Viking Pump TSM151.2: LS-M 123/4123 - Manual (Page 8)

PAGE 8 OF 14 ISSUE B SECTION TSM 151.2
DANGER
BEFORE OPENING ANY VIKING PUMP
LIQUID CHAMBER (PUMPING CHAMBER,
RESERVOIR, RELIEF VALVE ADJUSTING
CAP FITTING, ETC.) BE SURE:
1. THAT ANY PRESSURE IN CHAMBER
HAS BEEN COMPLETELY VENTED
THROUGH 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 THE ABOVE LISTED
PRECAUTIONARY MEASURES MAY
RESULT IN SERIOUS INJURY OR DEATH.
DISASSEMBLY
1. Mark head and casing before disassembly to insure
proper reassembly. The idler pin, which is offset in
pump head, must be positioned toward and equal
distance between port connections to allow for proper
flow of liquid through pump.
Remove head from pump. Do not allow idler to fall
from idler pin. Tilt top of head back when removing to
prevent this. Avoid damaging head gasket. If pump is
furnished with pressure relief valve, it need not be
removed from head or disassembled at this point. Refer
to PRESSURE RELIEF VALVE INSTRUCTIONS, page
13.
If LS pump has jacketed head plate, it will separate from
head when it is removed. The gasket between head and
jacket head plate must be totally removed. Use new
gasket when assembling pump. Q, QS and M pumps
have jacketed plate welded to head.
2. Remove idler and bushing assembly.
3. Insert length of hardwood or brass through port opening
between rotor teeth to keep shaft from turning. Bend up
tang of lockwasher and with a spanner wrench remove
locknut and lockwasher from shaft.
Remove length of hardwood or brass from port opening.
4. Standard Mechanical Seal (synthetic rubber bellows
type) uses a set collar behind the seal spring. Two
setscrews must be loosened before shaft can be
removed Access to collar setscrews is through seal
access hole on right-hand side of mounting bracket
(viewed from shaft end. Refer to Figure 5.)
5. Tap shaft forward approximately 0.50 inch and remove
pair of half round rings under inner spacer collar. There
is no pair of half round rings on Q, QS and M size
pumps. Refer to Figure 6.
6. Carefully remove rotor and shaft to avoid damaging
bracket bushing.
7. Remove seal holder and seal holder plate.
8. The seal seat and rotary member of the seal can now
be removed from the side opening of bracket.
9. Loosen the four setscrews over the outer and inner end
caps. Remove both end caps, spacer collars and ball
bearing. Refer to Figure 6. The inner end cap can be
removed through the side openings in the bracket.
10. Clean all parts thoroughly and examine for wear or
damage. Check lip seals, ball bearing, bushing and
idler pin and replace if necessary. Check all other parts
for nicks, burrs, excessive wear and replace if
necessary.
Wash bearings in clean solvent. Blow out bearings with
compressed air. Do not allow bearings to spin; turn
them slowly by hand. Spinning bearings will damage
race and balls. Make sure bearings are clean, then
lubricate with non-detergent SAE 30-weight oil and
check for roughness. Roughness can be determined by
turning outer race by hand.
Be sure shaft is free from nicks, burrs and foreign
particles that might damage bracket bushing. Scratches
on shaft in seal area will provide leakage paths under
mechanical seal.
11. Casing can be checked for wear or damage while
mounted on bracket.