Hydraulic Pump (Service Replacement - Oildyne) - Piper SENECA II Service Manual

TABLE VI-I. LEADING PARTICULARS, HYDRAULIC SYSTEM
Hydraulic Pump
High Pressure
Low Pressure
Flow Rate @ 1000 psi
High Pressure Control
Hydraulic Fluid
Relief Valve
System Thermal Relief (AN6245 AB4) 2,350 ± 50 psi
Thermal Relief Valve
Shuttle Valve Delivered Pressure
Retraction Relief
Pressure Switch
Open (OFF) Pressure
Close (ON) Pressure
6. Connect blue lead to positive terminal of power supply. Pump should operate and the high
pressure gauge should indicate between 2000 and 2500 psi. (Should the gauge indicate a
pressure below 2000 psi or over 2500 psi, adjust valve "A," Figure 6-3 accordingly to obtain
the desired reading.)
NOTE: When increasing pressure, the pump running time must not exceed 12 seconds. There
should be no external leakage while performing Steps 5 thru 8.
7. Disconnect blue lead. The high pressure reading should not drop more than 300 psi in five
minutes. High pressure may not be selected again for five minutes.
8. Connect green lead to positive terminal of power supply. Pump should operate in reverse,
dropping reading on high pressure gauge to zero. The low pressure gauge should indicate 500
to 800 psi. (Should the gauge indicate a pressure below 500 psi or over 800 psi, adjust valve
"B," Figure 6-3, accordingly to obtain desired reading.) Disconnect green lead. Both pressure
gauges should indicate zero psi.
9. Should it be necessary to check the pump motor, first connect the ammeter in the electrical
circuit with the positive terminal of the meter to the black lead and negative terminal of the
meter to the negative terminal of the DC power supply.
10. Connect the blue lead from the pump motor to the positive terminal of the power supply. With
high pressure indication within 2000 to 2500 psi range on the pressure gauge, the ammeter
should read 75 amperes maximum. Disconnect the blue lead.
VI - HYDRAULIC SYSTEM
PIPER SENECA II SERVICE MANUAL
Prestolite
2,000 to 2500 psi
650 ± 150 psi
45 cu. in. per min.
2,250 ± 250 psi
MIL-PRF-5606H
(-00 only)
4,000 ± 300 psi
(-02 only)
2,250 ± 250 psi
400 to 800 psi
1,800 ± 100 psi
Pressure decreasing
200 to 400 psi
1I12
Oildyne
2,400 ± 200 psi
600 ± 200 psi
60 cu. in. per minute
2,400 ± 200 psi
MIL-PRF-5606H
3,000 + 300/-200 psi
400 to 800 psi
2,350 ± 50 psi
1,800 ± 100 psi
Pressure decreasing
200 to 400 psi
01/01/09