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10 

 

H.  PUMP MAINTENANCE 
 

 

WARNING

 

 

Failure to observe precautions while installing, inspecting and maintaining pump 
can cause injury to personnel from accidental handling of liquids that may harm 
skin or clothing, or fire hazard risks from flammable liquids, or injury from high 
pressure fluid jets. 

 

 

DANGER

 

 

BEFORE 

working on equipment, make sure all power to equipment is 

disconnected and locked-out. 

 

H.1  

GENERAL COMMENTS 

 

NOTE: 

Part number identifiers (IDP) contained within parenthesis such as (9) refer to circled 
numbers shown on assembly drawings (figures 2 through 4). 

 
De-energize driver before starting with any maintenance action. 

 

H.2  

TOOLS REQUIRED 

 

Procedures described in this manual require common mechanics hand tools, a torque wrench, 
dial indicators for alignment and a suitable lifting device, such as slings, straps, etc. 

 

H3.  DISASSEMBLY AND ASSEMBLY PROCEDURES (MECHANICAL SEAL PUMPS) 

 

 

CAUTION

 

 

Fluid leakage from disassembly of pump may make the floor slippery and can 
cause personal injury 

 

Disassembly Procedures For (Figures 18 through 21) 

 

NOTE:

 

Refer to pump assembly drawings, figures 18 through 22; inlet head arrangements, Figure 26, 
special inboard cover construction, Figure 25, and mechanical seal drawings and assembly 
drawings, Figures 2 through 17, during pump disassembly. Refer to Table 1 for proper mechanical 
seal identification. Disassembly procedures for all G3D pumps with mechanical seals are identical 
except when specifically noted. 

Summary of Contents for *G3D-187

Page 1: ...Imo General Installation Operation Maintenance and Troubleshooting Manual No SRM00046 along with this manual as well as all other component manuals supplied with these type units should be read thoro...

Page 2: ...s can be done by removing seal vent set screw and pouring liquid into vent passageway before opening pump inlet Alternately seal chamber can be vented in situations where inlet pressure is above atmos...

Page 3: ...ch shall be considered for reasons of safe operation of pump and or protection of pump itself are marked by the sign ATTENTION ATTENTION If operation of pump is critical to your business we strongly r...

Page 4: ...ered by this manual In applications where equipment furnished by Imo Pump is to become part of processing machinery these instructions should be thoroughly reviewed to ensure proper fit of said equipm...

Page 5: ...BRST 6 or 7 G3DRS Special AG3DBTCS 6 or 7 EG3DNST 4 or 5 GG3DYSJ 10 G3DBS 6 or 7 G3DSCS Sealol AG3DBX 6 or 7 FG3DHXS 4 or 5 GG3DYSX 10 G3DBST 6 or 7 G3DSRJ 4 or 5 A3DESX 4 or 5 GG3DBS 6 or 7 GG3DYT 10...

Page 6: ...de IDP number s and names for replacement part s 5 Give above information to your Imo service representative Basic Pump Modifiers A Design Modification C Cyclic Service D Dampening Groove E 300 ANSI I...

Page 7: ...CRUDE OILS TYPE B H TYPE B H TYPE F TYPE B H TYPE F 187 218 250 312 4400 3600 3600 2500 4400 3600 3600 2500 3000 2500 2150 1800 All Sizes 1800 All Sizes Consult factory for allowable speeds for alter...

Page 8: ...ng 2 036 X Gasket 014 XX Spacer 039 Check Valve 015 X Ball Bearing 042 Tubing 016 Key 043 Spring Pin 017 Retainer 043 Spacer 018 Bolt 4 044 X O ring 019 XX Idler 2 045 X Dyna Seal 020 XX Idler cups 2...

Page 9: ...crew 2 031 Tubing 011 Bolt 8 032 Tee 012 XX Power Rotor 033 Nameplate 014 X Balance Piston Housing 034 Drive Screw 3 015 Spacer 035 Plug 016 X Packing 036 Elbow 017 Packing Gland 037 Spring Pin 2 018...

Page 10: ...tion H 2 TOOLS REQUIRED Procedures described in this manual require common mechanics hand tools a torque wrench dial indicators for alignment and a suitable lifting device such as slings straps etc H3...

Page 11: ...lts 018 and bearing retainer 017 8 Pull assembled power rotor 011 from case 001 NOTE Removal of assembled power rotor 011 includes removal of truarc rings 013 ball bearings 015 and spacer 014 If insta...

Page 12: ...urbed from their previously installed position Refer to pump assembly drawings Figures 18 through 22 inlet head arrangements Figure 26 special inboard construction Figure 25 mechanical seal drawings a...

Page 13: ...014 and inner truarc ring 013 e Install ball bearing 015 by pressing on inner race only of ball bearing 015 NOTE Inner race of ball bearing 015 should be positioned next to truarc ring 013 f Install...

Page 14: ...oid damage to power rotor B Figures 4 5 8 9 10 and Sealol Loosen setscrews and slide rotating assembly off power rotor shaft ASSEMBLY Rotating Assembly The rotating assembly 3 is normally packaged as...

Page 15: ...Type 2 Single Mechanical Seal Clamped or J Seat Type Figure 3 Type 2 Single Spring Mechanical Seal O Ring Seat Type Figure 4 Type 8 1 Multi Spring Mechanical Seal Clamped or J Seat Type Figure 5 Type...

Page 16: ...Mechanical Seal Clamped or J Seat Type Figure 7 Type 21 Single Spring Mechanical Seal O Ring Seat Type Figure 8 Type 8B3 Multi Spring Mechanical Seal O Ring Seat Figure 9 Type 8B3 Multi Spring Mechan...

Page 17: ...17 Figures 11 through 17 Mechanical Seal Information Figure 11 Type 2 Clamped Seat Rotor Size187 Type 8 1 and 21 Clamped Seat 187 218 and 312 Flexbox Rotor Size Figure 10 Type BX Mechanical Seal...

Page 18: ...18 Figure 12 Type 2 8 1 O ring Seat Rotor Size 250...

Page 19: ...19 Figure 13 Type 2 O ring Seat Rotor Size 187 and 218 Type 8 1 and 21 O ring Seat rotor Size 187 and 218 Sealot Rotor Size 187 Type 8B3 Rotor Size 187 218 312...

Page 20: ...20 Figure 14 Type 2 81 and O ring Seat Rotor Size 250...

Page 21: ...21 Figure15 Type BX Rotor Size 187 through 250...

Page 22: ...22 Figure16 Type 9B3 Rotor Size 187...

Page 23: ...23 Figure 17 No Seal Rotor Sizes 187 through 312...

Page 24: ...arp pointed brass or copper rod remove packing 016 10 Remove capscrews 010 and remove inboard cover 009 with O ring 007 from power rotor 012 11 Remove balance piston housing 014 with tube 004 and spac...

Page 25: ...screws 011 to proper value listed in table 4 7 Install idlers 020 into housing 002 idler bores by turning idlers 020 while inserting them into housing 002 8 Install idler cups 021 on idlers 020 where...

Page 26: ...nted as new for a period of one year from date of shipment For either field service or factory overhaul assistance contact your local Imo Sales Office or representative at Technical Customer Service D...

Page 27: ...27 Note Idler Cups 20 not required on some designs...

Page 28: ...28 Note Idler Cups 20 not required on some designs...

Page 29: ...29 Note Idler Cups 20 not required on some designs...

Page 30: ...30 Note Idler Cups 20 not required on some designs...

Page 31: ...31 Note Idler Cups 20 not required on some designs...

Page 32: ...32 Note Idler Cups 20 not required on some designs...

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Page 36: ...OR International all rights reserved CIRCOR Pumps North America LLC 1710 Airport Road PO Box 5020 Monroe NC USA 28111 5020 Tel 1 704 289 6511 Toll 1 877 853 7867 Email cc colfaxfluidhandling com Web c...

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