Fristam Pumps FL2 Series Instructions for use

FL2 SerieS PumP
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INSTRUCTION AND MAINTENANCE MANUAL:
FL2/FL3 Series Pumps (Models: 15, 58, 75, 100 & 130)
SANITARY POSITIVE DISPLACEMENT PUMPS

FriStam PumPS
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DeScription
This manual contains installation, operation, assembly, disassembly and repair instructions for
the Fristam FL2 15, 58, 75, 100 & 130 models rotary pump and the Fristam FL3 versions of
these models.
Fristam FL2 Series bi-wing rotor pumps are positive-displacement pumps with non-contact
rotors.
Fristam’s FL2 Series bi-wing rotor design combines mechanical simplicity with pumping effi-
ciency. The pump’s bi-wing rotor provides easy maintenance, cleanability, gentle product han-
dling and dependability. With nine pump models and a full range of options, you can match
your process needs precisely.
The FL2 Series pump is available with any connection type desired and may be mounted
with the inlet/outlet connections in a horizontal or vertical orientation. The pump should be
coupled to a motor/drive assembly properly specified to give the desired performance for the
required application.
The FL3 Series pump is a version of the FL2, featuring unique helix-shaped tri-wing rotary
lobes, providing increased suction capabilities and virtually eliminating pulsation and reduc-
ing noise.
!
DANGER: BEGIN ALL PUMP MAINTENANCE OPERATIONS BY DISCONNECTING
THE ENERGY SOURCE TO THE PUMP. OBSERVE ALL LOCK OUT/TAG
OUT PROCEDURES AS OUTLINED BY ANSI Z244.1-1982 AND OSHA
1910.147 TO PREVENT ACCIDENTAL START-UP AND INJURY.

FL2 SerieS PumP
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tabLe oF contentS
Description .....................................................................................................2
table of contents ...........................................................................................3
technical information .....................................................................................4
installation .....................................................................................................7
recommenDeD preventive maintenance ............................................................9
seal replacement ............................................................................................10
single seal assembly Drawing.......................................................11
Double seal assembly Drawings ....................................................12
pump enD Disassembly ...................................................................13
aDDitional Disassembly for Double seal only...............................14
seal assembly - Double seal .........................................................15
seal assembly ...............................................................................15
pump enD assembly .......................................................................16
shaft anD/or bearing replacement ..................................................................18
gearbox Disassembly .....................................................................18
gearbox assembly..........................................................................19
fl2 15 anD 58 (single seal) ............................................................................21
fl2 15 part number list ..............................................................21
pump assembly Drawing .................................................................22
fl2 58s part number list............................................................24
fl2 58l part number list............................................................25
fl2/3 75 anD 100............................................................................................26
pump assembly Drawing .................................................................26
fl2 75s part number list............................................................28
fl2/3 75l part number list.........................................................29
fl2 100s part number list..........................................................30
fl2/3 100l part number list.......................................................31
fl2 130 ......................................................................................................32
pump assembly Drawing .................................................................32
fl2 130s part number list..........................................................34
fl2 130l part number list..........................................................35
troubleshooting..............................................................................................36
pump maintenance recorD ...............................................................................37
notice of terms, warranty provisions incluDing
Disclaimers, claims anD limitation of liability ...................................................39

FriStam PumPS
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technicaL inFormation
SpeciFicationS
Maximum Differential Pressure.................................................................... FL2 15 ....145 PSI
......................................................................................................................FL2 58S.....130 PSI
......................................................................................................................FL2 58L.....115 PSI
...............................................................................................FL2 75S, 100S & 130S.....170 PSI
...............................................................................................FL2 75L, 100L & 130L.....120 PSI
.........................................................................................................FL3 75L & 100L.....115 PSI
Maximum Inlet Pressure................................................................................................100 PSI
Temperature Range ................................................................................................ up to 350 °F
(For temperatures over 200°F contact your local distributor or Fristam for special pump requirements).
materiaLS oF conStruction
Primary Product Contact Components ..................................................................... AISI 316L
Cover Gasket.................................................................................................... Viton (standard)
Also Available in ............................................................................................. EPDM
Surface Finish for Product Contact Surfaces................................................ 32 Ra (standard)
ShaFt SeaLS
Seal Types......................................................................................Single & Double Mechanical
Recommended Seal Flush Water Pressure (double seal)............. 1-2 PSI (5PSI maximum)
Recommended Seal Flush Water Flow Rate (double seal)......................................... 3-12 gph
Stationary Seal Ring Material .........................................................................................Carbon
Also Available in ............................................................................... Silicon carbide
Rotating Seal Ring Material ............................................. Chrome oxide coated stainless steel
Also Available in ............................................................................... Silicon carbide
O-ring Material ................................................................................................Viton (standard)
Also Available in ................................................EPDM and other options available
Lubrication
Oil Grade.................................................................................................................. SAE 15W40
Oil Capacity - Horizontal
Model 15....................................................................................0.15 liters (0.04 US gallons)
Model 58...................................................................................0.25 liters (0.07 US gallons)
Model 75...................................................................................0.60 liters (0.16 US gallons)
Model 100.................................................................................1.80 liters (0.48 US gallons)
Model 130................................................................................ 2.00 liters (0.53 US gallons)
Oil Capacity - Vertical
Model 15...................................................................................0.15 liters (0.04 US gallons)
Model 58...................................................................................0.25 liters (0.07 US gallons)
Model 75...................................................................................0.50 liters (0.13 US gallons)
Model 100.................................................................................1.30 liters (0.34 US gallons)
Model 130.................................................................................1.80 liters (0.48 US gallons)

FL2 SerieS PumP
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Figure 19
tabLe a1: WooDS Sure-FLex coupLing aLignment
tabLe A2: recommenDeD torque vaLueS:
Cover/housing Rotor nut Rotor Nut Bearing Lock Nut
nuts (standard) (flat cover) rolling torque
15 5 ft-lbs. n/a 5 ft-lbs. (M8)
58L & S 15 ft-lbs. 50 ft-lbs. 5 ft-lbs. (M8) 3 in-lbs.
75L & S 30 ft-lbs. 80 ft-lbs. 10 ft-lbs. (M10) 4 in-lbs.
100L & S 45 ft-lbs. 130 ft-lbs. n/a 9 in-lbs.
130 L & S 80 ft-lbs. 180 ft-lbs. n/a 27 in-lbs.
Sleeve
Size
Type E Type H
Parallel
A
Angular
Y max. - Y min. Y* Parallel A
Angular
Y max. - Y min. Y*
6 .015 .070 2.375 .010 .016 2.375
7 .020 .081 2.563 .012 .020 2.563
8 .020 .094 2.938 .015 .025 2.938
9 .025 .109 3.500 .017 .028 3.500
10 .025 .128 4.063 .020 .032 4.063
11 .032 .151 4.875 .022 .037 4.875
12 .032 .175 5.688 .025 .042 5.688
13 .040 .195 6.688 .030 .050 6.625
14 .045 .242 7.750 .035 .060 7.750
Dimensions are in inches.
*The "Y" dimension is shown for reference.
*The “Y” dimension is shown for reference.
tabLe A4: maximum SpeeD
FL2 15 1800 RPM
FL2 58L & S 1000 RPM
FL2 75L & S 800 RPM
FL2 100L & S 600 RPM
FL2 130 L & S 600 RPM
FL3 75-100 1000 RPM

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tabLe a3: rotor cLearanceS in miLLimeterS (reFerS to Figure 19)
STANDARD FL2/3 ROTOR CLEARANCES
Model Back Face Front Face Radial Sides Radial Top
& Bottom
Rotor to
Rotor
15 0.06-0.08
(0.0024”-0.0031”)
0.07-0.15
(0.0028”-0.0057”)
0.09-0.12
(0.0036”-0.0046”)
0.07-0.10
(0.0028”-0.0039”)
0.07-0.12
(0.0028”-0.0047”)
58S 0.1-0.13
(0.0039”-0.0051”)
0.14-0.23
(0.0055”-0.009”)
0.175-0.205
(0.0069”-0.0081”)
0.115-0.145
(0.0045”-0.0057”)
0.12-0.16
(0.0047”-0.0063”)
58L
75S
0.14-0.17
(0.0055”-0.0067”)
0.20-0.29
(0.008”-0.011”)
0.264-0.294
(0.010”-0.012”)
0.14-0.20
(0.0055”-0.008”)
0.125-0.185
(0.005”-0.007”)
75L 0.325-0.358
(0.013”-0.014”)
0.19-0.25
(0.0075”-0.010”)
0.175-0.235
(0.0069”-0.009”)
75L
(FL3)
0.14-0.17
(0.0055”-0.0067”)
0.35-0.39
(0.014”-0.015”)
0.22-0.30
(0.009”-0.012”)
100S
0.19-0.23
(0.0075”-0.009”)
0.23-0.33
(0.008”-0.0011”)
0.4-0.446
(0.016”-0.018”)
0.18-0.34
(0.007”-0.013”)
0.19-0.265
(0.0075”-0.010”)
100L 0.485-0.531
(0.019”-0.021”)
0.26-0.43
(0.010”-0.017”)
0.275-0.35
(0.011”-0.014”)
100L
(FL3)
0.20-0.22
(0.008”-0.009”)
0.50-0.56
(0.020”-0.022”)
0.33-0.41
(0.013”-0.016”)
130S 0.19-0.23
(0.0075”-0.009”)
0.23-0.33
(0.009”-0.013”)
0.46-0.53
(0.018”-0.021”)
0.26-0.35
(0.010”-0.014”)
0.26-0.34
(0.010”-0.013”)
130L 0.21-0.25
(0.008”-0.010”)
0.32-0.42
(0.0125”-0.0165”)
0.55-0.62
(0.022”-0.024”)
0.35-0.44
(0.014”-0.0175”)
0.35-0.43
(0.014”-0.017”)
HIGH TEMPERATURE FL2/3 ROTOR CLEARANCES
Model Back Face Front Face Radial Sides Radial Top
& Bottom
Rotor to
Rotor
15 0.07-0.09
(0.0028”-0.0035”)
0.085-0.165
(0.0033”-0.0065”)
0.13-0.16
(0.005”-0.006”)
0.11-0.14
(0.0043”-0.0055”)
0.11-0.16
(0.0043”-0.0063”)
58S 0.12-0.20
(0.0047”-0.008”)
0.15-0.28
(0.006”-0.011”)
0.215-0.245
(0.0085”-0.0096”)
0.16-0.19
(0.006”-0.007”)
0.16-0.2
(0.0063”-0.008”)
58L
75S
0.16-0.25
(0.0063”-0.010”)
0.2-0.35
(0.008”-0.014”)
0.3-0.33
(0.012”-0.013”)
0.18-0.24
(0.007”-0.009”)
0.16-0.22
(0.0064”-0.009”)
75L 0.35-0.38
(0.014”-0.015”)
0.22-0.28
(0.009”-0.011”)
0.2-0.26
(0.008”-0.010”)
75L
(FL3)
0.22-0.24
(0.0086”-0.0094”)
0.35-0.39
(0.014”-0.015”)
0.22-0.30
(0.009”-0.012”)
100S
0.27-0.31
(0.011”-0.012”)
0.29-0.39
(0.011”-0.015”)
0.43-0.48
(0.017”-0.019”)
0.21-0.37
(0.008”-0.015”)
0.22-0.30
(0.009”-0.012”)
100L 0.52-0.56
(0.020”-0.022”)
0.29-0.46
(0.011”-0.018”)
0.31-0.38
(0.012”-0.015”)
100L
(FL3)
0.29-0.31
(0.011”-0.012”)
0.50-0.56
(0.020”-0.022”)
0.33-0.41
(0.013”-0.016”)
130S 0.29-0.31
(0.011”-0.012”)
0.30-0.38
(0.012”-0.015”)
0.50-0.55
(0.020”-0.022”)
130L 0.33-0.35
(0.013”-0.014”)
0.58-0.64
(0.023”-0.025”)
0.38-0.46
(0.015”-0.018”)

FL2 SerieS PumP
7
inStaLLation
unpacking
Check the contents and all wrapping when unpacking the pump. Carefully inspect for any
damage that may have occurred during shipping. Immediately report any damage to the car-
rier. Leave the protective caps over the pump inlet and outlet connections until you are ready
to install the pump.
inStaLLing
Prior to actually installing the pump, ensure that:
• the pump will be readily accessible for maintenance, inspection and cleaning.
• adequate ventilation is provided for motor cooling.
• the drive and motor type is suitable for the environment where it is to be operated. Pumps
intended for use in hazardous environments e.g., explosive, corrosive, etc., must use a motor
and drive with the appropriate enclosure characteristics. Failure to use an appropriate mo-
tor type may result in serious damage and/or injury.
piping
Follow good piping practices when installing your FL
Series pump:
•Support all piping independently to minimize the
forces exerted on the pump (Figure 1).
•Ensure that the piping can accommodate thermal
expansion without stressing the pump.
•Slope inlet piping up to pump to avoid air pockets
or if suction piping is larger than the pump inlet, use
an eccentric reducer, straight side up, to prevent air
pockets from forming. (Figure 2).
•Install a relief valve on the discharge side of the pump
with a bypass loop back to the suction side to ensure
that the pump cannot be over-pressurized.
•Use a check or “foot” valve on the inlet side of the
pump in lift applications to keep the suction piping
flooded.
aLignment
In most cases, the pump will be shipped with a drive unit mounted on a common baseplate.
The drive and pump are aligned at the factory; however, this alignment should be checked after
installation (Figure 3). Misalignment between the pump and drive can result in premature
bearing failure or other damage. If the pump is not shipped with a drive unit, use a flexible
coupling between the pump and drive unit. Align the pump and drive unit according to the
coupling requirements.
Figure 1
Figure 2

FriStam PumPS
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checking aLignment
Remove the wire ring from the coupling sleeve and let it
hang between the sleeve and one of the flanges.
To check the parallel alignment place a straight edge
across the two coupling flanges and measure the maxi-
mum offset at various points around the periphery of the
coupling without rotating the coupling. If the maximum
offset exceeds the figure shown under “Parallel” in Table
A1 (page 5), realign the shafts.
Check the angular alignment with a micrometer or cali-
per. Measure from the outside of one flange to the out-
side of the other (“Y”) at intervals around the periphery
of the coupling. Determine the maximum and minimum
dimensions without rotating the coupling. The difference
between the maximum and minimum must not exceed
the figure given under “Angular” in Table A1 (page 5). If
a correction is necessary, be sure to recheck the parallel
alignment.
Replace the wire ring on the O.D. of the coupling sleeve.
eLectricaL connectionS
Have an electrician connect the drive motor using sound electrical practices. Ensure that
proper motor overload protection is provided. The size of the drive selected should meet the
requirements of the operating conditions. A change in conditions (for example, higher viscos-
ity product, higher product specific gravity, lower head losses) can overload the motor. For
technical assistance regarding operating condition changes, please contact Fristam Pumps.
Make sure that the pump is rotating in the correct direction.
Water FLuSh connectionS
If your pump is equipped
with a double mechanical
seal, water must be supplied
to provide cooling and lubri-
cation. Connect supply and
return lines to the water pipes
supplied with product seal
on your pump. See Figure 4
for the proper orientation.
Use about 3-12 gallons (11-45
lph) per hour of water at 1-2
psi (0.07 - 0.14 bar). Note:
maximum pressure = 5psi.
Excessive seal pressure and/or
flow rate through the product
seal cavity may cause increased seal wear and shorten seal life.
Figure 3
Figure 4

FL2 SerieS PumP
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Start-up check-LiSt
1. Make sure that the pump and piping system are clear of any foreign matter. Do not use the
pump to flush the system.
2. Make sure that the pump and drive are properly lubricated. Check the lubrication section
(page 4) in this manual for the pump. See instructions from the drive manufacturer for the
drive.
3. Check to make sure that all guards are in place and secure.
4. Check for proper pump and drive rotation. Make sure that the pump is flooded with product
when checking the rotation. Running the pump dry even momentarily can cause seal damage.
5. Check that all valves on the discharge side are open to prevent over-pressurizing the pump.
Do not rotate the shafts with the cover removed. Rotors and housing could be damaged.
cLeaning recommenDationS
When you are running products or cleaning solutions with different temperatures, you need
to allow enough time for all of the wetted components inside the pump to reach a steady-state
temperature before you start the pump. If your process does not allow you to stop the pump
during this transition, you need to install rotors that provide larger clearances. Please contact
your Fristam representative for assistance.
If the process lines are to be cleaned with the pump, use a by-pass loop around the FL2 pump
during the CIP mode to maintain pip velocity. Once the wetted components are at a steady
temperature, the pump can be started and run around 100 RPM with a backpressure of at least
10 PSI. As the product viscosity increases, the required backpressure may need to be increased
as well.
Contact Fristam if you have any questions.
recommenDeD preventive maintenance
recommenDeD torque vaLueS
Table A2, page 5.
recommenDeD SeaL maintenance
Visually inspect the mechanical seal regularly for leakage.
Annually replace the mechanical seal under normal conditions.
Replace the mechanical seal as often as required under severe conditions (abrasive product,
dry running, etc.).
eLaStomer inSpection
Inspect all elastomers when performing pump maintenance. We recommend replacing elasto-
mers (o-rings and gaskets) during mechanical seal replacements.
Model 15: If the rotor bolt o-ring, rotor washer o-ring, or rotor o-ring fails, the threaded hole
on the end of the shaft and the rotor bolt threads will need to be cleaned. We recommend
removing the rotors and rotor bolts/washers while the pump is being CIP’d. This will ensure
that the internal threads are cleaned before production resumes. We recommend cleaning the
external threads on the rotor bolt with a wire brush.

FriStam PumPS
10
Models 58-130: If the rotor nut gasket fails, the threaded hole on the rotor nut and the threads
on the end of the shaft will need to be cleaned. A wire brush is recommended for cleaning
these threads.
Lubrication
Gearbox - The oil level should be maintained in the center of the sight glass on the side of the
gearbox housing. The oil should be changed every 4000 hours under normal conditions and
every 2000 hours under severe conditions. See the oil capacity listing in the front.
Elastomers - Use a food grade lubricant on o-rings and gaskets unless otherwise specified. If
using EPDM o-rings or gaskets, an oil-based lubricant can’t be used.
perioDic maintenance
Periodically inspect the pump housing, cover and rotors for any signs of wear or damage. If
wear is present this could be a sign of over pressurization, incorrect rotor gap or bearing wear.
SeaL repLacement
Begin all pump maintenance by disconnecting the energy source to the pump.
Observe all lock out/tag out procedures as outlined by ANSI Z244.1-1982 and
OSHA 1910.147 to prevent accidental start-up and injury.
tooLS requireD For SeaL repLacement:
15: 10 mm wrench 100L & S: 19 mm wrench
5 mm Allen wrench 41 mm socket
Flat cover rotor bolt tool 6 mm Allen wrench
(included w/pump)
1” socket for flat cover tool
58L & S: 13 mm wrench 130 L & S: 24 mm wrench
24 mm socket 50 mm socket
6 mm Allen wrench
Flat cover rotor bolt tool
(included w/pump)
1” socket for flat cover tool
75L & S: 17 mm wrench All Models: Torque wrench
30 mm socket 1/2” dowel
5 mm Allen wrench Soft-faced hammer
Flat cover rotor bolt tool Small flat blade screwdriver
(included w/pump) Feeler gauges
1” socket for flat cover tool
!

FL2 SerieS PumP
11
Figure 8-B: FL2/3 15 - 130 Single seal assembly
1265000528 Rev A
DESCRIPTION
16
3*
18
13
33
14
5
12*
GAPPING SPACER
ROTATING SEAL
GAPPING SPACER O-RING
STATIONARY SEAL O-RING
SEAL WAVE SPRING
STATIONARY SEAL
ROTOR O-RING
ROTOR NUT O-RING
5
14
512* 3313 183*16
12* 18
33
13
16
3* 14
*PARTS NOT INCLUDED IN FLII 15 PUMPS PRIOR TO MARCH 2009

FriStam PumPS
12
Figure 12: FL2 130 Double seal assembly
Figure 12-B: FL2/3 58 - 100 Double seal assembly
1265000529
Rev B
5
*PARTS NOT INCLUDED IN FLII 15 PUMPS PRIOR TO MARCH 2009
32
16
3*
13
12*
21 REAR STATIONARY SEAL O-RING
WATER PIPE
SEAL FLUSH HOUSING O-RING
34
32
GAPPING SPACER
FRONT SEAL SPRING
FRONT STATIONARY SEAL
GAPPING SPACER O-RING
REAR SEAL SPRING
REAR STATIONARY SEAL
ROTATING SEAL
14
20
19
18
33
16
3*
18
14
33 37
21
19
20
ROTOR O-RING
FRONT STATIONARY SEAL O-RING
ROTOR NUT O-RING
DESCRIPTION
12*
13
5
12*5 3* 16 13 33 14 18 20 19 21 32 37
SEAL FLUSH HOUSING
37
34
211920181433131635 12
FRONT STATIONARY SEAL O-RING
DESCRIPTION
32 SEAL FLUSH HOUSING O-RING
SEAL FLUSH HOUSING
37
REAR SEAL SPRING
REAR STATIONARY SEAL
REAR STATIONARY SEAL O-RING
ROTATING SEAL
18
20
19
21
FRONT STATIONARY SEAL
GAPPING SPACER O-RING
33 FRONT SEAL SPRING
14
GAPPING SPACER
ROTOR O-RING
13
16
3
12
32 37
5 12 13 33 3 14 16 37 20
18 32 19 21
ROTOR NUT O-RING
5
34
WATER PIPE
34
1265000316
Rev B

FL2 SerieS PumP
13
pump enD DiSaSSembLy
Drain all product from the pump head prior to disassembly. The pump
head may be isolated with inlet and outlet valves. Disconnect the suction
and discharge piping from the pump. Disconnect the seal flush supply
and return lines to your pump if the pump is
equipped with a double mechanical seal.
a) Loosen and remove the four cover dome nuts
from the cover.
b) Next remove the cover. If it is stuck, tap on
the cover with a soft-faced hammer (Figure 5).
c) Remove the cover o-ring.
d) To remove the rotors, first loosen the first
rotor, place the dowel between the rotors to
prevent rotation as shown in Figure 6.
FL3 Only: Secure the drive shaft with a chain wrench to prevent rotation.
e) Turn the first rotor nut counter-clockwise
(models 15-75 require a Flat Cover Rotor
Bolt Tool).
f) Remove the rotor nut and o-ring.
g) To loosen the other rotor, place the dowel
between the rotors on the opposite side of
the pump (FL2 only). Again turn the rotor
nut counter-clockwise.
h) Remove the rotor nut and o-ring.
i) The rotors and rotor o-rings can now be
removed from the pump housing by pulling
straight. Handle the rotors with care to avoid
damage. While removing the rotors watch for the stamped markings. There should be one
dot on the rotor for the drive shaft and two dots on the rotor for the idle shaft.
FL3 Only: Both rotors must be removed at the same time.
remove the mechanicaL SeaL
a) Remove the two housing nuts securing the
pump housing to the gearbox.
b) Slide the pump housing away from the
gearbox. If the housing is stuck, alternately
tap on the inlet and outlet ports with a soft-
faced hammer (Figure 7). Note: the gapping
spacers and the rotating seals will come off
with the pump housing (except for the FL2
15).
c) Clean and examine all of the pump compo-
nents for damage. Replace damaged com-
! Warning
Figure 5
Figure 6
Figure 7

FriStam PumPS
14
ponents as required. Fristam recommends replacing all of the
wetted elastomers during reassembly.
d) Pull the rotating seals off the gapping spacers and remove
both from the pump housing.
e) Place the pump housing face up on a bench and rest it on the
housing studs.
f) Place your thumbs on the ID of the front stationary seals and
push downward to press the stationary seals out of the pump
housing (Figure 9).
g) The front seal springs will come out with the stationary seals.
h) Turn the pump housing over. Use a small flat blade screw-
driver to remove the front stationary seal o-rings from the
grooves in the pump housing (Figure 10).
i) Discard the o-rings.
j) Remove the gapping spacer o-rings from the grooves in
the gapping spacers and discard.
aDDitionaL DiSaSSembLy For DoubLe SeaL onLy
For pumps with double mechanical seals, you now have to
remove the rear stationary seals.
a) Remove the seal housing o-ring from the front of the seal
flush housing.
FL2 15 only - pull off housing.
b) Loosen the seal housing bolts with the Allen wrench.
c) Place the seal flush housing face down on the bench.
Place your thumbs on the ID of the rear stationary seals
and push downward to press the stationary seals out of the seal flush housing (Figure 11).
d) The rear seal springs and rear stationary seal o-rings will come out with the stationary seals.
You are now ready to begin seal assembly.
Figure 9
Figure 10
Figure 11 for models 15 - 100
PRESS
1265000584 Rev -
Figure 11 for model 130
1265000585 Rev -
PRESS

FL2 SerieS PumP
15
SeaL aSSembLy – For DoubLe SeaL onLy
a) Place the seal flush housing face up
on a bench.
b) Lubricate and install the rear sta-
tionary seal o-ring in the bottom of
the stationary seal cavity.
c) Install the rear stationary seal spring
into the stationary recess.
d) Install the rear stationary seals into
the stationary seal cavity and press
into place. Wipe the face of the sta-
tionary seals to remove any dirt or
oil.
e) Fasten the seal flush housing to the front of the
gearbox.
f) Install the seal flush housing o-ring onto the seal
flush housing.
Finish assembling the seal as outlined in the “Seal As-
sembly” section.
SeaL aSSembLy
Note: when installing the new seal components make
sure that you use all of the components supplied with
thereplacement seal kit. Using some of the old compo-
nents may reduce seal life.
a) With the pump housing lying face down on a table,
lubricate and install the front stationary seal o-ring
in the housing o-ring groove.
b) Place the stationary seal spring into the stationary
seal cavity in the back of the housing (Figure 14).
c) Use your thumbs to install the front stationary seal
into the oval shaped stationary seal cavity in the
back of the housing. Wipe the face of the stationary
seals to remove any dirt or oil.
d) Install the rotating seal onto the pump
shaft (Figure 15). Note: the back of the
rotating seal has a triangular recess that
fits on to the triangular area of the shaft.
Figure 13 Models 58-100 shown
STATIONARY SEAL
O-RING
SPRING
1265000583 Rev -
Figure 14
Figure 15

FriStam PumPS
16
pump enD aSSembLy
a) Install the pump hous-
ing onto the gearbox
and secure the housing
dome nuts.
note: For FL2 15 prior to
march 2009:
b) Install the gapping
spacer and rotor on to
the appropriate shaft.
Install the rotor with
one dot onto the drive
shaft and the rotor with
two dots onto the idle
shaft (Figure 16a).
For aLL other moDeLS:
b) Install the gapping spac-
er o-ring into the o-ring
groove on the gapping
spacer.
• Install the gapping spacer with one dot
onto the drive shaft. Install the gapping
spacer with two dots onto the idle shaft
(Figure 16).
• Install the rotor o-rings into the
grooves on the back of the rotors (Fig-
ure 17).
• Install the rotors, o-ring side first, into
the pump housing. Install the rotor
marked with one dot onto the drive
shaft. Install the rotor with two dots
onto the idle shaft. Note: the dots are
located in the o-ring groove on the
front of the rotor.
FL3: Both rotors must be installed
at the same time.
For aLL moDeLS:
c) Install the rotor nut o-rings into the rotor nut
groove on the front of the rotor.
d) Apply one drop of removable thread lock to the
shaft threads and thread the rotor nuts onto the
shaft in the clockwise direction.
e) Place the wooden dowel between the rotors as
shown in Figure 18.
FL3 Only: Secure the drive shaft with a chain
wrench to prevent rotation.
Figure 16
Figure 17
1265000117
7/29/03
Figure 16a

FL2 SerieS PumP
17
Tighten the first rotor nut with a
socket wrench (and Flat Cover Rotor
Bolt Tool on models 15-75). to the rec-
ommended torque (Table A2, page 5).
f) To tighten the second rotor place
the dowel on the opposite side of the
pump and tighten the second rotor
nut to the proper torque.
Use feeler gauges to verify the back and
radial clearances between the rotors and
the housing. A depth gauge should be
used to verify the front clearance (see
Table A3).
back Face cLearance
The rotor to housing back face clearance
is maintained by the gapping spacer.
To check the back clearance, mount the pump housing onto the gearbox. Make sure to use
washers and dome nuts on the long housings studs, to secure the housing. Assemble the gap-
ping spacer, rotor and rotor nut onto the shaft. (Refer to Table A2 for the proper rotor nut
torque.) Measure the clearance between the back face of the pump housing and the back of the
rotor with a feeler gauge. Check the reading with the recommended clearance, Table A3.
too much cLearance
If the clearance is greater than the clearance specified in Table A3, remove the gapping spacer
or the rotor and gapping spacer on the FL2 15. Machine and lap the o-ring end of the gapping
spacer to the required length. Lap the gapping spacer until the shim faces are perfectly flat and
the spacer thickness is the same around the entire circumference of the shim. (Recommended
lap compound – Liquid Diamond 14 microns)
Re-assemble the gapping spacer, rotor, and rotor nut. Recheck the back face clearance.
Assemble the pump wet end up as outlined in the “Pump End Assembly” section.
not enough cLearance
If the back clearance is less than the clearance specified in Table A3 a thicker shim must be
added. Remove the gapping spacer. Install a new standard length gapping spacer. Follow the
procedures outlined in the Too Much Clearance section above.
pump enD aSSembLy (cont.)
g) Install the cover o-ring into the o-ring groove in the cover. Install the cover and tighten the
dome nuts.
h) Rotate the drive shaft to verify that the pump turns freely. Do not rotate the shafts with the
cover removed. Rotors and housing could be damaged.
i) Check that the oil level is in the center of the oil level sight glass.
j) Install all required shaft guards. Install inlet and outlet piping. Verify that all valves on the
suction and discharge side of the pump are open. Follow proper lockout procedures to re-
supply the pump drive with the power. Start the pump.
Figure 18

FriStam PumPS
18
ShaFt anD/or bearing repLacement
Begin all pump maintenance by disconnecting the energy source to the pump.
Observe all lock out/tag out procedures as outlined by ANSI Z244.1-1982 and OSHA
1910.147 to prevent accidental start-up and injury.
tooLS requireD For ShaFt anD/or bearing repLacement
15 58 L & S 75 L & S
• 10 mm wrench • 10 mm wrench • 10 mm wrench
• 5 mm Allen wrench • 5 mm Allen wrench • 5 mm Allen wrench
• 10 mm tube for bearings • 15 - 17 mm tube for
bearings
100 L & S 130 L & S
• 17 mm wrench • 17 mm wrench
• 6 mm Allen wrench • 8 mm Allen wrench
• KM12 spanner wrench
Tools for all models:
• Spanner wrench • Wooden dowel • Feeler gauges
• Soft-faced hammer • Flat blade screwdriver
• Indicating torque wrench • Mild steel rod
• Bearing heater • Arbor press (beneficial)
gearbox DiSaSSembLy
Remove the oil drain plug and drain the oil.
Remove the coupling key from the drive
shaft.
FL2 15 & 58: remove guards.
Remove the rear cover bolts from the rear
cover.
Pull the rear cover off the drive shaft exten-
sion. If the cover sticks use a soft-faced
hammer to loosen it.
Remove the rear cover oil seal from the
rear cover and discard.
Remove the rear cover o-ring from the rear
cover and discard.
Straighten the locking tab of the bearing
lock washer. Reinstall the rotors on the
drive and idle shafts. Lock the rotor with a
wood dowel. Remove the lock nut and lock
nut washer from the drive shaft and idle
shaft.
!
Figure 20
for models
FL2 55-100

FL2 SerieS PumP
19
Pull the two gears off the pump shafts. Remove the gear keys.
For models 75-130 only: Remove and discard the rear bearing o-rings from the pump shafts
and rear bearing lip seals from the rear bearing bore.
Remove and discard the front bearing lip seals from the front bearing bore.
Place the gearbox, wet end down, on an arbor press.
Protect the shaft ends with a wood block and press the drive and idle shaft out of the gearbox.
Remove the rear bearing assemblies from the rear bearing bores and discard.
Remove and discard the rear bearing cups from the rear bearing bores.
Remove and discard the front bearing cups from the front bearing bores.
Heat the front bearing cones on the drive and idle shafts until they expand and drop off. Re-
move the bearing cones from the pump shafts.
gearbox aSSembLy
Position the gearbox with wet end up.
Unwrap the front bearing assemblies.
Insert the front bearing cups with the smaller inner diameter toward the inside of the gearbox,
into the bearing bores until seated against the shoulder. There should be a tight sliding fit
between the housing bore and the bearing cups.
Position the gearbox with the drive end up.
Unwrap rear bearing assemblies.
Insert the rear bearing cups, with the smaller inner diameter toward the inside of the gearbox,
into the rear bearing bores until seated against the shoulder. There should be a tight sliding fit
between the housing bore and the bearing cups.
Place the bi-wing rotors on a flat surface and insert the shafts into the rotor splines to stand
them vertical on a flat surface.
Lubricate the front and rear bearing areas of the drive and idle shafts with grease.
Heat the front bearing cone to 250°F (110°C).
Place the cone and roller assembly over the shaft, with the larger outer diameter toward the
rotor.
After the front bearing cone is cooled, use a .02 mm shim stock to check if the cone has
moved. The shim stock should not be able to fit between the front bearing cone and shaft
shoulder. If the shim can fit between the cone and shaft shoulder the cone will need to be
pressed back into place. A piece of mild or stainless steel pipe cut to fit over the shaft and ham-
mer could be used to seat the cone against the shaft shoulder. NOTE: Only tap on the inner
cone of the race.
For models 75-130 only: Pack the front cone and roller assemblies with grease for both shafts.
Place the gearbox over the shafts.

FriStam PumPS
20
For models 75-130 only: Generously apply grease to the rear bearing cups and insert into the
rear bearing bore.
For models 75-130 only: Pack the rear cone and roller assemblies with grease then heat the
cones to 250°F (110°C).
Place the cone and roller assemblies over the shafts with the smaller diameter end sliding over
the shaft first. Tap them into place if necessary. Make sure that there is some endplay.
Lubricate the gear area of the shaft and the face of the lock washer, with oil.
For models 75-130 only: Place the rear bearing o-rings over the shafts and seat against the
cone of the rear bearing.
For models 75-130 only: Lubricate the rear bearing lip seals with oil. Press the rear bearing
lip seals into the rear bearing bores. The flat side of the seal goes inside the gearbox and the
recessed side should face you.
Position both shaft gear keys to the 12:00 position.
Place the gear, lock washer and lock nut onto the shafts and hand tighten.
After the gears are installed, turn the shafts to make sure they turn freely and that the rotors
are timed correctly.
Use a spanner wrench to tighten the bearing lock nut on the drive shaft.
Measure rolling torque with no load on bearing. Set the torque wrench to zero while rotating,
this will remove the load caused by the lip seal.
For models 15 & 58: Measure rolling torque with no load on bearing, there should be zero
endplay on the shafts.
The bearing locknut should be tightened until the rolling torque on the shaft measures the
values in Table A3, Page 6.
Tighten the locknut on the idle shaft, following the previous steps.
For models 75-130 only: Measure the shaft endplay to be sure it is zero. If the endplay is not
zero, repeat the tightening steps. To repeat these steps, the locknut will have to be backed off
and the bearing will have to be tapped to remove the loading.
Lubricate and install the front bearing lip seals.
Lubricate and install the rear cover oil seal into the rear cover.
Install the rear cover o-ring and mount the rear cover assembly over the drive shaft extension
onto the gearbox.
Fill the oil reservoir with oil to the middle of the sight glass.