Manitowoc Published 11-06-15, Control # 040-13 5-15
2250 SERVICE/MAINTENANCE MANUAL HOISTS
3. If equipped with three drums, use drum selector to select
desired rear drum, right or left.
4. Fully release drum working brake (brake pedal up fully).
5. Turn on free-fall and turn off drum park for drum being
serviced. Drum parking brake will release.
6. Push in regulator adjusting knob (Figure 5-11
) for brake
being adjusted.
7. Turn knob clockwise to increase pressure or
counterclockwise to decrease pressure until gauge
reads 60 psi (4,1 bar) Past Production or 70 psi (4,8 bar)
Current Production as viewed from knob end. This is
initial setting only.
8. Adjust regulator:
Current Production — Until the distance from bottom
of actuator to top of rod end is 1.0 inch (25,4 mm) as
shown in Figure 5-12
.
Past Production — Until distance from top of actuator
to washer inside actuator is 9/16 in (14 mm) as shown in
Figure 5-12
. This measurement can be checked at
either actuator.
9. If proper dimension is not obtained, turn regulator knob
clockwise to decrease or counterclockwise to
INCREASE (directions viewed from knob end).
10. Pull out knob to lock regulator setting when proper
dimension is obtained.
FIGURE 5-11
Rear or Right Rear
Drum Parking Brake
Regulator
P805
Knob
Left Rear Drum
Parking Brake
Regulator
Front Drum Parking
Brake Regulator
(if equipped)
Left Side of Rotating Bed
Front Drum Parking
Brake Solenoid Valve
(if equipped)
Rear or Right Rear
Drum Parking Brake
Solenoid Valve
Left Rear Drum
Parking Brake
Solenoid Valve
Knob
Rear Drum
Parking Brake
Regulator
Front Drum Parking
Brake Regulator
Front Drum
Parking Brake
Solenoid Valve
Rear Drum
Parking Brake
Solenoid Valve
Knob
Knob
P805a
Left Side of Rotating Bed
(With Independent Drum Drive)
FIGURE 5-12
9/16 in (14 mm)
Brakes Released
A467
Washer
1.0 in (25,4 mm)
Brakes Released
Past Production
Actuator
Current Production
Actuator
192773-1
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