Viking Pump TSM163: N-R 337/4337 - Manual (Page 6)

SECTION TSM 163 ISSUE D PAGE 6 OF 15
FIgURE 7
LOCKWASHER WITH TANg
LOCKNUT
12. Clean all parts thoroughly and examine for wear and
damage. Check the idler bushing and idler pin, replace if
necessary.
If the idler pin is to be replaced, the oil groove must be
installed facing center of the crescent on the head.
If lipseals need replacement, press in the end cap with
the lip facing the end of the shaft.
If the idler bushing is to be replaced, a press must be
used to remove the old bushing and install the new one.
The bushing position after being pressed in should be
flush with the face of the idler.
For a carbon graphite idler bushing,
refer to
INSTALLATION OF CARBON gRAPHITE BUSHINgS,
page 13.
NOTE: R idler bushings are shrink fit.
Wash the anti-friction bearings (roller bearings) in clean
solvent. Blow out the bearings with compressed air. Do
not allow the bearings to spin; turn the bearings slowly
by hand. Spinning the bearings will damage the race and
rollers. 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. CAUTION: do not intermix inner and
outer races for the roller bearings. Replace the bearings
if they have roughness.
Examine the casing for wear. Check the condition
of casing at seal area (surface between suction and
discharge port). If the surface is in good condition, the
casing need not be replaced.
When making major repairs, such as replacement of a
rotor, it is usually considered advisable to install a new
head and idler. When making minor repairs, where only
an idler bushing and idler pin are required, other new
parts are usually not necessary.
ASSEMBLY
1. Install the rotor bearing sleeve and gasket on the casing.
Coat both sides of the gasket with thread sealant (pipe
dope) and quickly install the gasket and rotor bearing
sleeve on the casing. Place a support under rotor bearing
sleeve to prevent casing and rotor bearing sleeve from
tilting down while the rotor is being installed.
2. Check the casing to be sure the drain plug has been
removed.
3. Carefully check the shaft, remove any burrs or rough
surfaces to avoid damaging the rotor bearing sleeve
bushing while installing the rotor and shaft into the casing.
Coat the inner diameter of the rotor bearing sleeve
bushing and shaft with a thin coat of non-detergent SAE
30 weight oil.
Support the weight of the rotor with a hoist. A cable sling
can be used around the shaft, or around rotor teeth, to
carry weight of the part while being assembled into the
casing.
Place end of the rotor shaft through the casing, into the
bushing slowly turn rotor from right to left while pushing
into casing. When the shaft first protrudes from stuffing
box, stop pushing. Check to see if the large diameter
of the shaft has protruded far enough into rotor bearing
sleeve to permit installing packing rings.
Use packing suitable for the liquid being pumped.
Lubricate packing rings with oil, grease or graphite to aid
assembly. Packing ring joints should be staggered from
one side of shaft to the other. A length of pipe will help
set each packing ring.
4. Place the packing gland and inner end cap (position
spanner wrench holes on side next to packing gland)
with lip seal (lip facing away from packing gland) over
the end of the shaft.
5. Push the rotor far into the casing as far as it will go.
6. Prior to installing the head, coat the casing face with
thread sealant (pipe dope) and place a new .015” head
gasket on the mounting studs. Coat the dry side of
gasket with thread sealant (pipe dope) and prepare to
mount the head and idler assembly.
The pump head and casing were marked before
disassembly to ensure proper reassembly. If not, be sure
idler pin, which is offset in the pump head, is positioned
toward and equal distance between the port connections
to allow for proper flow of liquid through the pump. Place
the head on the pump, slightly tilting the top of the head
back away from casing until the crescent enters the
inside diameter of rotor. Rotate the idler on idler pin until
the idler teeth mesh with the rotor teeth. Raise head until
the face of the head is parallel with face of the casing
and work into position. Care must be taken to avoid
damaging the head gasket. Fasten the head to casing
with nuts and tighten evenly.
If relief valve was not removed from head, install on
head with adjusting screw cap pointed toward such port.
Refer to Figure 2, page 2. For PRESSURE RELIEF
INSTRUCTIONS, refer to page 14.