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PA. B31 Gearbox w/ 1"1/8 in - 30 mm Shafts




These gearboxes work with select high pressure pumps with 30mm shaft and machined shaft plates and connect directly to gas engines with 1"1/8 shafts.

Reduction Ratio: 2.176 : 1
Engine Shaft: 1″1/8
Pump Shaft: 30mm
Fits to Engine: 24-31 HP
Oil Type: SAE 90/80W90
Oil capacity 0,35 l - 10 oz
MPN: 50.0071.30

Compatible Pump Brands: AR, Bertolini, Comet, Interpump, Leuco, Hawk, Udor (contact P.A. SpA directecly for exact match)

Caution: For correct use check the rotation speed of the engine and never exceed the max RPM rate indicated on the pump.

*The flange should be flush to engine when fully seated to avoid damage while tightening bolts. If not flush when fully seated on shaft, then spacers are required.

Additional Information

P.A. SpA Contact Form (Compatibility)

User Manual (Parts Breakdown)

Extra Information