Yes, we are here!

In times like these our hobbies become lifesavers. At GAS ENGINE MAGAZINE and FARM COLLECTOR, we have been tracking down the most interesting and rare vintage farm machines and collections for more than 80 years combined! That includes researching and sourcing the best books on collectibles available anywhere. Our online store is open and we are here to answer any questions you might have. Our customer service staff is available Monday through Friday from 8a.m.-5p.m. CDT. We can be reached at 1-800-888-9098 or by email. Stay safe!

1902 20 HP Klein Model 3

This 20 HP Klein Model 3 and VTPP pump, manufactured by National Transit Co., are on display at the Coolspring Power Museum.

| June/July 2014

  • The 1902 20 HP Klein Model 3 engine features a cylinder head cast integrally with the cylinder sleeve and a complex governer.
    Photo by Gas Engine Magazine Staff
  • A National Transit 3-1/2 by 8 VTPP pump.
    Photo by Gas Engine Magazine Staff

Manufacturer: National Transit Co., Oil City, Pa.
Year: 1902
Serial No.: 317
HP: 20
Bore: 10-inch
Stroke: 18-inch
Ignition: Spark plug
Governing: Throttle

The 20 HP Klein Model 3 is extremely heavy duty, with heavy crankshafts, bases and connecting rods. Even though this is a 4-cycle engine, the piston, which is very short, is cross-head guided so that none of the connecting rod side thrust bears against the piston itself. The belt drive oiler is also British or European in design. In the oiler, the reservoir is filled, and as the shaft turns on a belt connected to the engine crankshaft there are small wires that dip into the oil, pick it up and wipe it off on posts. The oil drips from each post into a hole and into pipes that go to each of the bearings. On this engine, those pipes are not present.

The engine has a long frame and a large cylinder head, and in this design the cylinder head was cast integrally with the cylinder sleeve. “When you remove the four nuts at the top of the cylinder head and pull the piece off, you find that the gasket is only the water jacket and that the cylinder, which extends back, comes out with the head,” Clark Colby says.

The exhaust valve is mounted in its own chest in the cylinder head. Klein didn’t like having the valve spring near the hot exhaust valve, so the exhaust valve spring is at the other end of the rocker arm, and it’s a tension spring rather than a compression spring. Klein’s designs often used a face cam to operate the valve.

The pump that is belted to the Model 3 Klein was also built by National Transit Co. and is noted as a 3-1/2 by 8 VTPP. The “3-1/2” refers to the diameter of the plungers in inches, the “8” refers to the length of the stroke in inches, the “V” refers to the vertical pump, the “T” refers to the pump being a triplex, meaning that it has three inverted cylinders, and the “PP” means it’s a high-pressure pump used to discharge the oil from a pipeline station and transport it over some distance of miles to the next receiving station.

Learn more about this engine and 38 others in Coolspring: Discovering America’s Finest Antique Engine Museum and see them run on the Coolspring Museum DVD.


Gas Engine Magazine A_M 16Gas Engine Magazine is your best source for tractor and stationary gas engine information.  Subscribe and connect with more than 23,000 other gas engine collectors and build your knowledge, share your passion and search for parts, in the publication written by and for gas engine enthusiasts! Gas Engine Magazine brings you: restoration stories, company histories, and technical advice. Plus our Flywheel Forum column helps answer your engine inquiries!

Facebook YouTube


click me