The Gehl SL3635 drives its hydrostatic pumps straight off the 88 mm Yanmar three-cylinder. We stock that engine in mechanical and in common rail, new surplus and rebuilt, and set the core up to your machine.
The Gehl SL3635 is a radial-lift skid steer loader built in West Bend, Wisconsin, rated at roughly 1,050 lb operating capacity and about 4,400 lb operating weight. Gehl's own factory engine parts manuals (917105C and 917329) document the Yanmar 88 mm-bore 3-cylinder in this frame, with the earlier 3TNE88 in first-generation builds and the 3TNV88 thereafter. The SL3635 is one of the highest-volume Yanmar 88 mm applications in the United States and remains common in landscaping, rental and light construction fleets. Note that Gehl later offered an HPCR (common rail) version of this platform, so the fuel system must be confirmed from the data plate.
ENGINE SPECIFICATION. Three cylinder, four cycle, liquid cooled, vertical in-line. Direct injection, naturally aspirated. Bore and stroke 88 x 90 mm. Displacement 1.642 L (100.2 cu in). Around 36 hp at 3000 rpm at full speed, less in machines governed lower. Dry weight approximately 341 lb (154 kg). Rotation counterclockwise viewed from the flywheel end. Engine as fitted to this machine: 3TNV88-BKMS / 3TNE88. Production years: approx. 2000-2006. Rated output in this machine: approximately 36 hp @ 3000 rpm.
WHAT WE FIT TO YOUR MACHINE.
On a skid steer the engine sits transversely behind the operator, driving the hydrostatic pumps directly. The bellhousing, pump coupler, oil pan and cooling package all have to match the machine - they are external parts and they come across from the engine you are replacing.
MECHANICAL OR COMMON RAIL - THIS IS THE ONE THING YOU MUST MATCH.
The Yanmar 3TNV88 comes in two fuel systems and they are not interchangeable. MECHANICAL INJECTION uses a mechanical pump and governor, with no ECU or sensors - this is what most machines in the field run, and it is our standard stock. ELECTRONIC COMMON RAIL (HPCR) is ECU-controlled, fitted to machines built to the later emissions standards. We carry both, in new surplus and rebuilt.
The suffix on your data plate - codes like -BKMS, -BPTB2, -QTB - does not mean a different engine. The core is the same across the family: same block, same crank, same 88 x 90 mm bore and stroke, same 1.642 L. The suffix tells you the fuel system and the accessory package. The accessories are external and swap; the fuel system is what has to match.
Two other variants to know about: the 3TNV88F has an ELECTRONIC GOVERNOR with EGR and is a different engine again, and the 3TNV88-GGE is a fixed-speed GENERATOR engine, not a machine engine. There is also a 4-CYLINDER 4TNV88 that is not the same as this three-cylinder engine at all.
Full breakdown of every variant, and how to read your data plate: see our Yanmar 3TNV88 engine buying guide.
TALK TO US FIRST.
The fastest way to get the right engine for a Gehl SL3635 is to send us the data plate and tell us the machine. We confirm bore, cylinder count and fuel system, set the core up with the accessories your machine needs, and quote you. Mechanical and common rail, new surplus and rebuilt.