This coupler transmits the power from the electric motor, gasoline engine, diesel engine, air motor or hydraulic motor to the 28mm shaft of a P400 series or SP series pump.  It directly couples the two keyed crankshafts together, so that as the driver crankshaft rotates, the pump crankshaft rotates at the same speed.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

  • Giant Industries Limited Warranty


U.S. Metric
P400 Pump Shaft Size 28 mm
Motor Frame size 182T/184T
Weight 2.25 lbs 1.0 kg


No repair kits available. To replace this item please contact Giant Customer Service.

Repair Kits Available

The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.