Description

Yale GLP20, GDP20, GDP25, GDP30, GLP25 2004 Parts Catalog

If you’re slapping a Chinese-made aftermarket water pump on a Yale GDP30 because some eBay listing said it ‘fits,’ you’re asking for a comeback job. I’ve seen it a hundred times. The bolt holes are off by half a millimeter, and then you’re chasing a coolant leak on a Friday afternoon. That’s why you need this Yale GLP20, GDP20, GDP25, GDP30, GLP25 2004 Parts Catalog — the OEM document that tells you exactly what part numbers Yale stamped into the chassis from the factory, not some guesswork from a third-party reprint.

This thing is 892 pages of factory-approved part numbers, exploded diagrams, and updated bulletins. It covers the A875 series — the GLP20 and GLP25 LPG models, plus the GDP20, GDP25, and GDP30 diesel variants. Every engine option is broken out: 2.0L, 2.2L, 2.5L, and 3.0L, both LPG and diesel. The manual came out of Yale Europe in 2004, and it’s the same book the dealer parts counter has behind the desk. Miss a supersession number, and you’ll order a bracket that doesn’t match the chassis build date. The factory manual cross-references by serial number ranges like S/N A875B-7838 and A875B-7839, so you get the right part for the right build phase.

17 Sections — Not 18, Not 16

The catalog divides into exactly 17 sections. Section 1 covers the general truck — frame, floor plates, hood, side doors, counterweight, seats (including the undamped SEARS seat and the fully sprung versions with date codes). Section 2 goes into the diesel engine (2.5 and 3.0L) with parts for the exhaust, soot separator, radiator and hoses for both powershift and hydrostatic transmissions. Section 3 handles the 2.0L and 2.2L LPG engines (FE/F2 models), including the low-emission exhaust and the 2-way catalytic converter. Section 4 is the 3.0L LPG engine — they even broke out crankshaft and piston parts by motor series: 1998-2001, 2002-2003, and the 2004 motor series starting at S/N A875B-24475A. That level of detail is what keeps a technician from ordering a piston that’s 0.5mm too tall.

Section 5 is the fuel system — liquid propane tanks, closed-loop vs. open-loop regulators, throttle body and LPG mixer for the 3.0L low-emissions system. Sections 6 through 10 cover electrical, transmission, steering, brakes, hydraulic system. Sections 11 through 13 are the mast groups: two-stage limited free lift, three-stage full free lift, two-stage full free lift. Section 14 covers fork installation, load backrest, and mast mounting. Section 15 lists options, Section 16 is the part number index, and Section 17 has customer information. That’s right — a part number index that runs 50+ pages, so you can find that obscure bushing without flipping through every diagram.

3 Reasons OEM Documentation Trumps Aftermarket Copies

First, aftermarket parts catalogs often copy the first printing and miss the engineering changes. Yale issued multiple revisions within 2004 for the LPG 3.0L engine — the crankshaft and piston assembly changed between 1998-2001 and 2002-2003 motor series. The factory catalog shows these updates with specific serial number breakpoints. Second, the diagram quality. This catalog uses clean line drawings with callouts that match the part number lists — no fuzzy JPEGs from a scan of a scan. Third, the part numbers themselves. Aftermarket catalogs often substitute ‘equivalent’ numbers that don’t carry the same load rating. Seen a lift truck lose a mast chain because someone used a generic roller chain? I have.

You want to see what a real parts catalog looks like? Grab the Yale GLP/GDP20-30RF/TF parts catalog and compare it to the aftermarket junk on Amazon. The difference is night and day. Related catalogs in the same family: Yale GLP/GDP16-20AF/BF 2007 Parts Catalog covers the smaller chassis; Yale GDP/GLP20-30 Forklift 2006 Parts Catalog adds another year of revisions; and Yale GDP/GLP20-30 Parts Catalog 2006 – Section: User Support Information gives you the technical support pages from a later edition.

Does This Manual Cover the Fuel System Properly?

Section 5 is dedicated to the fuel system — both LPG and diesel. For LPG, it covers the tank, the regulator (open-loop and closed-loop), throttle body and mixer for the 3.0L low-emissions variant. For diesel, Section 2 includes the fuel system for XA/HA engines with injection pumps, nozzle holders, and filters. If you’re retrofitting a closed-loop LPG system onto an older open-loop truck, you need the serial number ranges and the part numbers for the different mixer plates — this catalog has them. The page count for Section 5 runs about 60 pages, including three different versions of the LPG fuel system depending on build date and emission levels.

What About the Transmission Parts?

Section 7 covers the transmission — both powershift and hydrostatic. The catalog includes the flywheel and torque converter assemblies from the engine sections (e.g., “SCHWUNGSCHEIBE UND DREHMOMENTWANDLER XA/HA”). You get separate callouts for the transmission itself, oil cooler lines, and the mounting brackets. If your GDP25 has a powershift transmission with serial number A875B-7838, you need the radiator and hose assemblies listed in the engine section, not the ones for A875B-7839. The catalog makes that distinction clear.

How to Find a Part Number Fast

Use the index in Section 16 — it’s an alphabetic listing of every part number in the catalog. But don’t skip the exploded diagrams. Each diagram has a figure number and a table beneath it with part number, description, and quantity. For example, if you need the counterweight bolts, look in Section 1 under “Kontergewicht” (counterweight). The diagram shows the bolt locations and the part numbers. No guesswork. And because this is the OEM catalog, the bolt grade and thread pitch are specified — not just “M12 bolt” but the exact Yale part number that matches the original fastener. Use that when you order from the dealer, and the counter guy will stop asking you “Are you sure that’s the right one?”

Need a deeper technical dive? Read the Automotive Industry Overview on forklift manufacturing standards, or check Automotive Industry Overview for general context. But for specific Yale part numbers, stick with the factory book.

FAQ: Four Questions You’ll Ask

Is this manual in English?

The book is printed in German, but part numbers and diagrams are universal. The English model codes (GLP20, GDP20, etc.) are identical. You don’t need to read German to use the exploded views and callouts.

What if my serial number falls between the ranges listed?

Use the higher serial number range. Yale often made running changes mid-month. The catalog provides both endpoints, and the part that superseded the earlier one is usually the later number. Call a dealer with the serial number to confirm.

Can I print this PDF?

Yes, the file is a standard PDF. You can print individual pages or the whole 892-page catalog. Keep a copy in the shop tablet and a printout in the binder for when the tablet battery dies.

Does this include the service procedures?

No, this is a parts catalog, not a service manual. It shows exploded views and part numbers. For repair steps, torque specs, and adjustment procedures, you need the separate service manual. But if you only need to order the correct water pump or gasket, this catalog is what you bring to the parts counter.

Stop burning billable hours with wrong part numbers. Access the Factory Manual now and get the exact OEM part data for your Yale GLP20, GDP20, GDP25, GDP30, or GLP25. Your Saturday afternoons will thank you.