HYDRAULIC SYSTEM 16000 SERVICE/MAINTENANCE MANUAL
2-20
Published 05-09-17, Control # 014-28
Counterweight Pins
Perform the following procedure after the hydraulic lines are
connected to the cylinders just prior to lifting the
counterweight tray into position at rear of rotating bed.
1. Fully engage and disengage pins three to four times to
remove air from cylinders.
2. Scroll to pins diagnostic screen to verify that 3,000 psi
(206 bar) is present when pins are fully engaged and
disengaged (stalled).
Boom Hinge Pins
Perform the following procedure after the hydraulic lines from
butt are connected to the crane just prior to aligning the
boom butt with the rotating bed.
1. Fully engage and disengage pins three to four times to
remove air from cylinders.
2. Scroll to pins diagnostic screen to verify that 3,000 psi
(206 bar) is present when pins are fully engaged and
disengaged (stalled).
Cab Tilt
1. Fully raise and lower cab three to four times to remove
air from cylinders (use switch in operator’s cab).
2. Scroll to cab tilt diagnostic screen to verify that 3,000 psi
(206 bar) is present when cylinders are fully engaged
and disengaged (stalled).
3. When control is off, cylinders must not retract. If they do,
contact the Manitowoc Crane Care Lattice Team.
4. When lowering cab, it must lower slowly and smoothly. If
necessary adjust cab tilt flow meters as described in this
section.
Rigging Winch (Optional):
1. Enable rigging winch (see instructions in Section 3 of
Crane Operator Manual).
2. Operate winch several times in both directions to make
sure it is operating properly and to remove air from
system.
3. Scroll to cab tilt, rigging winch, and mast diagnostic
screen to verify that 3,000 psi (206 bar) is present when
operating winch.
Low Pressure Accessory System
A pressure reducing valve limits pressure in the low pressure
accessory system to the value specified in Table 2-10
.
The low pressure accessory system controls the swing
brake, swing lock (past production), travel brake, travel 2-
speed, diverting valves, and boom hoist pawl.
Swing Brake And Swing Lock
NOTE: The swing lock is installed on past production
cranes only. On current production cranes the
swing lock has been removed and the rocker
switch has been removed from the console.
Perform the following check in an area where the crane can
be swung without interference.
1. Scroll to swing diagnostic screen to monitor swing
component icons.
2. Turn off swing park, disengage swing lock, and attempt
to swing crane by moving control handle in both
directions.
3. Crane must swing freely.
4. Swing screen (past production) should indicate that
swing park brake is released and swing lock is
disengaged.
5. Swing screen (current production) should indicate that
the swing park brake is released and the swing brake
pressure senor will report to Node-5 the hydraulic
pressure at the swing brake.
6. Bring upperworks to a complete stop, move control
handle to off, turn on swing park and engage swing lock.
7. Swing handle should be inoperable.
8. Swing screen should indicate no handle or pump
commands and that swing park brake is applied and
swing lock is engaged.
Travel Brakes
Perform the following check in an area where the crane can
be traveled without interference.
1. Scroll to travel diagnostic screen to monitor travel
component icons.
2. Turn off travel park and attempt to travel crane by
moving control handles in both directions.
3. Crane must travel freely.
4. Travel screen should indicate that travel park brakes are
released.
5. Turn on travel 2-speed. Travel speed should increase
and travel screen should indicate that 2-speed is on.
6. Bring upperworks to a complete stop, move control
handles to off, and turn on travel park.
7. Travel handles should be inoperable.
8. Travel screen should indicate no handle or pump
commands and that travel park brakes are applied.
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