Fristam Pump FM Series Instructions for use

FM Series Pump
1
INSTRUCTION AND MAINTENANCE MANUAL:
FM SE R I E S PU M P
SANITARY CENTRIFUGAL PUMPS

Fristam Pumps
2
DE S C R I P T I O N
This manual contains installation, operation, assembly, disassembly and repair instructions for the Fristam
FM multi-stage pump.
The motors are standard NEMA totally enclosed fan cooled (TEFC) motors. These motors do require feet.
Replacement motors are readily available from local motor distributors.
CAUTION: 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.

FM Series Pump
3
TA b L E O F CO N T E N T S
Te c h n i c a l in f o r m a T i o n ...........................................................................................................................4-5
Pr e v e n T i v e ma i n T e n a n c e ............................................................................................................................ 5
in s T a l l a T i o n ...........................................................................................................................................6-9
s
h a f T al i g n m e n T .......................................................................................................................... 8
e
l e c T r i c a l in s T a l l a T i o n ............................................................................................................... 9
W
a T e r fl u s h in s T a l l a T i o n ............................................................................................................ 9
s
T a r T -u P in s T r u c T i o n s .................................................................................................................. 9
Pa r T s li s T ..........................................................................................................................................10-12
as s e m b l y Dr a W i n g s ............................................................................................................................10-14
fm3 (hP3) se a l as s e m b l y ........................................................................................................ 10
fm5 (hP4) se a l as s e m b l y ........................................................................................................ 11
fm3 ex P l o D e D Pu m P he a D as s e m b l y .......................................................................................... 12
fm5 ex P l o D e D Pu m P he a D as s e m b l y .......................................................................................... 13
e
x P l o D e D be a r i n g bl o c k as s e m b l y ............................................................................................. 14
se a l re P l a c e m e n T ..............................................................................................................................16-19
P
u m P he a D Di s a s s e m b l y ............................................................................................................. 16
P
u m P he a D as s e m b l y .............................................................................................................17-19
sh a f T a n D /o r be a r i n g re P l a c e m e n T ....................................................................................................20-22
b
e a r i n g bl o c k Di s a s s e m b l y ........................................................................................................ 20
b
e a r i n g bl o c k as s e m b l y .......................................................................................................21-22
ch e c k i n g T h e im P e l l e r ga P ..................................................................................................................... 23
Wa r r a n T y ................................................................................................................................................ 24

Fristam Pumps
4
Te c h n i c a l in f o r m a T i o n
Sp e c i f i c a T i o n S
Maximum Inlet Pressure........................................................................................................... 1000 PSI
Temperature Range ............................................................................................................-40°F - 400°F
Noise Level...........................................................................................................................60 - 85 dB(A)
ST a n d a r d ma T e r i a l S o f co n S T r u c T i o n (no T e : oT h e r o p T i o n S a v a i l a b l e )
Product Contact Components.........................................................................AISI 316L Stainless Steel
Pump Seal Components
Single Rotating Seal................. 316L Stainless Steel with Silicon Carbide Insert (silver/gray)
Stationary Seals......................................................................................Silicon Carbide (black)
Double Rotating Seal.......................................................................................... Carbon (white)
Product Contact Surface Finish..................................................................................................32 in Ra
Gaskets / O-rings ............................................................................................................................. Viton
Bearing Block ............................................................................................................................Cast Iron
Se a l in f o r m a T i o n
Double Mechanical
Recommended Seal Flush Pressure..................................................................5 PSI Maximum
Recommended Seal Flush Flow............................................................... 1-2 Gallons per Hour
re c o m m e n d e d To r q u e va l u e S
Cover Nuts .................................................................................................................................105 ft-lbs
Impeller Nut
FM3 .................................................................................................................................40 ft-lbs
FM5 .................................................................................................................................90 ft-lbs
Seal Retaining Ring Bolts .............................................................................................................5 ft-lbs
Seal Driver Set Screw (FM3 only)..............................................................................................10 in-lbs
Housing Bolts ..............................................................................................................................50 ft-lbs
Bearing Cap Bolts........................................................................................................................10 ft-lbs
Bearing Locknut..........................................................................................................................50 ft-lbs
im p e l l e r Ga p S (im p e l l e r T o ho u S i n G )
All FM Pumps ...............................................................................................0.8-1.0 mm ( 0.030-0.040”)
lu b r i c a T i o n
Bearing Block Oil .................................................................................................................... ISO VG 68

FM Series Pump
5
To o l s f o r As s e m b l y & Di s A s s e m b l y
7/16” socket .................................................................................................... Seal Retaining Ring Bolts
Ratchet ..................................................................................................................... For loosening bolts
Torque wrench...................................................................................................... For proper tightening
Adjustable pliers ............................................................................................ For removing Water Pipes
Chain wrench........................... For holding the Shaft when tightening & loosening the Impeller Nut
Food grade lubricant ..........................................................................For lubricating o-rings & gaskets
Standard screwdriver............................................ For installing & removing the Bearing Lockwasher
Soft-face hammer .......................................................................... For installing & removing the Shaft
Feeler gages .....................................................................................................For gapping the Impeller
FM3 Tools
15/16” socket .............................................................................................................Cover Nuts
1” socket .................................................................................................................Impeller Nut
3/32” Allen wrench socket...........................................................Double Seal Driver Set Screw
3/4” socket ............................................................................................................Housing Bolts
1/2” socket ......................................................................................................Bearing Cap Bolts
M50 Spanner wrench .......................................................................................Bearing Locknut
FM5 Tools
24mm socket .............................................................................................................Cover Nuts
32mm socket ..........................................................................................................Impeller Nut
18mm socket ........................................................................................................Housing Bolts
13mm socket ..................................................................................................Bearing Cap Bolts
M65 Spanner wrench .......................................................................................Bearing Locknut
re c o m m e n D e D Pr e v e n T i v e mA i n T e n A n c e
re c o m m e n D e D se A l mA i n T e n A n c e
Visually inspect mechanical seal daily for leakage.
Replace mechanical seal annually under normal duty.
Replace mechanical seal as often as required under heavy duty.
el A s T o m e r in s P e c T i o n
Inspect all elastomers when performing pump maintenance. We recommend replacing elastomers (o-
rings and gaskets) during seal, pump shaft and/or motor replacement.
lu b r i c A T i o n
The oil level should be maintained to the center of the sight glass on the side of the bearing block. The
oil should be changed every 2,000 hours or 3 months under normal operating conditions. Make sure
the oil drain pipe and cap are properly tightened to prevent any oil leakage from the bearing block.
mo T o r mA i n T e n A n c e
Consult motor manufacturer for recommended maintenance.

Fristam Pumps
6
1265000340 Rev-
IN S T A L L A T I O N
UN P A C k I N G
Check the contents and all wrapping when unpacking the pump. Inspect the pump carefully for any
damage that may have occurred during shipping. Immediately report any damage to the carrier.
Remove the shaft guard and rotate the pump shaft by hand to make sure the impeller rotates freely.
Keep the protective caps over the pump inlet and outlet in place until you are ready to install the
pump.
IN S T A L L I N G
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 (i.e. explosive, corrosive, etc.) must use a motor and
drive with the appropriate enclosure characteristics. Failure to use an appropriate motor type
may result in serious damage and/or injury.
PIP IN G GU I D E L I N E S
This section describes good piping practices to obtain maximum efficiency and service life from your
pump.
Maximum performance and trouble-free operation require adherence to good piping practices.
FI G U R E 1
Ensuring proper piping support and alignment at both
the suction inlet and discharge outlet can help prevent
serious damage to the pump housing.
FI G U R E 2
Avoid abrupt transitions in the piping system.
Avoid throttling valves in the suction piping.
Keep suction lines as short and direct as possible.
Ensure that the NPSH available in the system is greater
than NPSH required by the pump.

FM Series Pump
7
FI G U R E 3
Avoid sump areas where sediments may collect.
FI G U R E 4
Avoid the formation of air pockets in the piping.
FI G U R E 5
Avoid abrupt closure of shut-off valves, this maycause hydraulic shock which can cause severe damage
to the pump and system.
Avoid elbows in the suction line if possible. When necessary they should be located 5 pipe diameters
away from the pump inlet, and have a bend radius greater than 2 pipe diameters.
Check valves in discharge line should be a minimum of 5 ft. away from the pump outlet.

Fristam Pumps
8
AY
MAX.
Y
MIN.
PARALLEL ANGULAR
1265000238 REV. -
FI G U R E 6
Sleeve
Size
Type E Type E
Parallel
A
Angular
Y max. - Y min. Y* Parallel A
Angular
Y max. - Y min. Y*
6 0.015” 0.070” 2.375” 0.015” 0.070” 2.375”
7 0.020” 0.081” 2.563” 0.020” 0.081” 2.563”
8 0.020” 0.094” 2.938” 0.020” 0.094” 2.938”
9 0.025” 0.109” 3.500” 0.025” 0.109” 3.500”
10 0.025” 0.128” 4.063” 0.025” 0.128” 4.063”
11 0.032” 0.151” 4.875” 0.032” 0.151” 4.875”
12 0.032” 0.175” 5.688” 0.032” 0.175” 5.688”
13 0.040” 0.195” 6.688” 0.040” 0.195” 6.688”
14 0.045” 0.242” 7.750” 0.045” 0.242” 7.750”
* The “Y” dimension is shown for reference.
AL I G N M E N T
In most cases, the pump will be shipped with a drive unit mounted on a baseplate. The drive and pump
are aligned at the factory; however, this alignment should be checked after installation (Figure 6). Mis-
alignment 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.
To check the 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 anges and mea-
sure the maximum offset at various points around the periphery of the coupling without rotat-
ing the coupling. If the maximum offset exceeds the figure shown under “Parallel” in the table,
realign the shafts.
• Check the angular alignment with a micrometer or caliper. Measure from the outside of one
flange to the outside of the other (“Y”) at intervals around the periphery of the coupling. Deter-
mine 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 the
table. If a correction is necessary be sure to recheck the parallel alignment.
• Reinstall the wire ring on the O.D. of the coupling sleeve.
WO O D S SU R E -FL E x CO U P L I N G AL I G N M E N T

FM Series Pump
9
2.5 FT.
COOLING WATER IN
WATER FLUSH CONNECTIONS
TO DRAIN
THROTTLE VALVE
TO 3-12 gal/hr
1/8" N.P.T.
1265000333 Rev-
VISIBLE WATER
FLOW
fi g u r e 7
Set up the water flush for the double mechanical seal as shown.Use only 3-12 gallons per hour of
water at a pressure of 1-2 PSI. Excessive seal pressure and/or flow rate through the product seal cav-
ity may cause increased seal wear and shorten seal life.
Pipe the exit side of the water flush with 2-5 feet physical height of tubing.This ensures that some
water is always in the center seal and the seal never runs dry.
It is desirable to have the flush water on the outlet side visible. This allows an easy check to see that the
flush water is on and also if the seal is functioning properly. In a malfunctioning seal the flush water
will disappear, become discolored, or show an unusual increase in flow. If these conditions exist, check
the seal and replace if necessary.
el e c T r i c A l in s T A l l A T i o n
The size of the motor selected should meet the requirements of the operating conditions. A change in
conditions (for example, higher viscosity, higher product specific gravity) can overload the motor. For
technical assistance regarding operating condition changes, please contact Fristam Pumps.
Have an electrician connect the motor using sound electrical practices. Ensure that proper motor
overload protection is provided.
WA T e r fl u s h in s T A l l A T i o n
sT A r T -u P in s T r u c T i o n s
• Remove any foreign matter that may have entered the pump. Do not use the pump to ush the
system.
• Before adding oil to the bearing block check the oil drain pipe and cap to make sure they are both
properly tightened to avoid any oil leakage from the bearing block. Fill the bearing block with oil
to the center of the sight glass on the side of the bearing block (see pages 4 & 5).
• Make sure the pump is ooded with product before start-up. The pump must not run dry, even
momentarily.
• Make sure the pump is running in the proper direction. The motor fan must turn clockwise
when looking at the end of the motor.

Fristam Pumps
10
FM3 (hP3) SE A L AS S E M b L Y
Description Material Qty. Part No.
Single Seal Driver SS 1 1224000010
Single Rotating Seal SS/Silicon Carbide Insert 1 1810600084
Single Seal Spring - 1 1820000025
Gapping Spacer (7.4mm)
SS 1
1224000039
Gapping Spacer (7.7mm) 1224000049
Gapping Spacer (8.0mm) 1224000038
Single Stationary Seal Silicon Carbide 1 1815600002
Double Stationary Seal Ceramic 1 1815600093
Double Rotating Seal Carbon 1 1810600056
Double Seal Spring - 1 1820000016
Set Screw - 2 1101000112
Double Seal Driver SS 1 1811000023
Double Seal Drive Ring SS 1 1811000027
Double Seal O-Ring Viton 11180000329
EPDM 1180000348
Flat Gasket Viton 11181000047
EPDM 1181000147
Single Stationary Seal O-Ring Viton 11181000099
EPDM 1181000146
Single Seal Driver O-Ring Viton 11180000344
EPDM 1180000151
Single Rotating Seal O-Ring Viton 11180000030
EPDM 1180000247
Impeller Gasket Viton 2* 1181000097
EPDM 1181000145
* Quantity may vary
1265000334 Rev A
Single Seal Driver
Single Rotating Seal Single Seal Spring
Single Stationary Seal
Gapping Spacer
Double Stationary Seal
Double Rotating Seal
Double Seal Spring
Set Screw
Double Seal Driver
Double Seal Drive Ring
Double Seal O-Ring
Flat Gasket
Single Stationary
Seal O-Ring
Single Seal
Driver O-Ring
Single Rotating
Seal O-Ring
Impeller Gasket

FM Series Pump
11
FM5 (hP4) SE A L AS S E M b L Y
Description Material Qty. Part No.
Single Seal Driver SS 1 1811000035
Single Rotating Seal SS/Silicon Carbide Insert 1 1810600099
Single Seal Spring - 1 1820000028
Gapping Spacer (7.6mm)
SS 1
1224000087
Gapping Spacer (7.8mm) 1224000088
Gapping Spacer (8.0mm) 1224000089
Gapping Spacer (8.2mm) 1224000090
Gapping Spacer (8.4mm) 1224000091
Single Stationary Seal Silicon Carbide 1 1815600095
Double Stationary Seal Carbon 1 1815600096
Double Rotating Seal Carbon 1 1810600100
Double Seal Spring - 1 1820000028
Double Seal Drive Ring SS 1 1811000036
Double Seal O-Ring Viton 11180000030
EPDM 1180000247
Flat Gasket Viton 11181000140
EPDM 1181000162
Single Stationary Seal O-Ring Viton 11180000253
EPDM 1180000278
Single Seal Driver O-Ring Viton 11180000329
EPDM 1180000348
Single Rotating Seal O-Ring Viton 11180000233
EPDM 1180000366
Impeller O-Ring Viton 2* 1180000030
EPDM 1180000247
* Quantity may vary
Double Seal Spring
Single Stationary
Seal O-Ring
Single Seal Spring
Gapping Spacer
Single Seal Driver
Single Rotating
Seal O-Ring
Impeller O-Ring
Single Seal
Driver O-Ring
Flat Gasket
Double Seal O-Ring
Double Seal Drive Ring
Double Rotating Seal
Double Stationary Seal
Single Stationary Seal

Fristam Pumps
12
Description Qty
Model
Description Qty
Model
FM3 FM5 FM3 FM5
Cover Nut 8 1103000050 1103000012 Bearing Cover Bolt 8* 1101000096 1101000011
Cover Washer 8 1104000022 Front Bearing Cover 1 1303000008 1303000013
Cover 1 1493620000 1498620000 Front Bearing Cover
O-Ring 11180000148 1180000748
Cover O-Ring 1* 1180000330 1180000587 Snap Ring 1 1148000005 1148000031
Impeller Nut 1 1954000005 1954000036 Front Bearing 1 1173000012 1173000029
Impeller (First Stage) 1 1493630171 1498630000 Shaft (1-Stage)
1
1340000008 1340000013
Impeller (Second, Third & Fourth Stage) 1* 1493630187 1498630001 Shaft (2-Stage) 1340000009 1340000012
Stage Bushing 1* 1224000048 N/A Shaft (3-Stage) 1340000010 N/A
Diffuser 1* 1493610001 1498610001 Shaft (4-Stage) 1340000011 N/A
Housing Stud (1-Stage)
8
1103000011 1103000066 Coupling Key 1 1315000008 1315000041
Housing Stud (2-Stage) 1103000009 1103000065 Guard 2 1936000030 1936000135
Housing Stud (3-Stage) 1103000007 N/A Guard Screw 4 1102000000
Housing Stud (4-Stage) 1103000005 N/A Drain Plug Cap 1 1226000007
Housing 1 1493610000 1498610000 Drain Plug Nipple 1 1226000006
Water Pipe 2 1910000007 Sight Glass 2 1248000019
Retaining Ring 1 1148000023 1148000030 Bearing Block 1 1310600038 1310600108
Retaining Ring Bolt 4 1101000086 Vent Cap 1 1248000007 1248000013
Impeller Key (1-Stage)
1
1315000021 1315000036 Vent Cap Cover 1 1248000009 N/A
Impeller Key (2-Stage) 1315000006 1315000035 Rear Bearing 2 1173000036 1173000030
Impeller Key (3-Stage) 1315000022 N/A Bearing Lockwasher 1 1104000016 1104000058
Impeller Key (4-Stage) 1315000007 N/A Bearing Locknut 1 1306000005 1306000074
Housing Lockwasher 4 1104000006 Rear Bearing Cover O-Ring 1 1180000149 1180000747
Housing Bolt 4 1101000097 1101000037 Rear Bearing Cover 1 1303000009 1303000014
Front Labyrinth Seal 1 1812000023 1812000037 Rear Labyrinth Seal 1 1812000023 1812000038
* Quantity may vary
PA R T S LI S T

FM Series Pump
13
Impeller Key
Cover Nut
Cover
Cover Washer
Impeller Nut
Impeller
(w/ Short Hub)
Impeller O-Ring
Water Pipe
Housing Bolt
Double Seal
Drive Ring Single Seal Driver O-Ring
Single Rotating Seal O-Ring
Gapping Spacer
Single Stationary Seal O-Ring
Housing Lockwasher
Double Seal O-Ring
Double Rotating
Seal
Retaining Ring Bolt
Retaining Ring
Double Stationary
Seal
Double Stationary
Seal O-Ring
Housing
Double Seal Spring
Single Stationary Seal
Single Rotating Seal
Single Seal Spring
Single Seal Driver
Impeller O-Ring
Cover O-Ring
Diffuser
Impeller (w/ Long Hub)
Cover O-Ring
Housing Stud
FM5 Ex P L O D E D PU M P hE A D AS S E M b L Y

Fristam Pumps
14
1265000359 REV -
Impeller Key
Cover Nut
Cover
Cover Washer
Impeller Nut
Impeller
(w/o Backplate)
Impeller Gasket
Housing Bolt
Housing Lockwasher
Single Rotating Seal O-Ring
Single Stationary Seal O-Ring
Retaining Ring
Bolt
Double Rotating
Seal O-Ring
Retaining Ring
Double Stationary
Seal
Flat Gasket
Housing
Double Seal
Spring
Single Stationary Seal
Single Rotating Seal
Single Seal Driver
Stage Bushing
Diffuser
Housing Stud
Double Rotating
Seal
Double Seal
Driver
Set Screw
Double Seal
Drive Ring
Water Pipe
Gapping Spacer
Single Seal Driver O-Ring
Single Seal Spring
Cover O-Ring
Impeller
(w/ Backplate)
Impeller Gasket
Cover O-Ring
FM3 Ex P L O D E D PU M P hE A D AS S E M b L Y
Impeller Gasket

FM Series Pump
15
Rear Labyrinth Seal
Bearing Cover Bolt
Rear Bearing Cover
Rear Bearing Cover O-Ring
Bearing Locknut
Bearing Lockwasher
Rear Bearing Vent Cap
Bearing Block
Front Labyrinth Seal
Bearing Cover Bolt
Front Bearing Cover
Front Bearing Cover O-Ring
Snap Ring
Front Bearing
Shaft
Coupling Key
Guard
Guard Screw
Sight Glass
Drain Plug Nipple
Drain Plug Cap
Ex P L O D E D bE A R I N G bL O C k AS S E M b L Y

Fristam Pumps
16
PU M P hE A D DI S A S S E M b L Y
FI G U R E 8
Remove the cover and discard the o-ring.
Place a chain wrench on the shaft to prevent it from rotating. Remove the impeller nut and discard the
o-ring or gasket.
Remove the impeller(s) and diffuser(s) and discard the o-ring(s) and gasket(s). FM3 Only: Be careful
not to damage the carbon bushing inside the diffuser(s) during removal.
FI G U R E 9
Remove the single seal components and discard
the single rotating seal, spring, stationary seal
and o-rings. Note: Do not discard the single
seal driver and gapping spacer.
Remove the guards.
Remove the water pipes.
Impeller
(w/ Short Hub)
Impeller
(w/ Long Hub)
FI G U R E 10
Remove the housing. Remove the retaining ring from the back of the housing.
Remove the double seal components and discard the double rotating seal, stationary seal, flat gasket,
spring and o-rings.
Note: Do not discard the retaining ring, bolts or double seal drive ring.

FM Series Pump
17
FI G U R E 12
Install the flat gasket, double
stationary seal and retaining ring.
Use a torque wrench to tighten the
retaining ring bolts.
FI G U R E 11
Install the double seal drive ring making sure to slide
the tabs on the ring into the slots on the shaft. FM3
Only: The shorter tabs on the seal driver slide into
the shaft slots.
Install the spring, o-ring and the double rotating seal.
Be sure to slide the tabs on the drive ring into the slots
in the rotating seal.
PU M P hE A D AS S E M b L Y
Short Tab
(FM3 Only)
Lubricate
FI G U R E 13
Install the housing. Use a torque
wrench to tighten the housing bolts.
Install the single stationary seal o-
ring onto the single stationary seal.
Install the stationary seal making
sure to align the pins in the housing
with the slots in the seal. Press the
seal into the housing until it snaps
into place.
Install the gapping spacer.
Install the seal driver o-ring.
Single Stationary
Seal O-Ring
Lubricate

Fristam Pumps
18
FI G U R E 14
Install the single rotating seal o-ring onto the single seal driver.
Install the single seal spring behind the pins in the rotating seal.
Install the driver into the rotating seal making sure to align the
pins with the slots.
FI G U R E 15
Install the single rotating seal and
driver assembly.
Install the water pipes and guards.
Single Rotating
Seal O-Ring
Single Seal Spring
If you replaced the shaft and/or bearings, the impeller gap must be checked before proceeding
(Figure 25, page 23).

FM Series Pump
19
FI G U R E 16 (MU L T I ST A G E PU M P ON L Y )
Install the impeller key.
Install the impeller o-rings/gaskets into the groove on the back of the impellers.
Install the impeller nut o-ring/gasket into the groove on the back of the impeller nut.
Install the cover o-ring into the groove on the back of the cover.
Install the short impeller first, then the diffuser, then the long impeller. FM3 Only: Be careful not to
damage the carbon bushing inside the diffuser(s) during installation.
Note: The number of impellers and stages will vary, depending on the number of stages in the
pump.
Install the impeller nut and hand tighten. Note: On multi stage pumps, the cover nuts must be
tightened prior to tightening the impeller nut.
Install the cover. Use a torque wrench to tighten the cover nuts in a cross-tightening pattern.
Place a chain wrench on the shaft to prevent it from rotating while tightening the impeller nut. Use a
torque wrench to tighten the impeller nut.
FI G U R E 16 (SI N G L E ST A G E PU M P ON L Y )
Install the impeller key.
Install the impeller o-ring/gasket into the groove on the back of the impeller.
Install the impeller nut o-ring/gasket into the groove on the back of the impeller nut.
Install the cover o-ring into the groove on the back of the cover.
Install the impeller and impeller nut. Place a chain wrench on the shaft to prevent it from rotating
while tightening the impeller nut. Use a torque wrench to tighten the impeller nut.
Install the cover. Use a torque wrench to tighten the cover nuts in a cross-tightening pattern.
Impeller
(w/ Short Hub)
Impeller
(w/ Long Hub)

Fristam Pumps
20
bE A R I N G bL O C k DI S A S S E M b L Y
FI G U R E 17
Place an oil pan below the drain plug. Remove the drain plug cap and drain the oil. Replace the drain
plug.
Remove the bearing covers and discard the o-rings. FM3 Only: Remove the double seal driver from
the shaft prior to removing the front bearing cover.
Remove the snap ring.
FI G U R E 18
Tap on the threaded end of the shaft with a soft-faced hammer to remove the shaft assembly. Support
the shaft during removal so that it doesn’t become damaged.
Remove the outer race of the front bearing.
FI G U R E 19
Straighten the bent bearing lockwasher tab and remove the bearing locknut and washer.
Remove the two rear bearings by pressing them off of the shaft.
Remove the inner race of the front bearing by heating it with a torch until it expands and can be slid
off.
Prior to disassembling the bearing block, complete the pump head disassembly (Figure 8-10, page
16).
Press
Press Heat
Double Seal Driver
(FM3 Only)