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Changing Suction Ports While Changing Shaft Rotation
Models 4312-4316
To change suctions ports and change shaft rotation (clockwise or counterclockwise) please do the following.
• Looking at the pump from the shaft end with the ports up, note the location of the V notch in the bracket
• If at the top (12 o’clock), rotation is clockwise
• If at the bottom (6 o’clock), counterclockwise
Typical clockwise pump
V-Notch
Clockwise
Shaft Rotation
Discharge
Suction
• Remove the cover screws so that the bracket moves freely
• Rotate the bracket 180°
• Align the mounting holes and reinstall the cover screws making sure the seal gland is vented to the suction side of the pump
• If outtted with an internal relief valve the rotation cannot be changed in the eld unless the cover/valve assembly is also
replaced
WARNING
Failure to follow these instructions could result in serious bodily injury or death. Do not attempt to work on any Tuthill pump installation
before completing the steps below. Disconnect the drive so that it cannot be started while work is being performed. Review the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to determine its characteristics and the precautions necessary to
ensure safe handling. Vent all pressure within the pump through the suction or discharge lines. All Tuthill pump contain residual 200
SSU lube oil from the factory production test. Determine if this is compatible with the uid you are pumping. If the uid is incompatible,
consult the factory.
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