Parker Hannin Corporation
Hydraulic Pump and Power Systems Division
Marysville, Ohio USA
Bulletin HY28-2708-02/SVC/EN | July 2019
Medium Pressure Axial Piston Pumps
P1/PD B-mod Service Information
3
B-Mod Pump Identification
This service manual is to be used for P1/PD Design Series B (B-mod) pumps.
In order to identify which series of pump you have, please refer to the Series
Designation spot in the P1/PD model code as shown below.
"U" Universal Designation
The design series is based on the type of control selected. B-mod pumps use
the C, L, and AM controls. All other control types are Design Series A (A-mod).
There are however two exceptions. Both exceptions are on the 45 & 60cc pumps.
One exception is when the load sense (L) or remote compensator (AM) is used
in combination with the torque limiting control (ALT or AMT). The ALT or AMT on
the 45 & 60cc pumps is still the A-mod design series. The other exception is if
the Universal “U” conguration model code option is selected with the 45 or 60cc
pump. On those two displacements, the Universal “U” option is also still an A-mod
design series.
For service information on A-mod pumps please refer to
Bulletin HY28-2665-02/SVC/EN. The latest edition can be found at
www.parker.com/HPS.
NOTE: A-mod and B-mod controls are NOT Interchangeable! Adapter block
is required to put a B-mod control on an A-mod or an A-mod control on a
B-mod pump. See Parts Kits page for adapter block part numbers.
Design Series Designation
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