Komatsu PC500LC-10R Shop Manual page 204

COMPONENT PARTS OF HYDRAULIC SYSTEM
Sectional view (description of part names)
A: Rocker cam plane
a: Spline
1: Front shaft
2: Cradle
3: Front case
4: Rocker cam
5: Shoe
6: Piston
7: Cylinder block
10-110
10 STRUCTURE AND FUNCTION
B: Cylindrical surface
8: Valve plate
9: End cap
10: Rear shaft
11: Rear case
12: PC valve
13: Servo piston
14: Slider
PC500LC-10R