Description

Hyster S120, S80 Technical Manual – What You Get on the Bench

Twenty-eight years turning wrenches, and I still see guys pulling torque values from a forum. On a Hyster S80 or S120, that gets you a blown head gasket or a driveline that sounds like a bag of rocks. This Hyster S120, S80 Technical Manual is the factory-issued 16-page document that lays out exactly what the engineers intended. No guessing, no third-party reprints – just the OEM data.

Dimensions and Certification – Page 2

Page 2 of this Technical Manual gives you the S80FT dimensions straight from Hyster. Right-angle aisle widths, head clearance with different seat types, and the specific ANSI B56.1 certifications. If your customer wants to know if the truck will stack in a 42-inch aisle with a 48-inch load, this page has it. The chart shows H80FT, H100FT, and S120 models – but the S80 lift heights and turning radii are there too. You need the inside turning radius for a 90-degree stacking aisle? It’s 3.5 inches (90 mm). Don’t trust a spec that’s been photocopied four times. This is the factory print.

Specifications Breakdown – Page 3

Page 3 is where you find the real meat: model designation, rated capacity (8,000 lb at 24-inch load center), engine options, transmission type (DuraMatch electronic powershift), tire type (cushion), and step height. The S80FT uses a GM 4.3L engine – either LPG or gasoline. The S120 shares the same powertrain architecture, so the spec chart applies to both. If you’re chasing a performance issue, start here. The OEM torque values aren’t listed on this page, but the manual references the engineering standards that dictate them. You cross-check against the factory service manual for the specific engine, Hyster LPG Fuel System GM 4.3L Engine Manual or Hyster Gasoline Fuel System GM 4.3L Engine Manual.

Powertrain and Transmission: DuraMatch Details

The DuraMatch electronic powershift transmission is a common headache. This manual specifies the transmission type – DuraMatch or DuraMatch2 – for the S80FT and S120. If you’re swapping a transmission or troubleshooting shift issues, you need to know which version the truck left the factory with. The manual also covers the powertrain line items on the spec sheet (items 41-47). That includes the engine/power type and step height. For the actual overhaul procedure on a Manual Transmission, you’d pull the separate shop manual. But for identifying the correct parts and specs, this technical guide is your starting point.

7 Systems Covered in 16 Pages

Don’t let the page count fool you. Sixteen pages of dense OEM data beats 200 pages of aftermarket fluff. This Technical Manual covers dimensions, performance, weights, tires & wheels, powertrain, and certification – seven system categories. Each spec line is numbered (1-47) for quick reference. If you’re replacing tires, the S80FT takes cushion tires, 2 front and 2 rear. The wheelbase and tread dimensions are charted. You can verify the load center and rated capacity against ANSI standards. Need a related manual for the complete service history? Check Hyster H70-H135 Forklift Service Manual for the broader model family.

OEM vs Aftermarket: Why This Manual Matters

I’ve ripped apart aftermarket “technical” booklets that had wrong center distances and missing certification notes. This one is stamped Hyster. The certification on page 2 notes compliance with ANSI B56.1-1969 and OSHA section 1910.178(a)(2). That matters when a safety inspector walks in. The aftermarket reprints often crop those notes to save space. You lose the legal backbone of the truck’s design. The official Hyster S120, S80 Technical Manual preserves the full footnote about traction limits and dealer contact for special applications. That’s not fluff – that’s liability coverage.

Does this manual include torque specs for the head bolts?

No. This is a technical guide (spec sheet), not a service manual. It lists dimensions, capacities, and certifications. For engine torque values, you need the Hyster engine service manual for the GM 4.3L.

Will this work for a Hyster S80FT built after 2010?

Yes, with a caveat. The manual covers the S80FT and S120FT series, which includes later production years. However, Hyster updates specifications via technical bulletins. Always cross-check the serial number against the latest Hyster dealer information. The dimensions and powertrain data on page 3 remain valid for the standard configuration, but options like DuraMatch2 may have minor differences. If you’re ordering parts, verify the spec against your truck’s data tag. The manual’s inside turning radius (3.5”) and aisle width calculations are based on standard tires and mast configurations – aftermarket attachments will change those numbers.

For transmission internals, the separate Manual Transmission shop manual would be the next step. This technical guide gets you the base data.

Time is money on the shop floor. The Hyster factory technical manual gives you certified specs in 16 pages – no filler, no photocopy bleed-through. You can verify aisle widths, lift heights, and powertrain configurations without calling a dealer. Access the factory manual and keep a copy on your tablet or print it for the toolbox. Your next Hyster S80 or S120 job will go faster when you’re working from the OEM sheet.