Tuthill 6000 Quick guide

Service Manual #67
Installation and Service
Instructions
6000, 7000 & 8000 Series
Magnetically Coupled Pumps

Service Manual # 67
Page 2of 36
Table of Contents
Section Description Page
1General Description 4
2The Pumping Principle 5
3Proper Installation 5
4Pressure Limitations 6
5Magnet Temperature Limitations 7
6Optional Equipment 7
7Method Of Drive 8
8Location 8
9Strainer Protection 8
10 Startup 9
11 Pump Disassembly Procedure -6110 & 7110 Pumps 9
12 Pump Disassembly Procedure -6200 Pumps 11
13 Pump Disassembly Procedure -6210 Pumps 13
14 Pump Disassembly Procedure -6300, 7200 & 8200 Pumps 15
15 Pump Disassembly Procedure -6310, 7210 & 8210 Pumps 16
16 Pump Assembly Procedure -6110 & 7110 Pumps 18
17 Pump Assembly Procedure -6200 Pumps 20
18 Pump Assembly Procedure -6210 Pumps 22
19 Pump Assembly Procedure -6300, 7200 & 8200 Pumps 24
20 Pump Assembly Procedure -6310, 7210 & 8210 Pumps 26
21 Troubleshooting 34
22 Material Returns 35
!WARNING
The magnets in magnetically coupled pumps create very strong magnetic fields. Special care must
be taken with the following:
Pacemakers -Magnets can upset the timing of pacemakers. These magnets should be kept away
from all pacemakers. Because of the health risks involved the importance of this cannot be
overstated.
Credit Cards -Magnets can scramble the information on a credit card’s magnetic tape.
Computers, Computer Tapes and Computer Disks -Magnets can scramble the information on
the memory device.
Watches -Magnets can affect the workings of traditional mechanical spring driven watches as well
as chip and electronically controlled designs.
Electronic Instruments -Sensitive electronic instruments and devices may change calibration or
be damaged by a powerful magnetic field.
Explosive Atmosphere -Rare earth magnets and magnetic materials may create sparks through
contact in handling. Never handle rare earth magnets in explosive atmospheres because sparking
may ignite the atmosphere.
Note: This manual replaces Service Manuals #66, 77 & 88.

Service Manual # 67
Page 3of 36
!WARNING
Magnetically coupled pumps (SEALLESS -as defined by the Hydraulic Institute) do not contain any
dynamic seals. The possibility of leakage is therefore greatly reduced.
However, all materials are subject to wear and stress which can eventually lead to a failure,
resulting in leakage. Without proper safeguards, leakage of hazardous fluids is potentially
dangerous and can cause serious injury or death, or create an environmental hazard.
Users must understand and deal with this potential danger regardless which manufacturer’s pump is
used. If the fluid being pumped is hazardous, appropriate monitoring must be employed to provide
early warning of any leakage. If you are unsure of the methods available to monitor your application,
you should contact capable engineering firms for design guidance.
Magnetically coupled pumps may decouple and must be stopped to re-engage. Operation of a
decoupled unit may destroy the magnets and will result in a serious danger of explosion when
handling fluids with a low flash point because of very rapid heat buildup.
Magnetically coupled pumps are not designed to be run dry.
!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 hydraulic 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 Manual # 67
Page 4of 36
Section 1: General Description
The Tuthill 6000, 7000 & 8000 Series pumps are magnetically-coupled versions of the Tuthill 4000 &
ST Series pumps. These pumps operate on the internal gear pumping principle described below.
These pumps do not contain any dynamic seals, thus eliminating any possibility of shaft seal
leakage. The available models are shown in Table 1.
max
speed
(inch)
(mm)
(usgpm)
(lpm)
(rpm)
(psi)
(bar)
6113
1/2
*
1.7
6
1800
500
34.5
6114
1/2
*
3
11
1800
500
34.5
6115
1
*
5.5
21
1800
500
34.5
6202
1
*
9
34
1800
100
6.9
6203
1 1/4
*
18
68
1800
100
6.9
6204
1 1/2
*
37
140
1800
100
6.9
6205
1 1/2
*
62
235
1800
100
6.9
6206
2
*
84
318
1800
100
6.9
6302
1
25
9
34
1800
200
13.8
6303
1 1/2
40
15
57
1800
200
13.8
6304
1 1/2
40
30
114
1800
200
13.8
6305
2
50
50
189
1500
200
13.8
6306
2 1/2
65
80
303
1500
200
13.8
6307
3
80
135
511
1200
200
13.8
7114
1
*
2.8
11
1800
200
13.8
7115
1
*
5.6
21
1800
200
13.8
7202
1
25
6
23
1200
150
10.3
7203
1 1/2
40
10
38
1200
150
10.3
7204
1 1/2
40
20
76
1200
150
10.3
7205
2
50
33
125
1000
150
10.3
7206
2 1/2
65
53
201
1000
150
10.3
7207
3
80
90
341
800
150
10.3
8202
1
25
9
34
1800
200
13.8
8203
1 1/2
40
15
57
1800
200
13.8
8204
1 1/2
40
30
114
1800
200
13.8
8205
2
50
50
189
1500
200
13.8
8206
2 1/2
65
80
303
1500
200
13.8
8207
3
80
135
511
1200
200
13.8
* metric ports not available in these sizes
max pressure
cast iron
stainless steel
carbon steel
Materials of
Construction pump size std port size max capacity
Table 1 -Models Available

Service Manual # 67
Page 5of 36
Section 2: The Pumping Principle
Figure 1 -Internal Gear Pumping Principle
Tuthill 6000, 7000 & 8000 Series pumps employ the internal gear pumping principle (see Figure 1).
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.
Section 3: 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.
For optimum pump performance, the suction line must be at least as large as the corresponding
pump port. It should be as short as possible in order to avoid excessive pressure drops and must
be airtight. The placement of a strainer on the suction side of the pump will restrict any solids or
abrasives from entering the pump which could cause internal damage.
Note: Pipe line friction increases at a rapid rate with an increase in viscosity. For a given pump and
motor, larger pipe lines are necessary to maintain the same pump pressure when changing from a
thin fluid to a thick one.
When handling high viscosity liquids, the speed of the pump must be reduced and the size of the
lines increased to prevent cavitation.

Service Manual # 67
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Under no conditions should the pump be used to support external piping loads. Piping and other
equipment should be independently supported.
The discharge line must be designed with the maximum pressure rating of the pump in mind.
Excessive pressure could cause damage to your motor and/or pump. If a pressure relief valve has
not been supplied with the pump, some other means of pressure protection must be utilized. This
could include in-line safety valves, pressure shutdown switches or other similar devices.
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.
Pumps should be filled with fluid at installation and should never be allowed to run dry.
6000, 7000 & 8000 Series pumps have internal venting which makes them directional. The direction
of rotation is specified from the shaft end of the pump. Unless otherwise specified, rotation is
assumed to be clockwise (CW), which places the suction port on the right side of the pump when
viewed from the shaft end. Operation of the pump in a direction other than specified can cause
damage to both the pump and magnets.
Consult Tuthill personnel whenever unusual conditions of speed, pressure, vacuum or viscosity are
encountered.
The Tuthill pump is a positive displacement pump. 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 magnets de-couple, the drive equipment stalls and/or fails, the pump breaks or
ruptures, or the piping bursts. This could result in serious bodily injury or death. 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.
Pumps shipped from the factory with relief valves are assembled for clockwise or counterclockwise
rotation as originally specified. The adjusting screw must always point toward the suction line. If
you want to change rotation, the relief valve assembly must be removed and turned 180°, and the
bracket must be rotated 180°.
Section 4: Pressure Limitations
Standard models have pressure ratings as shown in Table 1. Standard canisters are designed to
withstand the maximum rated discharge pressure of the pump. The internal venting arrangement
will normally result in a pressure in the canister that is less than the discharge pressure.
!WARNING
Exceeding the maximum canister pressure may cause a canister failure resulting in the release of
the fluid being pumped. Refer to the Optional Equipment section for options available for safely
addressing this concern.
Consult the factory regarding any applications where the canister pressure is in question.

Service Manual # 67
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Section 5: Magnet Temperature Limitations
Standard pumps are supplied with magnets constructed of Neodymium-Iron-Boron. These magnets
cannot exceed a maximum temperature of 250° F (120° C). Operation above the maximum
temperature will result in a permanent reduction in magnet strength. Samarium-Cobalt magnets are
available as an option and have a maximum temperature rating of 500° F (260° C). Generally, all
magnets subjected to temperatures above their maximum rating will lose a portion or all of their
magnetic strength.
To prevent damage to the magnets, use of a temperature sensor is recommended. Refer to Section
6: Optional Equipment for further details.
Section 6: Optional Equipment
Sensing equipment must be installed to immediately shut down the system when any abnormality
is detected.
Secondary Control
This feature converts the outer pump adapter into a secondary control chamber. In the
event of fluid leakage from the primary chamber, this option provides a temporary backup
system for preventing leakage into the environment, with proper sensing devices. Use of
secondary control is recommended when handling hazardous or toxic fluids. Secondary
control cannot be expected to contain pressure or significant fluid loss.
Provided with this option are two tapped ports in the outer pump adapter, which will
accommodate various sensors:
•Leak Sensor -Installed into the lower tapped port, it monitors for fluid within the
secondary containment chamber to indicate inner canister failure.
•Temperature Sensor -Installed into the upper tapped port, it monitors canister
temperature to help prevent magnet damage due to excessive heat.
•Cooling Jacket -Utilizes both tapped ports and the secondary control chamber to
disperse heat from the canister and magnets.
Pumps must be inspected weekly to verify the integrity of the secondary control feature.
More frequent inspection may be necessary, dependent on the specific application.
Bracket Access
This option incorporates two access holes in the pump bracket to provide a direct passage
to the inner magnet for use as follows:
•Pressure Sensor -monitors pressure in the inner canister.
•Flush -allows for flushing of canister chamber.
•Drain -allows for draining of canister chamber.

Service Manual # 67
Page 8of 36
Section 7: Method Of Drive
Direct drive through a traditional flexible coupling is recommended. However, do not expect the
flexible coupling to compensate for misalignment. Contact the coupling manufacturer to determine
the maximum amount of misalignment which the coupling can tolerate.
All pump and motor units must be properly aligned during assembly and periodically checked since
misalignment may occur later due to changing conditions.
Pipe strain can force the pump and motor shaft 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
temperatures and then re-check alignment.
Provide sufficient clearance, 1/16 -1/18 inches (1.5 -3 mm) between coupling halves with shaft in
closest operating position.
Never depend upon sight or feel. Use proper gauges when aligning a pump.
Never operate pump without all guards in place.
Section 8: Location
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 or scales.
Section 9: 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 is determined by rate of flow and viscosity of fluid. Consult
strainer manufacturer for recommendations.
Never use a strainer with built-in automatic by-pass on the suction line set to open under 30 inch
(750 mm) Hg. vacuum.
Install strainer according to the designated direction of flow.
Have strainer accessible for servicing.
Use a duplex type strainer when shutdown during service is not permitted.
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 inch (750 mm)
Hg. vacuum.

Service Manual # 67
Page 9of 36
Section 10: Startup
!WARNING
Follow all precautions outlined in the Material Safety Data Sheet (MSDS) applicable to the liquid
being pumped to ensure safe handling.
All Tuthill pumps contain residual hydraulic 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.
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.
•Open suction and discharge gate valves.
•Check for any leaks once gate valves are open.
•Check pump rotation.
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 magnets, bushings and/or metal parts.
Section 11: Pump Disassembly Procedure -6110 & 7110 Pumps
Refer to Figure 3 (6110) & Figure 4 (7110).
Although some minor disassembly is possible with the complete pump/motor assembly still in
place, it is recommended that the pump/motor unit be disconnected and moved to a maintenance
area.
!WARNING
Residual pumped fluid will be present in the pump. Follow all precautions outlined in the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to ensure safe handling.

Service Manual # 67
Page 10 of 36
1. Remove piping from the ports.
2. Mark cover and housing before disassembly to ensure proper reassembly.
3. Remove the cover screws, cover and idler.
4. Inspect the following parts carefully for deep grooves, scratches or other damage:
•The end face of the rotor
•The O.D. of the idler
•The I.D. of the idler.
•Both faces of the idler.
•The O.D. of the idler pin.
•The inside surfaces of the cover including the crescent.
5. Check for signs of wear. A decrease in capacity is generally caused by the abrasive action of
foreign materials in the liquid, resulting in excessive end clearances. End clearance can be
reduced by changing to a thinner cover gasket. To adjust the end clearance, see assembly
procedure.
!CAUTION
The pump must be separated from the magnet coupling if further disassembly is required. Follow
the instructions below.
The housing, rotor and inner magnet can be removed by hand.
DO NOT PLACE HAND OR FINGERS BETWEEN THE HOUSING AND ADAPTER. The magnets
are extremely strong and will attract all metallic objects and can be the source of pinch points. Do
not wear watches or other metallic jewelry when working with magnets. See warning on Page 2.
Failure to follow proper procedures or use appropriate tools could result in injury to you or damage
to either personal property or the pump.
6. Remove the housing screws.
7. Remove the pump head assembly from the adapter, making sure to pull it straight off.
8. Remove the canister from the housing. The canister will probably contain pumping residue.
Use care when removing, making sure to pull the canister straight off. Inspect the canister I.D.
and O.D. for evidence of contact or wear.
9. Set the housing, rotor and inner magnet assembly face-down. Remove the retaining ring, inner
magnet and key.
10. Set the magnet down on a clean, non-magnetic surface. Inspect the magnet sleeve for
evidence of damage or excessive wear and cover with a cloth to prevent contamination.
11. Check the shaft O.D. for any burrs and remove to prevent damage to the housing bushing.

Service Manual # 67
Page 11 of 36
12. Inspect the following parts carefully for deep grooves, scratches or other damage:
•The I.D. surface of the housing.
•The back face of the rotor.
•The back face of the housing bushing.
•The O.D. of the rotor.
13. Inspect the bushings in the housing for wear.
14. Do not remove the o-ring from the housing unless it is worn or damaged and needs
replacement.
Section 12: Pump Disassembly Procedure -6200 Pumps
Refer to Figure 5.
Although some minor disassembly is possible with the complete pump/motor assembly still in
place, it is recommended that the pump/motor unit be disconnected and moved to a maintenance
area.
!WARNING
Residual pumped fluid will be present in the pump. Follow all precautions outlined in the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to ensure safe handling.
1. Remove piping from the ports.
2. Mark cover, housing and bracket before disassembly to ensure proper reassembly.
3. Remove the cover screws, cover, housing and idler.
4. Inspect the following parts carefully for deep grooves, scratches or other damage:
•The I.D. of the housing.
•The end face of the rotor.
•The O.D. of the rotor.
•The O.D. of the idler.
•The I.D. of the idler.
•Both faces of the idler.
•The O.D. of the idler pin.
•The inside surfaces of the cover including the crescent.
5. Check for signs of wear. A decrease in capacity is generally caused by the abrasive action of
foreign materials in the liquid, resulting in excessive end clearances. End clearance can be
reduced by changing to a thinner cover gasket. To adjust the end clearance, see assembly
procedure.

Service Manual # 67
Page 12 of 36
!CAUTION
The pump must be separated from the magnet coupling if further disassembly is required. Follow
the instructions below.
Use jack screws to disassemble models 6200 Series pumps. Jack screw kits are available as part
number 2CMG 558 for models 6202, 6203 and 6204 and part number 5CMG 558 for models 6205
and 6206.
DO NOT PLACE HAND OR FINGERS BETWEEN THE HOUSING AND ADAPTER. The magnets
are extremely strong and will attract all metallic objects and can be the source of pinch points. Do
not wear watches or other metallic jewelry when working with magnets. See warning on Page 2.
Failure to follow proper procedures or use appropriate tools could result in injury to you or damage
to either personal property or the pump.
6. Remove the screws that attach the bearing housing / outer magnet sub-assembly to the
adapter.
7. Use jack screws to separate the inner and outer magnets:
a. Place (3) guide studs into adapter at screw locations and hand tighten.
b. Place (1) threaded stud into bearing housing and slowly turn the threaded stud to jack the
bearing housing / outer magnet sub-assembly out.
c. Continue turning the threaded stud until separation of the inner and outer magnet is
complete.
8. Remove pump bracket, rotor and canister sub-assembly from adapter.
9. Remove the canister from the bracket. The canister will probably contain residual pumping
fluid. Use care when removing, making sure to pull the canister straight off.
10. Remove the back retaining ring and remove the inner magnet.
11. Set magnet down on a clean, non-magnetic surface, inspect the magnet sleeve for evidence of
damage or excessive wear and cover with a cloth to prevent contamination.
12. Remove the front retaining ring (if equipped). Check the shaft O.D. for any burrs and remove to
prevent damage to the bracket bushings.
13. Remove the rotor from the bracket.
14. The back face of the rotor and the bracket face should be inspected for any deep scratches or
wear. Inspect the bushing in the bracket for wear.
15. Do not remove the o-ring from the bracket unless it is worn or damaged and needs replacement.

Service Manual # 67
Page 13 of 36
Section 13: Pump Disassembly Procedure -6210 Pumps
Refer to Figure 6.
Although some minor disassembly is possible with the complete pump/motor assembly still in
place, it is recommended that the pump/motor unit be disconnected and moved to a maintenance
area.
!WARNING
Residual pumped fluid will be present in the pump. Follow all precautions outlined in the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to ensure safe handling.
1. Remove piping from the ports.
f
2. Remove the cover screws, cover, housing and idler.
3. Mark cover, housing and bracket before disassembly to ensure proper reassembly.
4. Inspect the following parts carefully for deep grooves, scratches or other damage:
•The I.D. of the housing.
•The end face of the rotor.
•The O.D. of the rotor.
•The O.D. of the idler.
•The I.D. of the idler.
•Both faces of the idler.
•The O.D. of the idler pin.
•The inside surfaces of the cover including the crescent.
5. Check for signs of wear. A decrease in capacity is generally caused by the abrasive action of
foreign materials in the liquid, resulting in excessive end clearances. End clearance can be
reduced by changing to a thinner cover gasket. To adjust the end clearance, see assembly
procedure.

Service Manual # 67
Page 14 of 36
!CAUTION
The pump must be separated from the magnet coupling if further disassembly is required. Follow
the instructions below.
Use jack screws to disassemble models 6210 Series pumps. Jack screw kits are available as part
number 2CMG 558 for models 6212, 6213 and 6214 and part number 5CMG 558 for models 6215
and 6216.
DO NOT PLACE HAND OR FINGERS BETWEEN THE BRACKET AND ADAPTER. The magnets
are extremely strong and will attract all metallic objects and can be the source of pinch points. Do
not wear watches or other metallic jewelry when working with magnets. See warning on Page 2.
Failure to follow proper procedures or use appropriate tools could result in injury to you or damage
to either personal property or the pump.
6. Remove the screws that attach the bearing housing / outer magnet sub-assembly to the
adapter.
7. Use jack screws to separate the inner and outer magnets:
a. Place (3) guide studs into adapter through the bracket screw clearance holes and hand-
tighten.
b. Place (1) threaded stud into a bracket screw threaded hole and slowly turn the threaded
stud to jack the bracket / rotor / inner magnet sub-assembly out.
c. Continue turning the threaded stud until separation of the inner and outer magnet is
complete.
8. Remove bracket / rotor / inner magnet sub-assembly from adapter.
9. Remove the canister from the bracket. The canister will probably contain residual pumping
fluid. Use care when removing, making sure to pull the canister straight off. Inspect the
canister I.D. and O.D. for evidence of contact or wear.
10. Set the bracket / rotor / inner magnet assembly face-down. Remove the retaining ring, inner
magnet and key.
11. Set the magnet down on a clean, non-magnetic surface. Inspect the magnet sleeve for
evidence of damage or excessive wear and cover with a cloth to prevent contamination.
12. Remove the front retaining ring (if equipped). Check the shaft O.D. for any burrs and remove to
prevent damage to the bracket bushings.
13. Remove the rotor from the bracket.
14. The back face of the rotor and the bracket face should be inspected for any deep scratches or
wear. Inspect the bushings in the bracket for wear.
15. Do not remove the o-ring from the housing unless it is worn or damaged and needs
replacement.

Service Manual # 67
Page 15 of 36
Section 14: Pump Disassembly Procedure -6300, 7200 & 8200 Pumps
Refer to Figure 7.
Although some minor disassembly is possible with the complete pump/motor assembly still in
place, it is recommended that the pump/motor unit be disconnected and moved to a maintenance
area.
!WARNING
Residual pumped fluid will be present in the pump. Follow all precautions outlined in the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to ensure safe handling.
1. Remove piping from the ports.
2. Mark cover, housing and bracket before disassembly to ensure proper reassembly.
3. Remove the cover screws, cover, housing and idler.
4. Inspect the following parts carefully for deep grooves, scratches or other damage:
•The I.D. of the housing.
•The end face of the rotor.
•The O.D. of the rotor.
•The O.D. of the idler.
•The I.D. of the idler.
•Both faces of the idler.
•The O.D. of the idler pin.
•The inside surfaces of the cover including the crescent.
5. Check for signs of wear. A decrease in capacity is generally caused by the abrasive action of
foreign materials in the liquid, resulting in excessive end clearances. End clearance can be
reduced by adjusting the thrust bearing. To adjust the end clearance, see assembly procedure.
!CAUTION
The pump must be separated from the magnet coupling if further disassembly is required. Follow
the instructions below.
Use jack screws to disassemble models 6300, 7200 & 8200 Series pumps. Jack screw kits are
available as part number 2CMG 558 for models 6302-4, 7202-4 & 8202-4 and part number 5CMG
558 for models 6305-6, 7205-6 & 8205-6.
DO NOT PLACE HAND OR FINGERS BETWEEN THE HOUSING AND ADAPTER. The magnets
are extremely strong and will attract all metallic objects and can be the source of pinch points. Do
not wear watches or other metallic jewelry when working with magnets. See warning on Page 2.
Failure to follow proper procedures or use appropriate tools could result in injury to you or damage
to either personal property or the pump.
6. Remove the screws that attach the bearing housing / outer magnet sub-assembly to the
adapter.

Service Manual # 67
Page 16 of 36
7. Use jack screws to separate the inner and outer magnets:
a. Place (3) guide studs into adapter at screw locations and hand-tighten.
b. Place (1) threaded stud into bearing housing and slowly turn the threaded stud to jack the
bearing housing / outer magnet sub-assembly out.
c. Continue turning the threaded stud until separation of the inner and outer magnet is
complete.
8. Remove pump bracket, rotor and canister sub-assembly from adapter.
9. Remove the canister from the bracket. The canister will probably contain residual pumping
fluid. Use care when removing, making sure to pull the canister straight off.
10. Remove the back retaining ring and remove the inner magnet.
11. Set magnet down on a clean, non-magnetic surface, inspect the magnet sleeve for evidence of
damage or excessive wear and cover with a cloth to prevent contamination.
12. Remove the front retaining ring (if equipped).
13. Loosen the setscrews and remove the adjusting ring. Check for excessive wear. Check the
shaft O.D. for any burrs and remove to prevent damage to the bracket bushings.
14. Remove the rotor from the bracket.
15. The back face of the rotor and the bracket face should be inspected for any deep scratches or
wear. Inspect the bushing in the bracket for wear.
16. Do not remove the o-ring from the bracket unless it is worn or damaged and needs replacement.
Section 15: Pump Disassembly Procedure -6310, 7210 & 8210 Pumps
Refer to Figure 8.
Although some minor disassembly is possible with the complete pump/motor assembly still in
place, it is recommended that the pump/motor unit be disconnected and moved to a maintenance
area.
!WARNING
Residual pumped fluid will be present in the pump. Follow all precautions outlined in the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to ensure safe handling.
1. Remove piping from the ports.
2. Remove the cover screws, cover, housing and idler.

Service Manual # 67
Page 17 of 36
3. Mark cover, housing and bracket before disassembly to ensure proper reassembly.
4. Inspect the following parts carefully for deep grooves, scratches or other damage:
•The I.D. of the housing.
•The end face of the rotor.
•The O.D. of the rotor.
•The O.D. of the idler.
•The I.D. of the idler.
•Both faces of the idler.
•The O.D. of the idler pin.
•The inside surfaces of the cover including the crescent.
5. Check for signs of wear. A decrease in capacity is generally caused by the abrasive action of
foreign materials in the liquid, resulting in excessive end clearances. End clearance can be
reduced by changing to a thinner cover gasket. To adjust the end clearance, see assembly
procedure.
!CAUTION
The pump must be separated from the magnet coupling if further disassembly is required. Follow
the instructions below.
Use jack screws to disassemble models 6310, 7210 & 8210 Series pumps. Jack screw kits are
available as part number 2CMG 558 for models 6312-4, 7212-4 & 8212-4 and part number 5CMG
558 for models 6315-6, 7215-6 & 8215-6.
DO NOT PLACE HAND OR FINGERS BETWEEN THE BRACKET AND ADAPTER. The magnets
are extremely strong and will attract all metallic objects and can be the source of pinch points. Do
not wear watches or other metallic jewelry when working with magnets. See warning on Page 2.
Failure to follow proper procedures or use appropriate tools could result in injury to you or damage
to either personal property or the pump.
6. Remove the screws that attach the bearing housing / outer magnet sub-assembly to the
adapter.
7. Use jack screws to separate the inner and outer magnets:
a. Place (3) guide studs into adapter through the bracket screw clearance holes and hand-
tighten.
b. Place (1) threaded stud into a bracket screw threaded hole and slowly turn the threaded
stud to jack the bracket / rotor / inner magnet sub-assembly out.
c. Continue turning the threaded stud until separation of the inner and outer magnet is
complete.

Service Manual # 67
Page 18 of 36
8. Remove bracket / rotor / inner magnet sub-assembly from adapter.
9. Remove the canister from the bracket. The canister will probably contain residual pumping
fluid. Use care when removing, making sure to pull the canister straight off. Inspect the
canister I.D. and O.D. for evidence of contact or wear.
10. Set the bracket / rotor / inner magnet assembly face-down. Remove the retaining ring, inner
magnet and key.
11. Set the magnet down on a clean, non-magnetic surface. Inspect the magnet sleeve for
evidence of damage or excessive wear and cover with a cloth to prevent contamination.
12. Remove the front retaining ring (if equipped).
13. Loosen the setscrews and remove the adjusting ring. Check for excessive wear. Check the
shaft O.D. for any burrs and remove to prevent damage to the bracket bushings.
14. Remove the rotor from the bracket.
15. The back face of the rotor and the bracket face should be inspected for any deep scratches or
wear. Inspect the bushings in the bracket for wear.
16. Do not remove the o-ring from the housing unless it is worn or damaged and needs
replacement.
Section 16: Pump Assembly Procedure -6110 & 7110 Pumps
Refer to Figure 3 (6110) & Figure 4 (7110).
1. Clean all parts thoroughly.
2. Install rotor in housing.
3. Position gaskets over mounting register of cover.
(6110 Pumps only) Set End Clearance. Gaskets are used to set and maintain proper internal
clearances. These clearances depend on the size of the pump and are shown below. Note:
Some Tuthill pumps are provided with non-standard clearances for use with high-viscosity or
high-temperature fluids. Consult the factory for clearances of these pumps.
Model Minimum End Clearance
6113 0.001" to 0.002” [0.03mm to 0.05mm]
6114 0.001" to 0.002” [0.03mm to 0.05mm]
6115 0.002" to 0.004” [0.05mm to 0.10mm]
Table 2 -End Clearance Values for 6110 Pumps
Thickness Color
0.010” [0.25mm] White
0.013” [0.33mm] White
0.015” [0.38mm] White
Table 3 -Available Gaskets for 6110 Pumps

Service Manual # 67
Page 19 of 36
4. Apply idler to cover and position in housing register. Align matching marks for proper location.
5. Install cover screws.
6. Once cover is installed, rotate the shaft to ensure smooth operation before proceeding.
7. Place pump on flat surface with the shaft facing upward. Check the condition of the o-ring in
the groove on the bracket. Install new o-ring if required.
8. Place key into shaft keyway.
9. Lower inner magnet onto shaft until it bottoms onto shaft shoulder. Place retaining ring into
upper retaining ring groove on shaft.
10. Place canister over inner magnet until the face of the canister flange bottoms onto the bracket.
To insure easy assembly of canister over o-ring, place a small amount of lubricating oil on
canister I.D. before assembly.
11. Position adapter securely on flat surface with the pump register end facing upward. Carefully
lower the pump/inner magnet sub-assembly into the adapter register.
12. Once the pump/inner magnet sub-assembly is in place, fasten it to the adapter with screws.
13. Place the adapter plate on the motor register.
14. Place the motor on a flat surface with the shaft facing upward.
15. Place the key into motor shaft keyway.
16. Carefully lower outer magnet onto shaft until inside face of outer magnet is flush with the shaft.
(see Figure 2).
Figure 2 -Outer Magnet Position
17. Lock outer magnet onto shaft with set screws, installing the cone-pointed set screw first.
18. Install screws to fasten pump/adapter sub-assembly to motor.

Service Manual # 67
Page 20 of 36
Section 17: Pump Assembly Procedure -6200 Pumps
Refer to Figure 5
1. Clean all parts thoroughly.
2. Install rotor in bracket.
3. Assemble housing & gasket over rotor head positioned on bracket register.
4. Set End Clearance. Gaskets are used to set and maintain proper internal clearances. These
clearances depend on the size of the pump and are shown below. Note: Some Tuthill pumps
are provided with non-standard clearances for use with high-viscosity or high-temperature fluids.
Consult the factory for clearances of these pumps.
Model Minimum End Clearance
6202 0.001" to 0.002” [0.03mm to 0.05mm]
6203 0.002" to 0.003” [0.05mm to 0.08mm]
6204 0.002" to 0.003” [0.05mm to 0.08mm]
6205 0.003" to 0.005” [0.08mm to 0.13mm]
6206 0.003" to 0.005” [0.08mm to 0.13mm]
Table 4 -End Clearance Values for 6200 Pumps
Thickness Color
0.003” [0.08mm] White
0.004” [0.10mm] White
0.005” [0.13mm] White
Table 5 -Available Gaskets for 6200 Pumps
5. Apply idler to cover and position in housing register. Align matching marks for proper location.
6. Install cover screws.
7. Once cover is installed, rotate the shaft to ensure smooth operation before proceeding.
8. Place pump on flat surface with the shaft facing upward. Check condition of o-ring in the groove
on the bracket. Install new o-ring if required.
9. If equipped, place retaining ring into lower retaining ring groove on shaft.
10. Place key into shaft keyway.
11. Lower inner magnet onto shaft until it bottoms onto retaining ring or shaft shoulder. Place
retaining ring into retaining ring groove on shaft
12. Place canister over inner magnet until the face of the canister flange bottoms onto the bracket.
To insure easy assembly of canister over o-ring, place a small amount of lubricating oil on
canister I.D. before assembly.
13. Position adapter securely on flat surface with the pump register end facing upward. Carefully
lower the pump/inner magnet sub-assembly into the adapter register.