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737-300/400/500MAINTENANCE MANUAL
(b)
Disconnect the hydraulic lines from the PTU.
(c)
Install caps on the hydraulic lines.
S 024-008
(2) Remove the PTU:
(a)
Remove the bolts that attach the PTU.
(b)
Remove the PTU.
S 034-018
(3) Remove the reducer from the outlet port of the PTU.
(a)
Discard the O-rings.
(b)
Install the plugs in the hydraulic ports.
TASK 29-22-11-404-002
3. PTU Installation (Fig. 401)________________
A. Consumable Materials
(1)
D00567 Skydrol Assembly Lube - MCS 352
(2)
D00568 Fluid - Hydraulic, BMS 3-11
B. References
(1)
AMM 12-12-00/301, Hydraulic Reservoirs
(2)
AMM 29-22-00/501, Hydraulic Power Transfer Unit (PTU) System
C. Procedure
S 434-011
(1) Install the hydraulic fittings in the PTU:
(a)
Remove the plugs from the hydraulic ports in the PTU.
(b)
Apply hydraulic fluid or skydrol assembly lube to the O-rings.
(c)
Install the O-rings and reducers in the PTU.
(d)
Install the O-ring and the check valve in the pressure outlet port of the PTU pump.
(e)
Install the reducer in the outlet port of the PTU.
S 614-012
(2) Fill the PTU (motor and pump) with hydraulic fluid until it is approximately one-half full.
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(3) S 424-013Install the PTU:
CAUTION:_______ INSTALL THE PTU WITH THE MOTOR ON THE LEFT SIDE OF THE AIRPLANE. THE SYSTEM WILL NOT OPERATE IF YOU INSTALL IT INCORRECTLY.
(a) (b) (c) Put the PTU in its position in the airplane with the pump on the right side.Install the bolts to attach the PTU.Connect the hydraulic lines to the PTU.
(4) S 614-014Fill the system B hydraulic reservoir (AMM 12-12-00/301).
(5) S 864-015Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P6 Panel 1) ELEC HYD PUMP CONT SYS A 2) ELEC HYD PUMP CONT SYS B 3) STBY HYD PUMP NORMAL 4) STBY HYD PUMP (ALTERNATE) 5) PTU/LG BYP V CONT 1 6) PTU/LG BYP V CONT 2
(6) S 714-016Do the PTU system operational test (AMM 29-22-00/501).
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737-300/400/500MAINTENANCE MANUAL
PTU PRESSURE FILTER MODULE - MAINTENANCE PRACTICES
__________________________________________________
1. General_______
A. There are five tasks in this procedure. There is a task for the removal and a task for the installation of the PTU pressure filter element. There is a task for the removal and a task for the installation of the PTU pressure filter module. There is also an operational test of the PTU pressure filter module.
TASK 29-22-21-022-001
2. PTU Pressure Filter Element Removal___________________________________
A. Standard Tools and Equipment
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