Gear Box – B31 (PA)

The PA B31 is a reduction gearbox that couples a petrol engine straight to a 1,450 rpm triplex pump. It bolts to the engine flange, takes the pump on the other side and drops engine speed to pump speed, with no belts or pulleys to tension or guard.

Specifications / Features:

• Brand: PA
• Model: B31
• Reduction Ratio: 2.176:1 (3,100 rpm in, 1,425 rpm out)
• Engine Shaft: 1-1/8" (28.6 mm) hollow, 6.4 mm keyway
• Engine Flange: SAE J609b
• Pump Shaft: 24 mm
• Maximum Power: 31 HP (23 kW)
• Oil: SAE 90 gear oil, 0.35 L
• Construction: Aluminium case, hardened steel helical gears in an oil bath
• Weight: 3.95 kg

Benefits:

• Direct, compact drive with no belts to slip, tension or guard
• Runs the pump at its rated speed for longer pump life
• Suits 24 mm shaft pumps from Comet, Interpump, Annovi Reverberi, Bertolini, Hawk, Udor and Leuco
• Sight glass makes oil checks easy
• Before first use, fill with 0.35 L of SAE 90 gear oil to the centre of the sight glass