78.90 lbf.ft).
(15)
Connect the self-sealing coupling (4) to the LP port (5) of the Green hydraulic system.
(16)
TORQUE the coupling (4) to between 9.7 and 10.7 m.daN (71.53 and
78.90 lbf.ft).
(17)
Connect the hose to the HP port (6) of Green hydraulic system.
(18)
TORQUE the union nut (3) to between 7.5 and 8.3 m.daN (55.30 and
61.20 lbf.ft).
(19)
Connect the hose to the case drain port (18) of the Green hydraulic system.
(20)
TORQUE the union nut (2) to between 2.9 and 3.2 m.daN (21.38 and
23.59 lbf.ft).
(21)
Connect the hose to the case drain port (17) of the Yellow hydraulic system.
(22)
TORQUE the union nut (1) to between 2.9 and 3.2 m.daN (21.38 and
23.59 lbf.ft).
(23)
Connect the bonding strap (19) to the power transfer unit (7) with the screw (21), the washer (22) and the nut (20) (Ref. TASK 20-28-00-912-004).
(24)
Connect the hose to the seal drain port (10).
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(25) TORQUE the union nut (9) to between 1.2 and 1.3 m.daN (106.19 and
115.04 lbf.in).
Subtask 29-23-41-860-051
B. Preparation for the Test
(1)
Do a check of the filter element of the Green LP filter 1002GM (Ref. TASK 29-11-44-610-001).
(2)
Do a check of the filter element of the Green HP filter 1048GM (Ref. TASK 29-11-45-610-001).
(3)
If you find contamination in the filter elements (for example: particles, jelly):
-Do the flushing procedure of the Green hydraulic system of the PTU (Ref. TASK 12-36-29-170-004).
(4)
Do a check of the filter element of the Yellow LP filter 3002GM (Ref. TASK 29-13-44-610-001).
(5)
Do a check of the filter element of the Yellow HP filter 3048GM (Ref. TASK 29-13-45-610-001).
(6)
If you find contamination in the filter elements (for example: particles, jelly):
-Do the flushing procedure of the Yellow hydraulic system of the PTU (Ref. TASK 12-36-29-170-005).
(7)
Remove the warning notices.
(8)
Connect the isolation coupling of the PTU (Ref. TASK 29-23-00-860-002).
(9)
Pressurize the reservoirs of the Green and Yellow hydraulic systems (Ref. TASK 29-14-00-614-002).
(10)
Make sure that the fluid level in the reservoirs of the Green and Yellow hydraulic systems is correct. Add fluid as necessary (Ref. TASK 12-12-29-611-001) .
(11)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
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Subtask 29-23-41-870-050
C. Bleeding Procedure of the PTU with the Electric Pump of the Yellow
Hydraulic System and a Ground Hydraulic Supply
(1)
Make sure that the isolation coupling of the PTU is connected.
(2)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
(3)
On the panel 40VU:
(a) Make sure that the OFF light of the PTU P/BSW is on.
(4)
Pressurize the Green hydraulic system with a ground cart (Ref. TASK 29-10-00-863-001).
(5)
Pressurize the Yellow hydraulic system with the E-pump (Ref. TASK 29-24-00-863-001).
(6)
Make sure that the pressure in the hydraulic systems is approximately 3000 psi (206.8427 bar).
(7)
On the panel 40VU:
(a)
Push the PTU P/BSW.
(b)
Make sure that the OFF light of the PTU P/BSW goes off.
(8)
Make sure that the PTU does not start.
(9)
Keep the hydraulic systems pressurized for a minimum of 15 minutes.
(10)
Examine the hydraulic connections of the PTU and make sure that there are no leaks.
(11)
On the panel 40VU:
(a)
Push the PTU P/BSW.
(b)
Make sure that the OFF light of the PTU P/BSW comes on.
(12)
Depressurize the Green and Yellow hydraulic systems (Ref. TASK 29-10-00-864-001) and (Ref. TASK 29-24-00-864-001).
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(13)
On the panel 40VU:
(a)
Push the PTU P/BSW.
(b)
Make sure that the OFF light of the PTU P/BSW goes off.
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