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Multiple pump drive range from JBJ Techniques

19 May 2016

The multiple pump drive range of equipment from JBJ Techniques allows a single or a multiple of pumps to be driven from a single prime mover.

Maximum input torques up to 5,600Nm can be accepted as standard whilst higher powers can be accommodated by the use of oil cooling.

All units can be supplied with either hydraulically or mechanically actuated clutch units. jbj Techniques can also offer specialist design and manufacture for multiple pump drive gearboxes outside of the standard range. 

Further information and specification catalogue can be found at


• The multiple pump drive range of equipment allows a single or multiple pumps to be driven from a single prime mover.
• Single pump drives allow a pump to be close coupled to a diesel engine that has a flywheel and flywheel housing in accordance with SAE standards (non standard can also be accommodated).
• Supplied in a kit format consisting of a bell housing fully machined to suit the particular pump mounting and a flexible coupling to suit the engine flywheel and particular pump shaft.
• Multiple pump drives allow two or more pumps to be driven from a single prime mover.
• Available in a number of mounting formats, sizes and increasing and decreasing speed ratios.
• All models may be close coupled directly to the prime mover (Model B) or may be fitted with an over-centre clutch (except AM 365 and AM 480) for close coupling (model BD) or for independent mounting (model BDS).

The multiple pump drive units are constructed from:-

• Cast iron casings.
• Straight tooth gears case hardened and ground, shaved on AM216, AM320, AM220, AM330 series.
• Ball bearings.
• Case hardened shafts.
• Viton seals on input shafts.

The input shaft is splined to the primary drive gear which transmits the drive to the secondary gear on whose axis drives the pump. The direction of rotation is therefore opposite from input to output.

Technical data

• Ratio - Represents the ratio between the input speed (prime mover) and output speed (pumps). Ratios lower than one indicate the unit acting as a speed increaser and higher than one acting as a speed reducer. Note the output ratio is identical on all outputs ports of the same unit.
• Maximum input torque M1 (Nm) - is the maximum torque which can be transmitted by the input shaft to give a theoretical gear life (L10) of at least 5,000 hours. For units that are fitted with a clutch or a coupling the maximum input torque may be limited by the torque capacity of the clutch or coupling.
• Each output maximum torque M2 (Nm) - is the maximum torque that can be transmitted by each output port.
• Maximum speed N1 (RPM) - is the maximum speed of the input shaft.
• Moment of inertia J (Kg/m²) - is referred to the input shaft and is calculated in accordance with ISO standards. 

Further information regarding selection criteria, installation and on-line technical specification catalogue can be found at

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