Komatsu Galeo PC800-8 Shop Manual page 150

SEN00383-03
Function
• The rotation and torque of the engine are trans-
mitted to the shaft of this pump and converted
into hydraulic energy in this pump. This pump
discharges the pressurized oil according to the
load.
• The discharge of this pump can be changed by
changing the swash plate angle in it.
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10 Structure, function and maintenance standard
Structure
• Cylinder block (7) is supported on shaft (1)
through spline a. Shaft (1) is supported by the
front and rear bearings.
• The end of piston (6) has a spherical hollow
which is combined with shoe (5). Piston (6) and
shoe (5) form a spherical bearing.
• Rocker cam (4) has plane A. Shoe (5) is kept
pressed against plane A and slid circularly.
Rocker cam (4) slides around ball (11).
• Piston (6) in each cylinder of cylinder block (7)
moves relatively in the axial direction.
• Cylinder block (7) rotates relatively against valve
plate (8), sealing the pressurized oil, and the hy-
draulic balance is maintained properly.
• The oil in each cylinder of cylinder block (7) can
be sucked and discharged through valve plate
(8).
PC800, 850-8