Eco GA Series Instruction manual

ECO®
GEARCHEM PUMPS
GA/GC SERIES
Installation, Operation &
Maintenance Manual
Bulletin: IOM ECO 3000 REV C

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ECO®FACTORY SERVICE POLICY
Should you experience a problem with your ECO pump, first consult the troubleshooting guide in your
operation and maintenance manual. If the problem is not covered or cannot be solved, please contact your
local Pulsafeeder Sales Representative, or our Technical Services Department for further assistance.
Trained technicians are available to diagnose your problem and arrange a solution. Solutions may include
purchase of replacement parts or returning the unit to the factory for inspection and repair. All returns require
a Return Authorization number to be issued by Pulsafeeder. Parts purchased to correct a warranty issue
may be credited after an examination of original parts by Pulsafeeder. Warranty parts returned as defective
which test good will be sent back freight collect. No credit will be issued on any replacement electronic parts.
Any modifications or out-of-warranty repairs will be subject to bench fees and costs associated with
replacement parts.
TRADEMARKS
ECO® is a registered trademark of Pulsafeeder, Inc.
Pulsafeeder® is a registered trademark of Pulsafeeder, Inc.
SAFETY CONSIDERATIONS:
•Read and understand all related instructions and documentation before attempting to install or maintain
this equipment
•Observe all special instructions, notes, and cautions.
•Act with care and exercise good common sense and judgment during all installation, adjustment, and
maintenance procedures.
•Ensure that all safety and work procedures and standards that are applicable to your company and
facility are followed during the installation, maintenance, and operation of this equipment.
Copyright ©2020 Pulsafeeder, Inc. All rights reserved.
Information in this document is subject to change without notice. No part of this publication may
be reproduced, stored in a retrieval system or transmitted in any form or any means electronic
or mechanical, including photocopying and recording for any purpose other than the purchaser’s
personal use without the written permission of Pulsafeeder, Inc.

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CONVENTIONS
AWARNING DEFINES ACONDITION THAT COULD CAUSE DAMAGE TO BOTH THE
EQUIPMENT AND THE PERSONNEL OPERATING IT. PAY CLOSE ATTENTION TO ANY
WARNING.
NOTES ARE GENERAL INFORMATION MEANT TO MAKE OPERATING THE EQUIPMENT
EASIER.
REVISION HISTORY
Revision #
Implemented By
Revision Date
Approved By
Approval Date
Reason
B
Kristin Lenzi
June 2021
Phuoc Pham
6/7/2021
New format
General update
Recommended torque
values and statement
regarding Teflon gears and
wear plates.
C
Kristin Lenzi
06/14/2021
Kristin Lenzi /
Jeff Martin
06/15/2021
Updated the IOM with the
following new drawings:
SD-2847, SD-2848, SD-
2849, SD-2854, SD-2855,
SD-2856

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TABLE OF CONTENTS
ECO®FACTORY SERVICE POLICY ...........................................................................................................2
TRADEMARKS .............................................................................................................................................2
1. INTRODUCTION...................................................................................................................................5
2. EQUIPMENT INSPECTION..................................................................................................................5
3. INSTALLATION....................................................................................................................................6
3.1 MECHANICAL SEALS ..............................................................................................................7
3.2 PACKED STUFFING BOXES..................................................................................................7
4. OPERATION.........................................................................................................................................7
5. MAINTENANCE....................................................................................................................................8
5.1 RECOMMENDED SPARES...................................................................................................10
5.2 DISASSEMBLY........................................................................................................................10
5.3 REASSEMBLY .........................................................................................................................12
5.4 BOLT-ON THERMAL JACKETS INSTALLATION..............................................................14
5.5 REMOVAL.................................................................................................................................15
6. TROUBLESHOOTING........................................................................................................................16
7. TORQUE CHART ...............................................................................................................................17
8. PUMP SPECIFICATION CHART .......................................................................................................18
9. EXPLODED VIEW DRAWING –G2 & G4 SERIES...........................................................................19
10. EXPLODED VIEW DRAWING –G6 & G8 SERIES.......................................................................20
11. EXPLODED VIEW DRAWING –GH8 SERIES..............................................................................21
12. EXPLODED VIEW DRAWING –GA12 & GA16 SERIES..............................................................22
13. SEAL ARRANGEMENT DRAWINGS............................................................................................23
14. PUMP TO MOTOR ASSEMBLY INSTRUCTIONS ........................................................................28
15. GEARCHEM PUMP PRESSURES.................................................................................................29

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1. INTRODUCTION
Eco Gearchem pumps are constructed in 316SS, Alloy 20 and Alloy C. Gears are available
in Alloy C, Alloy 20, glass filled TFE, Carbon/Graphite and PEEK. These pumps are used for
the reliable handling of clear lubricating and non-lubricating fluids. These pumps operate
over a broad range of temperatures, pressures and corrosive services for transfer
applications, cyclic operations or continuous production systems.
Self-priming Gearchem pumps can be operated over the entire pH range, for indoor and
outdoor service, at system pressures from as low as 1 mm Hg abs (vacuum) to 100 psi
differential pressure and over a temperature range from -100°F to + 450°F (-73°C to
+232°C). Gearchem pumps are available in flows up to 55 gpm and can be used to pump
liquids with viscosities ranging from less than 1 cps up to 100,000 cps with reduced speeds.
Gearchem pumps may be quickly inspected in the field. All that is required to inspect the
internal components is the removal of the rear housing. Before attempting an inspection or
repair be sure to read and thoroughly understand this maintenance manual.
Pumps may be repaired either in the field or at an authorized Eco Repair Center (contact
your Eco distributor for details). Field repairs can be done very quickly using an Eco KOPkit
which includes all the parts necessary to cover practically all routine maintenance
requirements.
2. EQUIPMENT INSPECTION
1. Check all equipment for completeness against the order and for any evidence of
shipping damage. Shortages or damage should be reported immediately to the
carrier and to your Eco distributor.
2. If the pump is not going to be installed immediately, the following steps should be
taken.
•Leave pump in original shipping carton.
•Store indoors in a dry ambient atmosphere. Avoid temperature variations.
•Leave all shipping plugs in place.
•Contact the motor manufacturer for specific motor storage information.
3. Occasionally during shipment, possible misalignment or other damage such as
cracked mechanical seal faces can occur. For this reason, it is recommended that
each unit be tested with water in some convenient area prior to piping into the actual
process system.
4. These instructions should be read carefully by the personnel responsible for
installation, operation and maintenance of the equipment and kept in a convenient
place for ready reference. It is recommended that a copy of the Eco order be kept
with this manual as well as a written record of the pump model number which is on
the name tag attached to the pump. A space has been provided inside the front cover
of the manual to record this number.

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Figure 1
3. INSTALLATION
1. Pump installation site should be selected to provide easy access for routine
maintenance and to protect the pump from damage by the elements or from leaks or
drips from nearby process equipment.
2. Suction and discharge ports of Eco Gearchem pumps can be determined as follows:
A. Looking at the pump drive shaft, the suction port is to the right of the shaft,
when the shaft rotates clockwise and the drive shaft is located below
the ports for standard configuration on Model G2, G4, G6, GB and GHB.
B. Looking at the pump drive shaft, the suction port is to the left of the shaft, when
the shaft rotates clockwise, and the drive shaft is located above the ports for
standard configuration on Models GA 12 and GA 16.
C. Reversing drive shaft rotation reverses flow and thus suction and discharge ports
for all models.
3. Keep suction lines short, straight and of sufficient size to minimize friction loss to the
pump. Make sure there is sufficient suction supply, so that pump will not starve or
run dry. Flooded suction or gravity feed of fluid to pump inlet is generally preferred.
4. Use only full-bore ball valves or gate valves in the suction piping. If suction strainers
are required, size them to minimize pressure drop and select those of a type that are
easily cleaned.
5. Arrange all suction piping and fittings to prevent formation of air pockets. Make sure
all joints are tight.
6. Flush and blow out all suction lines prior to mating up to pump. Use nipples and
unions, or spool pieces with flanged pumps, for ease of maintenance.
7. Do not spring piping, either suction or discharge, when mating up to pump. Use
supports or hangars at intervals as required. When necessary, provide for thermal
expansion and contraction so that no strain is placed upon the pump.
8. Check carefully alignment of pump and motor or drive system. Improper alignment is
one of the most common causes of seal and stuffing box problems, as well as a
major cause of rapid bearing wear and eventual pump failure.
9. Check all bolts and nuts for tightness. Correct any conditions which could cause
destructive vibration or leakage.
10. Where required, provide proper system for seal flush, and/or drain. Observe any
special instructions for packing lubrication.
11. If start-up screens are used be sure they do not clog and starve suction. Start-up
screens should be removed prior to placing system into regular operation.

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12. If flexible suction lines are used be sure their selection and installation will prevent
wall collapse and thus a starved suction condition.
13. When taking suction from a tank or vessel, avoid entry of sludge, solids, etc. into
suction line by placing suction line inlet above maximum expected level of solids.
14. Discharge lines from Gearchem pumps should be fitted with properly sized relief
valves to protect both pump and discharge system. Relief valve outlet should be
piped back to suction vessel.
15. When a by-pass system is used to control flow from the pump, the bypassed fluid
should be piped back to the suction vessel to prevent heat build-up due to
recirculation. If it is absolutely necessary to pipe by-pass back to the pump suction
line, the point of entry should be at least 10 pipe diameters away from the suction
inlet. Provision for cooling should be made in the event of excessive heat buildup
through fluid recirculation.
16. Where pumped fluids may solidify, crystalize, precipitate etc., provision should be
made to thoroughly flush pump and piping during periods of shutdown. Pay particular
attention to proper flushing of seal or stuffing box area.
3.1 MECHANICAL SEALS
Three basic seal types are offered as standard: internal, external, and double seal. All
mechanical seals require cooling and lubrication. For long and trouble-free seal life:
1. Do not run pump dry. Make sure pump is primed, suction is not starved, sufficient
NPSH is available and your system is such that seal surfaces are wet. If a seal flush
system is used, make sure that it is operating while the pump is operating. Double
seals require a seal flush.
2. Keep abrasives out of the seal area. Dirty flush streams, whether piped from the
pump discharge or from a separate source, will destroy the rotating and stationary
seal mating surfaces.
3. Make sure pump and driver are properly aligned. Misaligned seal mating surfaces will
not function. Excessive vibration will also prevent proper seal function and cause
early failure.
4. Determine that seal materials of construction are compatible with pumped fluid. Be
sure to check this when changing application.
3.2 PACKED STUFFING BOXES
The basic housekeeping procedures for mechanical seals also apply to packed pumps.
For proper operation, the stuffing box area must be cooled and lubricated. Do not
overtighten packing. Where packing lubricant IS required, use it. Run in new packing
carefully. Care and time taken at this stage will minimize down time and maintenance
costs. Misalignment and vibration also shorten packing life. Flush streams to lantern ring
stuffing boxes are as important as flush streams to mechanical seals.
4. OPERATION
1. Prior to operation, recheck installation according to instructions. Be sure electrical
service to motor agrees with nameplate requirements. Jog to check rotation and
rewire motor if necessary.
2. Lubricate packing, if required, using suitable lubricant. Where pump is equipped with
lantern ring stuffing box and recirculating flush check for proper piping from pump
discharge to lantern ring nipple. Where thorough flush of lantern ring stuffing box is
intended, check flush stream piping to and from stuffing box.
3. Check mechanical seal flush arrangements where used. Pressurized flush to double
seal chamber must be in operation, at an inlet pressure of 10 to 15 psi above
intended pump discharge pressure, prior to and when operating pump. Flush must

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continue when pump is stopped until pump pressure is reduced to within 20 psi of
double seal chamber pressure.
4. Where external seal cooling is required, provide for drip feed of cooling liquid over
rotating seal head. Where internal seal cooling and lubrication by flush stream is
intended, check piping from pump discharge to seal housing or from external source
to seal housing. Make sure all flush streams are clean.
5. Make sure discharge valves are open, start pump and check for proper operation.
Adjust packing as necessary, but allow sufficient time for proper run in. Check flush
streams for proper operating pressure and flow. If pump bearing areas run hot, or
seal/stuffing box areas run hot, shut pump down and determine cause.
6. Do not run dry.
7. Do not pump abrasives.
8. Do not run metal/metal gears below 100 cPs or faster than 1450.
9. For pumps with Teflon gears and wear plates, hand-tighten the rear housing bolts.
Slowly increase the speed and pressure. Gradually increase the torque value of the
housing bolts until the pressure is achieved. Do not exceed the recommended
torque values.
5. MAINTENANCE
The timing for maintenance of the pump is established primarily on past performance.
Each installation is different. Therefore, detailed maintenance records of past
performance can be invaluable for determining future preventative maintenance intervals.
During routine pump inspections pay particular attention to the mechanical seal and
bearing areas because those areas will determine future maintenance intervals. For
motor maintenance instructions consult the motor manufacturer.
WARNING: BEFORE PERFORMING ANY MAINTENANCE REQUIRING PUMP
DISASSEMBLY, BE SURE TO FLUSH PUMP THOROUGHLY WITH A
NEUTRALIZING FLUID. WEAR PROTECTIVE CLOTHING AND HANDLE
EQUIPMENT WITH PROPER CARE.
1. Changing Service
When changing a pump from one service to another, be sure to check that all wetted
pans of the pump (including seals) are compatible with the fluid to be handled and that
the motor is sufficiently sized for the application. If in doubt, contact your Eco distributor.
2. Inspect for Wear
Whenever gear pumps exhibit reduced flow rates, inability to maintain pressures, noisy or
otherwise abnormal operation, first refer to the troubleshooting section. If the problem
cannot be resolved the pump must be inspected for wear or damage. Eco Gearchem
pumps can be easily opened for cleaning and inspection without disturbing piping
connections by removing the pump rear housing.
Where inspection shows wear, rebuilding the pump using an Eco KOPkit is strongly
recommended. Where pumps are equipped with two metallic or plastic gears,
replacement with a new set is preferred. Pumps have a metallic drive gear and plastic
idler gear can often be restored to original performance by replacing the idler gear alone.
3. Mechanical Seal Design
Eco Gearchem pumps equipped with mechanical seals use either single internal, single
external, or a double seal. In addition, there is a variation for vacuum service, of the
external seal whereby the seal housing is lengthened between the seal and the pump. All
seals are Type 9. These configurations are illustrated in Drawing SD-2652 and SD-2778.

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All mechanical seal types used in Eco Gearchem pumps consist of a rotating seal head
fixed to the shaft with set screws and a stationary seal face (or faces in the case of
double seals) mounted in the seal housing with a TFE O-ring gasket.
4. Mechanical Seal Maintenance
For proper seal functioning, the following conditions must be met:
A. The seal faces must be smooth, free of cracks, chips, or ridges and free of score
marks particularly those which emanate radially. Seal faces showing only light
scratches or marks may be re-lapped. Eco lapping standards are smooth and flat to 3
helium light bands. Avoid touching sealing faces.
B. The seal faces must be perpendicular to the shaft axis and run true. A bent shaft can
prevent proper sealing.
C. Secondary sealing elements such as O-rings and Teflon® wedges must be installed
so as not to pinch, cut or damage them. The use of a "bullet" to introduce the seal
head onto the shaft helps prevent damage Also the use of a lubricant that IS
compatible with the fluid being pumped is helpful.
D. The shaft must be free of nicks and scratches in the sealing area, particularly spiral
scratches When reinstalling a Type 9 seal head make sure the setscrews are
backed out so as not to damage the shaft when sliding the seal on.
E. Install the seal with the correct compressive contact. Dimensions and directions are
given for each model in the Reassembly Section.
F. A seal flush must be used for all double seal installations. The flush must be clean
and introduced at a pressure about 10 to 15 psi higher than discharge pump
pressure. For best results the flush inlet should be connected to the lower of the two
flush connections.
G. When reinstalling refurbished seal seats, always use a new seal seat O-ring. Slowly
heat TFE O-ring in water or other suitable solution until temperature reaches 160° -
175°F. Slip over seal set into position on O-ring groove and let cool. Do not use any
pointed or sharp-edged instruments that might cut or damage the O-ring during this
operation. New seal seats shipped from the factory include the O-ring already fitted to
the seat.
5. Stuffing Box Design
Eco Gearchem pumps with packing use either a plain stuffing box or one equipped with a
lantern ring. GH8, GA-12 and GA-16 packed pumps are supplied only in the later
configuration.
6. Stuffing Box Maintenance
Install packing rings carefully in the sequence noted on the drawings. Be sure gland is
clean and that shaft is not scored. New packing on a damaged shaft will not seal. Where
lantern rings are used, check to make sure they are properly positioned under the fitting
so that flush streams or lubricants will have access to the lantern ring.
Recommended lubricants are:
Service
•Solvents
•Acids/Alkalis
•High temperatures
Lubricant
•Soap-free grease
•Fluorocarbon grease
•Silicone/Carbon/Graphite

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Typical Source
•Keystone 5P9
•Halocarbon 25!20M
•Dow Corning 41
Do not overtighten packing. Run in a new set carefully, taking up on the gland nut a little
at a time. If the gland runs hot, it is generally a sign that the packing is too tight. Damage
to both shaft and packing will result. A properly packed and adjusted stuffing box will leak
perhaps 10 drops every 3 to 5 minutes
7. Significant Model Number
The significant model number stamped on the pump nameplate identifies the pump type,
the seal arrangement, and other details. Refer to the significant model number chart in
this manual if you are unsure of exactly what type of pump or seal you have.
Always refer to the full model number in any correspondence with your Eco distributor.
Drawings and a consolidated parts list for each Gearchem pump are included in this
manual. Recommended spare parts are denoted on the consolidated parts list.
5.1 RECOMMENDED SPARES
KOPkit: The basic Gearchem KOPkit consists of the following parts which are
recommended as spares:
•Drive Shaft Idler Shaft Drive Gear Idler Gear
•Drive Gear Key
•Idler Gear Key
•Bearings Wear Plates Bearing Lock Pins Housing 0-Rings
•Drive Gear Retaining Rings
•Idler Gear Retaining Rings
•Shaft Seal Arrangement as Required*
*(Packing or Mechanical)
A KOPkit is completely identified by placing the letter "K" before the pump significant
model number and deleting the hyphens. Example: A KOPkit for G6-ACT-KKT would be
KG6ACTKKT.
5.2 DISASSEMBLY
Prior to any disassembly please:
•Close discharge and suction valves
•Disconnect power source to motor
•Flush and drain pump
A. Single Internal Mechanical Seal (G2, G4, G6, G8)
Reference drawing SD-2537, SD-2538
1. Loosen gland lock nut (Item 35) and unscrew gland nut (Item 36).
2. Pull out seal seat (Item 55) with seat O-ring. Inspect as noted previously.
3. Remove either pipe plug (Item 62) and rotate shaft to allow access to seal head set
screws. Loosen screws sufficiently to allow removal of seal head (Item 60).
4. Turn pump so that drive shaft is pointing down thereby allowing seal head to slide off
shaft. If seal head does not come out easily, it will be necessary to remove the seal
housing (Item 30)
a. Back off seal housing lock nut (Item 32).
b. Unscrew seal housing (Item 30) to expose seal head (Item 60).

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c. When reassembling, fit new seal housing gasket (Item 31).
d. Inspect seal head as noted previously.
B. Single Internal Mechanical Seal (GH8, GA12, GA16)
Reference drawing SD-2613, SD-2775
1. Remove seat retainer bolts (Item 39A) and seat retainer (Item 36) with seat retainer
pin, drive end seal seat (Item 55) with seat ring and seat retainer O-ring (Item 37).
2. Visually inspect drive end seal seat (Item 55).
3. If replacement is required, carefully remove drive end seal seat (Item 55) by inserting
an "L" shaped tool between seal seat and seat retainer (Item 36) and exert a firm
pulling action.
4. Remove pipe plug (Item 62 or 63) on top of drive end of front housing (Item 1) and
rotate shaft to allow access to seal head (Item 60) set screws. Loosen screws
sufficiently to allow removal of seal head (Item 60) and withdraw over shaft. Inspect
seal head. Replace if necessary.
C. Single External Mechanical Seal (G2, G4, G6, G8)
1. Loosen set screws in seal head and slide seal head off shaft.
2. Loosen gland Jock nut (Item 35) and unscrew gland nut (Item 36).
3. Pull out seal seat (Item 55) with seat O-ring.
4. Inspect seal seat and seal head as noted previously.
D. Double Mechanical Seal (G2, G4, G6, G8)
Reference Drawings SD-2537, SD-2538
1. Loosen gland lock nut (Item 35) and unscrew gland nut (Item 36).
2. Pull out drive end seal seat (Item 55) with seat O-ring. Inspect as noted previously.
3. Remove flush connection so as to give access to seal head set screws. Rotate shaft
to allow access to seal head set screws and loosen set screws to allow removal of
seal head (Item 60). With G6 pumps, seal housing must be unscrewed to allow
access to set screws. (See Step 5).
4. Remove seal head (Item 60) and inspect as noted above.
5. Loosen seal housing lock nut (Item 32) and unscrew seal housing (Item 30).
6. Pull out pump end seal seat (Item 56) with seat O-ring. Inspect as noted previously.
E. Double Mechanical Seal (GH8, GA12, GA16)
Reference Drawing SD-2613, SD-2775
1. Remove seat retainer bolts (Item 39A) and seat retainer (Item 36) with seat retainer
pin holding the drive end seal seat with seat ring and seat retainer O-ring.
2. Visually inspect drive end seal seat.
3. If replacement is required, carefully remove drive end seal seat by inserting an "L"
shaped tool between seal seat and seat retainer (Item 36) and exert a firm pulling
action.
4. Remove pipe plug (Item 62 or 63) on top of drive end of front housing (Item 1) and
rotate shaft to allow access to seal head and withdraw over drive shaft (Item 4).
Inspect seal head. Replace if necessary.
5. Visually inspect pump end seal seat.
6. If replacement is required, it will be necessary to remove front housing (Item 1) from
the pump. Disconnect any piping from front housing to allow disassembly.
7. Unbolt front housing (Item 1) from enter housing (Item 2) and carefully slide the front
housing over drive shaft (Item 4).
8. To replace pump end seal seat carefully remove by inserting an "L" shaped tool
between seal seat and front housing and exert a firm pulling action.

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F. Pump Internals
Reference Drawings SD-2537, SD-2538, SO 2613, SD-2775
1. After removing the mechanical seal assembly, if it is necessary to either inspect
or repair the pump internals, remove the pump housing bolts and rear housing
(Item 3).
2. The gears (Items 6, 7) and wear plates (Item 15) are now accessible and can
readily be removed along with the drive and idler $hafts (Items 4, 5) from the
center/front housings (Items 2, 1).
3. The gears can be removed from the shafts by removing one of the retaining rings
and sliding the gears off their respective shafts.
4. Inspect all parts for signs of wear or damage. The maximum diametral clearance
(bearing I.D. - shaft O.D.) that is acceptable is .010 inches. Shafts and bearings
that are scored or worn must be replaced. Gears and wear plates with excessive
wear or scoring must also be replaced.
5. Clean all parts before reassembly.
5.3 REASSEMBLY
A. Pump Internals
It is recommended that an Eco KOPkit be used when repairing a pump. The KOPkit
comes with gears already assembled to the shafts and significantly reduces the repair
time. If a KOPkit is being used proceed to Step 2.
1. Install the drive and idler gear (Items 6, 7) onto their respective shafts (Items 4, 5)
using keys (Items 8, 9) and retaining rings (Items 10, 11). Take care not to scratch
the shafts when installing the rings. Check the ends of the rings for sharp burrs. If a
plastic and metal gear set are being used, the plastic gear is always the idler gear.
2. Install new bearings (Items 12, 13) in both the front and rear housing. Make sure that
bearing lock pins (Item 14) are installed on each bearing.
3. Install (2) new O-rings (Item 16) in the groove on each side of the center housing.
4. Install a pair of wear plates (Item 15) on the front housing. Bring the front and center
housing together with the (2) housing pins (Item 17) installed in their location holes.
5. Install the drive and idler gear shaft assemblies into the center/front housings
assembly.
6. Install a pair of wear plates (Item 15) into the rear housing and assemble the rear
housing to the pump along with (2) more housing pins.
7. Install the 4 housing bolts and nuts and tighten.
B. Single Internal Mechanical Seal (G2, G4, G6, G8)
Reference Drawings SD-2537, SD-2538
1. Prior to installation of new seal, clean seal housing (Item 30) and shaft. Burrs, etc.
on shaft may damage the TFE wedge when passing over the shaft.
2. Lightly coat seal head face and I.D. with oil or TFE spray and carefully slip over shaft
and into seal housing with the face end out.
3. If using a refurbished seal seat (Item 55), install new TFE )-ring (Item 55A) and pass
over shaft, pushing seal head (Item 60) in front of it until inboard side of O-ring
groove in seal seat (Item 55) comes flush with end of seal housing (Item 30)
4. Carefully tighten seal head set screws through pipe plug port in seal housing, taking
up on each gradually while rotating shaft.
5. Reinstall gland nut (Item 36) and tighten, thereby compressing seal seat surface
against spring loaded seal face.
6. Tighten gland nut and gland lock nut (Item 35).
C. Single Internal Mechanical Seal (GH8, GA12, GA16)

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Reference Drawing SD-2613, SD-2775
1. Before replacing seat assembly, lubricate seal ring with lightweight machine oil or
other lubricant compatible with pumped fluid. Then carefully align slot in seal seat
(Item 55) with seat retainer pin. Place protective material over polished seal seat
surface and press seal seat into seat retainer (Item 36).
2. To reassemble, install seal head (Item 60) on drive shaft and remove holding clips.
Adjust seal head so that seal face is approximately 145 inches back from the front
surface of the front housing on GA12/16 models. On GH8 model center set screw on
seal head in pipe plug port.
3. Tighten seal head set screws through tapped port. Replace pipe plug (Item 62 or 63).
4. Assemble seat retainer (Item 36) with seal seat installed and a new seat retainer O-
ring (Item 55A) over drive shaft (Item 4).
5. Tighten seat retainer bolts (Item 39A) which will set proper compression on seal
head.
D. Single External Mechanical Seal (G2, G4, G6, G8)
Reference Drawing SD-2537, SD-2538
1. Prior to installation of either refurbished or new seal parts, clean housing and shaft.
Remove any buns or buildup which could damage TFE wedge. Make sure there are
no sharp edges on end of shaft or on shaft flat.
2. If using refurbished seal seat install with a new TFE O-ring, and slide over shaft into
the front housing (Item 1) with the lapped side facing out.
3. Screw on gland nut (Item 36) to position seat and tighten.
4. Tighten gland lock nut (Item 35)
5. Lightly coat seal head face and I.D. with oil or TFE spray. Carefully and gently, push
seal head over shaft, taking care not to damage TFE wedge or seal face.
6. Pull shaft away from pump as far as built-in end play will allow it, then fully compress
seal head face against seal seat, and then back off seal head until 1/32" of seal face
becomes visible. Tighten seal head set screws securely.
E. Double Mechanical Seal (G2, G4, G6, G8)
Reference Drawing SD-2537, SD-2538
1. Install new seal housing gasket (Item 31), screwing it down the front housing hub
until it meets the lock nut.
2. Install new or refurbished pump end seal seat (Item 56) with new O-ring. Slide seal
seat over shaft until O-ring is still visible and has not yet entered front housing (Item
1).
3. For G2 and G4 pumps, replace seal housing (Item 30) and install new or refurbished
seal head (Item 60), making sure set screws are backed out and will not mar shaft.
Do not tighten set screws.
4. For G6 and G8 pumps, install new seal head as above, but prior to replacing seal
housing (Item 30), push seal head against pump end seal seat (Item 56)
compressing seal face as far as it will go. Tighten seal head set screws.
5. Screw seal housing tightly on pump hub, compressing O-ring and locking pump end
seal seat firmly in place.
6. Push seal housing gasket (Item 31) up against recessed bore in seal housing and
tighten lock nut (Item 32).
7. Install new or refurbished drive end seal seat (Item 55) with new seat O-ring.
8. Screw on gland nut (Item 36) and tighten firmly compressing seat O-ring and locking
drive end seal seat in place. Tighten gland lock nut (Item 35).
9. With G2 and G4 pumps, center seal head setscrews with seal housing port and
tighten set screws.
10. Reinstall flush connections.

14
IT IS RECOMMENDED THAT SEAL BE TESTED AT THIS POINT BY PRESSURIZING
SEAL HOUSING WITH SUITABLE FLUID AT 10-15 PS1 ABOVE PUMP DISCHARGE
PRESSURE ROTATE SHAFT BY HAND AND OBSERVE FOR ANY LEAKAGE
ALONG THE SHAFT IN EITHER DIRECTION. IF LEAKAGE RATE IS SMALL
SOMETIMES A RUN IN PERIOD OF 5-20 MINUTES WILL CAUSE EVERYTHING TO
SEAT PROPERLY
F. Double Mechanical Seal (GH8, GA12, GA16)
Reference Drawing SD-2613, SD-2775
1. Before replacing seat, lightly lubricate seat ring. Then carefully align slot in seal seat
with pump end seat pin. Place protective material over polished seal seat surface and
press seal seat into front housing (Item 1).
2. Reassemble front housing to pump. Replacement of housing O-ring (Item 16) is
recommended. Install seal head on drive shaft (Item 4). Remove holding clips. Adjust
seal head so that contact is made with pump end seal seat. Assembly seat retainer
with drive end seal seat, previously installed and a seat retainer O-ring (Item 37).
Tighten seat retainer bolts (Item 39A) which will set proper compression on seal
head.
3. Tighten seal head set screws through port. Replace pipe plug (Item 62 or 63) and
previous piping for flushing of double seal.
4. Test seal installation before returning pump to service. Using flush connections in
front housing, pressurize the seal cavity in the front housing at 10-15 psi above pump
discharge pressure. To be sure components are seated properly, rotate shaft by
hand several times. Remove front drive bearing flush plug to observe pump end of
shaft. Observe shaft and gland at coupling end. There should be zero leakage from
either end.
5.4 BOLT-ON THERMAL JACKETS INSTALLATION
The following tools are required:
•Suitable wrenches (open end socket or adjustable) to bolt jacket halves together with
1/4", 3/8", or 1/2." Bolts provided with jacket.
•Heat transfer cement (Term on "standard grade:”or equivalent) to fill any slight
clearance between the interior surface of the bolt-on jacket and the exterior surface
of the pump.
•A suitable mason's trowel to apply heat transfer cement to the interior surface of the
jacket.
•Damp paper towels or rags for clean-up.
1. Install Gearchem pump that is to be jacketed in the process line.
2. Visually inspect pump to be jacketed and remove any foreign material (debris,
packing lists, or identification tags) which might come between the inner jacket
surface and the pump.
PUMPS HAVING PAINTED SURFACES REQUIRE NO SPECIAL PREPARATION.
PAINT SHOULD BE DRY.
3. Check for proper fit of the bolt-on jacket halves by removing bolts which hold the
halves together, and place both halves around the pump. Normally there is a slight
clearance between the inner jacket surface and the pump.
4. Remove jacket halves from the pump and lay them on a clean, dry, work area, inner
surfaces face up.
5. With a trowel, coat the inner surfaces of the jacket halves with heat transfer cement.
Coating should be approximately 1/8" to 1/4" thick. Also dab a small quantity of the
cement on the back of the pump flanges in three or four places.

15
6. Place jacket halves with heat transfer cement on pump and press firmly in place. Bolt
jacket halves together with jacket bolts removed in Step 3.
7. Tighten bolts alternately to assure snug, even seating of the jacket halves on the
pump.
AS BOLTS ARE TIGHTENED ALTERNATELY EXCESS HEAT TRANSFER CEMENT
WILL EXTRUDE FROM EDGES OF THE JACKETS AND AT FLANGE INTERFACES.
REMOVE THIS EXCESS CEMENT WITH TROWEL.
8. Use damp rags or paper towels to clean any excess heat transfer cement from the
installation. Make sure there is no heat transfer cement on the threads of the valve
stems.
9. Allow heat transfer cement to dry for 24 hours (above 32˚F) before applying heating
medium to the bolt-on jacket
5.5 REMOVAL
The following tools are required:
•Rubber or plastic mallet to dislodge jacket halves form heat transfer cement and
pump.
•Suitable wrenches (open-end, socket or adjustable) to remove bolts holding jacket
halves on pump.
•A hand chisel to remove any chunks of heat transfer cement that adhered to the
inner surfaces of the bolt-on jacket.
1. Tum off heating medium supply and allow jacket/pump to cool to ambient
temperature. Remove heating medium jump overs from jacket halves with suitable
wrenches.
IF JACKET HALVES ARE BEING REMOVED TO REPAIR THE PUMP OR REPLACE
IT WITH AN IDENTICAL COMPONENT AND FLEXIBLE METAL HOSES ARE USED
AS JUMPOVERS, IT IS NORMALLY UNNECESSARY TO REMOVE THE
JUMPOVERS. WORK ON THE PUMP CAN PROCEED WITH THE JACKET HALVES
DISLODGED FROM THE PUMP WHILE THE HEATING MEDIUM JUMPOVERS
REMAIN CONNECTED TO THE DRAIN AND SUPPLY COUPLINGS.
2. Remove bolts holding jacket halves on the pump. Tap the jacket halves lightly with a
rubber or plastic mallet to dislodge them from the pump.
JACKET HALVES MAY BE PRIED APART WITH A SCREWDRIVER OR HAND
CHISEL, BUT THIS SHOULD BE DONE VERY CAREFULLY WITH ONLY NOMINAL
FORCE.
3. In most instances, the heat transfer cement adheres to the pump and not the inner
surfaces of the jacket. The cement can be easily chipped away from the pump
surface with a hand chisel. Any chunks of the heat transfer cement adjoining to the
inner surface of the jacket halves should be removed also. Residual traces of heat
transfer cement on the inner surfaces of the jacket halves need not be removed.
These traces neither affect a good fit nor inhibit good thermal performance.
4. When inside surfaces of jacket halves are clean, the jacket is ready for re-use. If the
gear pump is to be repaired and reused, be sure to remove heat transfer cement
adhering to its surface before reinstalling the ECO bolt-on jacket.

16
For additional information or to locate the Pulsafeeder Representative in your area,
you can log onto www.pulsa.com and select “Find a Rep or Distributor”. If
additional assistance is needed, you can call Pulsafeeder at 585-292-8000.
6. TROUBLESHOOTING
DIFFICULTY
PROBABLE CAUSE
REMEDY
No liquid
delivery
Pump not primed
Suction and/or discharge valve closed
Wrong direction or rotation
Suction plugged
Air leak in suction
Suction lift too high
Motor incorrectly wired
Prime pump
Open valves
Reverse rotation
Eliminate plug
Locate and repair leak
Do not exceed vapor pressure
Check wiring diagram
Low liquid
delivery
Discharge pressure higher than expected
Air leak in suction
Rotational speed incorrect
Pump worn or damaged internal parts
Reduce pressure
Locate and repair leak
Check speed and wiring
Inspect and repair as required
Pump
gradually
loses prime
Air leak in suction
Suction lift too high
Air or gas in liquid
Pump worn or damaged
Locate and repair leak
Increase suction pressure
Eliminate air or gas
Install (or clean) strainer in inlet pipe
Pump noisy
Pump cavitating
Pump worn or damaged
Air or gas in liquid
Foreign particles in liquid
Increase suction pressure to provide
sufficient NPSH
Inspect and repair as required
Eliminate air or gas
Install (or clean) strainer in inlet pipe
Motor runs
hot or
overloads
It is normal for motors to feel hot even when
not overloading
Discharge pressure too high
Liquid viscosity higher than expected
Rotational speed too high
Binding internal pump parts
Motor wired incorrectly
Check motor amp draw to be sure
Lower pressure, check pressure relief
valve setting and for defective discharge
pressure gauge
Thin liquid or install larger motor
Reduce speed
Inspect andcorrect condition
Check wiring diagram
Seal leaks
Operatedpumpdry(starvedsuction,dryprime)
Solids in product
Material incompatibility with product
Viscosity
Open valves and prime pump
Add strainer in suction piping (100 mesh)
Consult Factory
Consult Factory

17
7. TORQUE CHART
** Start with hand tightening and then tighten up to recommended Torque valve. **
Pump Model
Bolt Position
Bolt size
Recommended
Torque in-lbs. (Nm).
G2
GA2
Rear Housing Bolts
10x32
30 (3.4)
Gland Nut Bolts
1/4x20
60 (6.8)
GC2
Rear Housing Bolts
10x32
30 (3.4)
Gland Nut Bolts
1/4x20
60 (6.8)
Motor Adaptor Bolt
3/8x16
120 (13.5)
G4
GA4
Rear Housing Bolts
10x32
30 (3.4)
Gland Nut Bolts
1/4x20
60 (6.8)
GC4
Rear Housing Bolts
10x32
30 (3.4)
Gland Nut Bolts
1/4x20
60 (6.8)
Motor Adaptor Bolt
3/8x16
120 (13.5)
G6
GA6
Rear Housing Bolts
1/4x28
60 (6.8)
Gland Nut Bolts
1/4x20
60 (6.8)
GC6
Rear Housing Bolts
1/4x28
60 (6.8)
Gland Nut Bolts
1/4x20
60 (6.8)
Motor Adaptor Bolt
3/8x16
120 (13.5)
G8
GA8
Rear Housing Bolts
1/4x28
60 (6.8)
Gland Nut Bolts
1/4x20
60 (6.8)
GC8
Rear Housing Bolts
1/4x28
60 (6.8)
Gland Nut Bolts
1/4x20
60 (6.8)
Motor Adaptor Bolt
3/8x16
120 (13.5)
GH6
Rear Housing Bolts
1/4x28
60 (6.8)
Gland Nut Bolts
1/4x20
60 (6.8)
GH8
Rear Housing Bolts
1/4x28
60 (6.8)
Gland Nut Bolts
1/4x20
60 (6.8)
G12
Rear Housing Bolts
5/16x18
132 (14.9)
Gland Nut Bolts
5/16x18
132 (14.9)
G16
Rear Housing Bolts
5/16x18
132 (14.9)
Gland Nut Bolts
5/16x18
132 (14.9)

18
8. PUMP SPECIFICATION CHART

19
9. EXPLODED VIEW DRAWING –G2 & G4
SERIES

20
10. EXPLODED VIEW DRAWING –G6 & G8
SERIES