up with a bearing that doesn’t fit the second boom section, you know the frustration. An aftermarket catalog might say “fits JLG 4017” but miss the revision H changes from March 31, 2014. This JLG 4017 2014 Parts Catalog (3121859) is the actual factory-issued document, 357 pages thick, with original part numbers and illustrations. No reprint, no copy, no guesswork.

Frame & Attaching Parts: When Shrouding Gets Damaged

Section 1 runs through every piece of shrouding on both sides, axle and fender installation, outrigger mounting systems (including the LMIS-equipped variant), and the hood. Each figure, from 1-1 to 1-7, has an exploded view with callouts. Need the bracket for the right side frame shroud? Figure 1-1 lists it. Aftermarket manuals often combine left and right into one generic drawing — this catalog separates them on pages 1-2 and 1-6.

Boom Sections: Bearings, Pads, and Shims (Figures 2-2, 2-4, 2-6, 2-8)

Four boom sections, each with dedicated bearing, pad, spacer, and shim figures. If you are rebuilding a second boom section, Figure 2-4 gives the exact OEM shim stack referenced in the catalog. Use this to order the correct thickness without pulling an old part first. The Quick Switch Assembly (Figure 2-9) is also covered — aftermarket parts catalogs frequently leave that out.

Engine & Attaching Parts: Perkins Engine and Four-Speed Transmission

Section 4 covers the Perkins engine assembly, fuel tank and lines, cooling system, air filter, muffler, and AC pump. Then it dives into the four-speed transmission with 14 figures (4-8 through 4-21) breaking down converter housing, case and plate, torque converter, gear groups, pump drives, charging pump, reverse idler, forward/reverse shaft, third shaft, first/second shaft, output shaft, electric control, drive plate, and drop box. A parts catalog this detailed means you order exactly the clutch pack or seal ring needed. Automotive Industry Overview might cover general drive train theory, but it won’t give you the JLG part number P/N 3121859 or the revision level.

Hydraulic Circuits: Cylinder Breakdowns (Figures 8-4 through 8-8)

Figures 8-4 through 8-8 cover lift cylinder, crowd cylinder, tilt and tilt compensating cylinder, auxiliary function, and boom hydraulics assembly. Each cylinder is shown with its seals, pistons, rods, and ports. If you are replacing a seal kit on the crowd cylinder, you need the correct OEM kit number — not a generic “fits JLG” bag. This catalog gives the factory breakdown. Automotive Industry Overview is background reading; the parts catalog is what you actually use on the workbench.

Who Needs This 357-Page Manual?

Home garage guys who own a JLG 4017 and want to rebuild an outrigger or swap a boom section. Small fleet operators who cannot afford a week of downtime waiting for the wrong part. Any mechanic who has been burned by aftermarket parts catalogs that show a part number that was superseded seven years ago. The effectivity page shows this manual went through revisions A through H, with the latest being March 31, 2014. That means you are getting the most current factory data for that year.

Source Authenticity: Factory OEM vs Aftermarket

This is the Parts Catalog issued by JLG, an Oshkosh Corporation company. It is not a reprint from a third-party aggregator that scanned a worn copy and lost a callout number. Aftermarket parts lists often mix part numbers across serial number breaks. JLG stamping and part numbers do not lie — if Figure 2-2 says bearing P/N [DATA NEEDED] for the first boom section, that is what you order. Do not trust a generic “fits 4017” description. Find related manuals for other JLG models: JLG 8042, 10042, 10054 2012 Parts Catalog – Factory OEM Skytrak Manual covers larger telehandlers; JLG 1930ES-3246ES 2012 Parts Catalog – Factory OEM Parts Manual covers scissor lifts; JLG TOUCAN 1010 2010 Parts Catalog – Factory OEM Manual covers mast lifts.

Does this manual include torque specs for the boom bearings?

No, this is a parts catalog, not a service manual. Torque values are not listed.

How does this manual differ from aftermarket parts lists?

Aftermarket parts lists often merge multiple revisions into one list, so you might get a part number that was superseded in 2012. This factory catalog shows exactly which figures and callout numbers correspond to the 4017 as built in 2014. The effectivity page documents every revision from A (2004) to H (2014). If your machine falls within that serial range, you have the correct part number. Aftermarket sources frequently omit the LMIS outrigger variant (Figure 1-6) or the Quick Switch Assembly (Figure 2-9). That difference can turn a one-hour repair into a three-day wait for the right bracket.

Can I use this to identify part numbers for the outrigger LMIS system?

Yes. Figure 1-6 shows the outrigger mounting equipped with LMIS, with separate callouts for the LMIS-specific components. No need to cross-reference a separate load chart.

Is the manual updated with the March 2014 revision H?

Yes. The effectivity page lists March 31, 2014 as revision H. That is the latest revision for this part number.

When you are standing in front of a 4017 with a busted axle seal or a worn boom pad, you need the exact OEM part number from the factory source. That is what this 357-page catalog delivers. Do not order another part from a generic website that may or may not match your serial number. Access the Factory Manual and get the correct JLG part number the first time.