6.
Insert a brass bar in the port opening and between the
rotor teeth to keep the shaft from turning. Turn the locknut
counterclockwise and remove locknut. See
“Figure 6” on
page 5
or
“Figure 7” on page 5
.
7.
Loosen the two setscrews in the face of the bearing
housing and turn the thrust bearing assembly
counterclockwise and remove from casing. See
“Figure
6” on page 5
or
“Figure 7” on page 5
.
8. GG, HJ, HL:
Remove the snap ring from the shaft.
See
“Figure 6” on page 5
.
AS, AK, AL:
Remove the bearing spacer from the shaft.
See
“Figure 7” on page 5
.
9.
Remove the brass bar from the port opening.
10.
The rotor and shaft can now be removed by tapping on
the end of the shaft with a lead hammer or, if using a
regular hammer, use a brass or plastic barbrass or plastic
barbetween the shaft and hammer. The spring and rotary
member of the seal will come out with the rotor and shaft.
11. GG, HJ, HL:
Remove the inner snap ring and single
row ball bearing from the casing. See
“Figure 6”
on page 5
.
AS, AK, AL:
Remove the bearing retainer washer. The
washer may have stayed with the rotor and shaft when
removed or is against the ball bearing. See
“Figure 7” on
page 5
.
12.
Remove the seal seat or stationary part of the seal from
the casing.
13.
Disassemble the thrust bearing assembly.
GG, HJ, HL:
Remove the outer snap ring from the bearing
housing and remove the ball bearing.
See
“Figure 6” on page 5
.
AS, AK, AL:
Loosen the two setscrews in the flange of
the bearing housing. Rotate the end cap and lip seal
counterclockwise and remove. Remove the ball bearing.
See
“Figure 7” on page 5
.
The casing should be examined for wear, particularly in the
area between the ports. All parts should be checked for wear
before the pump is put together.
When making major repairs, such as replacing a rotor and
shaft; it is advisable to also install a new mechanical seal,
head and idler pin, idler and bushing. Refer to
“Installation:
Carbon Graphite Bushings” on page 9
.
Wash the bearings in clean solvent. Blow out the bearings
with compressed air. Do not allow the bearings to spin, turn
them slowly by hand. Spinning the bearings will damage
the race and balls. Make sure the bearings are clean, then
lubricate with non-detergent SAE 30 weight oil and check
for roughness. Roughness can be determined by turning
the outer race by hand. Replace the bearings if they have
roughness.
Be sure the shaft is free from nicks, burrs and foreign
particles that might damage the mechanical seal. Scratches
on the shaft in seal area will provide leakage paths under the
mechanical seal. Use a fine emery cloth to remove scratches
or sharp edges.
PUMP ASSEMBLY
Mechanical Seal
1.
Installing New Seal:
For
PTFE fitted mechanical seal
: see
“Figure 9” on page
7
and
“Figure 10” on page 7
.
For
SEP1 pumps
: see
“Figure 12” on page 8
and
“Figure 13” on page 8
.
For
all seals
: see
“Figure 8” on page 6
and
“Figure
11” on page 7
.
GENERAL INFORMATION:
Mechanical seals for HJ, HL, AS, AK and AL size
4197 Series™ pumps are of the drive set screw type.
Mechanical seals for the GG4197 pumps are friction
driven and are pressed onto the rotor hub.
Installation sleeves are furnished with replacement seals
for GG, AS and AK size pumps. (this is not necessary with
HJ and HL pumps).
NOTE:
Cleanliness during installation
is essential to seal performance. Never allow the seal
faces to contact a dirty surface.
ORDER OF ASSEMBLY:
1.
Stationary seat and seat ring in casing
2.
Installation sleeve on the shaft (where appropriate)
3.
Seal rotating portion on the shaft
4.
Rotor and shaft into casing
5.
Head with gasket and idler onto the casing
PREPARATION:
Remove burrs from threads and gently radius leading
edges on rotor shaft. Use 300 grit paper to radius the
edges and to polish the shaft at the seal area. Clean the
rotor hub, shaft and seal seat bore in casing, making sure
they are free from dirt and grit.
Place installation sleeve on shaft, wide end against shaft
shoulder. See
“Figure 8” on page 6
,
FIGURE 8 (ELASTOMERIC BELLOWS SEAL SHOWN)
NOTE:
Coat rotor shaft, tapered installation sleeve and inner diameter
of mechanical seal with P-80
®
or equivalent before assembly.
Tapered Installation Sleeve
Shaft
Mechanical Seal Rotary Member
P-80
®
is a registered trademark of International Products Corporation
TSM 1741 | Issue B | Page 6 of 20
© 2019 Viking Pump, Inc. • Cedar Falls, IA
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
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© Viking Pump, Inc.
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© Viking Pump, Inc.
© Viking Pump, Inc.
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© Viking Pump, Inc.
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