Manitowoc Published 05-09-17, Control # 014-28 2-19
16000 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
Accessory System Checks
High Pressure Accessory System
High pressure accessories include:
⢠Rotating bed jacks
⢠Front and rear rotating bed pins
⢠Live mast cylinders
⢠Carbody jacks (if equipped)
⢠Crawler pins
⢠Counterweight pins
⢠Boom Hinge pins
⢠Cooling Fan
⢠Cab tilt
⢠Rigging winch
To operate these items, use the controls on the hand-held
remote control and select the Liftcrane Mast Handling
Capacities Chart on the RCL screen.
Rotating Bed Jacking Cylinders
Perform the following procedure when the upperworks is
supported on the jacks.
1. Fully extend and retract jacks three to four times to
remove air from cylinders.
2. Scroll to jacking diagnostic screen to verify that 3,000 psi
(206 bar) is present when cylinders are fully extended
and retracted (stalled).
3. When controls are off, cylinders must not retract. If they
do, contact the Manitowoc Crane Care Lattice Team.
4. When retracting jacks, rotating bed must lower slowly
and smoothly.
Front and Rear Rotating Bed Pins
Perform the following procedure after the hydraulic lines are
connected to the cylinders just prior to connecting rotating
bed to adapter frame.
1. Unlock keeper plates to allow cylinders to operate.
2. Fully engage and disengage pins three to four times to
remove air from cylinders.
3. Scroll to pins diagnostic screen to verify that 3,000 psi
(206 bar) is present when pins are fully engaged and
disengaged (stalled).
Live Mast Cylinders
Perform the following procedure when the mast is removed.
1. Fully raise and lower mast cylinders three to four times
to remove air from mast cylinders.
2. Scroll to cab tilt, rigging winch, and mast diagnostic
screen to verify that 3,000 psi (206 bar) is present when
mast cylinders are fully extended (stalled) and 1,200 psi
(88 bar) is present when mast cylinders are retracted.
Carbody Jacking Cylinders (optional)
Perform the following procedure when the upperworks and
carbody are supported on the jacks.
1. Fully extend and retract jacks three to four times to
remove air from cylinders.
2. Scroll to jacking diagnostic screen to verify that 3,000 psi
(206 bar) is present when cylinders are fully extended
and retracted (stalled).
3. When controls are off, cylinders must not retract. If they
do, contact the Manitowoc Crane Care Lattice Team.
4. When retracting jacks, carbody must lower slowly and
smoothly.
Crawler Pins
Perform the following procedure prior to connecting the
crawlers to the carbody.
1. Remove collars from ends of pins.
2. Fully engage and disengage pins three to four times to
remove air from cylinders.
3. Scroll to pins diagnostic screen to verify that 3,000 psi
(206 bar) is present when pins are fully engaged and
CAUTION
Damage to Mast!
When raising mast for the first time or after maintenance
of mast cylinder, raise mast slowly and check that both
cylinders are raising mast evenly. Mast could twist if one
cylinder is not working correctly.