In the Case CX31B the 88 mm Yanmar three-cylinder is rated at 23.1 hp @ 2400 rpm (net). We supply that engine in mechanical injection and in electronic common rail, new surplus and rebuilt, built to suit the mini excavator.
The Case CX31B is a 3-ton class mini excavator built for utility, landscaping and residential work in the US market. Net power in this application is approximately 23.1 hp at 2400 rpm - the machine's rated operating speed, not the engine's 3000 rpm maximum. The CX31B is a direct 3TNV88 application and a strong candidate for engine replacement rather than full rebuild.
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. Production years: 2011-2018. Rated output in this machine: approximately 23.1 hp @ 2400 rpm (net).
WHAT WE FIT TO YOUR MACHINE.
On a mini excavator the core engine is only half the job. The bellhousing and flywheel have to mate to your hydraulic pump drive, the oil pan has to clear the undercarriage, and the throttle has to answer to the machine's engine control. Those are all external parts and they carry across from the engine you are pulling out - we build the core to suit.
MECHANICAL