Description

Yale GP, GTP, GDP, 20AK, 25 Parts Catalog – Factory Part Numbers You Can Trust

If you’ve ever ordered a hydraulic spool for a Yale GP and got a box with a different thread pitch, you know the headache. Aftermarket catalogs flip part numbers, merge supersessions without dates, and leave you holding a $400 paperweight. This Yale GP, GTP, GDP, 20AK, 25 Parts Catalog is the factory original – 169 pages of genuine part numbers, reference codes, and assembly drawings that match what Yale stamped on your truck. No translation errors, no “equivalent” guesswork.

Right Hand and Left Hand: Orientation Matters

The catalog beats this into your head on page 2: “Right hand” and “left hand” are determined relative to the forward motion of the forklift. I’ve seen guys flip a brake backing plate because they assumed driver side meant left. This manual draws each part with that rule baked in. If you’re rebuilding a GDP30, you reference the same orientation the factory used on the line. The code system (like 13-S-108) links the drawing number to the parts list – no flipping back and forth to figure out what exploded view matches which part.

How to Order Service Parts – It’s Not Just a Part Number

Page 1 spells it out: you give serial number, part number, part name, and quantity. Forks? You better know the lift height code. This catalog marks parts with AR (as required) and asterisks for maximum usage on an assembly. If you order six of something that only takes four, don’t blame the manual. The “Numerical Parts Index” section cross-references every part number in the book – start there when you have a sticker on a cracked cylinder but no name. Related manual: Yale Detailed of Spare Parts Index covers the same indexing logic for earlier models.

7 Systems Covered in the Parts Breakdown

Let’s be specific. This isn’t a “general” catalog. It breaks down the GP/GTP/GLP/GDP15,18,20AK,20,25,30,35RK/TK models into these system groups: engine and cooling, transmission, drive axle, steering, mast and carriage, hydraulics, and electrical. Each section uses the same code-and-reference-number system so you can jump between drawings without relearning the layout. The “Exchange of Parts” part near the end explains when a part supersedes with no interchangeability – critical if you’re rebuilding a 20AK that’s had updates. Compare that with aftermarket PDFs that just list an updated number without the serial range. Related: Yale Detailed of Spare Parts GP/GTP/GLP/GDP/GD gives the same treatment for the GD family.

Abbreviations You Need to Know Before Ordering

The catalog shows abbreviations like 2-LFL (2-Stage Limited Free Lift) and O.A.H. (Over All Height). If you call a dealer and say “I need a mast chain for a 3-FFL,” they know exactly what you mean. Page 2 lists every abbreviation used in the remarks column – including SEE LINK and SEE TABLE for specification pages. Don’t skip this page. I’ve watched a tech order a cylinder for a 2-stage mast when the truck had 3-stage full free lift because he didn’t read the code. The manual gives you the language so you talk parts counter correctly. Related: Yale Detailed of Spare Parts GP/GTP/GLP/GDP Series covers series-specific nuance for earlier builds.

Does This Catalog Replace a Service Manual?

No. This is a parts catalog – it tells you what to buy, not how to install it. You still need the factory service manual for torque values and adjustment procedures. But you can’t order the right part without the right part number, and aftermarket “cross-reference” lists get it wrong on Yale trucks more often than they get it right. If you need repair procedures, look at Automotive Industry Overview for context on factory documentation standards, but for parts ordering, this catalog is the source. Automotive Industry Overview also explains why OEM manuals use consistent part numbering across model years.

How do I find a part number if I don’t know the name?

Use the Numerical Parts Index at the back of the catalog. That section lists every part number in numerical order with a page reference. Start there.

What does “AR” mean in the quantity column?

AR means “as required” – the quantity varies per truck. The number listed with an asterisk is the maximum. If you order fewer, it’s your call, but the manual flags the upper limit so you don’t over-order.

Can I use this catalog for a Yale model from 1985 that isn’t listed?

This catalog covers GP/GTP/GLP/GDP series models with load capacities 15 through 35. If your truck is older than the serial break points covered in the “Exchange of Parts” notes, the part numbers may have changed. Check the supersession table on pages 162–164 before ordering.

Why do you say aftermarket catalogs are unreliable for Yale?

Because Yale uses a part-numbering system that includes suffix codes for design changes. Aftermarket reprints often drop those suffixes, or worse, they merge superseded numbers without updating the reference code. You end up with a part that fits a different mast height or a different engine variant. This catalog prints the code, the description with minimum specs (like thread size or length), and the exact application column. There’s no guesswork if you read the line.

You don’t have time to argue with parts counters or return mis-shipped components. The factory catalog ends that cycle. 169 pages of part numbers, reference codes, and exchange notes – all straight from Yale’s engineering files. Access the Factory Manual and keep it on your bench next to your laptop. When the mast won’t lift and you need a pump piston, you’ll have the right number the first time.