RAM PAC Heavy Duty Air Pressure Hydraulic Foot Pump HAP-050 - 50 Ton Capacity. "New" RAM-PAC® heavy duty air/hydraulic pump saves time & effort in operations requiring plenty of power from a compact, portable package. Use with single-acting rams up to 50 Ton capacity 80 cu. Heavy duty construction with metal reservoir and pedal. Easily adapts to larger reservoirs (Consult Factory). Adjustable release detent to facilitate ram return. Operates on shop air (40 -125 PSI). Two-stage release mechanism - reduces shock on system while allowing fast or metered ram return. No need for ...