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Summary of Contents for Tuthill AC
- Page 1 Tuthill Pump Group 12500 South Pulaski Road Alsip, IL 60803 o 708.389.2500 f 708.388.0869 Service Instruction No. 22 Rev. 3 04/08 INSTALLATION AND SERVICE INSTRUCTIONS C SERIES PUMPS V1.4 1 of 22 04/01/2009...
- Page 2 General Description Model AC Model AC pumps are available in six sizes, ranging in capacity from 2 to 84 gpm with differential pressures to 100 psi. The maximum discharge pressure capability is 125 psi. They have an integrally cast mounting foot and are supplied in four different mounting styles.
- Page 3 25 psi and differential pressures to 100 psi. The Pumping Principle Tuthill C Series cast iron pumps employ the internal gear pumping principle. There are only two moving parts. Pumping action is based on a rotor, idler gear and crescent-shaped partition cast integral with the cover.
- Page 4 Determine if this is compatible with the fluid you are pumping. If the fluid is incompatible, consult the factory. Most Tuthill C Series pumps are required to develop 25" mercury vacuum at 0 psi on factory test. While these pumps will develop as high as 27" of vacuum, it is a sound engineering practice to avoid extreme vacuum whenever possible.
- Page 5 Most Tuthill C Series pumps are supplied with both ports on the same plane. Pumps with this type of porting arrangement should always be installed with the ports facing upward to insure proper priming.
- Page 6 Never align a pump and motor supplied with a pin type coupling without first removing the pins. Never depend upon sight or feel. Use proper gauges when aligning the pump. Never operate the pump without all guards in place. Relief Valve Protection All C Series models are positive displacement pumps.
- Page 7 30" Hg. vacuum. WARNING! All Tuthill pumps contain residual 200 SSU lube oil from the factory test. Determine if this is compatible with the fluid you are pumping. If the fluid is incompatible, consult the factory. If the pump is to operate at elevated temperatures, it should be brought up to operating temperature gradually.
- Page 8 • Open suction and discharge gate valves. • Check for any leaks once gate valves are open. After completing these checks the pump can be started. CAUTION! The pump should not be run dry. If after approximately 60 seconds there is no discharge of liquid, stop the pump and investigate the possible cause.
- Page 9 Model AC Lubrication Model AC pumps are provided with a grease cup or grease gun fitting at the outer bearing which also lubricates the packing. A good grade of medium cup grease, such as Fiske Bros. Lubriplate #930 AAA, should be used. Apply until visible at the outer end of the packing gland.
- Page 10 1 1/2" Changing Rotation Model AC pumps in sizes 1 through 6 are bi-directional and will work equally well in either direction of rotation with no modification. If outfitted with an internal relief valve (model ACV), these pumps become rotational.
- Page 11 Repacking • Grip the pump firmly across the ports and opposite side of the housing in a vise with the shaft end up. • Inspect the shaft at the flat and keyway area. Any burrs will interfere with removal of the packing gland. Use a small, fine file if necessary. •...
- Page 12 If outfitted with an internal relief valve (model C1GV), the rotation cannot be changed in the field unless the cover/valve assembly is also replaced. To change the location of the suction port on pumps supplied with Tuthill's unique automatic reversing feature (model RC1G), the following must be done in addition to the steps above: •...
- Page 13 If outfitted with an internal relief valve (models C1EV and C1ENV), the rotation cannot be changed in the field unless the cover/valve assembly is also replaced. To change the location of the suction port on pumps supplied with Tuthill's unique automatic reversing feature (models RC1E and RC1EN), the following must be done in addition to the steps above: •...
- Page 14 If outfitted with an internal relief valve (models C1FV and C1FAV), the rotation cannot be changed in the field unless the cover/valve assembly is also replaced To change the location of the suction port on pumps supplied with Tuthill’s unique reversing feature (models RC1F and RC1FA), the following must be done in addition to the above steps: •...
- Page 15 If outfitted with an internal relief valve (model C1BV), these pumps become rotational. Rotation cannot be changed in the field unless the cover/valve assembly is replaced. To change the location of the suction port on pumps supplied with Tuthill's unique automatic reversing feature (model RC1B): •...
- Page 16 Model CK1B Seal Replacement • Remove the cover, idler assembly and cover gaskets. • Place the pump, cover side down, on blocks set wide enough apart so that the rotor will clear when pressed out. • Remove the screws from the bearing housing and pull it off. The inner bearing sleeve will remain pressed onto the rotor shaft.
- Page 17 If outfitted with an internal relief valve (model CK1BV), the rotation cannot be changed in the field unless the cover/valve assembly is also replaced. To change the location of the suction port on pumps supplied with Tuthill's unique automatic reversing feature (model RCK1B), the following must be done in addition to the steps above: •...
- Page 18 • Remove the rotor by pressing on the hollow drive shaft with an arbor of approximately 1.375" (35 mm). With model CC009 pumps, the mechanical seal will remain in the housing. With model CC015, CC020 and CC030 pumps, the rotating element of the seal will come out with the rotor. •...
- Page 19 Vent all pressure within the pump through the suction or discharge lines. All Tuthill pumps contain residual 200 SSU lube oil from the factory production test. Determine if this is compatible with the fluid you are pumping. If the fluid is incompatible, consult the factory.
- Page 20 These are available from Tuthill as spare parts. The minimum end clearances for proper pump operation are as follows:...
- Page 21 • Install the housing over the rotor head positioned on the bracket register. • Place the idler gear on the pin in the cover assembly and position in the housing register. • Align the matching marks for proper location. • Install the cover screws. Tighten gradually, alternating from a screw on one side to a screw on the opposite side.
- Page 22 No RGA can be issued until a completed Material Safety Data Sheet (MSDS) has been forwarded to our Chicago plant and return of the pump approved. • Tuthill pumps are precision built and must be handled with care. • Pumps must be drained of all fluid and the ports plugged to prevent foreign material from getting into the pump.
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