11007657

The 11007657 axial piston pump is produced by Danfoss as part of the H1P Axial Piston Single Pumps series for closed-loop hydraulic drives. It supplies variable flow to propel or actuate mobile machinery. A geometric displacement of 165.1 cm³ per revolution fixes how much fluid the pistons deliver each shaft turn, allowing designers to size the prime mover accurately. Counterclockwise shaft rotation matches typical left-hand pump mounting and must be observed to maintain expected port orientation. The unit tolerates system demands up to 450 bar, while a high-pressure setting of 350 bar permits the control valve to regulate load pressure without triggering the main relief. Electronic feedback is powered by a 24 V control voltage so the pump’s displacement control module can position the swashplate precisely during automated duty cycles.

A dedicated charge pump built into the 11007657 moves 26 cm³ of makeup oil per revolution to replace leakage and maintain loop stability. Charge relief pressure is limited to 24 bar so excess flow returns to the reservoir instead of overstressing low-pressure components. The closed loop must stay above the minimum low-loop pressure of 10 bar to prevent cavitation at the main inlet. Internal case lubrication is rated for 3.0 bar continuous pressure and may rise to a maximum of 5.0 bar during transients without risking shaft seal failure. An orifice labeled A+b with a diameter of 1.3 mm meters pilot oil to damp control movement, improving response without oscillation.