Piper PA-34-200T Seneca II, Service Manual

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PIPER SENECA II SERVICE MANUAL
01/01/09 VI - HYDRAULIC SYSTEM
1I14C
c. Replacing Entire Pump.
See “In Aircraft,” above, to remove/install pump in aircraft.
1. Disassembly.
a. Remove safety wire securing two bolts that attach bracket to pump.
b. Remove the two bolts and washers.
c. Separate pump assembly from bracket.
2. Installation.
a. If bracket was removed from pump mount, install bracket to Piper pump mount with four
MS24693-S298 screws.
b. Position pump assembly on bracket so that tapped holes in oildyne adapter align with bolt
holes on bracket.
c. Install two AN960-616 washers and two MS20074-06-05 bolts to secure pump assembly
to bracket.
d. Safety bolts with MS20995-C41 wire.
d. Replacing Hydraulic Pump Motor.
See “In Aircraft,” above, to remove/install pump in aircraft.
1. Disassembly.
a. Remove two each mounting bolts on flange of motor assembly and separate the motor
assembly from the pump.
b. Remove coupling and O-ring and discard.
NOTE: New O-ring and coupling are included in replacement motor assembly.
2. Assembly.
a. Locate the replacement O-ring and coupling.
b. Place the coupling and O-ring into position between the motor assembly and pump-
adapter assembly.
c. Apply light coating of Titeseal No. 3 in back of the first two threads of mounting bolts.
d. Positioning the two units in place, install two each mounting bolts through the flange of
the motor assembly and into the pump-assembly housing.
e. Torque bolts to 15–20 inch pounds.