(b)  
Retract the pawls 1 to 2 turns to set the adjustment.

 (c)  
Make sure that the parking brake can be set from the seats of the pilot and the first officer.

 (d)  
If it is necessary, adjust the pawls (retract one turn at a time) until the parking brake can be set from the pilot and first officer seats.

 NOTE: The more the pawls are retracted, the higher the parking
____ brake bleed-down rate will be.
 (e)  Lock the adjustment.
 S 415-004
 (3)
Add or remove the washers to set the bumper stop for the pawls:

 (a)  
With the parking brake off, push the brake pedals.

 (b)  
Make sure the pick-up bolt (on the brake control bellcrank) is clear of the pawl by 5/32 inch at the closest point.

 S 825-005
 (4)  
Adjust the switch actuator of the parking brake
 (Fig. 501, Detail E):

 (a)  
Turn the jackshaft and install the rig pin through the outboard forks and the switch mounting bracket.

 (b)  
Loosen the bolts on the switch mounting bracket.

 (c)  
Turn the switch assembly to get a gap of 0.23 +/- 0.03 inches between the switch actuator roller and the end of the pushrod.

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 (d)  Tighten the bolts on the switch mounting bracket.
 S 215-006
 (5)  
Make sure the parking brake lever touches the top of the control stand when the parking brake is off.

 S 215-007

 (6)  
If it is necessary, adjust the length of the pushrod directly attached to the parking brake lever.

 TASK 32-44-00-705-008
 2.  Parking Brake System Test_________________________
 A. Standard Tools and Equipment
 (1)  
Pressure gages - 0 to 3500 psi, for hydraulic fluid. Four required

 (2)  
Hydraulic service cart - 0 to 3000 psi capacity

 (3)  
Locks - Gear

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 29-15-00/201, Hydraulic Systems

 (3)  
AMM 32-00-01/201, Ground Locks

 C.
Access

 (1)  
Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right
 216 Left Main Wheel Well
 310 Left Main Landing Gear
 410 Right Main Landing Gear

 D.
Prepare for the Parking Brake System Test

 S 845-009
 (1)  
Connect the external electrical power (AMM 24-22-00/201).

 S 215-010

 (2)  
Make sure you install the ground locks of the main and nose landing gear (AMM 32-00-01/201).

 S 845-011

 (3)  
Make sure you close the antiskid fail warning circuit breaker (found on the load control center panel P6).

 S 845-012

 (4)  
Remove the pressure from hydraulic Systems A and B
 (AMM 29-15-00/201).

 S 845-013

 (5)  
Fully operate the brakes 12 times to remove the pressure from the brake system accumulator.

 S 845-014

 (6)  
Make sure the precharge pressure of the brake accumulator agrees with the placard.

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737-300/400/500MAINTENANCE MANUAL
 S 845-015
 (7)  
Remove the bleed screw and install a 3500 psi gage at the upper bleed port of the brakes.

 S 845-016

 (8)  
Pressurize the hydraulic System B for a minimum of 10 minutes to let accumulator temperature stabilize (AMM 29-15-00/201).

 E.
Parking Brake System Accumulator Bleed Down Test - Parking Brake Set

 S 845-017
　
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