3535
Stripe Hog Systems
2.5 Thru-shaft, Spray Bars,
Protectors And Nozzles
Thru-shaft Motor
The hydraulic powered thru-shaft motor rotates
the spray bar on the blasting head assembly.
The center of the rotating shaft is drilled to allow
high pressure water to pass through the shaft to
the spray bar. A specially designed swivel seal
and brass backup ring create a water tight, high
pressure seal at the connection of the high pres-
sure hose to the thru-shaft. The hose is secured
to the rotating shaft housing by the swivel nut.
The swivel nut is hand tightened. If the nut
becomes loose, the hose will wobble and damage
the swivel seal. Additionally, if the swivel nut is
overtightened by using a pipe wrench or pliers,
the swivel seal will be damaged. The swivel nut
must be checked daily to ensure it is tight and
that the swivel seal is not leaking. Any water drip-
ping from the weep holes just below the swivel
nut while the system is pressurized indicates the
seal is leaking and must be replaced. Operating
the blasting heads with a leaking swivel seal will
cause complete failure of the seal, stopping blast-
ing operations.
The RPM of the thru-shaft motor on each blast-
ing head is independently controlled by the PLC
mounted on the Joystick console. A speed sensor
on each thru-shaft motor housing continuously
monitors the RPM of the thru-shaft/spray bar and
sends the data to the PLC where the RPM of each
spray bar is displayed on separate windows on
the display panel. During blasting operations, the
operator can monitor the RPM of each spray bar
and make adjustments as necessary.
1. Swivel Nut
2. Swivel Seal Weep Hole
3. Thru-shaft Cover
4. Grease Fitting
5. Speed Sensor
6. Brass Backup Ring
7. Swivel Seal
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Thru-shaft Motor Components
Swivel Seal & Brass Backup Ring
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