ARO 650940-CDD-B Hydraulic Piston Pump, 6 in Stroke

The ARO 650940-CDD-B is a positive displacement piston pump powered by a hydraulic motor rather than compressed air. A 6 in stroke drives the lower pump end, model 66941-XXD, which draws through a 2 in NPTF inlet and discharges through a 1-1/4 in NPTF outlet. Packing-style seals in EHMW-PE (extended high molecular weight polyethylene) seal the moving piston rod.

Maximum delivery is 12.9 gpm (48.8 lpm). As with any reciprocating piston pump, each stroke moves a fixed volume, so output rises and falls with the speed of the hydraulic motor. When the packings wear, the lower end is rebuilt with repair kit 637211-XX3; select the material code that matches your pump.

Key Specifications

• Drive: hydraulic motor
• Stroke length: 6 in
• Inlet: 2 in NPTF; outlet: 1-1/4 in NPTF
• Max flow: 12.9 gpm (48.8 lpm)
• Seals: EHMW-PE packings
• Type: positive displacement
• Lower pump end: 66941-XXD; repair kit: 637211-XX3

Typical Applications

• Sites or vehicles that already run a hydraulic power supply
• Locations where a compressed air supply is limited or unavailable
• Bulk transfer through a large 2 in suction line
• Fixed floor installations using the matching mounting kit

Service Parts for This Pump

Three accessory items are listed against the 650940-CDD-B. Choose the 65138 floor mounting kit when the pump will be bolted down in one place.

• ARO 67136 adapter kit assembly
• ARO 65138 floor mounting kit
• ARO 66333-B Wet-Sol, quart

Wear parts for the fluid section come in the lower pump repair kit noted above. Service instructions for this model are in its Operator's Manual.