10-11-00
 ALL  ú ú 01 Page 206 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 912-023
 WARNING: YOU MUST REFER TO AND OBEY THE GROUND SAFETY PRECAUTIONS FOR
_______ THE ENGINES WHEN YOU OPERATE THE ENGINES. IF YOU DO NOT OBEY THE PRECAUTIONS, INJURIES TO PERSONS CAN OCCUR.
 (1)  Do the Engine Ground Safety Precautions procedure.
 S 912-005
 WARNING: YOU MUST REFER TO AND OBEY THE GROUND SAFETY PRECAUTIONS FOR
_______ THE ENGINES WHEN YOU WILL MOVE THE AIRPLANE WITH ITS POWER. IF YOU DO NOT OBEY THE PRECAUTIONS, INJURIES TO PERSONS CAN OCCUR.
 (2)  
If you will move the airplane with its power (taxi), refer to AMM 09-20-00/201 for the precautions for taxi operations.

 S 492-006

 (3)  
If you will tow the airplane, lift the airplane on jacks, or plan to do maintenance on the airplane, install the landing gear ground lock assemblies for the main gear and the nose gear (Fig. 202, Fig. 203).

 S 912-009

 (4)  
Refer to AMM 10-21-00/201 if there is a strong wind.

 S 912-010

 (5)  
Ground the airplane (AMM 20-40-11/201).

 S 912-011

 (6)  
If the area has ice or snow on the surface, put a mat or an equivalent material below and around the tires.

 NOTE: The tires will not freeze to the ground if you use a mat.
____
 S 862-012
 (7)  
Turn the battery switch to the ON position.

 (8)  
Pressurize the B hydraulic system (AMM 29-15-00/201).

 S 862-013
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 10-11-00
 ALL  ú ú 01 Page 207 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 862-024
 (9) After 10 minutes, set the parking brake as follows:
 NOTE: Make sure you set and release the parking brake with the same
____ hydraulic system pressurized. If you release the parking brake with a different system pressurized, you will transfer hydraulic fluid from one system to the other.
 (a)
Push the brake pedals and hold them

 (b)
Pull the brake handle on the captain's control stand

 (c)
Release the brake pedals.

 S 862-025
 (10) Depressurize the B hydraulic system.
 NOTE: The parking brake will hold for a maximum of 8 hours before
____
 the B hydraulic system must be pressurized again.

 NOTE: It is possible that a parking brake failure will occur if the
____
 pressure gage indicates less than 1200 psi.

 S 492-014
 (11) Put chocks in front of and behind the two main gear wheels.
 S 862-015
 CAUTION: DO NOT LET THE PARKING BRAKE STAY ENGAGED FOR MORE TIME THAN
_______
 IS NECESSARY IF THE BRAKES ARE HOTTER THAN USUAL. IF THE
 BRAKES ARE VERY HOT, THEY CAN BOND TOGETHER WHEN THE PARKING
 BRAKE IS ENGAGED.

 (12) Push on the brake pedals to release the parking brakes.
 NOTE: A light on the control stand, adjacent to the parking brake
____
 lever, is on when the parking brake is engaged.

 NOTE: Make sure you set and release the parking brake with the same
____ hydraulic system pressurized. If you release the parking brake with a different system pressurized, you will transfer hydraulic fluid from one system to the other.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 10-11-00
 ALL  ú ú 01 Page 208 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 862-018
 (13)
 Make sure the flaps are in the fully up position.

 S 862-016

 (14)
 Turn the battery switch to the OFF position, if it is not necessary to have it on.

 S 862-017

 (15)
 Set the stabilizer, aileron and rudder trim control to ZERO.

 S 862-019