Description

Genie S-120, S-125 2012 Parts Catalog

You have a Genie boom lift with a blown drive hub motor or a torn decal set. You look at the parts book on your tablet. If the numbers do not match, you order the wrong part, the lift sits down for three days, and the customer is calling every hour. That is the real cost of guessing. I have seen it happen more times than I care to count. This Genie S-120, S-125 2012 Parts Catalog is the factory-printed document that kills the guesswork. It is 170 pages of exploded views, part numbers, and serial number ranges that tell you exactly which piece goes where. No aftermarket interpretation. No reprints.

170 Pages of Exploded Diagrams and Part Numbers

The catalog is broken into sections that match how the machine is built. You get the drive chassis components starting on page 14, the extendable steer axle views, the wheel and drive hub assemblies, and the chassis components themselves. Every figure links directly to a parts list with Genie part numbers. You do not have to cross-reference a third-party database. The information came off the same line drawings used to assemble the lift in the factory. If you need a new steer axle knuckle or a drive hub brake disc, the page number and the part number are right there.

Page 20 shows the drive hub assembly with brake. That is a common wear point. The catalog shows the exploded layout, the bearings, the seals, and the brake assembly. The part number for the hub itself is listed. You call your Genie dealer, give them that number, and the part shows up at your shop two days later. Compare that to pulling the hub, measuring it, and gambling on an aftermarket substitution. That costs billable hours and risks a failure at height.

S-120 and S-125: Serial Number Ranges Listed

The manual covers S-120 models from serial number S12011D-101 and S-125 models from S12511D-101. Those numbers are printed on the chassis tag. If your lift has an earlier serial number, this catalog may not be correct. Page 1 of the catalog spells out the exact range. I have seen techs order a whole axle assembly because they did not check the serial number. The axle changed design midway through 2012. The catalog catches that. Do not skip this step.

How to Order Parts Correctly

There is an entire section called “How to Order Parts” on page 8, plus a fax order form on page 9. The catalog tells you to read the serial number first, then locate the figure, then write down the part number, the quantity, and the description. If you are ordering online, you still use the same part number. The catalog also includes a parts stocking list on page 7 – a list of high-wear items that should be on your shelf. That keeps downtime to a minimum when a hydraulic hose blows on a Friday afternoon.

Decals and Symbols: Page 10

Decals are where I see the most mismatched replacements. A 2012 S-120 decal set is different from a 2015 set. The catalog shows every decal with its symbol, its location on the lift, and the exact Genie part number. Page 10 covers decals with symbols for the S-120, and page 12 does the same for the S-125. Replace the wrong decal and you may obscure a safety warning. The manual keeps that from happening.

Why Factory Parts Catalogs Beat Aftermarket

Aftermarket parts catalogs often combine multiple years into one drawing, which means you get a blob of part numbers that may or may not fit your specific lift. I have chased a wrong part number for three hours because an aftermarket site listed a part that was superseded in 2011. The Genie factory catalog is revised with each update – Rev A3, April 2012. It is the same document the Genie dealer uses. If you want to be sure your order is right, you use the same document. For related machines, check the Genie S-120 S-125 2017 Parts Catalog for later years, or the Genie S-60, S-65 2012 Parts Catalog – Factory OEM Manual and Genie S-80, S-85 2012 Parts Catalog – OEM Factory Parts Manual for other boom models. For a broader understanding of how construction equipment documentation fits into the Automotive Industry Overview, this is the kind of exact specification that keeps machines safe.

Does this catalog include torque specifications for bolts?

No. This is a parts catalog, not a service manual. Torque values are found in the separate service manual.

What serial numbers are covered?

S-120 from S12011D-101 and S-125 from S12511D-101. Check your chassis plate before ordering.

Can I use this catalog for a Genie S-60 or S-80?

No. The S-120/S-125 chassis, axle, and drive components are different. Use the dedicated parts catalog for your model. The Automotive Industry Overview explains why model-specific documentation is critical – one part number mistake on a boom lift can cause a structural failure. Use the right manual for the right machine.

Is this a service manual or a parts catalog?

It is a parts catalog. It lists every replaceable part with its number, so you can order the correct piece. For repair procedures, you need the separate service manual.

You have the serial number, you have the part number, and you have a machine that needs to get back to work. Do not rely on a screenshot from a forum. Get the official Genie documentation and order the right part the first time. Access the Factory Manual.