Viking Pump TSM340.1: SG-10, SG-14 - Manual (Page 7)

SECTION TSM 340.1 ISSUE D PAGE 7 OF 11
DISASSEMBLY:
1. Remove pump from motor or other drive equipment. If
the pump is mounted using the footed bracket (B-mount),
remove the footed bracket so the pump is flat on the work
surface.
2. Refer to Figure 3 for the names of parts.
3. Mark bracket (2) and casing (19) before disassembly to
insure proper reassembly. Remove the capscrews (20) to
separate bracket from pump casing. It may be necessary
to tap on the ears of the bracket (where capscrews are
located) with a soft headed hammer to separate the
bracket from the casing.
4. Inspect casing o-ring (11). Replace as needed.
5. Remove driven shaft (13) and gear assembly from pump.
Leave drive shaft (12) and gear assembly in place.
6. To remove the gears (16) from the shafts, remove both
snap rings (14) from both sides of the gear. The gears
should then slide freely off the shaft.
NOTE: There is a small pin (15) located under the gear
which can fall out of its groove when the gears are
removed.
7. Inspect the gears and shafts for wear. Replace as
needed.
8. Remove the internal snap ring (4) from the bracket.
9. Using a soft headed hammer tap the drive shaft, on the
gear-side, through the bracket.
10. Remove the bearing (5), seal holder (6) and mechanical
seal (8) from the shaft. Replace the bearing mechanical
seal and o-ring (7). The spacer (9) sets the working length
of the mechanical seal. Use the factory part if replacement
is necessary.
ASSEMBLY:
1. Be sure to clean the bracket and casing thoroughly. If the
bearings were removed, install new pump bearings into
each bore using an arbor press. If carbon graphite, Refer
to “Installation of Carbon Graphite Bushings” below.
MODELS BEARING PRESS DEPTH
SG-10 / SG-410 0.060” - 0.080” (1.5 - 2 mm)
SG-14 / SG-414 0.070” - 0.090” (1.8 - 2.3 mm)
2. Coat the drive shaft with light oil and place the drive gear
into the bracket (into through hole) with the snap ring on
the drive side of the bracket.
3. Assemble the shaft / gear assemblies. Install one snap
ring (14) onto each shaft (the side closest to the bracket
for the drive shaft). Place the gear pin into its groove on
each shaft. Slide the gear for each shaft over the pin and
lock into place using the second snap ring. NOTE: Proper
snap ring orientation can be seen in Figure 2. The gear
pin blocks the flow path along the gear ID in one of the
gear grooves. Make sure the snap rings do not block the
other.
4. Coat the shaft / gear assemblies with light oil. Place the
driven shaft in the blind bracket hole.
5. Lubricate the casing O-ring using a compatible lubricant
and place it in the groove of the casing.
6. Slide the pump casing over the gear and shaft assemblies
until flush with the bracket. Be sure the casing is oriented
correctly.
7. Place the capscrews into the bracket and tighten evenly.
DANGER !
Before opening any Viking pump liquid cham-
ber (pumping chamber, reservoir, relief valve
adjusting cap fitting etc.) Be sure:
1. That any pressure in the chamber has been
completely vented through the suction or
discharge lines or other appropriate openings
or connections.
2. That the driving means (motor, turbine,
engine, etc.) has been “locked out” or made
non- operational so that it cannot be started
while work is being done on pump.
3. That you know what liquid the pump has been
handling and the precautions necessary to
safely handle the liquid. Obtain a material
safety data sheet (MSDS) for the liquid to be
sure these precautions are understood.
Failure to follow above listed precautionary
measures may result in serious injury or death.
11. Inspect the bearings or bushings (3). If the bearings or
bushings need to be replaced:
Remove the bearings from the bracket and casing using a
Blind Bearing Puller. To remove carbon graphite or silicon
carbide bushings, use a cold chisel or punch to break the
bushing. Be careful not to damage the bore.
MODELS RECOMMENDED CAPSCREW TORQUE
SG-10 / SG-410 80 ft. lbs. (110 Nm)
SG-14 / SG-414 100 ft. lbs. (140 Nm)
8. At this point it may be easier to tip the pump onto the
casing (drive shaft pointing up). Slide the spacer (9) over
the drive shaft until flush with the snap ring on the keyed
side of the shaft. The spacer sets the working length of
the mechanical seal. Use the factory part if replacement
is necessary.
9. Place the new stationary seat of the mechanical seal in
the seal holder with the hard face oriented outwards. The
face must be kept clean of any contaminants.
10. Check to be sure the drive shaft is free of any burrs,
particularly in the keyway. Lightly lubricate the ID of the
elastomeric bellows on the rotating part of the mechanical
seal and the area on the shaft where it will be located.
Once the bellows has been lubricated the pump must be
assembled in approximately 5 minutes. Carefully slide the
rotating part of the seal onto the shaft until it contacts the
spacer. The flat carbon face must be facing the keyway
and be kept clean of any contaminants.