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Tuthill AC, Installation And Service Instructions Manual

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Tuthill AC Installation And Service Instructions Manual Download Page 20

V1.4 

                                        20 of 22                                                    04/01/2009 

 

Inspection

 

•

  Check the pump housing, rotor, idler gear, idler pin and cover for wear and 

chipped or broken teeth. There must not be any deep scratches or grooves on the 
following: 

ID surface of the housing 
OD of the rotor 
End face of the rotor 
OD of the idler 

Either face of the idler 

Inside surfaces of the cover, including the crescent. 

•

  Replace worn parts as needed. 

•

  The rotor should be positioned in the housing or bracket and checked for 

clearance in the bearing. The shaft must turn freely without any detectable side 
play. Any side play will require replacement of the housing, bracket, rotor or all 
three parts. 

Assembly of Pump

 

•

  Clean all parts thoroughly using great care to eliminate all dirt. 

•

  Install the rotor in the pump bracket. 

•

  Position the selected gaskets over the mounting registers of the bracket and 

cover. 

Note: Gaskets are supplied with each pump so that proper internal clearances are 
maintained. In sizes 2 through 6, composite gaskets are supplied for standard pumping 
applications and consist of a steel shim enclosed in a Buna N rubber. Size 1 pumps 
utilize paper gaskets. The typical end clearances for these pumps are as follows: 

 

When pumping thinner viscosity fluids, fluids that are not compatible with Buna N, or a 
drop-off in capacity has occurred because of excessive end play of the rotor, paper or 
plastic shim type gaskets should be used. These are available from Tuthill as spare 
parts. The minimum end clearances for proper pump operation are as follows: 

 
Spare part number 

 

1C34.006 
2M34.003/.004/.005 
3M34.003/.004/.005 
5C34.003/.004/.005 

Pump size 

1 

2 

3&4 

5&6 

   Clearance 

. 

003 to .006" 

.004 to.009"  

.004 to.009"  

.007 to .010" 

Pump size 

 

 

1 
2 
3 & 4 
5 & 6 

Clearance 

 

.0005 to.001" 
.001 to .002" 
.002 to .003" 
.003 to .005" 

Summary of Contents for AC

Page 1: ...4 1 of 22 04 01 2009 Tuthill Pump Group 12500 South Pulaski Road Alsip IL 60803 USA o 708 389 2500 f 708 388 0869 Service Instruction No 22 Rev 3 04 08 INSTALLATION AND SERVICE INSTRUCTIONS C SERIES PUMPS ...

Page 2: ...Model C1F is a flange mount pump Model C1FA pumps are similar to model C1F but are supplied without a seal Model C1EN pumps are sleeve and ball bearing units with a lip seal and integral mounting foot designed for indirect belt chain gear drive The seal chamber on these pumps is vented to the suction side of the pumping zone Therefore the pump must operate in the direction for which it is assemble...

Page 3: ...g 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 Power applied to the rotor is transmitted to the idler gear with which it meshes The space between the outside diameter of the idler and the inside diameter of the rotor is sealed by the crescent As the pump starts the teeth come out of mesh increasin...

Page 4: ...um 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 Select a pipe size to reduce line friction loss to a minimum The pump should be located as close to the source of supply as conditions permit and if possible below the level of the liquid in the reservoir When necessary to locate the pump i...

Page 5: ...on should have a good foundation Its structure should be sufficiently strong to hold the pump rigid and to absorb any strain or shock that may be encountered The installation should be leveled checked for proper piping alignment and then fastened securely Method of Drive Direct drive through a traditional flexible coupling is recommended CC pumps are direct driven by the motor shaft as an integral...

Page 6: ...ernal relief valve except CC models are supplied with the standard spring with a range of 30 225 psi 10 200 psi in size 2 pumps set to provide full bypass relief at 90 psi The standard spring in CC model pumps has a range of 0 110 psi set to provide full bypass relief at 100 psi To adjust the relief setting within the range of a given spring s capability Remove the cap nut model CC pumps only With...

Page 7: ... as not to collapse under 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 Rapid or sudden introduction of liquid at an elevated tem...

Page 8: ...e is no discharge of liquid stop the pump and investigate the possible cause Failure to comply with this could cause severe damage to internal seals bushings and or metal parts Pump Performance Data Size Capacity gpm CC009 9 CC015 15 CC020 20 CC030 30 Based on pumping a fluid of 200 SSU viscosity at 50 psi and 1750 rpm Based on pumping a fluid of 100 SSU viscosity at 50 psi and 1750 rpm Size 1C 2C...

Page 9: ...ice Specific Models 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 If the pump is overheating it may be due to lack of lubricant Add lubricant as needed or at...

Page 10: ...tion If outfitted with an internal relief valve model ACV 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 RAC Remove the cover screws Rotate the cover 180 so that the boss on the cover points to the new suction inlet ...

Page 11: ...d This will eliminate possible damage to the lips of the packing and ease installation Replace the spring and packing retainer Be certain that the spring is properly located on the packing retainer and that the beveled surface of the packing retainer is facing the shaft end of the pump Install the V type packing rings Rings should be installed separately and not in sets Three rings are required pe...

Page 12: ... the cover screws Models C1E C1EN CIF and C1FA Seal Replacement Models C1E C1EN and C1F Grip the pump firmly across the ports and opposite side of the housing in a vise with the shaft end up For model C1EN only Note the location of the red vent plug This is the suction inlet side of the pump Loosen the setscrew on the collar of the outboard ball bearing While holding the pump shaft steady turn the...

Page 13: ... if on the left counterclockwise Behind this short vent plug is a small flow plug Remove both the long and short vent plugs as well as the small flow plug with a hex wrench Interchange the locations of the short vent plug and flow plug with the long vent plug Model C1 E C1 EN If outfitted with an internal relief valve models C1EV and C1ENV the rotation cannot be changed in the field unless the cov...

Page 14: ...t on pumps supplied with Tuthill s unique reversing feature models RC1F and RC1FA the following must be done in addition to the above steps When rotating the bracket also rotate the cover 180 Model C1B Seal Replacement Grip the pump firmly across the ports and opposite side of the housing in a vise with the shaft end up Remove any burrs or nicks on the shaft Use a small fine file if needed Remove ...

Page 15: ...ocation 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 Remove the cover screws so that the bracket moves freely Rotate the bracket 180 Align the mounting holes and reinstall the cover screws If outfitted with an internal relief valve model C1BV these pumps become rotational Rotation cannot be changed in the field unless the ...

Page 16: ...w enough clearance so that the rotor will turn freely The face of the housing should be even with the ends of the rotor teeth when gently pressed If there is not enough clearance the rotor will not turn freely causing severe scoring There cannot be any metal to metal contact between the rotor and the housing Replace the cover gaskets idler assembly and cover Lay the pump on the cover end Replace t...

Page 17: ...ddition to the steps above Remove the cover screws Rotate the cover 180 so that the boss on the cover points to the new suction inlet port Align the mounting holes and reinstall the cover screws Model CC Disassembly and Seal Replacement Remove the internal relief valve and gasket assembly if so equipped by loosening the four screws holding it to the pump housing Disconnect the pump from the motor ...

Page 18: ...ts are supplied with each pump so that proper internal end clearances are maintained The typical end clearance for CC model pumps is 003 to 005 When pumping thinner viscosity fluids or a drop off in capacity has occurred because of excessive endplay of the rotor removal of one or more of the cover gaskets may moderately improve performance Install the mechanical seal For model CC009 insert the spr...

Page 19: ...ump installation before completing the steps below Disconnect the drive so that it cannot be started while work is being performed Review the Material Data Safety 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 pumps contain re...

Page 20: ... the selected gaskets over the mounting registers of the bracket and cover Note Gaskets are supplied with each pump so that proper internal clearances are maintained In sizes 2 through 6 composite gaskets are supplied for standard pumping applications and consist of a steel shim enclosed in a Buna N rubber Size 1 pumps utilize paper gaskets The typical end clearances for these pumps are as follows...

Page 21: ...ing The coupling is defective or the tongue and groove are not engaged The relief valve setting is too low Liquid is discharging through the by pass port Capacity is too low There are leaks in the suction line Suction losses are too high The suction lift is too great or the suction line too small or too long This can be detected by installing a vacuum gauge directly at the pump suction The maximum...

Page 22: ...shaft Air leaks on suction side of pump or air entrainment in the fluid Pump leaks Cover bolts need tightening or cover gasket is defective Worn or defective seal Material Returns If it becomes necessary to return a pump to the factory a Return Goods Authorization RGA must be obtained from either your local Authorized Distributor or our Chicago plant No RGA can be issued until a completed Material...

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