Design
Series 90 pump cross-section
P106 648E
Slider block
Servo piston
Servo arm
Displacement control
Cradle bearing
Charge pump
Swashplate
Cradle guide
Feedback linkage
Roller bearing
Shaft
Piston
Slipper
Valve plate
Cylinder block
Input shaft
Rear
bushing
Bushing
seal
Typical name plate
Model-No./Ident-No.
Model Code
Serial-No.
Made in USA
Place of Manufacture
Model
Number
Serial
Number
Model
Code
A - 88 - 126 - 67890
501829
P108494E
90L055 KA 1 N
6 S 3 C6 C 03
NNN 35 35 24
Series 90 pumps are also manufactured in Europe and China. Place of manufacture shown on nameplate
will correspond with the actual place of manufacture.
Pictorial Circuit Diagram
This configuration shows a hydrostatic transmission using a Series 90 axial piston variable displacement
pump and a Series 90 fixed displacement motor.
Technical Information
Series 90 Axial Piston Pumps
General Description
6
520L0603 • Rev 0804 • March 2016