A manually applied installation tool, for setting fasteners by applying a relative axial pulling force thereto and including a first hydraulic piston in a first hydraulic cylinder for reciprocation in response to a preselected high hydraulic pressure for applying the relative axial pulling force, a second hydraulic piston in a second hydraulic cylinder for reciprocation between compressive and non-compressive directions for providing hydraulic fluid at the high hydraulic pressure to the first hydraulic cylinder for application of the axial pulling force by the first hydraulic piston, a fluid reservoir having a supply of hydraulic fluid for compression by the second hydraulic piston and flow to the first hydraulic cylinder through an access valve, a high pressure relief valve connected to the second hydraulic cylinder and actuable to relieve the fluid pressure at a preselected high magnitude with flow of hydraulic fluid back to the fluid reservoir. The installation tool including a refill valve operable for permitting flow of hydraulic fluid from the fluid reservoir into the second hydraulic cylinder upon reciprocating movement of the second hydraulic piston in a non-compressive direction and with the pressure relief valve, refill valve and access valve being substantially axially in line with the second hydraulic piston along its axis of reciprocation.