29-22-00
 ALL  ú ú 10 Page 513 ú Dec 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 865-187
 (30) Open this circuit breaker on the P11 panel:
 (a) 11D31, HYDRAULICS PTU CONT
 S 435-188
 (31)
 Connect the electrical connector to the PTU control valve.

 S 865-189

 (32)
 Pressurize the right hydraulic system with the hydraulic service cart to 3000 psi.

 S 215-190

 (33)
 Make sure the POWER XFER UNIT message is shown on EICAS.

 S 865-191

 (34)
 Close this circuit breaker on the P11 panel:

 (a) 11D31, HYDRAULICS PTU CONT
 S 865-192
 (35)
 Push the ECS/MSG switch on the EICAS maintenance panel on the P61 panel. Push the AUTO EVENT READ switch, then push and hold the ERASE switch for approximately 3 seconds for each page of messages.

 S 215-193

 (36)
 Make sure you can not hear the operation of the PTU.

 S 215-194

 (37)
 Make sure the POWER XFER UNIT message is not shown on EICAS.

 S 865-195

 (38)
 Open this circuit breaker on the P11 panel:

 (a) 11D31, HYDRAULICS PTU CONT
 S 865-338
 (39) Return the toggle switch on the end of the left engine speed card (M10298) to the normal position or remove the jumper from the ground and test point J1 on the end of the left engine speed card (M10311).
 NOTE: Depending on the model of the speed card being
____ used, the new cards have the toggle switch , older cards have a test point.This removes the signal that the left engine is in operation.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-22-00
 ALL  ú ú 05 Page 514 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 865-197
 (40)
 Operate the hydraulic service cart to decrease the pressure in the right hydraulic system to zero.

 S 865-198

 (41)
 Close this circuit breaker on the P11 panel:

 (a) 11D31, HYDRAULICS PTU CONT
 S 215-199
 (42)
 Make sure the PTU control valve moves from the OPEN to the CLOSED position. The valve must move to the CLOSED position in less than 5 seconds after you close the circuit breaker.

 S 215-200

 (43)
 Make sure the POWER XFER UNIT message is shown on EICAS.

 S 215-201

 (44)
 Make sure you can not hear the operation of the PTU.

 S 865-202

 (45)
 Pressurize the right hydraulic system to 3000 psi.

 S 215-203

 (46)
 Make sure the POWER XFER UNIT message is shown on EICAS.

 S 215-204

 (47)
 Make sure you can not hear the operation of the PTU.

 S 865-205

 (48)
 Put the manual control switch for the PTU on the right side panel, P61, in the ON position.

 (49)
 Make sure you can hear the operation of the PTU.

 S 215-207
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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