Viking Pump TSM143: N-P 335/4335 - Manual (Page 7)

SECTION TSM 143 ISSUE E PAGE 7 OF 15
If the relief valve was not removed from head, install
on head with adjusting screw cap pointed toward the
suction port. Refer to Figure 2, page 2. For PRESSURE
RElIEf INSTRUCTIONS, refer to page 14.
7. Push the rotor back against the head.
8. Install the drain plug in the casing.
9. Pack the pump with new packing. Refer to Figure 8 .
Models N and R335 have 6 rings of packing. Model
P335 has 8 rings of packing and a lantern ring. The
lantern ring should be installed after the fourth ring of
packing has been assembled into the packing box.
10. Install the thrust bearing housing on the end of rotor
bearing sleeve and tighten the nuts and capscrews
securely. It is not necessary to use a gasket between
these parts.
11. Insert both tapered roller bearings in the thrust bearing
housing, large end of inner races together. It is possible
to install bearings incorrectly, for proper assembly refer
to Figure 9 .
12. Install the bearing spacer collar on the shaft next to the
inner race of the roller bearing.
13. Turn the inner end cap into the thrust bearing housing
just far enough to hold in place.
Install the outer end cap and turn in approximately half
way.
DANGER !
before starting the pump, be sure all drive
equipment guards are in place.
failure to properly mount the guards may re-
sult in serious injury or death.
fIGURE 9
14. Insert a length of hardwood or brass bar through the port
opening between the rotor teeth to keep the rotor from
turning.
15. Install the lockwasher, placing the tang in the keyway on
the shaft. Tighten the locknut to 170-190 ft – lbs. torque.
Bend one tang of the lockwasher into a slot of locknut.
If tang does not line up with a slot tighten locknut until
it does. Failure to tighten the locknut or engage the
lockwasher tang could result in early bearing failure and
cause damage to rest of the pump.
16. Remove the length of hardwood or brass bar from the
port opening.
17. Install the nuts on the packing gland studs and tighten.
Do not over tighten,as it may cause binding on rotor
shaft.
18. Reinstall the circulation tubing to the casing and rotor
bearing sleeve.
19. Lubricate all grease fittings with multi-purpose grease,
NLGI #2.
20. Adjust the pump end clearance. Refer to ThRUST
bEARING ADJUSTMENT, page 13.
PUMP
MODEl
A (INCh) b (INCh) C (INCh)
N335 4.63 4.69 3.44
R335 5.63 4.69
3.44
P335 6.38 5.75 4.50
fIGURE 8
STUffING bOx DIMENSIONS
C B
A