TM
INSTRUCTION MANUAL
AND
PARTS LIST
FOR
GGG3D SERIES PUMPS
This Instruction Manual and General Instructions Manual, CA-1, should be
read thoroughly prior to pump installation, operation or maintenance.
WARNING
Manual No. SRM00097
Rev. 00
1
March - 2011
READ THIS ENTIRE PAGE BEFORE PROCEEDING
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 this 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
accidental contact with equipment or liquids. Protection should be provided by
user to prevent accidental contact.
CAUTION
Failure to observe precautions noted in this box can cause damage or failure of
equipment.
Non compliance of safety
instructions identified by
the following symbol
Safety instructions where
electrical safety is
involved are identified by:
could affect safety for
persons:
ATTENTION
Safety instructions which
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 recommend you keep
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
pump refurbishment after internal inspection can be accomplished.
CONTENTS
Safety and Table of Contents ....................................................................................................2
A. General Instructions............................................................................................................. 3
B. Introduction.......................................................................................................................... 3
C. Description of Equipment.....................................................................................................3
D. Pump Model Identification ................................................................................................... 4
E. Ordering Instructions ........................................................................................................... 4
F. Operation ............................................................................................................................ 4
G. Parts List.............................................................................................................................. 5
H. Pump Maintenance.............................................................................................................. 6
L. Mechanical Seal Drawings .................................................................................................. 7
I. Troubleshooting................................................................................................................. 10
J. Field and Factory Service and Parts.................................................................................. 10
K. Assembly Drawings ........................................................................................................... 11
2
A. GENERAL INSTRUCTIONS
Instructions found herein cover disassembly, assembly and parts identification of
GGG3D series pumps.
NOTE: Individual contracts may have specific provisions that vary from this manual. Should
any questions arise which may not be answered by these instructions, refer to the
General Instructions Manual, CA-1, 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 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 most easily understood wording. Imo Pump must assume personnel
assigned to operate and maintain supplied equipment and apply 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.
If installation, operation, and maintenance instructions are not correctly and strictly followed
and observed, injury to personnel or serious damage to pump could result. Imo Pump
cannot accept responsibility for unsatisfactory performance or damage resulting from
failure to comply with instructions.
WARNING
B. INTRODUCTION
This instruction manual covers series GGG3D Imo pumps. This series of pumps has been designed
for use in high inlet pressure, lubricating, seal oil applications. Model and design construction of each
pump can be identified by designator code on pump nameplate. Definitions of model designators are
identified in figure 1.
C. DESCRIPTION OF EQUIPMENT
GGG3D 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.
D. PUMP MODEL IDENTIFICATION
This instruction manual covers Imo Series GGG3D pumps. The model of each pump is identified on
pump nameplate. Refer to figure 1 and table 2 for instructional keys when using this manual.
3
Y
Figure 1 – Model Designator Definitions
GG G 3D R S J -400 P
Basic Pump Modifiers
–
GG
Very High Inlet Pressure
–
Design Modification
G
Series
R, N –
Multi - Spring Balanced Seal
with Viton
–Multi - Spring Balanced Seal
with Neoprene
X –Special Seal
Blank
S –Steel Casing
–
Cast Iron Pump
Lead and Rotation
250 Size Pump
Blank = 2D, CW P = 1.6D, CW
G = 1.8D, CW AJ = 1.35D, CW
AK = 1.35D, CCW AG = 1.1D, CW
275 Size Pump
Blank = 2D, CW E = 1.7, CW
312 Size Pump
Blank = 2D, CW P = 1.6D, CW
S = 1.4D, CW T = 1.4D, CCW
AE = 1.2D, CW
400 Pump Size
Blank = 2D, CW P = 1.6D, CW
AJ = 1.35D, CW
Rotor Size
J –Silicon Carbide Seat
E. ORDERING INSTRUCTIONS
When corresponding with Imo Pump regarding Series GGG3D 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.
F. OPERATION
F.1 LIQUID LIMITATIONS
Never operate with thin liquids such as solvents or water. Pump is designed for liquids having
general characteristics of oil.
4
F.2 OPERATING LIMITS
Operating conditions, such as speed, fluid viscosity, temperature, inlet pressure,
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
verifying system operating requirements are within pump’s capabilities.
Under no circumstances are the following operating limits (specified in table 1) to be exceeded
without specific approval from Imo Pump.
Table 1 – Normal Pump Operating and Structural Limits
CAUTION
ATTENTION
Condition Limit
Maximum Speed
Viscosity Range 32 SSU to 15000 SSU
Liquid Temperature Range 0°F to 250°F
Maximum Inlet Pressure 400 psig
3500 rpm For Size 250
2500 Rpm for Sizes 275, 312, 400
Maximum Discharge Pressure (Continuous Duty) 500 psig
Filtration Refer to General Instruction Manual, CA-1
Drive Direct or Belt
Mounting Foot mounted in any attitude
5
G. PARTS LIST
Table 2 – Pump Parts List
IDP QTY DESCRIPTION KIT IDP QTY DESCRIPTION KIT
1 1 Case 23 2 Thrust Hex Cap Screws
2 1 Housing XX 24 2 Thrust Plate Washer
3 1 Seal Vent Plug
25 1 Mechanical Seal X
(All Sizes but 400)
4 1 Anti-Rotation Tube XX 26 1 Inlet
5 2 Tube O-ring X 27 1 Tube Spacer (250 Only)
6 2 Housing O-ring X 28 1 Housing Spacer
(275 and 400 Only)
7 1 Inboard Cover O-Ring X 30 16 Outlet Washers (400 Only)
8 1 Inlet O-ring X 31 1 Pin Stop (400 Only) XX
9 1 Inboard Cover XX* 33 1 Fastener Seal (400 Only) X
10 8 Inlet Hex Bolts 38 1 Seal Spacer (Not 312)
11 1 Power Rotor XX 44 1 Seal Seat Adapter O-ring X
12 8 Seal Spacer Set Screws
(250 Only)
46 4 Thrust Spacer O-Rings
(312 Only)
XX
13 1 Retaining Ring X 67 4 Pipe Plugs
14 1 Spacer/Seal Seat Adapter 86 1 Bushing (275 Only) XX
15 1 Bearing X 92 1 Seal Spacer O-ring
X
(250 Only)
16 1 Key 93 8 Front Cover Hex Bolts
(Except 312 Size)
17 1 Bearing Retainer 94 1 Bearing Lockwasher X
18 4 Bearing Retainer Hex Bolts 96 1 Bearing Locknut
19 2 Idlers XX 97 1 Bearing Spacer Set
20 2 Idler Cups XX 98 1 Balance Piston Housing
(Except 312 Size)
21 1 Thrust Plate XX 99 1 BP Housing O-ring (275 and
250 Only)
XX**
X
22 2 Thrust Spacers 100 1 Nilos Ring X
X = Minor Repair Kit Items. XX=Major Repair Kit Items. (Items marked (X) included in Major Repair Kit.)
XX* = Only required in 250 size major kit
XX** = Only required in 275 and 400 size major kit
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.
6
H.1 GENERAL COMMENTS
NOTE: Part number identifiers (IDP) contained within parenthesis, such as (9), refer to circled
numbers shown on assembly drawing.
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.
H.3
Pump Disassembly:
Determine pump model on pump nameplate to select applicable pump assembly shown in Figures
2, 3, 4, or 5. Refer to that assembly for the following instructions.
NOTE: GGG3D pumps incorporate highly finished precision parts that must be handled carefully to
avoid damage to critical machined surfaces. Parts removed should be tagged for identification and
their exact positions in pump carefully noted so that new parts, or same parts, are properly
replaced without damage
CAUTION
Fluid leakage from disassembly of pump may make floor slippery and cause personal injury.
SPECIAL NOTE: To service mechanical seal and ball bearings ONLY perform H.3, Steps 1,
8, 9, 10 and 11 and H.4, Steps 18 thru 21 ONLY.
1. Close suction and discharge piping to pump. Vent pressure from pump. Disconnect piping.
Remove drain plugs (67) and drain unit. Remove pump from driver, coupling and base plate.
Remove coupling hub and key (16).
2. Remove inlet head (26) from case (1) by removing bolts (10) (and lockwashers (30) on size
400 only). Remove and discard O-ring (8) from inlet head (26). Remove spacer (28) on sizes
275 and 400).
3. Remove thrust plate (21) and spacers (22) by removing bolts (23) and lock washers (24).
4. If pump is 400 size, remove O-rings (46) from inside spacers (22).
5. Remove cups (20) from idlers (19).
6. Remove idlers (19) from housing (2) by unscrewing them from housing bores.
Do not permit idlers (19) to drop as they emerge from housing (2).
7. On 400 size only, Remove pin stop (31) and fastener seal (33) from case (1).
8. Remove bearing retainer (17) from inboard cover (9) by removing bolts (18).
CAUTION
ATTENTION
7
9. Remove assembled power rotor (11) from inboard cover (9). Removal of power rotor (11)
includes removal of snap ring (13), ball bearings (15), seal seat adapter (14), spacer (38) (Not
on 312), spacer (38) O-ring ((92) 250 size only), bearing lockwasher (94), bearing nut (96),
bearing spacer set (97), nilos ring (100) and mechanical seal (25).
10. Disassemble power rotor (11) as follows:
a. Using a spanner wrench, remove bearing locknut (96) and bearing lockwasher (94).
b. Ball bearings (15) are assembled to power rotor (11) with light press fit. They may be
removed with either bearing puller or vertical arbor press. When using press, set power
rotor (11) vertical with side of seal seat adapter (14) nearest O-ring (44) on press. Position
press ram against power rotor (11) coupling end face. Gently press power rotor (11)
through ball bearing (15) until snap ring (13) moves away from, bearing (15). Remove snap
ring (13). Continuing pressing shaft through outer bearing until outer bearing is free.
Remove bearing spacer set (97). Continue pressing shaft until inner bearing is free. Ensure
power rotor (11) does not fall to floor once ball bearing (15) is off of its diameter).
c. Remove seal seat adapter (14) with stationary seal seat from shaft (11). Remove
stationary seat with O-ring from seal seat adapter (14).
d. On sizes 275, 312 and 400, remove rotating seat of seal (25) from shaft after undoing
setscrews on seal and then if pump is 275 or 400 size, remove or seal spacer (38). If pump
is 250 size, remove seal (25) after loosening set screws in seal (25). Then remove spacer
(38) after loosening set screws (12). Finally remove O-ring (92)
11. Remove O-ring (44) from inboard end cover (9).
12. Remove inboard cover (9) by removing bolts (93) or ((10) on 312 size) and washers ((30), on
size 400 only)).
13. Remove and discard O-ring (7) from inboard cover (9).
14. Remove balance piston housing (98) with O-ring (99 ((6) on size 400)) on all sizes except 312.
This can be accomplished by pushing on suction end of housing (2) until balance piston (98)
emerges.
15. On all sizes but 312, remove and discard balance piston O-ring (99) or ((6) on size 400).
16. Remove spacer (27) on size 250 only. Remove tube (4) with O-rings (5) from housing (2) or
balance piston housing (98). Discard O-rings (5).
17. Remove housing (2) and O-ring (6) from discharge end of case (1). Discard O-ring (6).
H.4 PUMP ASSEMBLY
NOTE: Prior to reassembly of pump, clean and inspect all parts for nicks and burrs. Replace
all worn or damaged parts. Imo Pump recommends replacement of all O-rings, gaskets
mechanical seal and ball bearing when these parts are disturbed from their previously
installed positions. Coat all parts with light lubricating oil to assist in assembly.
1. If pump is a 250 or 275 size, proceed to step 2 below. If pump is a 312 skip to step15. If
pump is a 400 size skip to step 9.
2. Install O-rings (5) on tube (4) and tube (4) in balance piston housing (98).
8
3. Install O-ring (99) on balance piston housing (98) and then balance piston housing (98) in
case (1). Be sure to line up bolt holes in balance piston housing (98) so that tube (4) is in a
vertically, facing up position.
4. Install O-rings (7) onto back of balance piston housing (98) and then install inboard cover (9)
into case (1) with bolts (93). Be sure seal drain hole (3) is in a vertically facing up position.
Torque bolts to value on appropriate assembly drawing.
5. Install spacer (27) on tube (4) if pump is 250 size.
6. Install O-ring (6) in groove in housing (2). Install housing (2) O-ring end first, in pump case
(1) from suction end and push it in as far a possible. Be sure that hole in housing (2) lines up
with tube (4) in balance piston housing (98).
7. Install spacer (28) in case (1) if pump is 275 size.
8. Skip to step 18.
9. Install O-ring (6) in groove in housing (2). Install housing (2) O-ring end first, in pump case
(1) from suction end and push it in as far a possible being sure that stop pin (31) hole lines
up with anti-rotation hole in housing (2). Install fastener seal (33) and stop pin (31) in case (1)
being sure that goes into anti-rotation hole in housing (2).
10. Install spacer (28) in case (1).
11. Install O-rings (5) on tube (4) and tube (4) in housing (2).
12. Install O-ring (6) on balance piston housing (98) and then balance piston housing (98) in
case (1) being sure that tube (4) in housing (2) lines up with hole in balance piston housing
(98).
13. Install O-rings (7) onto inboard cover (9) and inboard cover (9) into case (1) with washers
(30) and bolts (93). Be sure seal drain hole (3) is in a vertically facing up position. Torque
bolts to value on appropriate assembly drawing.
14. Skip to step 18.
15. Install O-rings (5) on tube (4) and tube (4) in inboard cover (9).
16. Install O-ring (7) on inboard cover (9) and l inboard cover (9) in case (1) using bolts (10). Be
sure seal drain hole (3) is in a vertically facing up position. Torque bolts to value on
appropriate assembly drawing.
17. Install O-rings (6) onto housing (2). Install housing (2) into case (1) being sure that tube (4) in
inboard cover (9) lines up with hole in housing (2).
18. Inspect power rotor (11) shaft and remove any nicks or burrs which are present.
power rotor shaft to remove any rust or oxidants that may be present under shaft sleeve. Imo
pump recommends replacement of ball bearing (15), mechanical seal (25), and all O-rings
when these parts are disturbed from their original installed position. All parts should be
coated with light lubricating oil to assist in assembly.
19. Assemble power rotor (11) and mechanical seal (25) as follows:
Polish
9
a. If pump is a 250 assemble O-ring (92) in groove in shaft (11) Screw setscrew (12)
into seal spacer (38) and install seal spacer (38) on shaft (11). Tighten setscrew
(12). If pump is a 275 or 400 size, slide spacer (38) onto shaft (11). The 312 size has
no spacer
b. Coat O-ring in sleeve of rotating seat, or O-ring on rotating seat of seal on 250 size
seal, with system fluid and slide mechanical seal rotating assembly, or rotating seat
on size 250, on power rotor (11) until it seats against shoulder of seal spacer (38) or
power rotor balance piston on 312 size. Tighten rotating seat set screw. Wipe seal
face with isopropyl alcohol and lint free cloth.
c. Install O-ring in groove of mechanical seal stationary seat. Install seat including O-
ring in seal seat adapter (14) ensuring that groove in back of stationary seat mates
to spring pin in seal seat adapter (14). Clean seal face with isopropyl alcohol and lint
free rag. Put a small amount of clean system fluid or light oil on seal running face.
Install rotating face of seal in seal seat adapter (14) against stationary seat face.
d. Install inner snap ring (13) in groove of power rotor (11).
e. Install nilos ring (100) on seal seat adapter (14).
CAUTION
ATTENTION
In next step you will install bearings on shaft. Be sure to used cylindrical sleeve to
press only on inner race when installing bearing. Pressing on outer race could
damage bearing.
In next step you will also be greasing ball bearings. Bearing should be approximately
1/3 full of grease. Over greasing bearing can lead to overheating and damage to
bearing.
CAUTION
ATTENTION
10
f. Put the thread section of power rotor (11) on a press and press inner ball bearing
(15) onto power rotor (11) pressing only on inner race of ball bearing, using an
installation sleeve, until ball bearing is located next to snap ring (13). Fill bearing
approximately 1/3 full of Royco 13 or equivalent bearing grease.
g. Install spacer set (97) on shaft (11). Fill spacer set approximately 3/4 full of Royco
13 or equivalent bearing grease.
h. Install outer ball bearing (15) onto power rotor (11) pressing only on inner race of ball
bearing using an installation sleeve until it located next to spacer set (97). Fill
bearing approximately 1/3 full of Royco 13 or equivalent bearing grease.
i. Install bearing lock washer (94) and then screw on bearing lock nut (96) with
spanner wrench until it is a tight as possible without using an extension on spanner
wrench. (At least one of tangs in lock washer (95) must line up with one of grooves
in lock nut (96). Bend tang from lock washer (94) into groove in locknut (96).
20. Install O-ring (44) into inboard cover (9) and then assembled power rotor (11) into inboard
cover (9).
21. Install bearing retainer (17) onto inboard cover with hex bolts (18). Torque bolts to value on
appropriate assembly drawing.
22. Install idlers (19) into housing (2) by meshing threads with power rotor thread.
23. Install idler cups (20) on idlers (19).
24. Install bolts (23) and lock washers (24) in thrust plate (21). Install spacers (22) on bolts (23).
25. Install thrust plate assembly including thrust plate (21), washers (24), bolts (23) and spacers
(22) on housing (2). Torque bolts (23) to value on appropriate assembly drawing.
26. Install O-ring (8) in groove in inlet head (26).
27. Install inlet head (26) using bolts (10) (and lockwashers (30) if size 400). Torque bolts to
value on appropriate assembly drawing.
28. Install drain plug (67) with Loctite.
NOTE: Inlet head (26) can be rotated and repositioned in 90 degree increments to suit suction
piping. To change inlet position remove bolts (10) and rotate inlet head to desired
position. Install bolts (10) and torque to proper values indicated on assembly drawing.
29. Install coupling hub key (16). Install and align pump and driver as specified in General
Instruction Manual, CA-1.
I. TROUBLESHOOTING
For assistance with troubleshooting see the General Instruction Manual, CA-1.
11
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 user prefers to
return pumps for inspection or overhaul. Factory-overhauled pumps are normally tested and warranted
“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
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 wornout pumps to “as-new” 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.
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A Colfax Business Unit
IMO Pump
1710 Airport Road 28110
PO Box 5020
Monroe, NC/USA 28111-5020
TEL: 1+ (704)289-6511
Email: imo.pump@colfaxcorp.com
Web: www.imo-pump.com
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