Parker P1/PD Series User Manual

Parker Hannin 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
53
Pump Test Procedure
Test criteria based on hydraulic oil ISO 32 per Parker HF-0 uid specications.
Operating speed: Do not exceed catalog ratings.
Maximum Case pressure: 2 bar (29 psi) absolute or 0.5 bar (7.5 psi) above inlet
pressure.
Minimum inlet pressure: 0.8 bar (11.6 psi) absolute.
Oil temperatures: 120 F +/- 10 F (50 C +/- 5C).
NOTE: Ensure that hydraulic system does not overheat during this test procedure.
1. Mount pump on test xture. Ensure that shaft alignment is within tolerance.
2. Fill pump case with clean oil. Connect uppermost case drain port to reservoir
with no restrictions in between. Insure other case drain ports are properly
plugged and torqued.
3. Connect inlet and outlet lines. Insure that lines are lled with oil. Refer to
the hydraulic schematic test circuit diagrams. For pumps with “L” controls,
connect a suitable pilot line from the “X” port on the pump control to the
outlet pressure line downstream of the non-compensating ow valve (#4), and
install a pressure gauge (#5) in the circuit that will read the pressure in that
pilot line as shown in Circuit #1. For pumps with “AM” controls, connect a
suitable pilot line from the “X” port on the control to a remote pressure relief
valve (#14), and install a pressure gauge (#13) in that line as shown in Circuit
#2.
CAUTION: Make sure a main system safety relief (#7) is installed in the
system between the pump outlet and ow control valve (#4).
4. Conrm direction of rotation for the pump and drive is correct.
5. Reduce the main compensator (Pmax) setting to minimum by turning the
Pmax adjustment screw counter-clockwise until the spring force is not felt.
For pumps with the “L” or “AM” controls, turn the differential adjustment
clockwise until it bottoms out and lock it into position.
6. Set the maximum volume stop (if applicable) to full displacement. If there is a
minimum volume stop back that adjustment all the way out so that the pump
can fully compensate.
7. Start the prime mover and if possible, gradually increase pump speed to 1800
rpm +/- 30 rpm with no load (no pressure on the system load relief valve #6).
8. While under no load, screw in the Pmax adjusting screw until it bottoms out.
9. Break in the pump at the time and pressures listed on the next page. Adjust
the load-relief valve to the pressure listed for the times indicated. After
break-in, loosen the Pmax adjustment screw lock nut and reduce the Pmax
setting to the desired setting by turning the Pmax adjustment screw counter-
clockwise until the pump pressure gauge reads the desired setting, and then
tighten the lock nut. Next, adjust the system load relief valve to below the
Pmax setting to cause the pump to come on stroke and then back above the
Pmax setting to cause the pump to compensate. Repeat this at least three
times to verify the pump compensates on and off stroke properly.
10. Use steps 10-12 for load sense pumps (“L” control option). Adjust the ow
control valve and load relief valve such that the pump is compensated and the
load pressure gauges reads at least 300-500 psi.
11. Turn the differential screw counter-clockwise until the pump compensates and
the difference between the load pressure gauge and pump outlet pressure
equals the desired differential setting. Tighten the differential screw lock nut to
lock the differential setting in place. The standard factory differential setting is
20 bar (290 psi). The minimum allowable setting is 10 bar (145 psi).
Test Procedure

Parker P1/PD Series Specifications

General

Brand	Parker
Model	P1/PD Series
Category	Water Pump
Language	English