Tuthill AC Quick guide

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Tuthill Pump Group
12500 South Pulaski Road
Alsip, IL 60803
USA
o708.389.2500
f708.388.0869
Service Instruction No. 22
Rev. 3 04/08
INSTALLATION AND SERVICE
INSTRUCTIONS
C SERIES PUMPS

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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. This pump is suitable for driving at direct motor speeds and will pump equally well
in either direction of rotation (unless supplied with an internal relief valve). It is equipped
with a sleeve bushing, aluminum packing and an adjustable packing gland.
Model C1G
Model C1G is similar to model AC except that it is equipped with spring loaded V type
leather packing. Model C1G pumps have the packing chamber vented to the suction side
of the pumping zone. Therefore, the pump must operate in the direction for which it is
assembled. Model C1G is 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.
Like the model AC, these pumps are available in four different mounting styles.
Models C1E, C1EN, CIF and C1FA
Model C1E and C1F pumps are sleeve bushing lip seal units designed for direct drive
service. Model C1E has an integral foot mount. 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 assembled.
All models are available in five sizes, ranging in capacity from 6 to 84 gpm with differential
pressures to 100 psi. The maximum discharge pressure capability is 100 psi.
Model C1B
Model C1B is a flange mount pump with two sleeve type bushings and a mechanical seal.
It is bi-rotational, unless equipped with an internal relief valve. This pump is available in
five sizes, with capacities from 6 to 84 gpm and differential pressures to 150 psi. The
maximum discharge pressure capability is 300 psi. A mounting foot is optional.
Model CKIB
Model CK1B pumps are equipped with a mechanical seal and incorporate heavy-duty
features, including special double bearing construction with an inboard double ball bearing
and an outboard roller bearing. This pump is available in five sizes, with capacities from 6
to 84 gpm and differential pressures to 250 psi. The maximum discharge pressure
capability is 300 psi. A mounting foot is optional.
The seal chamber is vented to the suction side. Therefore, the pump must operate in the
direction for which it is assembled.

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Model CC
Model CC pumps are designed to mount directly to NEMA 56 143 TC or 145 TC C Face
motors, with modifications available for mounting to metric C motors. They are equipped
with a mechanical seal and will pump equally well in either direction of rotation (unless
equipped with an internal relief valve).
These pumps are available in four sizes, with capacities from 6 to 30 gpm and can handle
inlet pressures to 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.
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,
increasing the volume. This creates a partial
vacuum, drawing the liquid into the pump through
the suction port.
The liquid fills the spaces between the teeth of the
idler and the rotor and is carried past the crescent
partition through the pressure side of the pump.
When the teeth mesh on the pressure side, the
liquid is forced from the spaces and out through the
discharge port.

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WARNING!
Failure to follow these instructions could result in serious bodily injury or death.
These pumps should not be used for handling plain water, corrosive or abrasive
liquids or liquids not possessing adequate lubricity.
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 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.
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. 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 in a pit, provisions should be made to safeguard against flooding. Care must be
taken to properly support the suction and discharge piping so that no strain is put on the
pump due to either weight or expansion. Piping strain can result in misalignment, hot
bearings, worn couplings, and vibration. It is important that the piping used be clean and
free of chips and scales.
Proper Installation
Unsatisfactory pump installations are usually characterized by poor suction conditions for
the specific liquid being handled. Suction conditions should be minimized to prevent
vaporization of the liquid. If vacuum conditions force the liquid to vaporize, cavitation will
occur, resulting in loss of capacity, premature wear and noisy operation.

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When handling high viscosity liquids, the speed of the pump must be reduced and the
size of the lines increased to prevent cavitation.
Note: Pipeline friction increases at a rapid rate with an increase in viscosity. For a given
pump and motor, larger pipelines are necessary to maintain the same pump pressure
when changing from a thin fluid to a thick one.
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. If it is necessary to install the pump with the ports pointing to
either side, it is recommended that the top port be the suction port. This will prevent
gravity-induced drainage of fluid through the suction port. When pipes are installed, an
inverted "U" bend should be incorporated into the suction line close to the pump for
priming purposes.
Viewing the pump from the shaft end, the inlet port is on the right for clockwise rotation
and on the left for counter-clockwise rotation. On pumps with built in relief valves, the
adjusting screw of the valve must always be located on the suction side of the pump.
Pumps should be filled with oil at installation and should never be allowed to run dry.
Every pump installation 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 part of the pump.) However, do not expect the
flexible coupling to compensate for misalignment. Contact the coupling manufacturer to
determine the maximum amount of misalignment to which the coupling can be subjected.
Model AC, C1B and CC pumps can be driven in either direction of rotation, unless
outfitted with an internal relief valve. All other C Series pumps are directional. Rotation
must be specified at the time of order. The seal chamber communicates with the neutral
zone and therefore the seal/packing is subjected to approximately one half of the
discharge pressure.
All pump and motor units must be properly aligned during assembly and periodically
checked since misalignment may occur later due to abuse or other conditions. Pipe
strain can force the pump and motor shafts out of alignment. Therefore, all piping to the
pump must be properly supported. Do not allow the pump to act as a pipe support.
Provide for proper expansion of pipes when handling hot liquids. Allow pump to reach
operating temperature slowly. Rapid temperature change can result in damage to the
cast iron components.

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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. As the pump rotates, liquid is
positively delivered to the discharge side of the pump. If the discharge line is closed off,
pressure will increase until the drive stalls and/or fails, the pump breaks or ruptures, or
the piping bursts. To prevent this from happening, the use of a pressure relief valve is
required. A relief valve that directs the flow back to the supply tank is recommended.
The internal relief valve available on C Series pumps is designed for overpressure
protection only. It is not intended as a flow control device or for any similar use.
Continuous operation of the relief valve will result in excessive heat buildup within the
pump cavity that could cause serious internal damage. Make certain the adjusting screw
of the relief valve is located on the suction side of the pump.
Unless otherwise specified at the time of order, all C Series pumps with an internal 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 a small wrench, hold the adjusting screw steady.
•With a second wrench, loosen the locking nut by rotating counterclockwise.
•Throttle the outlet line until the differential pressure at the pump port reaches the
desired level.
•If the pressure fails to reach this level with the throttling valve closed, turn the
adjusting screw inward (clockwise) until the desired pressure is reached.
(Adjusting clockwise raises the pressure setting.)
•If the pressure reaches the desired level before the throttling valve is completely
closed, turn the adjusting screw outward (counterclockwise) until the desired
pressure is reached. (Adjusting counterclockwise lowers the pressure setting.)
•Retighten the nut to lock the setting in place.
•Replace the cap nut (model CC pumps only).
•Recheck the pressure gauge reading.
If an internal relief valve has not been supplied with the pump some other means of
protection must be utilized. These include in-line safety relief valves, pressure shutdown
switches or other similar devices.

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Strainer Protection
Strainers are used to remove contaminated particles from the fluid system and extend
pump life. Every pump should be protected from these particles by a strainer in the
suction line.
Strainer size and mesh of screen are determined by the rate of flow and viscosity of the
fluid. Consult the strainer manufacturer for recommendations.
Never use a strainer with a built-in automatic by-pass on the suction line set to open
under 30" Hg. vacuum.
Install the strainer according to the designated direction of flow, locating it so that it is
accessible for servicing. Use a duplex type strainer when shutdown during service is not
possible.
Provide a vacuum gauge in the suction line for determining when the strainer requires
cleaning. Make certain strainer baskets are properly reinforced so 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 temperature
into the cold liquid chamber of the pump could cause damage to the seal or other internal
parts.
Do not run the pump dry. This could cause severe damage to the seal, bushings and/or
metal parts.
Startup
Prior to starting the pump double check the following:
•Pressure and vacuum gauges should be installed as close as possible to the
pump.
•Rotate pump shaft to ensure it turns freely without binding.
•Recheck alignment and ensure all guards are in place.
•Make sure piping is independently supported and no strain is being transmitted to
the pump.
•Make sure the safety relief valve is installed correctly.
•Check pump rotation.

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•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.
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
3C
4C
5C
6C
Capacity (gpm)
3
8
17
36
61
84

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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 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.
Service - 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 least every 60 days or 500 hours of operation.
Repacking
•Grip the pump firmly across the ports and opposite side of the housing in a vise
with the shaft end up.
•Remove the lock wire and packing gland screws.
•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.
•Slide the packing gland off the shaft.
•Remove the old packing from the bracket.
•Inspect the shaft. If the shaft is too badly worn or scored at the packing area,
the rotor must be replaced.

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•Position the new packing over the shaft and slide into the bracket.
•Install the packing gland and the screws. Take care when tightening up the
packing gland screws so as not to cause undue pressure in the stuffing box.
Pull up firmly on the packing gland screws, back off to finger tight and lock the
screws in place with the lock wire.
Aluminum packing is the standard in models 1AC through 6AC.Following is a table of packing
sizes:
Size ID OD Length
1 1/2" 55/64" 5/8"
2 5/8" 59/64" 3/4"
3 & 4 3/4" 1 1/8" 3/4"
5 & 6 1" 1 1/2" 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.
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)
port.
• Align the mounting holes and reinstall the cover screws.
Model C1G
Lubrication
Model C1G 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 least every 60 days or 500 hours of operation.

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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.
•Remove the two packing gland screws at the shaft end and slide the packing
gland assembly off the shaft.
•Remove the old packing, packing retainer and spring.
•Inspect the shaft. If badly scored, the rotor must be replaced.
•Clean the packing chamber thoroughly. Carefully remove any sharp ridges
from the shaft end. 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 per pump. Exercise care when sliding the rings
into place so that the lips of the packing rings are stacked in line and
positioned on the beveled surface of the packing retainer ring.
•Replace the packing gland assembly and fasten it securely to the bracket
assembly with the packing gland screws. The tension of the spring is such that
normal wear on the packing is taken up automatically.

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Changing Rotation
Looking at the pump from the shaft end with the ports up, locate the short vent plug
(painted red). This is the suction (inlet) side of the pump. If on the right, rotation is
clockwise; if on the left, counterclockwise. On the opposite side is a long vent plug.
Remove both plugs and
interchange locations.
Location of short vent
plug for counterclockwise
rotation.
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:
•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.
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 collar away from the red
vent plug to loosen it. Remove the collar from the shaft.
•Remove the three screws and slide the seal housing cap assembly off the shaft.
•Pry the seal from the housing cap and clean out the seal cavity with a cloth.
Press the new seal into the housing cap with the lip spring side facing the
mounting face.
•Inspect the shaft. If badly scored at the seal area, the rotor must be replaced.
Carefully remove any sharp edges from the shaft and polish with crocus cloth or
very fine sandpaper. This will eliminate possible damage to the seal lip and ease
installation.
•Install new gasket into bracket if necessary.
Location of short vent plug
for clockwise rotation.

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•Apply a dab of petroleum jelly to the seal lip and install it over the shaft. (If the
seal is EPR, apply a silicon-based lubricant). The seal lip must retain its position
on the shaft. Work the housing cap assembly up and down the shaft to make
certain the seal lip slides freely.
•Align the holes in the housing cap with the holes in the bracket and reinstall the
three screws.
Changing Rotation - Models C1E and C1EN
Looking at the pump from the shaft end with the ports up, locate the short vent plug
(painted red). This is the suction (inlet) side of the pump. If on the right side, rotation is
clockwise; 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 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:
•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.
LONG VENT PLUG
Gaskets

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Changing Rotation - Models C1F and C1FA
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.
•Remove the cover screws so that the bracket moves freely.
•Rotate the bracket 180°.
•Align the mounting holes and reinstall the cover screws.
Model C1F, C1FA
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:
•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 the bearing cap screws.
•Slide the bearing cap off the shaft.
•Remove the stationary seat of the seal from the bearing cap.
•Slide the seal cartridge off the shaft.
•Polish the pump shaft with crocus cloth or very fine sandpaper and clean the seal
chamber thoroughly with a clean cloth. This will prevent damage to the new seal
and ease installation.
•Place the new seal cartridge on the shaft and slide into place.
V Notch

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•Install the new stationary seat into the bearing cap.
•Place the bearing cap on the shaft and slide into place.
•Align the mounting holes and reinstall the bearing cap screws
Changing Rotation
Model C1B pumps manufactured after 1996 are bi-directional and will work equally well in
either direction of rotation with no modification. Older C1B pumps are directional, carrying
model designations of C1B-C or C1B CC.
To change the rotation of these pumps:
•Look at the pump from the shaft end with the ports up and 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.
•• 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 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):
•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 C1B
V Notch

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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.
•Press out the rotor from the shaft end. The inner bearing sleeve will pop off.
•Remove the seal from the rotor shaft.
•Remove the housing plug.
•Remove the stationary seat from the bearing housing.
•Inspect the rotor for scratches, burrs or gouges. Removal of the inner bearing
sleeve will frequently score the rotor shaft, necessitating replacement of the rotor.
•Inspect all internal parts for wear or damage. Replace any parts as needed.
•To reassemble the pump, first slide the washer and ball bearing over the rotor
shaft.
•Replace the shims in the housing, using the same thickness as before.
•This step is extremely important. Insert the rotor with the washer and ball
bearing into the housing. The shims should allow 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 the washer over the ball bearing on the
rotor shaft.
•Apply a dab of petroleum jelly over the rotor shaft. (If the seal is EPR, apply a
silicon-based lubricant).
•Slide the replacement mechanical seal over the shaft and down until it seats
against the retaining ring.
•With the smooth face up, press the stationary seat into the bearing housing.
•Install the new lip seal into the housing plug.
•Slide the housing plug assembly over the shaft and press it into place.
•Replace the inner sleeve from the roller bearing. Press over the rotor shaft until it
is flush with the seal on the housing plug.
•Replace the bearing housing (still containing the roller bearing) on the rotor shaft.
•Test the pump by turning by hand. Use a small wrench on the shaft over the flat.
The pump will turn with some drag from seal tension, but there should be no
binding or high spots.

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Changing Rotation
Looking at the pump from the shaft end with the ports up, locate the short vent plug
(painted red). This is the suction (inlet) side of the pump. If on the right, rotation is
clockwise; if on the left, counterclockwise. On the opposite side is a long vent plug.
Remove both plugs and interchange locations.
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:
•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 by removing the four screws holding them
together. Using three of these screws as jackscrews in the threaded holes
provided on the pump flange, pull the pump from the motor. Save the key from
the motor shaft.
•Mark the position of the cover in relation to the housing.
•Remove the cover screws, cover and idler.
Top View
Rotation
Location of short vent plug for
clockwise rotation Location of short vent plug for
counter clockwise rotation
Model CK1B

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•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.
•For model CC009, remove the retaining ring in the bore of the motor mounting
and the mechanical seal.
•For models CC015, CC020 and CC030, remove the seal spring and rotating
member from the rotor and the seal seat from the housing.
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.
Assembly of Pump
•Place the idler onto the cover assembly.
•Position the gaskets on the cover.
Note: Gaskets 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 spring, rotating member
and seal seat into the seal bore cavity. Reinstall the retaining ring. For models
CC015, CC020 and CC030, place the spring and rotating member on the rotor
and insert the seal seat into the housing bore. A light lubricant will aid this
procedure.
•Install the rotor. It should go in without much force.
•Replace the cover/idler/gasket assembly. 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.
•Install the relief valve and gasket assembly, making sure the adjusting screw
points to the suction side of the pump.
•Check the end clearance.
•Reconnect the pump to the motor, making sure the key has been installed on the
motor shaft and the four screws are securely fastened.

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Changing Rotation
Model CC pumps are bi-directional and will work equally well in either direction of rotation
with no modification.
If outfitted with an internal relief valve (model CCV), these pumps become rotational. To
change rotation:
•Remove the four screws holding the relief valve and gasket assembly to the
housing.
•Rotate the relief valve and gasket assembly 180° so that the adjusting screw
points to the new suction side of the pump.
•Replace the four screws.
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 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 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.
Service - All Models Except CC
Disassembly of Pump
The seal or packing must be removed before the pump can be disassembled.
• Mark the cover, housing and bracket for proper re-assembly.
• Remove the cover screws, cover, housing, idler and rotor from the bracket.

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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"