Service Manual 73
Page 9 of 32
Inspection / Repair
Should it be necessary to remove the pump from service for periodic inspection of components
and/or a major repair, the following steps should be taken.
!
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.
Only authorized personnel who are familiar with the repair of mechanical products should perform
the necessary repair work. You must familiarize yourself with the entire contents of this manual
prior to performing any work
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.
Ensure that the pump has cooled a safe temperature prior to performing any work on the pump.
Pump Disassembly - Partial
The GG Series of pumps provides the ability to rebuild the internal pumping components of the
pump without removing the pump housing from the baseplate. This is accomplished by removing
the cover and idler gear from the front end of the pump and the drive module from the shaft end
of the pump.
REMOVING THE COVER AND IDLER GEAR
REMOVE PUMP COVER:
Note: On pumps with relief valves on the cover, the cover can be removed with the relief
valve still mounted onto the cover.
IF NECESSARY, REMOVE SAFETY RELIEF VALVE:
If the pump has a safety relief valve mounted on it, remove it by loosening the bolts that
mount it to the cover or housing.
Prior to removing the cover, the general position should be marked in relationship to the
housing. Once done, remove the cover bolts and the cover.
!
WARNING
When removing the cover, the idler gear will generally stay on the pin. Avoid tilting the cover
downward as the idler may slide off, causing injury or damage.
