Test And Adjustment; 1I10 - Piper SENECA II Service Manual

b. Assemble valve and gear case (15) to the reservoir (13) as follows:
1. If removed, place pump gears in valve and gear case and install cover. Install cover attaching
bolts and secure.
2. Lubricate reservoir seal ring (14) with hydraulic fluid (MIL-PRF-5606H) and place in recess
provided in case (15).
3. Position reservoir (13) on valve and gear case (15). Care should be taken when aligning the
armature shaft with the pump gear. Do not run the motor to accomplish this.
4. Ascertain that the seal ring (14) is properly positioned, and install attaching screws. Tighten
one screw to hold the assembly together, then, with the motor connected to a 14-volt source
and an ammeter in the circuit, tighten the rest of the screws such that the current drawn does
not exceed 12 amperes.
c. Attach the pump base to the pump as follows:
1. With pump inverted, lubricate O-ring seals and install them in recesses provided in the valve
and gear case (15).
2. Install attaching bolts with washers and torque to 70 inch-pounds.
3. Safety attaching bolts with MS20995-C32 wire.
d. Conduct motor operational check not to exceed 10 seconds running time.
6-9. TEST AND ADJUSTMENT. (Refer to Figure 6-4.)
a. Test Equipment:
1. Hydraulic pump and mounting base.
2. Pressure gauge (0 - 1000 psi).
3. Pressure gauge (0 - 3000 psi).
4. Hoses with fittings to connect base and gauges.
5. Power supply (14 VDC).
6. Ammeter (0 to 100 amps).
7. Fuse or circuit protector (100 amps).
b.

Test and Adjustment:

NOTE: Test gauges or gauges of known accuracy should be used when performing the following tests.
1. Connect the 0 to 1000 psi gauge to the low pressure port of the pump base.
2. Connect the 0 to 3000 psi gauge to the high pressure port of the pump base.
3. Connect black lead of pump motor to the negative terminal of the DC power supply.
4. Remove the filler plug located on the forward side of the pump. Loosen vent screw and add
fluid, MIL-PRF-5606H, through the filler hole until full. Reinstall the filler plug and tighten
the vent screw.
5. Bleed air from the attached lines. (Lines may be bled by alternately connecting blue lead and
green lead to the positive terminal of the power supply until all air is exhausted.)
VI - HYDRAULIC SYSTEM
PIPER SENECA II SERVICE MANUAL

1I10

01/01/09