Ampco Pumps Company ZP3 6 Manual

Ampco ZP3 Series
 Positive Displacement Pumps
 Installation and Maintenance Manual
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15

Table of Contents Ampco Pumps Company
Page 2 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Introduction ..............................................................................................................................3
Introduction ....................................................................................................................3
General Information .......................................................................................................3
Shipping Damage or Loss ..............................................................................................3
Receiving/Safety .......................................................................................................................4
Pump Receiving .............................................................................................................4
Safety..............................................................................................................................4
Pump Information....................................................................................................................5
Pump Information ..........................................................................................................5
Label Information...........................................................................................................6
Installation ................................................................................................................................7
Installation......................................................................................................................7
Base Arrangement..........................................................................................................7
Piping and Connections..................................................................................................8
Check/ Isolation/ Relief Valves......................................................................................9
Strainers and Gauges......................................................................................................10
Base Alignment..............................................................................................................10
Pump Rotation................................................................................................................11
Seal Flush .......................................................................................................................11
Maintenance..............................................................................................................................12
Maintenance ...................................................................................................................12
Pump Lubrication...........................................................................................................12
Preventive Maintenance/ Inspection ..............................................................................13
Gear and Bearing Inspection..........................................................................................14
Annual Maintenance ......................................................................................................15
Cleaning .........................................................................................................................15
Pump Disassembly .........................................................................................................16
Single Seal Maintenance ................................................................................................17
Double Seal Maintenance ..............................................................................................20
Disassembly .......................................................................................................20
Assembly............................................................................................................20
Seal Cutaways ................................................................................................................21
Pump Clearances............................................................................................................22
Pump Assembly .............................................................................................................23
Exploded View...............................................................................................................24
Gear Case Maintenance..................................................................................................25
Disassembly .......................................................................................................25
Assembly............................................................................................................27
Ampco Pumps Available Options ...........................................................................................32
Troubleshooting........................................................................................................................33
Remanufacturing Program .....................................................................................................36
ATEX Certification Information ............................................................................................37
Terms and Conditions..............................................................................................................38
Return Policy ............................................................................................................................41

Introduction/Warranty Ampco Pumps Company
Page 3
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Introduction
To ensure the best results and service, please read and fully understand this manual prior to
putting this pump into service. For any questions regarding operation, maintenance, or
installation, please contact your local distributor or Ampco Pumps Company:
Ampco Pumps Company
2045 W. Mill Road
Glendale, WI 53209
Phone: [phone] or [phone]
Fax: [phone]
Email: [e-mail]
General Information
Each Ampco ZP3 pump is fully assembled, lubricated, and tested at the factory and shipped
ready for use. Standard maintenance practices are outlined in this manual. For more
information, please refer to the Maintenance section starting on page 12. Following these
guidelines will provide long-lasting, trouble-free service when the pump(s) is incorporated in a
properly designed system.
If deemed necessary to return a product under warranty, or for any other reason, contact
Ampco Pumps to receive a Returned Material Authorization (RMA) number to allow us to
expedite this request as quickly as possible.
Shipping Damage or Loss
Upon receiving equipment that is damaged or if your shipment is lost in transit, immediately file
a claim with the carrier. At time of pick-up, the carrier signed the bill of lading, acknowledging
that they have received the product from Ampco in good condition.

Receiving/Safety Ampco Pumps Company
Page 4 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
WARNING: Hazards or unsafe practices that COULD result
in severe personal injury or death, and how to avoid them.
CAUTION: Hazards or unsafe practices that COULD result
in minor personal injury or damage to product or property.
Pump Receiving
Ampco covers the pump inlet and discharge ports prior to shipping, ensuring that foreign
matter does not enter the pump during shipment. If the protective covers are missing upon
arrival, remove the pump cover and inspect to ensure it is free from contaminate before turning
the shafts. Please make note of the pump serial number; this will assist in the process of
ordering replacement parts and/or a warranty claim. For more information regarding shipment
damage or warranty, please refer to the Introduction/Warranty section in this manual.
Safety
IMPORTANT: Read and understand this manual BEFORE installation, operation, or
maintenance of the pump. Improper installation, operation, or maintenance may result in
severe injury or death. Equipment damage caused by user neglect will invalidate the pump
warranty.
There are safety symbols used throughout this manual identifying safety concerns.

Pump Information Ampco Pumps Company
Page 5
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Pump Information
The design of the ZP3 pump gear case allows for the shaft location to be universal in order to
fit any system requirement. This can be seen in Figures 1 and 2:
Table 1: Standard Operating Parameters
Figure 1: Shaft Mounts (Upper and Lower)
Figure 2: Shaft Mounts (Right and Left)
Model
Maximum
Nominal
Capacity
Displacement
Maximum
Differential
Pressure
Temperature
Range
Optional
Connection
Size
Maximum
Speed
GPM M3/hr Gal. /
100 rev
Liters /
rev PSI Bar ° F ° C in. mm in. mm Rev/min
ZP3 6 8 1.8 0.8 0.030 300 21
-40° to
200°
-40° to
93°
1.5" 38 1" 25 1000
ZP3 15 11 2.5 1.4 0.052 250 17 1.5" 38 - - 800
ZP3 18 20 4.5 3.0 0.108 200 14 1.5" 38 2" 51 700
ZP3 30 36 8.2 6.0 0.227 250 17 1.5" 38 2" 51 600
ZP3 45 58 13.2 10.0 0.366 450 31 2" 51 - - 600
ZP3 60 90 20.4 15.0 0.568 300 21 2.5” 64 3" 76 600
ZP3 130 150 34.1 25.0 0.946 200 14 3" 76 4" 102 600
ZP3 180 230 52.2 38.0 1.450 450 31 3" 76 - - 600
ZP3 220 310 70.4 52.0 1.980 300 21 4" 102 - - 600
Standard
Connection
Size
6” 152 - - 600
ZP 210 300 68.1 50.0 1.900 500 34 4” 102 - - 600

Pump Information Ampco Pumps Company
Page 6 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Figure 3: Important Label Information
Table 2: Rectangular Flange Model Operating Parameters
 For operating parameters that fall outside the standard values defined in Table 1 and Table
2, please contact the Engineering Department at Ampco Pumps Company (414-643-1852).
 Standard rotors operate within a temperature range of –40 oF to 200 oF. Hot clearance
rotors operate between 180 oF to 300 oF. Consult Ampco Pumps for questions on
application factors such as temperature, operational speed, and differential pressure.
Label Information
WARNING: Labels are installed on the pump at the factory to ensure proper
warning to users. Do not remove these labels; doing so may result in injury.
The pump is installed with simple, but effective labels to help the customer
better understand the ZP3 pump. An identification plate is applied at the factory to help track
the life of the pump. The customer should be aware of the pump’s serial number and model
number prior to contacting Ampco Pumps with any concerns. These labels can be seen below
in Figure 3:
Maximum
Nominal
Capacity
Displacement
Maximum
Differential
Pressure
Temperature
Range
Rectangular
Inlet
(W x L)
Outlet Maximum
Speed
GPM M3/hr Gal. /
100 rev
Liters /
rev PSI Bar ° F ° C inches in. mm Rev/ min
ZP3 34 24.0 5.4 6.0 0.22 250 17
-40° to
200°
-40° to
93°
1.75 x 6.75 2" 50 400
ZP3 64 60.0 13.6 15.0 0.57 300 21 2.24 x 8.82 2½" 65 400
ZP3 134 100.0 22.7 25.0 0.96 200 14 2.97 x 9.25 3" 76 400
ZP3 224 200.0 45.4 52.0 1.97 300 21 3.87 x 11.00 4" 102 400
Model

Installation Ampco Pumps Company
Page 7
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Installation
Follow local codes and restrictions when installing the pump and piping system. The practices
outlined in this manual are intended to ensure the most optimal performance of the pump.
Base Arrangement
The standard installation arrangement for a pump of this type consists of both the pump and
drive unit mounted on the same base plate. Typical base plate arrangements consist of
permanently fixed bases, bases with leveling and/or vibration isolation pads, bases with
attached adjustable legs, or portable/wheeled bases. All base arrangements must be level
during operation. Standard base configurations (base, pump, coupling, coupling guard, gear
reducer, and motor) can be seen below in Figure 4.
Permanently Fixed Leveling/Isolation Pads
Adjustable Legs Portable/Wheeled
Figure 4: Base Layout Examples
WARNING: To ensure safety, protective guards must be properly installed
over all external rotating parts and components. Failure to do so may result in
injury. Ampco Pumps provides protective guards for complete base packages
(pump and drive unit).
Guard

Installation Ampco Pumps Company
Page 8 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Piping and Connections
It is important to minimize forces imposed on the pump. This can be done by independently
supporting the piping going to and from the pump. Excessive force applied to the pump can
cause misalignment of internal parts which leads to the premature wear of rotors, bearings,
and shafts. The use of hangers and pedestals on connecting pipes will help avoid such
misalignment. Examples of such supports can be seen in Figure 5.
Figure 5: Piping Support Example
It is not recommended to weld custom fittings outside the factory. Shrinkage and warpage can
occur to the pump housing which will affect the life and performance of the pump.
To prevent air pockets from entering the pump from the inlet, install the pump below the supply
(Figure 6). This will create a constant supply of product on the suction side, and reduce the
chance for air to enter the pump. Sloping the piping on the inlet side away from the pump will
prevent air pockets if the pump is installed above the supply (Figure 7).
Figure 6: Correct Piping (Supply Above) Figure 7: Correct Piping (Supply Below)

Installation Ampco Pumps Company
Page 9
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Check/ Isolation/ Relief Valves
Check valves should be used on the inlet side for any application when the product is lifted
(Figure 8). This is to ensure a full inlet and is especially important with low-viscosity fluids. If
the system has liquid under a vacuum, such as closed tank applications, it is important to have
a check valve on the discharge side to prevent backflow during initial start-up (Figure 9).
Figure 8: Check Valve (Inlet Side) Figure 9: Check Valve (Discharge Side)
When shut down time is not possible, a bypass system may be installed with a backup pump in
parallel series to allow production to continue while maintenance is performed on the down
pump. Isolation valves may also be used on both the inlet and discharge sides of the pump to
shut down the flow of product to the pump. This will allow for maintenance and removal of the
pump without draining the entire system and risking the loss of product.
CAUTION: Ampco’s ZP positive displacement pumps are designed with
extremely tight tolerances allowing only low slip internally between rotors and
pump housing. DAMAGE will occur if the pump is operated with discharge or
inlet lines closed. DO NOT operate pump with lines closed.
In order to prevent damage to the pump, it is recommended a relief valve be installed on the
pump’s discharge side. The relief valve can either divert flow into a drain or back to the inlet
side (Figure 10).
Figure 10: Relief Valve Examples
Check Valve
Foot Check Valve
Check Valve
Closed Tank

Installation Ampco Pumps Company
Page 10 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Strainers and Gauges
Strainers and magnetic traps should be used to prevent foreign matter from entering the pump.
It is essential to service strainers and traps regularly to prevent restriction of flow. To
determine the performance of the pump, install pressure and vacuum gauges on the inlet and
discharge piping (Figure 11).
Proper Gauging Shows:
 Unusual pressure variations
 Indicates flow
 Changes in pump performance
 Variations in the system
 Differences in fluid viscosities
Figure 11: Proper Gauging
Base Alignment
Pump and base assemblies sent directly from Ampco’s factory are aligned prior to shipment.
Assemblies must be checked once they are installed and prior to operation. Misalignment may
cause unnecessary wear and shorten the life of the pump. If couplings are not specified,
Ampco will use a flexible coupling which permits minor compensation for alignment and
endplay.
To check the coupling alignment, start with checking the angular alignment by measuring the
gaps between the couplings on both the pump and motor side (Figure 12, Angular Alignment).
Shim the assembly accordingly so the gap is equal distance at all points. Next, using a
straight edge, check the horizontal and vertical alignment of the coupling. Place the straight
edge along the coupling to ensure that both sides are concentric (Figure 12, Parallel
Alignment).
Figure 12: Check Alignment
Angular Alignment Parallel Alignment
Straight Edge

Installation Ampco Pumps Company
Page 11
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Pump Rotation
Check the direction of rotation (both on drive unit and pump) prior to connecting the pump to
the drive. This will ensure correct product flow at start-up (Figure 13 and Figure 14). Also
check that the pump turns freely and is free of any foreign contaminates. Connect the pump
and check to make certain all guards are in place.
Figure 13: Top Drive Shaft
Figure 14: Bottom Drive Shaft
Seal Flush
For pumps with double seals, connect seal
flushing before operation. Operation of the
pump without proper flushing will damage seal
faces. Flushing connections are typically 1/8”
female NPT with one side being the inlet and the
other the discharge. Flush from the bottom to
the top, using the lower connection as the inlet
and the upper connection as the discharge. This
ensures that air is removed from the flush line
with the flush area completely flooded (Figure
15). Flush flow rate should be 1/4 GPM (30 psi
max pressure). For high temperature
applications flush flow may be increased to
remove excess heat.
Flush In
Flush Out
Figure 15: Proper Flushing for
ZP3 Double Seal

Maintenance Ampco Pumps Company
Page 12 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Maintenance
WARNING: Before attempting service on the pump or motor, DISCONNECT
the energy source to the pump. This will help prevent accidental start-up and
serious injury.
The Ampco ZP3 pump is designed to be easily disassembled for cleaning and maintenance
purposes. When performing maintenance on the pump it is important to inspect all wetted
parts for standard wear and damage. For inspection instructions please see page 13. For
rebuild information, see PD Pump Remanufacturing Program details on page 36. Prior to
disconnecting the pump, shut off all inlet and discharge valves, drain the pump (rinse if
necessary), and turn off all electrical supply to the pump (follow standard lock out procedures).
Pump Lubrication
Proper lubrication of gears and bearings is vital to the life of the pump. For pumps assembled
on bases with a gear reducer and motor, please refer to the proper manufacturer manual for
lubrication requirements. These manuals are sent with the pump from the factory. Important
lubrication points can be seen in Figure 16.
Figure 16: Lubrication Points
Both gears and bearings are shipped factory-lubricated with grease and oil. The oil used to
lubricate the gears should be changed every 500 hours with the quantities shown in Table 3.
The bearings should be re-greased every 250 hours. Excessive grease may build up inside
the gear case and should be cleaned out through the clean-out plugs shown in Figure 16, A.
Table 3: Oil Capacity (Gears)
A A
Part Qty.
A Clean-out Plugs 4
B Oil Plug (Drain and Fill) 5
C Sight Glass 1
D Grease Fittings 8
B
B
C
D
D
AA
ZP3 Model Top/Bottom Shaft Side Mount
6,15,18 1.3 oz 3.3 oz
30, 34 2.0 oz 4.0 oz
45, 60, 64 6.0 oz 9.5 oz
130, 134 6.0 oz 9.5 oz
180, 220, 224 11 oz 20 oz
210, 320 17 oz 44 oz
Oil Specifications:
ISO Grade 320, SAE 140 or AGMA
Number 6EP
Grease Specifications:
Halo-Guard FG-2, NSF H1 FOOD-
GRADE, NLGI Grade No. 2
*Replacement oil and grease is available from
Ampco

Maintenance Ampco Pumps Company
Page 13
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Preventive Maintenance/Inspection
While performing standard maintenance or cleaning, check for signs of damage or extreme
wear. A simple inspection may show signs of a problem long before it becomes serious.
Detection of such problems can avoid costly repairs and reduce down time. Remove the cover
and inspect the rotor tips to ensure that there is no metal-to-metal contact between the rotors.
Measure the clearance between the rotor tips as seen in Figure 17. The clearance should be
equal on both sides. If contact is detected, rotors may require replacement.
Figure 17: Clearance Between Rotor Tips
Inspect the shaft shoulder and shaft keyway (Figure 18) for wear and replace, if necessary.
Figure 18: Shaft Inspection Points
Inspect the rotor hub and rotor keyway (Figure 19) for wear and replace, if necessary. Rotor
and shaft wear at these locations is caused by extended operation with loose rotor nuts.
Figure 19: Rotor Inspection Points
Clearance should
be equal
Shaft Shoulder
Shaft Keyway
Rotor Keyway
Rotor Hub

Maintenance Ampco Pumps Company
Page 14 Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Gear and Bearing Inspection
While the fluid end is disassembled, feel for gear backlash (movement between the gears) by
rotating either shaft. Once turning has started the other shaft must engage (Figure 20). If gear
backlash is present remove the gear casing cover (drain oil first, see page 16 for disassembly
information) and check for wear around the gear teeth. If evidence of gear teeth wear is
present, replacement is recommended. If gear(s) are loose, check the shaft key and keyway,
either may require replacement.
Figure 20: Check for Gear Backlash
Next, check the condition of the bearings. Do this by applying force in an up and down motion
by hand on both shafts (Figure 21). Also check for any horizontal movement by pushing and
pulling on the shaft. If any movement is felt the bearing may need replacing. If disassembly of
the entire gear case is required, please refer to page 16 for instructions.
Figure 21: Check for Bearing Movement

Maintenance Ampco Pumps Company
Page 15
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Annual Maintenance
It is important to perform an annual maintenance check of the pump in addition to the
preventive maintenance procedures listed on pages 13 and 14. Annual maintenance practices
are as follows:
 Check the gear case bearings by measuring the shaft’s radial movement with a dial
indicator (Figure 22, A). If the movement is greater than or equal to the rotor-to-body
clearance found on page 22 (Table 4) the bearings should be replaced.
 Remove the gear casing cover (See page 16 for disassembly information) and inspect the
gears for wear and damage (Figure 22, B). Also check for backlash and looseness.
 Inspect the rotors for signs of wear and stress cracks around the areas defined in Figure
22, C. Replace, if necessary.
 Check the pump clearances detailed on page 22 to determine pump wear. Pump wear can
be compensated by increasing pump speed.
Figure 22: Annual Maintenance Checks
C
CheckCheck Gears
B
Check Bearings
A
Cleaning
All wetted parts are designed and manufactured to be acceptable by 3A Sanitary Standards.
The body, rotors, and seals can be easily disassembled and cleaned simply by removing the
cover and rotor nuts. Pump disassembly information begins on page 16.
Once the fluid end is disassembled, follow standard practices for cleaning the product being
pumped. If for any reason the rotor o-ring should fail and the internal threads of the rotor nut
become soiled, a soft bristle brush and appropriate cleaning solution should be used to clean
them. Do not use abrasive cleaning tools and chemicals. Wire brushes or pads will physically
damage metal and seal parts. Pump parts should not be exposed to harsh acids for longer
than necessary. Once the parts have been removed from a cleaning solution, rinse the parts
so no residual deposits remain. Acids and cleaning solutions can be harmful. Take necessary
steps to prevent bodily harm.
ZP3 pumps are designed for CIP (clean-in-place) capabilities ensuring that CIP solution
reaches all surfaces inside the pump. The fluid velocity (typically 5 ft/sec) and differential
pressure (30 psi recommended) are critical components of a correct CIP setup. For additional
support, please contact the Engineering Department at Ampco Pumps Company (414-643-
1852).

Ampco Pumps Company
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Pump Disassembly
1) Start by removing the cover nuts with an appropriate wrench (Figure 23). During
disassembly place all parts on a clean, protected surface with finished surfaces and seal faces
facing up. Tap the cover off using a soft mallet. Remove the cover o-ring and inspect it.
2) Loosen each rotor nut using the appropriate size wrench and a non-metallic wedge to keep
the rotors from moving (Figure 24). Unthread each nut and disassemble the nut assembly
(rotor nut, Bellville washer, and retaining o-ring).
Figure 24: Rotor Removal
3) Remove the rotors by orientating them perpendicular to each other and then pulling them
out. It is important to be cautious with the rotors so that they are not damaged in any way. If
rotors are difficult to remove, use a nylon or wood lever to pry them out without damaging the
body or the rotors. Use Figure 25 to ensure that all parts are removed.
Part
1 Rotor Nut Assembly
2 Rotor Nut O-ring
3 ZP3 Rotor
4 Rotating Seal O-ring
5 Rotating Seal
6 Stationary Seal
7 Stationary Seal O-ring
8 Wave Spring
9 Seal Sleeve
Wedge Rotor Nut Assembly
Page 16
Rotor Nut
Bellville Washer
Retaining O-ring
Figure 25: Exploded View Single Mechanical
Figure 23: Removing ZP3 Cover
Maintenance

Maintenance Ampco Pumps Company
Page 17
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Pump Disassembly
Figure 26: Removal of Pump Body
Single Seal Maintenance
1) Start by inserting the wave spring into the sleeve making sure that it sets below the
stationary drive pins (Figure 27). Insert a rotor key in the keyway on the shaft.
2) Slide the stationary seal o-ring into the body hub until it seats against the top of the sleeve
(previously installed). Align the slots on the stationary seal with the pins inside the hub. Press
the stationary seal into the hub until is seats on the spring; there
should be noticeable spring resistance when pushing on the seal.
4) Remove the two body hold down bolts us-
ing the appropriate driver. Pull the pump
body off by sliding it along the studs
(Figure 26). If the body is stuck, use a soft
mallet to tap the body. Inspect the body
for excessive wear, clean, and continue on
to seal maintenance. It is important to re-
assemble the pump body back onto the
original gear case because the shafts are
shimmed for that particular body.
Wave
Spring
Figure 27: Inserting
Figure 28: Stationary Seal Assembly
Align the slot
and pin
Stationary Seal
O-ring

Maintenance Ampco Pumps Company
Single Seal Maintenance
3) Next install the rotating o-ring onto the rotating seal by stretching it (not rolling) onto the
rotating seal (Figure 29).
4) Slide the rotating seal onto the rotor hub (Figure 30) making sure to align the slots on the
seal to the drive pins in the rotor. Press the seal down until it seats inside of the rotor.
5) Slide the rotors onto the shafts until they seat against the shaft shoulder (Figure 31).
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Page 18
Figure 29: Installing the Rotating O-ring
1 2
Figure 30: Inserting Rotating O-ring
Rotating Seal O-ring
Rotating Seal
Align
Figure 31: Rotor Assembly
Shoulder

Page 19
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Maintenance Ampco Pumps Company
Single Seal Maintenance
6) Install the Bellville washers in the rotor nuts in the orientation shown and hold them in place
using the small retaining o-rings (Figure 32). Install a rotor nut o-ring before threading the
nut onto the shaft.
7) Thread the nut onto the shaft and tighten it down using the appropriate wrench and a non-
metallic wedge to hold the rotor in place (Figure 33). Torque the rotor nuts down using 163 N-
m of force. Orientate the rotors as seen in Figure 33 and Always tighten the first rotor
positioned under the overlap of the opposing rotor. Repeat with the second rotor in the same
orientation.
8) Install a new cover o-ring and slide the cover over the studs making sure that the dowels in
the body are aligned with the correct dowel holes in the cover (Figure 34). Visually inspect to
ensure that the cover o-ring remained in place. Turn the cover nuts (clockwise) by hand and
fully tighten them using the appropriate wrench. Tighten the rotor nuts in an opposing manner,
as seen on Figure 34, so that the cover is evenly tightened to the body.
Rotor Nut
Bellville Washer
Retaining O-ring
Figure 32: Rotor Nut Assembly
Rotor Nut O-ring
Figure 33: Rotor Assembly
Overlap
Wedge
Figure 34: Cover Assembly

Maintenance Ampco Pumps Company
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Page 20
Double Seal Maintenance
Disassembly:
Use caution not to damage the seals during removal.
1) Remove the Inner stationary seals from the pump body (Figure 35, item 61).
2) Remove the wave springs and stationary o-rings from the stationary seals.
3) Slide the seal seats from each shaft, and remove the seal seat o-ring from the shaft.
Assembly:
Clean both shaft ends and the body before assembling. Apply a light film of lubricant to NEW
seal seat o-rings and insert them on the shaft’s slot. Slide the seal seat onto the shaft by
pushing it against the shaft shoulder making sure to align the drive flats on seal seat and shaft
(Figure 36).
Figure 36: Aligning Flats
Apply a light film of lubricant to NEW inner stationary o-rings
and install them on the inner stationary seals. Place the inner
wave spring into the body and install the inner stationary seal
into the seal groove (Figure 37). Make sure the seal stop pins
are aligned with the notches on the inner stationary seal. For
double seals, apply a light film of lubricant to NEW outer
stationary o-rings and install them on the outer stationary
seals. Place the outer wave spring into the body and install the
outer stationary seal in the seal groove (Figure 37). Check that
the seal stop pins are aligned with the notches on the outer
stationary seal.
Figure 37: Installing Stationary Seals
Shaft Flats Seal Flats
Double
Mechanical Seal
Figure 35