Manitowoc National Crane 1300A Service And Maintenance Manual

National Crane 01-22-2019 Control # 051-08 6-1
1300A SWING
6
SECTION 6
SWING
SECTION CONTENTS
Swing Description . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Swing Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Swing Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Swing Gearbox and Brake . . . . . . . . . . . . . . . . . . . 6-4
Disassembly & Assembly Instructions . . . . . . . . . 6-4
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Parts Required to Rebuild. . . . . . . . . . . . . . . . . . . 6-4
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Input Planetary Repair . . . . . . . . . . . . . . . . . . . . . 6-4
Output Planetary Repair . . . . . . . . . . . . . . . . . . . . 6-5
Shaft Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Case Assembly Repair . . . . . . . . . . . . . . . . . . . . . 6-5
Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Swing Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Swing Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Swing Bearing Maintenance. . . . . . . . . . . . . . . . . . 6-8
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Torquing Swing Bearing Bolts . . . . . . . . . . . . . . . . 6-8
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Swing Bearing Bolts. . . . . . . . . . . . . . . . . . . . . . . . 6-9
Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Bearing Clearance . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Bearing Replacement . . . . . . . . . . . . . . . . . . . . . . 6-12
Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Slew Potentiometer Adjustment. . . . . . . . . . . . . . 6-14
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
SWING DESCRIPTION
The purpose of the swing system is to allow the crane turret
to rotate atop the carrier frame. The 1300A swing system
provides full 360 degree rotation in both directions and is
equipped with free swing capabilities. With free swing, the
SWING BRAKE switch is in the OFF position and the turret
swings freely after the SWING control lever is released and
coasts to a stop.
NOTE: When equipped with a radio remote control, the
swing brake is automatically applied whenever the
swing control lever is in the neutral position.
The swing system consists of a hydraulic remote controller,
directional control valve, swing drive gearbox, swing motor,
swing brake, and swing brake pedal. The maximum rotation
is 2.0 rpm. The swing control lever is used to slow and stop
the swing by moving the control lever to the opposite
direction of the swing. The swing brake pedal is used to keep
the turret parked in position.
THEORY OF OPERATION
Swing Drive
The hydraulic power for the swing drive (Figure 6-2) is
supplied by the section P3 in the PTO driven hydraulic gear
pump. Oil flows from the pump, through swivel port #2, to the
main directional control valve.
When the hydraulic remote control is positioned to select
right or left swing, the flow through the control valve is
directed to the swing motor. If the SWING BRAKE selector
switch is in the OFF position, the turret rotates in the desired
direction. Shifting the control to neutral allows the turret to
coast to a stop. Shifting the control to the opposite directions
powers the turret to a stop. Depressing the swing brake
pedal holds the turret in position.
Swing Brake
Hydraulic power for the swing brake control is supplied by
the crane manifold and swing brake pedal valve. The
hydraulic power for the swing brake release is supplied by
swing brake release solenoid on the crane manifold. With the
SWING BRAKE selector switch positioned to ON, the swing
brake release valve blocks the regulated flow to the brake
release port and spring pressure in the swing brake applies
the brake. When the SWING BRAKE selector switch is
positioned to OFF, the regulated flow is directed from the
pressure reducing/sequence valve to the brake release port,
overcoming the brake spring pressure and releasing the
swing brake.

Manitowoc National Crane 1300A Specifications

General

Brand	Manitowoc
Model	National Crane 1300A
Category	Construction Equipment
Language	English