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Tuthill 120A, Installation And Service Instructions Manual, Page: 21 / 38

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Tuthill 120A Installation And Service Instructions Manual Download Page 21

Page 21 of 38

Chamber Clearances

Faceplate gaskets compress to approximately .003 - .004 inches when pump bolts are tightened.  For impeller assembly settings and 

resultant clearances, see below.

MODEL MATERIAL 

CLEARANCES

A IMPELLER SETTING 

(SIDE)

B RESULTING SIDE 

CLEARANCE 

(OPPOSITE SIDE)

C ON RADII

D RESULTING PASS 

OVER

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

Models: 70A & 120A

Non-Gall

Standard

.0020

.0025

.0025

.0080

.0040

.0060

.0005

.0045

Hot

.0060

.0065

.0065

.0120

.0080

.0100

.0035

.0075

Gall

Standard

.0065

.0070

.0070

.0125

.0080

.0100

.0035

.0075

Hot

.0105

.0115

.0105

.0165

.0120

.0140

.0060

.0110

Model: 330

Non-Gall

Standard

.0040

.0045

.0045

.0100

.0060

.0080

.0015

.0065

Hot

.0090

.0100

.0090

.0150

.0110

.0130

.0050

.0110

Gall

Standard

.0105

.0115

.0105

.0165

.0120

.0140

.0060

.0120

Hot

.0155

.0165

.0155

.0215

.0170

.0190

.0100

.0160

Single Lobe Impeller

FacePlate

Mating Impeller

Housing

C

C

B

B

C

C

A

A

D

D

8. 

If the impellers are properly set on the shaft to dimensions from step 1, then the initial setting clearance will always be too large.  

Thus, to move the impeller to the proper setting, add shims between bottom of bearing bore and the bearing outer race. The 

following shims are available:

•  Red .002”
•  Blue .005”
•  Pink .015”

9. 

Grease faceplate bearings thru fittings on bearing caps.

10. 

For the remaining reassembly procedure, refer to steps 1 - 16 in Minor Reassembly Instructions.

Summary of Contents for 120A

Page 1: ...Installation and Service Instructions Excellenceatwork Excellenceinlife HD Series Pumps ...

Page 2: ... 70A 120A and 330 Pumps 15 Disassembly Reassembly for 70A 120A 330 Pumps 16 Fluid Chamber Check Points 16 Major Disassembly Instructions 19 Reassembly 19 Chamber Clearances 21 600 Pumps Isometric Drawing with Packing Models Starting w O5 22 General Parts List for Model 600 Pumps 23 600 Pumps Isometric Drawing Models Starting w O5 Tuffseals 24 General Parts List for Model 600 Pumps 25 600 Pumps Mod...

Page 3: ...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 then the pump must be fully flushed prior to use If the pump is to be operated ...

Page 4: ...450 27 5 280 127 3 Top 2 Front 120A 450 135 511 450 27 5 300 136 4 Top 3 Front 330 450 337 1276 450 27 5 550 249 5 Top 4 Front 600 450 666 2523 450 27 5 900 408 6 Right 6 Left Stainless Steel 30A 450 24 7 93 150 10 3 100 45 Same As Above 2A 450 67 5 256 150 10 3 250 113 Same As Above 3A 450 135 511 150 10 3 270 122 Same As Above 70A 450 67 5 256 450 27 5 280 127 Same As Above 120A 450 135 511 450 ...

Page 5: ...le Iron O1 O2 O5 Models DIGIT 7 0 Internal NPT Std on ID models 1 External NPT Standard on SD models DIGIT 8 0 No Relief Valve 1 Relief Valve Available on all SD models ID models 30 2A 3A 70A 120A DIGITS 9 10 01 Hot Clearance 02 Special Shaft Material 05 Special Packing 06 Special Packing Configuration 08 Mechanical Seals 09 Special Bushings 10 Special Clearances 13 Steam Jacket Tracing 19 Special...

Page 6: ...hings Used in Ductile Iron Pumps Standard Packing 500 F PTFE Glass Filled Gaskets 450 F 400 F Bronze Bushings for Ductile Iron Pumps 350 F Standard Carbon Bushings in S S Pumps Standard Gasket Material Standard Oil Seals for Faceplate and Gear Case Standard Oil Seals for Faceplate and Gear Case Standard Gear Case Oil 300 F 250 F 200 F 150 F Standard Pump Materials 100 F 50 F 0 F 40 F Note Viton an...

Page 7: ...e of the pump will restrict any solids or abrasives from entering the pump which could cause internal damage Under no conditions should the pump be used to support external piping loads weight or expansion Piping and other equipment should be independently supported Piping strain can result in misalignment hot bearings worn couplings vibration etc It is important that the piping used be clean and ...

Page 8: ...ffing box or using another packing type Lubrication Requirements Faceplate Bearings The faceplate bearings are greased Grease should be added to faceplate bearings when oil is changed Add grease through fitting until new grease can be seen exiting under lip seal where shaft enters bearing Bearings are designed to provide a minimum L10 life of 15 000 hours at maximum speed and pressures conditions ...

Page 9: ...ce for periodic inspection of components and or a major repair the following steps should be taken See following pages for exploded pump views and instructions 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...

Page 10: ...36 38 39 40 41 42 37 25 26 27 28 29 30 31 32 33 34 35 12 13 14 15 16 17 18 19 20 21 22 23 24 4 1 2 3 5 6 9 7 11 10 8 43 44 70A 120A and 330 Pumps Isometric Drawing Models Starting w O5 Packing ...

Page 11: ...g 4 26 Gore Tex Gasket 1 27 Impeller Housing CI 1 Impeller Housing SS 28 Housing Bushings 2 CI DU Bushing SS Carbon Bushing 29 Packing 4 sets 30 Packing Gland CI 4 Split Glands for SS 8 31 Stud 8 32 Nut CI 8 Nut SS 33 Lip Seal 3 34 Spacer 2 35 Roller Bearing 2 36 Cap Screw 2 37 Bearing Housing 1 38 Pipe Plug CI 2 Pipe Plug SS 39 Gear Case Gasket 1 40 Gear Case Cover 1 41 Cap Screw 6 42 Vented Pipe...

Page 12: ...4 1 2 3 5 6 9 7 11 10 8 43 44 36 38 39 40 41 42 37 25 26 27 28 29 45 31 32 33 34 35 12 13 14 15 16 17 18 19 20 21 22 23 24 70A 120A and 330 Pumps Isometric Drawing Models Starting w O5 Tuffseals ...

Page 13: ...e Plug SS 25 V Ring 4 26 Gore Tex Gasket 1 27 Impeller Housing CI 1 Impeller Housing SS 28 Housing Bushings 2 CI DU Bushing SS Carbon Bushing 29 Tuffseal 4 31 Stud 8 32 Nut CI 8 Nut SS 33 Lip Seal 3 34 Spacer 2 35 Roller Bearing 2 36 Cap Screw 2 37 Bearing Housing 1 38 Pipe Plug CI 2 Pipe Plug SS 39 Gear Case Gasket 1 40 Gear Case Cover 1 41 Cap Screw 6 42 Vented Pipe Plug 1 43 Nametag 1 44 Drive ...

Page 14: ...36 38 39 40 41 42 37 25 26 27 28 29 30 31 32 33 34 35 12 13 14 15 16 17 18 19 20 21 22 23 24 4 1 2 3 5 6 9 7 11 10 8 43 44 45 70A 120A and 330 Pumps Isometric Drawings Models Starting w O5 Mech Seals ...

Page 15: ...ex Gasket 1 27 Impeller Housing CI 1 Impeller Housing SS 28 Housing Bushings 2 CI DU Bushing SS Carbon Bushing 29 Mechanical Seal 4 30 Mech Seal Gland CI 4 Mech Seal Gland SS 4 31 Stud 8 32 Nut CI 8 Nut SS 33 Lip Seal 3 34 Spacer 2 35 Roller Bearing 2 36 Cap Screw 2 37 Bearing Housing 1 38 Pipe Plug CI 2 Pipe Plug SS 39 Gear Case Gasket 1 40 Gear Case Cover 1 41 Cap Screw 6 42 Vented Pipe Plug 1 4...

Page 16: ...of the way Then remove packing 29 from both seal chambers in the impeller housing If pump is equipped with mechanical seals see below for general instructions and refer to the seal instructions that were shipped with the pump Also reference Page 39 for additional packing information If Tuffseals are used reference assembly on page 15 Loosen Tuffseal set screws that lock the cartridge seal s collar...

Page 17: ...X Y Procedure No 2 Install new gears Place faceplate group in vise and install keys as in Procedure No 1 Slide gear on driven shaft aligning keyway of gear with woodruff key on shaft Position impellers as shown in the sketch in Procedure No 1 with dimension X the same as dimension Y Slide timing gear on drive shaft and align keyway in gear with woodruff key in shaft and mesh gears Recheck dimensio...

Page 18: ...ference from incorrect timing 9 Apply grease to gasket seal surface on gear case Press gasket in place The same gasket is used on both impeller housing and gear case 10 Slide gear case cover over shafts being certain that drive shaft bore in cover is properly positioned in relation to drive shaft CAUTION Take care in sliding lip of oil seal over drive shaft If proper care is not taken the lip will...

Page 19: ... Remove six bearing hex head bolts 12 11 Remove the two bearing covers 14 12 Remove the two faceplate bearing locknuts 15 13 Slide impeller and shaft assembly out through the fluid chamber side of faceplate 14 Remove the two ball bearings 17 from the bearing bridge on faceplate 15 Check condition of lip seals 18 and replace if required 16 Remove the two setscrews 11 from each impeller hub 17 Press...

Page 20: ...t working height of the seal Also reference Page 41 for additional mechanical seal information 5 Insert impeller and shaft assemblies threaded portion first through stuffing box packing mechanical seal body and seat Tuffseals seal gland and inner race of faceplate bearing Secure assemblies in this position by tightening the faceplate bearing lock nuts 15 V rings 25 should also be installed while i...

Page 21: ...0 0110 Model 330 Non Gall Standard 0040 0045 0045 0100 0060 0080 0015 0065 Hot 0090 0100 0090 0150 0110 0130 0050 0110 Gall Standard 0105 0115 0105 0165 0120 0140 0060 0120 Hot 0155 0165 0155 0215 0170 0190 0100 0160 Single Lobe Impeller FacePlate Mating Impeller Housing C C B B C C A A D D 8 If the impellers are properly set on the shaft to dimensions from step 1 then the initial setting clearanc...

Page 22: ...19 20 21 22 23 36 38 39 40 41 42 43 27 28 29 10 32 33 30 31 34 1 2 3 4 5 6 24 25 26 7 8 9 25 35 37 10 14 12 10 11 13 15 16 17 18 34 600 Pumps Isometric Drawing with Packing Models Starting w O5 ...

Page 23: ...er 2 27 Ball Bearing 2 28 Set Screw 6 29 Bearing Carrier 2 30 Nut CI 8 Nut SS 31 Stud 8 32 Shim 002 As Req Shim 005 As Req Shim 015 As Req 33 Faceplate CI 1 Faceplate SS 34 Pipe Plug CI 8 Pipe Plug SS 35 Gore Tex Gasket 1 36 Packing 4 sets 37 Cap Screw 16 38 Dowel Pin 2 39 Housing Bushings 2 DU Bushing CI Carbon Bushing SS 40 Impeller Housing CI 1 Impeller Housing SS 41 Cap Screw 4 42 Packing Glan...

Page 24: ...19 20 21 22 23 36 38 39 40 41 42 27 28 29 10 32 33 30 31 34 1 2 3 4 5 6 24 25 26 7 8 9 10 14 12 10 11 13 16 17 18 25 35 37 15 34 600 Pumps Isometric Drawing Models Starting w O5 Tuffseals ...

Page 25: ...ption Qty 26 Bearing Cover 2 27 Ball Bearing 2 28 Set Screw 6 29 Bearing Carrier 2 30 Nut CI 8 Nut SS 31 Stud 8 32 Shim 002 As Req Shim 005 As Req Shim 015 As Req 33 Faceplate CI 1 Faceplate SS 34 Pipe Plug CI 8 Pipe Plug SS 35 Gore Tex Gasket 1 36 Tuffseal 4 37 Cap Screw 16 38 Dowel Pin 2 39 Housing Bushings 2 DU Bushing CI Carbon Bushing SS 40 Impeller Housing CI 1 Impeller Housing SS 41 Cap Scr...

Page 26: ...1 2 3 4 5 6 24 25 26 7 8 9 10 14 12 10 11 14 13 16 17 18 16 19 20 21 22 23 36 38 39 40 41 42 43 27 28 29 10 32 33 30 31 32 34 25 35 37 15 34 44 33 600 Pumps Models Starting w O5 Mech Seals ...

Page 27: ... 2 27 Ball Bearing 2 28 Set Screw 6 29 Bearing Carrier 2 30 Nut CI 8 SS 31 Stud 8 32 Shim 002 As Req 005 As Req 015 As Req 33 Faceplate CI 1 SS 34 Pipe Plug CI 8 SS 35 Gore Tex Gasket 1 36 Mechanical Seals 4 37 Cap Screw 16 38 Dowel Pin 2 39 Housing Bushings 2 CI DU Bushing SS Carbon Bushing 40 Impeller Housing CI 1 SS 41 Cap Screw 4 42 Mech Seal Gland CI 4 SS 4 43 V Ring 4 44 Seal Gland Gasket 4 ...

Page 28: ...the setscrews There are two in each gear Then slide gears off drive end of shaft If gear keys are sheared a gear puller may be required Remove two woodruff gear keys 8 5 If interference fitted IF timing gears 14 are furnished Mark gears so that in reassembly the gears may be remounted on the shafts from which they were removed IF gears do not have setscrews First attempt to remove them can be can ...

Page 29: ...punch mark on the mating tooth on the driven shaft 4 Turn impellers to the position shown below If the dimension X is the same as dimension Y then there is no shaft damage If there is a variation then the shaft is twisted or the impeller keys may be sheared Disassemble in accordance with major disassembly instructions If the impeller keys are sheared install new keys and recheck for twisted shaft ...

Page 30: ...are face out and aligned These marks are two center punch marks on the gear on the drive shaft and one center punch mark on the mating tooth cavity Then turn pump drive shaft over several times to be certain that there is no interference from being out of time Tighten setscrews on shaft Then install locking setscrew 6 Interference fitted timing gears Make sure that gears are properly marked with t...

Page 31: ...oosen the mechanical seal set screws Loosen the mechanical seal gland nuts 30 and allow the mechanical seal gland to be loose on the housing Thus when the shafts are pulled out of this area the gland will not fall off Allow it to hang loosely on the studs Also reference Page 41 for additional mechanical seal information 10 Remove six hex head bolts 25 Remove bearing covers 26 Press tines of lock w...

Page 32: ...t Tuffseals seal gland and inner race of faceplate bearing V rings should also be installed while inserting the shafts Beware the V rings 43 need to be slid onto the shafts because their snug fit Secure assemblies in this position by tightening faceplate bearing lock nuts 1 6 Insert bearing covers 26 in place and tighten bearing hex head bolts 25 The impeller and shaft assemblies are now secure in...

Page 33: ...dual ring should be firmly seated with a tamping tool Never depend entirely on the gland to seat a set of packings This practice will jam the last rings installed but leave the front rings loose The result is excessive and rapid wear 5 After last ring is installed tighten gland nuts finger tight Then start pump and take up nuts until leakage is decreased Stopping leakage at this point will cause p...

Page 34: ... Tighten the seal gland nuts to secure the Tuffseal to the stuffing box 6 After the pump s end clearance is set then tighten the collar setscrews evenly to the shaft 7 Rotate the spacers away from the collar so that they will not rub against any rotating component when the seal is operating Installing Mechanical Seals in Pumps General 1 Once pump is fully disassembled shafts are removed from the i...

Page 35: ... 57 Note 2 4 70 75 70A 120A Hex Head 1 LG P104 4H Note 1 13 70 75 Hex Head 1 LG P104 2H Note 1 1 70 75 Socket Head 1 LG P105 78 Note 2 4 11 14 Note SAE grade 5 steel Min tensile strength of 105 000 PSI heat treated medium carbon High carbon alloy quenched and tempered Min tensile strength of 160 000 PSI Grade 316 stainless steel Serial Number Location The serial number will be located on the pump ...

Page 36: ...X X X X Misalignment between pump and driver Re align Check coupling alignment with dial indicator X X X X Rotating elements binding Disassemble and inspect X X X X Pipe strain on pump casing Disassemble pipe and re align before reassembling X X Relief valve chattering Check setting and valve seating X X X X Excessive system pressure Check for obstructions in discharge line X X X Stuffing box pack...

Page 37: ...is improperly installed permitting an air pocket to form in the pump Increased clearances or wear in the pump will sometimes cause the pump to deliver an insufficient supply of liquid Pump works spasmodically Leaky suction lines Suction conditions vary Air or vapor is in the liquid Problem Excessive power draw Pressure is too high Liquid is more viscous than originally expected Suction or discharg...

Page 38: ...thill Pump Group warrants its products against defective material and workmanship for 90 days from the date of startup or one year from date of shipment from Tuthill s plant whichever comes first This warranty does not include products damaged by tampering improper installation abuse or wear Nor does it cover consequential damages or other losses due to pump failure Because of the unpredictable na...

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