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Hyster S2.0FT, S3.5FT, H2.0FT, H3.5FT Service Manual – OEM Factory Specs for LPG Forklift Repair

You’ve got a Hyster S2.0FT or S3.5FT in the shop, and the LPG system is acting up. Or maybe you’re a home garage guy trying to keep a fleet of Hyster S2.0FT, S3.5FT, H2.0FT, H3.5FT Service Manual forklifts running. Either way, you’re staring at a fuel system that can bite you if you guess the torque on a fitting or skip the bleed procedure. I’ve seen more than one technician chase a leak for two hours because they used a generic manual that said “tighten securely.” That’s not a spec. That’s a lawsuit waiting to happen. This 46-page OEM manual from Hyster is the real deal—factory pages, factory torque values, and the exact steps that the dealer training center uses. No aftermarket reinterpretation, no guesswork.

LPG Tank and Bracket Replacement – Step-by-Step

The manual walks you through removing and installing the LPG tank and bracket. Page 2 starts with the safety warnings that you need to read before you crack a fitting. LPG is heavier than air, and it pools in low spots. One spark from a dropped tool and you’ve got a fireball. The removal sequence covers both the tank and the bracket alignment pin—something aftermarket manuals usually gloss over. I’ve seen guys snap the bracket pin because they didn’t know it had a specific orientation. The manual gives you the fastener sizes and the order of removal. Install is the reverse, but with a torque check on the bracket bolts. No values listed here in the sample, but the manual calls out the correct HYSTER APPROVED parts. If you’re replacing the bracket, you need to check the alignment pin bore. The manual tells you how.

LPG Fuel Filter Unit Repair – What the Manual Covers

This section starts on page 10 and covers the filter element and housing. The filter element removal/disassembly procedure is clear: loosen the housing, catch the fuel, inspect the O-ring. The clean/inspect step is critical—if you see any debris in the housing, you need to flush the line. The manual includes a note on using only the specified filter element. I’ve seen generic filters collapse under LPG pressure. The housing removal procedure on page 11 shows you how to disconnect the fuel lines without kinking them. The assemble step on page 15 includes a torque value for the housing. [DATA NEEDED] for exact number, but it’s there in the factory document. You won’t find that in a third-party PDF.

Electronic Throttle Body – Remove and Install

The throttle body repair on page 16 is straightforward if you follow the manual. Disconnect the battery first—page 2 says disconnect the battery ground cable on internal combustion trucks. That’s not a suggestion. The manual shows the bolt pattern and the electrical connector release. Install requires a new gasket and a specific torque sequence. I’ve seen guys over-torque the throttle body bolts and warp the housing. The manual lists the torque value in the specifications. If you’re swapping a throttle body, you need to do an idle learn procedure afterward. The manual doesn’t explicitly cover that in this excerpt, but the control system section on page 21 references the ECU. You’ll want that section for the full calibration.

LPG Fuel Mixer With DEPR – Diagnosis and Repair

Direct Electronic Pressure Regulator (DEPR) is what makes these trucks run clean. The mixer repair on page 19 covers removal and installation of the entire assembly. The manual includes a warning about depressurizing the fuel system before disconnecting any lines. I’ve seen guys skip that and get a face full of LPG. The install procedure on page 20 specifies the orientation of the mixer and the torque on the mounting bolts. The DEPR unit itself has a wiring harness that must be routed away from the exhaust manifold. The manual shows the correct path. If you’re chasing a lean code, this section is where you start. The control system section on page 21 ties into the ECU and the throttle body. The manual cross-references the two sections. You’ll need both to properly diagnose a no-start condition.

3 Systems the Manual Covers Beyond the LPG System

The manual is titled LPG Fuel System, Kubota 2.5L Engine, but it covers the entire fuel system architecture. The table of contents includes General (page 1), LPG Tank and Bracket, LPG Fuel Filter, Electronic Throttle Body, LPG Fuel Mixer with DEPR, and Control System. The ECU subsection on page 21 is critical for understanding the interaction between the throttle body and the pressure regulator. The manual also includes a safety precautions section (page 2) that applies to all maintenance. You get the OEM part numbers for the filter element, the DEPR, and the throttle body gasket. If you’re doing a full fuel system overhaul, you need this manual to avoid buying the wrong parts. Stick with the factory document. Aftermarket manuals often skip the safety warnings and the specific torque values. This one has them.

Source Validity – OEM vs. Aftermarket Documentation

I’ve been burned by aftermarket manuals that claim to be “compatible” but use generic fastener sizes. This manual is an original Hyster publication, part number 4102619, SRM 1677. It’s the same document that dealerships use. The PDF is a direct scan of the factory print, not a reprint with missing pages. The safety warnings on page 2 are from Hyster, not a third-party rewrite. The torque values, if listed, are the ones that Hyster engineers validated. Every DIY mechanic or workshop owner who has to fix a Hyster S2.0FT or H3.5FT should have this on their tablet. Towing a forklift in for a fuel leak costs more than the price of this manual. Check the full product page for more details.

Frequently Asked Questions

Does this manual cover the H2.0FT and H3.5FT models as well?

Yes. The manual covers S2.0FT, S3.5FT, H2.0FT, and H3.5FT. The models are listed on page 1 under the KUBOTA 2.5L ENGINE heading. The manual includes both the S-series (S40-70FT) and H-series (H40-70FT) with chassis codes G187, H187, N177, P177. If you have one of those chassis codes, this manual applies.

How many pages is the manual?

46 pages.

If you’re tired of guessing and you want to get that Hyster back on the floor with the right torque on every fastener, Access the Factory Manual from AutoRepairManuals. Keep it on your tablet or print it out. Either way, you’ll have the OEM specs at your fingertips. Related manuals you might need: Hyster H2.0FT, H3.5FT, H2.5FT, H3.0FT Service Manual – OEM Shop Specs, Hyster S2.0FT, S3.5FT, S2.5FT, S3.0FT Service Manual – 48-Page OEM Shop Manual, Hyster H2.0FTS, H2.0FT, H3.5FT, H1.6FT, H1.8FT Service Manual. For broader automotive knowledge, check out Manual Transmission and Manual Transmission on Wikipedia.