Viking Pump TSM151.1: H-LL 123/4123 - Manual (Page 7)

SECTION TSM 151.1 ISSUE C PAGE 7 OF 13
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 12.
If 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.
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. 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 H and HL size pumps.
5. Carefully remove rotor and shaft to avoid damaging
bracket bushing.
6. Remove rotary member of seal from shaft and
stationary seal seat from bracket.
7. Loosen setscrews. Two for H and HL size pumps, four
for all other sizes. With spanner wrench remove both
end caps and lip seals. Remove ball bearing and
spacer collars. Refer to Figure 5, page 4.
8. Examine seal chamber lip seal and remove if it shows
wear or damage. Lip seal must be removed if bracket
bushing needs to be replaced.
9. 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.
10. Casing can be checked for wear or damage while
mounted on bracket.
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 ABOVE LISTED
PRECAUTIONARY MEASURES MAY RESULT IN
SERIOUS INJURY OR DEATH.