(5)
Pressurize the system B hydraulic system (AMM 29-15-00/201).
S 782-009
(6)
Make sure that the brake hydraulic pressure is normal, approximately 3000 psi.
S 782-008
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A 737-300/400/500MAINTENANCE MANUAL
Condition
One man in the control cabin
One man at the cabin station 990
1000 pounds attached to the nose gear
1000 pounds loaded at the forward cargo hold
One engine removed
Two engines removed Fuel in the Wing Tanks - Pounds
2,500 5,000 7,500
10,000
12,500
15,000
17,500
19,122
20,087
670
Incremental
Inches
-1.5
+1.2
-6.7
-3.8
+9.5
+20.7
-1.9 -3.3 -4.3 -5.1 -5.8 -6.2 -5.3
-3.5
CG Shift % MAC
-1.1 +0.9 -5.0 -2.9 +7.1 +15.4
-1.4 -2.4 -3.2 -3.8 -4.3 -4.6 -4.0
-2.6
CG STATION - INCHES
667
30
664
661
658
655
CG % MAC
25
20
652
AIRPLANE GROSS WT - 1000 LBS
____USE THE HORIZONTAL STABILIZER SETTING BETWEEN THE TRIM UNITS 1 AND 7 WHEN YOU TOW THE AIRPLANE.
NOTE: SEE THE STABILIZER POSITION INDICATOR ON THE AISLE CONTROL STAND IN THE CONTROL CABIN.
Towing Center of Gravity Limitations
Figure 201
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A
737-300/400/500
MAINTENANCE MANUAL
MAXIMUM TOWING LOADS (FORWARD OR AFT)
NOSE GEAR MAIN GEAR
ANGLE |180` TOW LOAD-F TOW 7 TOW LOAD ANGLE |30`
21,000 POUNDS 15,750 POUNDS
45`
45`
FWD
THE MAXIMUM STEERING/TOWING ANGLE
LIMIT OF THE NOSE GEAR TOWING ANGLE IS FOR PUSH BACK IS 75 DEGREES.
APPROXIMATELY 90 DEGREES UNLESS THE NOSE
GEAR TAXI LIGHT CABLE IS DISCONNECTED.
WITH THE TORSION LINK DISCONNECTED, THE
_______REMOVE THE PRESSURE FROM THE
CAUTION:
NOSE GEAR STEERING SYSTEM BEFORE
YOU TOW THE AIRPLANE. FAILURE
TO OBEY COULD RESULT IN DAMAGE
TO THE NOSE GEAR STEERING ACTUATOR.
Towing Loads and Turning Radius
Figure 202
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A 737-300/400/500MAINTENANCE MANUAL
120
110
100
90
80
70
60
50
NOSE GEAR ANGLE .* - DEGREES
*EFFECTIVE TAXI STEERING ANGLE = NG ANGLE - NG SLIPPAGE ANGLE *EFFECTIVE TOWING ANGLE = NG ANGLE
WING TIP RADIUS - D - FEET
NOTE:ALL OF THE WING TIP RADII (D) THAT ARE GIVEN ARE FOR THEORETICAL TURNS. THEORY IGNORES TIRE SCRUFFING ON A TURN, FRICTION FACTORS, ETC. ACTUAL RADII (D) WILL BE LARGER THAN THEORETICAL NUMBERS.
NOTE:THE EFFECTIVE TAXI STEERING ANGLE EQUALS THE NOSE GEAR ANGLE MINUS THE NOSE GEAR SLIPPAGE ANGLE. THE EFFECTIVE TOWING ANGLE EQUALS THE NOSE GEAR ANGLE.
Wing Tip Clearance Radius Figure 203
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A 737-300/400/500MAINTENANCE MANUAL
NOTE:
POINT B
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