2.
Remove anti-splash cover (Piper P/N 96374-0) by removing the four attaching screws,
3.
Disconnect the three knife connectors that attach the black, blue, and green forward and reverse harness wires.
4.
Disconnect and plug the UP and DOWN pressure hydraulic lines from pump mount. Cap the lines .
5.
Remove the three each mounting bolts and washers securing pump mount to deck
6.
Lift assembly from airplane.
FIELD SERVICE OF HYDRAULIC PUMP
Field service of hydraulic pump is limited to motor replacement and removal, cleaning, and inspecting the hydraulic fluid reservoir. Should pump malfunction, either replace pump, or return pump to Piper Aircraft, via the local Piper distributor, for servicing or repairs.
DISASSEMBLY OF HYDRAULIC PUMP from bracket (Refer to Figure 29-2, Sheet 1 of 2)
1.
Remove safety wire securing two bolts that attach bracket to pump.
2.
Remove the two bolts and washers.
3.
Separate pump assembly from bracket.
DISASSEMBLY OF MOTOR ASSEMBLY FROM PUMP-ADAPTER ASSEMBLY
(Refer to Figure 29-2, Sheet 2 of 2)
1.
Remove two each mounting bolts on flange of motor assembly and separate the motor assembly from the pump.
2.
Remove coupling and O-ring and discard.
— Note —
New O-ring and coupling are included in replacement motor assembly.
29-10-00 Page 29-11 Revised: December 6, 2002
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
DISASSEMBLY OF RESERVOIR ASSEMBLY FROM PUMP-ADAPTER ASSEMBLY
(Refer to Figure 29-2, Sheet 2 of 2)
— CAUTION —
DO NOT DISASSEMBLE PUMP ASSEMBLY FROM ADAPTER ASSEMBLY. DAMAGE TO VALVES AND PRESSURE SETTINGS, WHICH ARE NON-ADJUSTABLE, WILL OCCUR.
1.
Remove screw and O-ring securing the reservoir to the adapter assembly.
2.
Remove reservoir and reservoir seal.
3.
When replacing reservoir, remove the cushion pad. It will have to be bonded to the new reservoir base using Scotch Grip 2210 or Contact Adhesive B-10161 rubber cement.
ASSEMBLY OF RESERVOIR TO PUMP-ADAPTER ASSEMBLY (Refer to Figure 29-2, Sheet 2 of 2)
1.
Locate the cushion pad and bond it to the bottom surface of the reservoir using Scotch Grip 2210, or Contact Adhesive B-10161 rubber cement.
2.
Position the reservoir seal between the reservoir and the adapter assembly.
3.
Locate the O-ring and bolt that secures the reservoir to the pump-adapter assembly and apply a light coating of Titeseal No. 3 in back of first two bolt threads.
4.
Position the O-ring on the bolt, and install it through the reservoir and into the pump-adapter securing the reservoir.
5.
Tighten this bolt to a torque value of 40 - 50 inch pounds.
INSTALLATION OF MOTOR ASSEMBLY TO PUMP-ADAPTER ASSEMBLY
(Refer to Figure 29-2, Sheet 2 of 2)
1.
Locate the replacement O-ring and coupling.
2.
Place the coupling and O-ring into position between the motor assembly and pump-adapter assembly.
3.
Apply light coating of Titeseal No. 3 in back of the first two threads of mounting bolts.
4.
Positioning the two units in place, install two each mounting bolts through the flange of the motor assembly and into the pump-assembly housing.
5.
Torque bolts to 15 -20 inch pounds.
INSTALLATION OF PIPER BRACKET TO HYDRAULIC PUMP ASSEMBLY
(Refer to Figure 29-2, Sheet 1 of 2)
1. If bracket was removed from was removed from pump mount, install bracket to Piper pump mount with four MS24693-S298 screws.
1.
Position pump assembly on bracket so that tapped holes in adapter align with bolt holes on bracket.
2.
Install two AN960-616 washers and two MS20074-06-05 bolts to secure pump assembly to bracket.
3.
Safety bolts with MS20995-C41 wire.
29-10-00 Page 29-12 Revised: December 6, 2002
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
29-10-00 Page 29-13 Revised: December 6, 2002
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
29-10-00 Page 29-14 Revised: December 6, 2002
2F10
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
INSTALLATION OF HYDRAULIC PUMP (Refer to Figure 29-2, Sheet 1 of 2)
1.
Position assembled pump, bracket, and pump mount on pump deck in airplane.
2.
Secure pump assembly to deck by installing the three AN3-10 bolts with one MS35489-64 washer under each bolt head and three No. 5712-45 (Piper P/N 494 192) washers between Piper mount assembly and pump deck.
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