IMO G3D-250, G3D-187, G3D-218, G3D-312 Instruction Manual

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INSTRUCTION MANUAL

Manual No. SRM00061

REV 08 (13-0376)

October, 2013

AND

RTS LIST

FOR

_G3D-187, 218, 250 and 312 S ERIES PUMPS

(Idler Cup and Hydrostatic Thrust Designs)

WARNING

The 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 thoroughly prior to pump installation, start-up, operation, maintenance or troubleshooting.

IMPORTANT NOTE

Failure to fill or vent seal chamber as described above may cause damage to seal running

The importance of seal chamber priming cannot be overemphasized. Due to the prevalence of seal damage and leakage caused by not filling the seal chamber with liquid before putting a pump in service, this page is located at the beginning of this document.

SEAL CHAMBER PRIMING

Fill mechanical seal chamber with liquid to insure seal does not start dry. This 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 atmospheric by opening inlet and discharge valves and then loosening seal vent plug to allow positive inlet pressure to push air out of seal chamber until oil flows from it. See figure below.

Filling or Venting Seal Cavity Using Seal Vent

CAUTION

faces which may result in seal leakage.

READ THIS ENTIRE PAGE BEFORE PROCEEDING

idental contact with equipment or liquids. Protection should be provided by

Non compliance of safety

Safety instructions

Safety instructions which

by the sign:

ATTENTION

If operation of pump is critical to your business, we str ongly recommend you keep

pump refurbishment after internal inspection can be accomplished.

FOR SAFETY OF PERSONNEL AND TO PREVENT DAMAGE TO EQUIPMENT, THE FOLLOWING NOMENCLATURE HAS BEEN USED IN THIS MANUAL:

DANGER

Failure to observe precautions noted in t his box can result in severe bodily injury or loss of life.

WARNING

Failure to observe precautions noted in this box can cause injury to personnel by acc user to prevent accidental contact.

CAUTION

ATTENTION

Failure to observe precautions noted in this box can cause damage or failure of equipment.

instructions identified by the following symbol could affect safety for persons:

where electrical safety is involved are identified by:

shall be considered for reasons of safe operation of pump and/or protection of pump itself are marked

ATTENTION

a spare pump or major repair kit in stock at all times. As a minimum, a minor repair kit (o-rings, gaskets, shaft seal and bearings) should be kept in stock so

Table of Contents Seal Chamber Priming………………………………………………………………………………….2

Safety and Table of Contents ..................................................................................................... 3

A. General Instructions, introduction, Description of Equipment ................................................ 4

B. Assembly Drawing List and Mechanical Seal Types…………………………………………….5

C. Pump Model Identification, Ordering Instructions .................................................................. 6

D. Operating Limits ................................................................................................................... 7

E. Parts Lists ......................................................................................................................... 8-9

G. Pump Disassembly and Reassembly (Pumps with seals) ................................................... 10

H. Mechanical Seal Information ......................................................................................... 17-23

I. Pump Disassembly and Reassembly (Packing Pumps) ................................................. 24-26

J. Troubleshooting, Field and Factory Service and Parts ........................................................ 26

K. Assembly Drawings ....................................................................................................... 27-35

L. Imo Address and Phone Numbers ...................................................................................... 36

If installation, operation, and maintenance instructions are not correctly and strictly

damage resulting from failure to comply with instructions.

A. GENERAL INSTRUCTIONS

The instructions found herein cover the disassembly, assembly and parts identification of _G3D-187, 218, 250 and 312 series pumps. Both the original design with idler cups and the newer design with hydrostatic idlers are covered.

NOTE: I ndividual contracts may have specific provisions that vary from this manual. Should any

questions arise which may not be answered by these instructions, refer to General Installation Operation, Maintenance, and Troubleshooting Manual, (No. SRM00046), provided with your order. For further detailed information and technical assistance please refer to Imo Pump, Technical/Customer Service Department, at (704) 289-6511.

This manual cannot possibly cover every situation connected with the installation, operation, inspection, and maintenance of equipment supplied. Every effort was made to prepare text of manual so that engineering and design data is transformed into the most easily understood wording. Imo Pump must assume personnel assigned to operate and maintain supplied equipment and apply this instruction manual have sufficient technical knowledge and are experienced to apply sound safety and operational practices which may not be otherwise covered 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 equipment into overall plant operational procedures.

WARNING

followed and observed, injury to personnel or serious damage to pump could result. Imo Pump cannot accept responsibility for unsatisfactory performance or

B. INTRODUCTION

This instruction manual covers series _G3D-187, 218, 250 and 312 Imo pumps. This series of pumps has been designed for use in hydraulic, lubricating, seal, distillate, residual, fuel and crude oil applications. The model and design construction of each pump can be identified by the designator code on the pump nameplate. Definitions of model designators are identified in figure 1.

C. DESCRIPTION OF EQUIPMENT

_G3D-187, 218, 250 and Series pumps are positive displacement, rotary screw pumps consisting of a precision bored housing which encloses a driven screw (power rotor) and two intermeshing following screws (idler rotors). These screws when rotating form a succession of closures or cavities. As they rotate, fluid is moved axially from inlet port to outlet port in a continuous, uniform flow with minimum fluid pulsation and pump noise.

Table 1

G3DB

6 or 7

G3DJS

G3DYST

BG3DHST

4 or 5

GG3DX

G3DBC

6 or 7

G3DJST

AG3DB

6 or 7

BG3DHT

4 or 5

GG3DXBJ

G3DBCST

6 or 7

G3DKCX

No Seal

AG3DBC

6 or 7

CG3DB

6 or 7

GG3DY

G3DBCSX

6 or 7

G3DKHS

No Seal

AG3DBCS

6 or 7

DG3DB

6 or 7

GG3DYFC

G3DBH

6 or 7

G3DLCS

2 or 3

AG3DBCX

6 or 7

DG3DH

4 or 5

GG3DYJ

G3DBR

6 or 7

G3DNST

AG3DBS

6 or 7

EG3DBS

6 or 7

GG3DYJV

G3DBRS

6 or 7

G3DQCS

Flexibox

AG3DBST

6 or 7

EG3DBSP

6 or 7

GG3DYS

G3DBRST

6 or 7

G3DRS

(Special)

AG3DBTCS

6 or 7

EG3DNST

4 or 5

GG3DYSJ

G3DBS

6 or 7

G3DSCS

Sealol

AG3DBX

6 or 7

FG3DHXS

4 or 5

GG3DYSX

G3DBST

6 or 7

G3DSRJ

4 or 5

A3DESX

4 or 5

GG3DBS

6 or 7

GG3DYT

G3DBSU

6 or 7

G3DSS

AG3DH

4 or 5

GG3DBSX

6 or 7

GG3DYX

G3DC

4 or 5

G3DU

AG3DHC

4 or 5

GG3DHS

4 or 5

HG3DB

6 or 7

G3DCC

4 or 5

G3DV

6 or 7

AG3DHS

4 or 5

GG3DNJ

HG3DBS

6 or 7

G3DCCS

4 or 5

G3DVCS

6 or 7

AG3DHST

4 or 5

GG3DNT

KG3DH

4 or 5

G3DEST

4 or 5

G3DVCST

6 or 7

AG3DJST

GG3DNSJ

LAG3DHS

4 or 5

G3DET

4 or 5

G3DW

Packing

AG3DKHP

No Seal

GG3DNST

LAG3DKH

No Seal

G3DF

Packing

G3DXS

4 or 5

AG3DKHS

No Seal

GG3DNSTX

LAG3DNRST

G3DG

G3DY

AG3DKHX

No Seal

GG3DRS

LBG3DBRST

6 or 7

G3DH

4 or 5

G3DYCSB

AG3DNST

4 or 5

GG3DSJX

LBG3DBST

6 or 7

G3DHCS

4 or 5

G3DYCSBT

AG3DRS

GG3DUCST

G3DHH

4 or 5

G3DYCST

AG3DXSJ

GG3DUSJ

G3DHST

4 or 5

G3DYRST

AG3DV

6 or 7

GG3DUST

G3DHX

4 or 5

G3DYSC

BG3DBST

6 or 7

GG3DUSTX

SERIES G3D TYPICAL PUMP ASSEMBLY DRAWINGS

MECHANICAL S EAL PACKING PUMPS ROTOR SIZE FIGURE NO.

PUMP MODEL*

FIG. NO.

SEAL

187 218 and 250 Vertical 218 312 187 218 and 250

18 19 20 21 23 24

Table 2

SERIES G3D PUMP SEAL TYPES

ROTOR SIZES 187, 218, 250 and 312

PUMP MODEL*

SEAL

FIG. NO.

PUMP MODEL*

SEAL

FIG. NO.

PUMP MODEL*

SEAL

FIG. NO.

PUMP MODEL*

FIG. NO.

SEAL

* Pump model precedes rotor size.

D. PUMP MODEL IDENTIFICATION

Basic Pump Modifiers

A - Design Modification C - Cyclic Service D - Dampening Groove E - 300# ANSI Inlet Flange G - O-ring Inlet Head H - Special Discharge Flange LA - Dalic Plated Housing

G - Design Modification

Series

1st Letter Designator (Seal Design)

B - Rubber Bellows

(Buna Fitted, Std. Bearing) F - Standard Packing G - Crane Type 9B3

(Viton Fitted, Hi-Temp. Bearing) H - Positive Drive (Viton O-Ring Fitted,

Hi-Temp. Bearing) J - Crane Type 2 (Std. Bearing) N - Borg Warner Type BX (Viton Fitted,

Hi-Temp. Bearing) Q - Flexibox (Viton Fitted, Std. Bearing) S - Sealol (Viton Fitted, Hi-Temp. Bearing) U - Borg Warner Type BX (Viton Fitted, Std. Bearing W - Crane Type 21 (Viton Fitted, Std. Bearing) W - Hi Temperature Packing Y - Borg Warner Type BX

(Neoprene Fitted, Std. Bearing)

Rotation

Blank = CW D = CCW

Rotor Size

187 through 312

4th Letter Designator

J - Silicon Carbide Seat T - Tungsten Carbide Seat X - Special Material or Construction

3rd Letter Designator

C - Neoprene O-rings J - Silicon Carbide Seat R - No Inlet Head S - Steel Casing T - Tungsten Carbide Seat U - Stellite Seal Seat X - Special Material or Construction

2nd Letter Designator

C - Circular Mounting Flange F - Foot Mount H - Special Mounting Flange J - Silicon Carbide Seat R - Straight-thru Inlet S - Steel Casing T - Tungsten Carbide Seat X - Special Material or Construction

X G 3D X X X X XXX X

This instruction manual covers Imo Series G3D-275 pumps. The model of each pump is identified on pump nameplate. Refer to figure 1 and table 1 for instructional keys when using this manual.

Figure 1. Definitions of Model Designators

1 If you cannot positively identify your pump assembly in this book, contact Imo Pump's service department

for assistance. Have pump model and serial number to assist in identification.

2 See Figure 26 for variations of pump inlets that might apply to your pump type.

3 See Figure 25 for variations of pump inboard cover/seal arrangements that might apply to your pump

type.

4 See Seal Figures 2 through 10 for seal assembly variations as applicable to your pump type.

E. ORDERING INSTRUCTIONS

When corresponding with Imo Pump regarding Series G3D-275 series pumps, refer to pump nameplate, this instruction manual, and assembly drawing as instructed below:

1. From pump nameplate, record pump model number, serial number, and manufactured date.

2. Record instruction manual number, revision, and date.

3. From instruction manual, record figure numbers that apply to replacement part(s).

4. From assembly drawing or parts list (see table 2) provide IDP number(s) and names for replacement part(s).

5. Give above information to your Imo service representative.

Imo sales and service representatives are listed herein and in General Instruction Manual, CA-1.

CAUTION

ATTENTION

Operating conditions, such as speed, fluid viscosity, temperature, inlet pressure,

verifying system operating requirements are within pump’s capabilities.

DISTILLATE OILS

LUBE AND SEAL OILS

RESIDUAL CRUDE OILS

TYPE B & H

TYPE F

TYPE B & H

TYPE F

187

312

4400

2500

4400

2500

3000

F. OPERATION

.1 LIQUID LIMITATIONS

Never operate with thin liquids such as solvents or water. Pump is designed for liquids having general characteristics of oil.

F.2 OPERATING LIMITS

discharge pressure, filtration, duty cycle, drive type, mounting, etc., are interrelated. Due to these variable conditions, specific application limits may be different from operational limitations. Equipment must not be operated without

Under no circumstances are the following structural limitations to be exceeded.

MAXIMUM SPEED: RPM

ROTOR SIZE

218 250

3600 3600

2500 2150

Consult factory for allowable speeds for alternate seal arrangements.

VISCOSITY: .............. 33 SSU Minimum - Mechanical Seal Pumps

100 SSU Minimum - Packing Pumps 3000 SSU Maximum - Type B Mechanical Seal Pumps

Consult factory for allowable operating viscosity for other seal types at specific speeds and pressures.

Do not alter design viscosity without prior approval from factory.

TEMPERATURE: ...... Type B: 0-160°F,

Type H: 0-250°F at 1800 RPM or less, 0-225°F above 1800 RPM, Type F:0-250°F

Consult factory for allowable temperatures for alternate seal arrangements.

INLET PRESSURE: .. Types B and H - 75 PSIG nominal maximum

Type F - 10 PSIG nominal maximum Consult factory for minimum required inlet pressure.

Special modifications for up to 250 PSIG.

DRIVE: ...................... Direct, belt or chain (Type F - direct only)

FILTRATION: ............ Light fluids - 60 mes h

Heavy fluids - 1/8 to 3/16-inch

1800

All Sizes

1800

All Sizes

MOUNTING: ............. Foot or f lange mounted in any attitude

G. PARTS LIST

Idler cups (2)***

Quantities are one (1) except when noted in parentheses after part description or noted

Sixteen (16).

ITEM KIT DESCRIPTION

Table 5

LIST OF MATERIALS (FIGURES 1 8 THROUGH 2 2 )

ITEM KIT PART DESCRIPTION

001 Case 002 XX Housing 003 Plug 003 Capscrew or Bolt 004 XX Tube 005 X O-ring (2) 006 X O-ring 007 X O-ring 008 X O-ring or Gasket 009 XX Inboard Cover 010

Capscrew or Bolt ** 011 XX Power Rotor 013 X Truarc Ring (2) 014 XX Spacer 015 016 017

Ball Bearing

Key

Retainer

024 Lockwasher (2) 025 X Mechanical Seal 026 Inlet Head or Clamp Ring 027 Spacer 028 Nameplate 029

Drive Screw * 030 Lockwasher 031 X Gasket 031

Capscrew (4) 032 Plug 035 XX T r uar c Ring 035 X Gasket 036 X Gasket 039 Check Valve 042 Tubing 043 Spring Pin 043 Spacer

018 Bolt ( 4) 019 XX Idler (2) 020 XX 021 XX Thrust Plate 022 Spacer (2) 023 Bolt or Stud (2)

044 X O-ring 045 X Dyna Seal 046 O-ring 046 X Stop Pin 047 XX Balance Piston Housing

(X) Minor Repair Kit items (XX) Major Repair Kit items. Items marked (X) also included in Major Repair Kit.

below.

* Quantity is three (3) for Figure 13 pumps. ** Based on Inboard Cover and Inlet Head design, quantity can be four (4), eight (8) or

*** Note: Some Idlers have a hydrostatic thrust design and do not need idler cups (21).

Idler Cups***

ITEM KIT DESCRIPTION

Table 6

LIST OF MATERIALS (FIGURES 23 AND 24)

ITEM KIT PART DESCRIPTION

001 Case 002 XX Housing 003 Plug 004 Tube 005 X O-ring (2) 006 X O-ring 007 X O-ring 008 X Gasket 009 XX Inboard Cover 010 XX Capscrew (2) 011 Bolt (8) 012 XX Power Rotor 014 X Balance Piston Housing 015 Spacer 016 X Packing 017 Packing Gland 018 Gland Scr ew (2)

022 XX Thrust Plate 023 Spacer (2) 024 Bolt (2) 025 Lockwasher (2) 026 Inlet Head 027 Key 028 Elbow (2) 029 Nipple (2) 030 XX Check Valve 031 Tubing 032 Tee 033 Nameplate 034 Drive Screw (3) 035 Plug 036 Elbow 037 Spring Pin (2)

038 Nut (2) 019 Washer (2) 020 XX Idler (2) 021 XX

039 Nipple

040 Nipple

(X) Minor Repair Kit items (XX) Major Repair Kit items. Items marked (X) also included in Major Repair Kit.

Quantities are one (1) except when noted in parentheses after part description.

*** Note: Some Idlers have a hydrostatic thrust design and do not need idler cups (21).

H. PUMP MAINTENANCE

Failure to observe precautions while installing, inspecting and maintaining pump

pressure fluid jets.

BEFORE working on equipment, make sure all power to equipment is disconnected and locked-out.

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

WARNING

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

DANGER

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

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.

Close off suction and discharge piping to pump and disconnect piping. If applicable, remove tubing (042,

CAUTION

ATTENTION

Figure 20) with check value (039). (Must be reinstalled in original installed position.) Remove drain plugs and drain unit. Remove pump from driver, coupling and mounting bracket. Remove coupling hub and key (016).

1. Remove capscrews (010) or bolts (010) with lockwashers (030), if applicable, and remove inlet head (026) from case (001).

NOTE: If no inlet head is used, (Figure 26, Arrangement C) remove clamp ring (026).

2. Remove gasket (008) from case (001) or O-ring (008) from inlet head (026).

3. Remove bolts (023) or jam nuts (047) from studs (023) and lockwashers (024).

4. Remove thrust plate (021) and spacers (022). If installed, remove 0-rings (046) from studs (023, Figure21).

5. Remove idler cups (020), where applicable.*

6. Remove idlers (019) by unscrewing idlers from housing (002) idler bores.

Do not permit idlers (019) to drop as they emerge from housing (002).

7. Remove bolts (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 installed, mechanical seal (025) and truarc ring (035) will also be removed with assembled power rotor (011).

9. On pumps equipped with mechanical seal (025), remove gasket or O-ring from mechanical seal bore of cover (009).

10. Remove capscrews (010, 003 or 031) or bolts (010 or 003) and remove inboard cover (009) from case (001).

11. (Figures 18 through 21) Remove O-ring (007) from inboard cover (009) NOTE: If installed, lockwashers (030) will be removed with bolts (010).

12. Remove tube (004) with O-rings (005) and spacer (027) from either inboard cover (009) or housing (002). NOTE: Spacer (027) not installed on rotor size 312 pumps.

13. Remove O-rings (005) from tube (004). Remove O-rings (007) from case (001).

14. Remove housing (002) with O-ring (006) from inlet end of case (001). Remove O-ring (006) from housing (002).

15. Disassembly power rotor (011) as follows

(a) Remove outer truarc ring (013). (b) Using a bearing puller or press, remove ball bearing (015). (c) Remove inner truarc ring (013). (d) Remove spacer (014).

NOTE: Based on mechanical seal design, removal of spacer (014) can remove mechanical seal

stationary assembly.

* Note: Some idlers have a hydrostatic thrust design and do not use idler cups (020).

NOTE: Power rotor (011) with balance piston is a sub-assembly. Do not remove balance piston as parts

are not sold or serviced separately.

(e) Remove mechanical seal. Refer to Mechanical Seal Disassembly procedures for removal of

stationary assembly (1 and 2) and rotating assembly (3). (f) If applicable, remove truarc ring (035) or shim (051). NOTE: Balance piston (012) furnished as part of power rotor (011) and bushing (033) furnished as part of

inboard cover (009) and are not serviced separately when used on specific pump types.

Assembly Procedures (Figures 18 through 21) NOTE: Prior to assembly of pump, all parts should be cleaned and inspected for nicks and burrs. Replace

all worn or damaged parts. Imo Pump recommends automatic replacement of gaskets, O-rings, mechanical seals and ball bearings when these parts are disturbed 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 and assembly drawings, Figures 2 through 17, and List of Material, Table 5, during pump assembly. Coat all parts with SAE-30 oil to assist in assembly. Assembly procedures for all G3D pumps with mechanical seals are identical except when specifically noted.

1. Install O-ring (006) into groove of rotor housing (002). Install O-rings (005) on tube (004) and install tube (004) in housing (002).

2. (Figures 18 through 21) Install housing (002), O-ring end first, in inlet end of case (001) until housing (002) is flush with inlet end of case (001). Align spacer (027) with tube (004) and install spacer (027) in case (001).

NOTE: Spacer (027) not installed on rotor size 312 pumps.

3. (Figures 18 through 21) Install O-ring (007) on inboard cover (009).

4. Install inboard cover (009) on case (001). NOTE: Ensure that tube (004) enters inboard cover (009) tube bore.

5. Install capscrews or bolts (003, 010 or 031) and torque bolts or capscrews (003 or 010) to proper value as given in Table 3.

NOTE: If installed, lockwashers (030) will be installed with bolts (010).

Table 3

PART

ROTOR SIZE

TORQUE VALVE

PART

ROTOR SIZE

TORQUE VALVE

(1) Part Number 010 or 031 installed in inboard cover (009) . (2) Part Number 010 installed in inlet head (026).

TORQUE VALUES - MECH ANICAL SEAL PUMPS

010 and

(1)

031

(2)

010

003

187 218 250 312

187 218 250

35 lbs. ft. (± 5 lbs. ft.)

55 lbs. ft. (± 5 lbs. ft.) 70 lbs. ft. (± 5 lbs. ft.) 78 lbs. ft. (± 5 lbs. ft.)

90 lbs. ft. (± 5 lbs. ft.) 75 lbs. ft. (± 5 lbs. ft.)

145 lbs. ft. (± 5 lbs. ft.)

78 lbs. ft. (± 5 lbs. ft.) 20 lbs. ft. (± 2 lbs. ft.)

20 lbs. ft. (± 2 lbs. ft.) 20 lbs. ft. (± 2 lbs. ft.)

018

023

047 312 30 lbs. ft. (± 2 lbs. ft.)

6. Assemble power rotor (011) as follows:

OTE: For pumps with no mechanical seal, proceed to Step 6 (d).

(a) I nstall truarc ring (035, Figures 12 and 14) or shim (051, Figure 11, rotor size 312). (b) I nstall mechanical seal (025) rotating assembly (3, Figures 2 through 10). (c) Install mechanical seal (025) stationary assembly (1 and 2, Figures 2 through 10) on power

rotor or in spacer (014) based on seal design.

(d) I nstall spacer (014) and inner truarc ring (013).

187 218 250 312

18 lbs. ft. (± 2 lbs. ft.) 20 lbs. ft. (± 2 lbs. ft.) 20 lbs. ft. (± 2 lbs. ft.) 38 lbs. ft. (± 2 lbs. ft.)

10 lbs. ft. (± 2 lbs. ft.) 15 lbs. ft. (± 2 lbs. ft.) 15 lbs. ft. (± 2 lbs. ft.) 30 lbs. ft. (± 2 lbs. ft.)

(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 truarc ring (013) next to ball bearing (015) in outer ring groove of power rotor (011).

7. O

n pumps equipped with mechanical seal, install gasket or O-ring in mechanical seal bore of cover

(009).

8. Install assembled power rotor (011), centering all parts, in case (001).

9. I

nstall retainer (017) using bolts (018). Torque bolts (018) to proper value given in Table 3.

10. I

nstall idlers (019) into housing (002) idler bores by turning idlers (019) while inserting them int

ing.

hous

11. Install cups (020) on idlers (019), where applicable.

ote: Some Idlers have a hydrostatic thrust design and do not need idler cups (20).

* N

nstall spacers (022), thrust plate (021), lockwashers 24 and bolts (023) or jam nuts (047). Torque

12. I

bolts (023) or jam nuts (047) to proper value given in Table 3.

13. . In

stall O-ring (008) on inlet head (026) or gasket (008) on case (001). Install inlet head (026) or clamp ring (026, Figure 26, Arrangement C) using capscrews or bolts (010). Torque capscrews or bolts (010) to correct value given in Table 3. NOTE: If installed, lockwashers (030) will be install with bolts (010).

*Note: Some idlers have a hydrostatic thrust design and do not use idler cups (020)

14. Install key (016) and coupling hub on power rotor (011).

15. Install drain plugs if removed during disassembly.

16. If applicable, connect tubing (042, Figure 20) ensuring that check valve (039) is installed in original position

17. Connect pump to mounting bracket and coupling. Align pump with driver as described in CA-1 manual.

MECHAN ICAL SEALS

Mechanical seals installed in Series G3D pumps are Type 2, Figures 2 and 3: Type 8-1, Figures 4 and 5: Type 21, Figures 6 and 7: Type 8B3, Figure 8: Type 9B3, Figure 9; Type BX, Figure 10; and Flexibox and Sealol, not illustrated. Disassembly and assembly procedures for mechanical seals are as follows:

DISASSEMBLY

Stationary Assembly:

A. ( Fi gur es 2, 4, 6 and Flexibox) Slide stationary assembly, seat (1) and gasket (2) off power rotor shaft. B. (Figures 3, 5, 7, 8, 9, 10 and Sealol) Stationary assembly, seat (1) and O-ring (2), is removed with

spacer (014) from power rotor shaft. Remove stationary assembly from spacer (014).

Rotating Assembly:

A. ( Fi gur es 2, 3, 6, 7 and Flexibox) Slide rotating assembly (3) of power rotor shaft. NOTE: Use a piece

of shim stock for removal of Figure 11 to avoid damage to power rotor.

B. ( Fi gur es 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 an assembly for ease of installation. Ensure that all Orings are properly positioned in assembly prior to installation. Coat all parts of the seal with oil prior to assembly on power rotor shaft. Refer to mechanical seal drawings, Figures 2 through 10, and mechanical seal assembly drawings, Figures 11 through 17, for applicable assembly procedures.

A. ( Fi gur es 2, 3, 6, 7 and Flexibox) Slide rotating assembly (3) on power rotor shaft next to piston (012,

Figures 11 and 13), truarc ring or spacer (035, Figures 12 and 14).

NOTE: Use a piece of shim stock under split sleeve of Flexibox seal to avoid damage to power rotor. B. Remove and discard retaining clips (4) prior to final tightening of setscrews (3F). C. (Figures 2 through 10) Install mechanical seal seat (1) and O-ring (2) in spacer (014, Figures 13, 15

and 16). Ensure that spring pin is properly positioned to engage slot in seal seat. Slide spacer (014) on

power rotor. Install inner truarc ring (013) in power rotor groove. Press ball bearing (015) on power

rotor, pressing only on inner race of ball bearing (015). Install outer truarc ring (013) in power rotor

groove.

Figures 2 through 10 Mechanical Types

Figure 2. Type 2 Single Mechanical Seal Clamped or “J” Seat Type

Figure 3. Type 2 Single Sp ri n g Mechanical Seal O-Ring Seat Type

Figure 4. Type 8-1 Multi Spring Mechanical Seal Clamped or “J” Seat Type

Figure 5. Type 8-1 Multi Spring Mechanical Seal O-Ring Seat Type

Figure 6. Type 21 Single 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 Mechanical Seal O-Ring Seat Type

Figure 11. Type 2, Clamped Seat (Rotor (187, 218, and 312) Flexbox Rotor Size

Figure 10. Type BX Mechanical Seal

Figures 11 through 17 Mechanical Seal Information

Size187) Type 8-1 and 21, Clamped Seat

Figure 12. Type 2, 8-1 O-ring Seat (Rotor Size 250)

Figure 13. Type 2 O-ring Seat (Rotor Size 187 and 218) Type 8-1 and 21,

(Rotor Size 187, 218, 312)

O-ring Seat (rotor Size 187 and 218), Sealot (Rotor Size 187), Type 8B3

Figure 14. Type 2, 81 and O-ring Seat (Rotor Size 250)

Figure15. Type BX (Rotor Size 187 through 250)

Figure16. Type 9B3 (Rotor Size 187)

Figure 17. No Seal (Rotor Sizes 187 through 312

DISASSEMBLY AND ASSEMBLY PROCEDURES (PACKING PUMPS)

Disassembly Procedures (Figures 23 and 24) NOTE: Refer to pump assembly drawings, Figures 23 and 24, during pump disassembly. Disassembly

procedures for Figures 23 and 24 packing pumps are identical.

1. Close off suction and discharge piping to pump and disconnect piping. Remove tubing (031) from pump, ensuring that tubing (031) is not bent or flattened. Remove drain plugs (003). Remove pump from driver, coupling and mounting bracket. Remove coupling hub and key (027).

2. Remove bolts or capscrews (011) and inlet head (026) and gasket (008).

3. Remove bolts (024) with lockwashers (025), thrust plate (022) and spacers (023).

4. Remove idler cups (021), where applicable. *

5. Remove idler rotors (020) by unscrewing idlers (020) from housing (002) bores.

6. Loosen packing gland nuts (038) or capscrews (018) to relieve pressure on packing gland (017).

7. Remove capscrews or bolts (011). Pull assembled power rotor (012) from case (001).

NOTE: Removal of assembled power rotor will remove packing gland (017), packing (016), inboard cover

(009), balance piston housing (014), tube (004) with 0-rings (005), spacer (015) and 0-ring (007).

8. Remove gland nuts (038) or screws (018), washers (019) and packing gland (017) from power rotor (012).

9. Using a "packing puller" or sharp 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 spacer (015) from power rotor (012). Remove spacer (015) from tube (004) and remove tube (004) with O-rings (005) from balance piston housing (014). Remove 0-rings (005) from tube (004).

NOTE: If tube (004) is not removed with power rotor assembly (012), it will be removed from housing (002). NOTE: Balance piston (013) furnished as part of power rotor (012) and not serviced separately.

12. Remove housing (002) with 0-ring (006) from inlet end of case (001). Remove O-ring (006) from housing (002).

Assembly Procedures (Figures 23 and 24)

NOTE: Prior to assembly of pump, all parts should be cleaned and inspected for nicks and burrs. Replace

all worn or damaged parts. Imo Pump recommends automatic replacement of 0-rings, gasket, and packing when these parts are disturbed from their previously installed position. Refer to pump assembly drawings, Figures 23 and 24, and List of Material, Table 7, during pump assembly. Coat all parts with SAE-30 oil to assist in assembly. Assembly procedures for Figures 23 and 24 pumps are identical.

1. Install O-ring (006) on housing (002). Install housing (002), 0-ring end first, in inlet end of case (001) until housing (002) is flush with inlet end of case (001).

2. Install O-rings (005) on tube (004) and install tube (004) in housing (002). Install spacer (015) on tube (004).

Table 4

TORQUE VALUES - PACKING PUMPS

PART ROTOR SIZE TORQUE VALUE PART ROTOR SIZE TORQUE VALUE

011

(1)

(2)

187 218 250

35 lbs. ft. (± 5 lbs. ft.) 55 lbs. ft. (± 5 lbs. ft.) 70 lbs. ft. (± 5 lbs. ft.)

90 lbs. ft. (± 5 lbs. ft.) 75 lbs. ft. (± 5 lbs. ft.) 145 lbs. ft. (± 5 lbs. ft.)

010

024

218 250

187 218 250

30 lbs. ft. (± 5 lbs. ft.) 30 lbs. ft. (± 5 lbs. ft.)

10 lbs. ft. (± 2 lbs. ft.) 15 lbs. ft. (± 2 lbs. ft.) 15 lbs. ft. (± 2 lbs. ft.)

(1) Part Number Oil installed in inboard cover (009). (2) Part Number Oil installed in inlet head (026).

3. Install inboard cover (009) on power rotor (012). Install balance piston housing on power rotor (012) and install capscrews (010). Torque capscrews (010) to proper value listed in Table 4.

4. Install O-ring (007) on inboard cover (009).

5. Install assembled power rotor (012) in case (001).

NOTE: Ensure that tube (004) enters balance piston housing (014) tube bore

6. Install bolts or capscrews (011) in inboard cover (009). Torque bolts or capscrews (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 applicable.

9. Install spacers (023), thrust plate (022), lockwashers (025) and bolts (024). Torque bolts (024) to proper value given in Table 4.

10. Install gasket (008) and inlet head (026) using bolts or capscrews (011). Torque bolts or capscrews (011) to proper value listed in Table 4.

11. Install packing (016) in packing bore of inboard cover (009). Joints of packing (016) rings to be staggered and hard and soft rings alternately inserted, beginning with a hard ring.

12. Install packing gland (017). Install gland nuts (038) or screws (018) with washers (019). Tighten nuts (038) or screws (018) hand tight.

13. Install key (027) and coupling hub on power rotor (012).

14. Install drain plugs (003). Replace tubing (031) and fittings in proper position.

*Note: Some Idlers have a hydrostatic thrust design and do not need idler cups (21).

15. Connect pump to mounting bracket and coupling. Align pump with driver as described in CA-1 manual.

CAUTION

ATTENTION

When starting pump, adjust packing seepage to allow seepage of four to eight drops per minute. DO NOT over-tighten packing. Seepage from packing gland provides cooling and lubrication of packing.

I. TROUBLESHOOTING

For assistance with troubleshooting see the General Instruction Manual, CA-1.

J. FIELD AND FACTORY SERVICE AND PARTS

Imo Pump maintains a staff of trained service personnel that can provide pump installation, pump start-up, maintenance/overhaul and troubleshooting supervision as well as installation and maintenance training.

Our factories provide maintenance as well as overhaul and test facilities the in event the user prefers t o return pumps for inspection or overhaul. Factory-overhauled pumps are normally tested and warranted “asnew” 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 Department in Monroe, NC, USA.

Most pumps have repair kits available. Minor Repair Kits are used to repair leaking seals, bad bearings and/or for re-assembly after pump tear-down. They include (as applicable) pump shaft seals, packing, all gaskets/O-rings and bearings. Major Repair Kits are sufficient to rebuild completely worn-out pumps to “asnew” condition. They include all parts found in Minor Repair Kits plus all major internal parts subject to wear. Since kits have all necessary parts, kit purchase is preferred rather than selecting individual parts. When parts are individually selected from Parts List, some needed components are often overlooked. In addition, mixing worn or used parts with new parts risks rapid wear and shortened service life from new parts.