Viking Pump TSM845.1: LQ-QS 825, 823, 827 - Manual (Page 9)

SECTION TSM 845 1 ISSUE E PAGE 9 OF 13
INSTALLATION Of BUSHINGS
CARBON GRAPHITE:
When installing carbon graphite bushings, extreme care must
be taken to prevent breaking Carbon graphite is a brittle
material and easily cracked If cracked, the bushing will quickly
disintegrate Using a lubricant on the bushing and mating part
will help in installation The additional precautions listed below
must be followed for installation:
1. An arbor press must be used for installation
2. Be certain bushing is started straight
3. Do not stop pressing operation until bushing is in proper
position, starting and stopping will result in cracking
bushing
fIGURE 15
COVER END Of MAGNET
WITH PIECE Of SHEET
METAL APPROX. 10” x 10”
OUTER
MAGNET
ASSEMBLY
OUTER
SPACER
BEARING
HOUSING
OUTER BEARING
SET SCREWS (2)
LOCK WASHER
LOCK NUT
END CAP
LIP SEAL
.75 REf
INNER SPACER
GREASE fITTING
INNER BEARING
TRB Tighten the endcap by hand until tight and secure in
position with the (2) setscrews
3. Insert the outer magnet shaft through the bearings and
the spacers When the shaft is in the proper position
there should be approximately 0 75” between the magnet
and the housing See figure 15
4. Place the lock washer onto the shaft then thread the
locknut onto the shaft Tighten locknut to 50 Ft-Lbs then
bend over a lockwasher tab
5. Tighten the endcap to 75 Ft-lbs and rotate bearing housing
2-3 turns Back off the end cap and then retighten to 75
Ft-Lbs Tighten the two 31” setscrews onto the endcap
Use the grease fitting to fill the bearing chamber with
additional grease
4. Check bushing for cracks after installation
SILICON CARBIDE:
When installing silicon carbide bushings into a metal part
the mating part must be heated to 600ºF (preferably in an
oven) Bushing must be quickly put into the proper position
before the mating part cools down and the bushing heats up
FAILURE TO FOLLOW THIS PROCEDURE WILL RESULT
IN CRACKED BUSHINGS.
PUMP ASSEMBLY
Use a lubricant compatible with the fluid being handled when
reassembling the pump
Inspect all parts, replacing any worn parts Polish out any
nicks or burrs and clean all parts thoroughly Make sure drilled
holes in rotor, shaft, orifice, balance plate and bracket are
clear Plugged areas will cause heat buildup and destroy the
magnets Also check the drilled passageways in the head and
idler pin to be sure they are clear
1. If the casing was removed from the bracket, place the
O-ring into the groove on back mounting face of casing
(side closest to the hole for the locating pin), and carefully
slide the casing onto the pilot of the bracket and install
capscrews Install the locating pin into the casing
2. Place the balance plate into the casing bore with grooved
side out Orient the groove toward the discharge port
Push to the bottom of the casing Line up the notch in
plate with the pin projecting through the casing bore
3. Insert the shaft gently into the inner bushing bore and
push through until rotor is up against the balance plate
4. If the old head gaskets are not reusable, refer to Gasket
Table figure 18 Otherwise, place all head gaskets on
the head Proper placement of the head is achieved by
the correct number of gaskets Improper placement will
adversely affect the operation of the pump The Gasket
Table shows the recommended end clearance and
itemizes the content of gaskets in a set The O-ring is the
primary seal and should be installed onto the head pilot
after the proper gaskets have been put in place
5. Coat the idler pin with suitable lubricant and place the
idler on the idler pin in head
6. The head can now be assembled on the pump Tilt the
top of the head away from the pump slightly until the
crescent enters the inside diameter of the rotor and rotate
the idler until its teeth mesh with the rotor teeth Line up
mark on head and casing, which were previously marked
to insure proper reassembly Be sure idler pin, which
is offset in pump head, is positioned toward and equal
distance between port connections to allow for proper flow
of liquid through pump Tighten the head capscrews (or
nuts onto studs in the Q size) Check the end clearance
using a feeler gauge as illustrated See figure 20 on
page 10 If end clearance is not correct, refer to section
on ADJUSTING HEAD GASKET END CLEARANCE on
page 10
7. Install relief valve if provided and removed
8. Install the snap ring onto the shaft (not required on Q
size) Apply a lubricant to the canister O-ring and place
into the face groove in the bracket