TM 5-3810-307-24-1-1
14 PORT AIR/HYDRAULIC SWIVEL
DESCRIPTION
Each of the ports on the spool and barrel of the swivel
PORT
TEST PRESSURE
FUNCTION
NUMBER
is stamped with the port number. The function and test
pressure of each port is described below.
7
500 psi (3447.5 kPa)
Return
8
3500 psi (24132.5 kPa)
Steer-Rear Axle
PORT
TEST PRESSURE
FUNCTION
9
3500 psi (24132.5 kPa)
Steer-Rear Axle
NUMBER
10
3500 psi (24132.5 kPa)
Supply-Steer
1
150 psi (1034 kPa)
Throttle (Air)
11
3500 psi (24132.5 kPa)
Supply-O/R & Swing/AC
2
150 psi (1034 kPa)
Park Brake (Air)
12
3500 psi (24132.5 kPa)
Supply-Main/Aux Hoist
3
150 psi (1034 kPa)
Secondary Supply (Air)
13
3500 psi (24132.5 kPa)
Supply-Lift/Tele/Clamshell
4
150 psi (1034 kPa)
Primary Supply (Air)
14
500 psi (3447.5 kPa)
Return
5
150 psi (1034 kPa)
Delivery 1-Front (Air)
6
150 psi (1034 kPa)
Delivery 2-Rear (Air)
THEORY OF OPERATION
The hydraulic swivel allows oil to flow from the main
channel corresponds with a mating port on the barrel
pump and steer pump, to the various crane functions
of the swivel. Each channel is separated by a series
on the superstructure. All oil is routed into the spool
of Teflon and O-ring seals that prevents transfer of oil
portion of the swivel where, through a series of
and pressure. Return oil flow from the crane functions
internally drilled passages, oil is transferred to a
is accomplished in the same manner through another
circumferential channel on the spool exterior. This
set of ports.
MAINTENANCE
NOTE
For more detailed information refer to the applicable SM package.
and the turntable side plate. Shut down the engine.
REMOVAL.
1.
Extend and set the outriggers. Ensure the crane
3.
Measure the distance from the top of the lift
is level.
cylinder to the base of the boom section where the lift
cylinder attaches. Cut a piece of 4 x 4-inch (10.16 x
2.
Elevate the boom and note at what boom angle
10.16 cm) oak to fit.
you have the most clearance between the lift cylinder
