OTC Tools OTC 4008 Dual Master 2 Speed Hand Pump. OTC Tools. These fast-acting, two-stage pumps not only handle high force, high pressure requirements up to 10000 PSI, but deliver extremely high volume at low pressure to quickly move the ram piston to and from the work. Pumps have a built-in relief valve, pre-set at the factory for 10000 PSI. Maximum handle effort is 90 lbs. Two basic dualmaster models are for use with double-acting rams. Specifications: 2-Gallon reservoir with legs. 200 PSI maximum pressure at first stage. 10000 PSI maximum pressure at second stage. 2-1/2 Inch piston diameter at first stage. 1/2 Inch piston diameter at second stage. 1-1/2 Inch piston stroke. 460 cu. in. usable reservoir capacity. 3/8 Inch NPTF oil port. Email for product availability.