Viking Pump TSM343.1: Vi-Corr Mag Drive - Manual (Page 8)

TSM 343.1 ISSUE D PAGE 8 OF 13
GENERAL PUMP DISASSEMBLY
Before attempting to repair the pump, make sure that all the
details are covered in "TROUBLESHOOTING" on page 12
have been checked out because disassembling a good pump
should be avoided. Typically, due to the construction and
close tolerances in manufacturing the pump, repair is seldom
economically feasible unless it is an O-ring. Often, when
some internal parts such as a bushing, shaft or gear; this will
cause excessive wear in other mating parts and generally
requires mare components to rebuild back to original
condition than expected at first.
Replacement parts are only available as displayed in the
table of parts. Contact your local distributor to obtain
replacement parts. Be sure to supply the pump model
number and serial number.
Mark all sections of the pump before disassembly to make
sure they will be assembled in the proper order and
orientation.
RP-805 SERIES PUMP
DISASSEMBLY
1. Remove key from driver shaft.
2. Remove the 6 assembly capscrews.
3. Hold the casing of the pump and gently tap on the sides
of the pump bracket with a soft hammer, alternating sides
of pump. This should slowly separate the sections. Do not
hit the sections hard or use a screwdriver to pry them
apart as this may damage the mating surfaces.
4. After pump is apart, inspect all parts for signs of wear.
Look carefully at the shaft, bushings, inside of casing,
gear teeth, spacer plate, and the inside face of the casing
for signs of wear.
5. If replacing shafts, remove retaining rings from both sides
of gear. Press gear off shaft and remove drive pin(s) or
balls from shaft.
6. Visually inspect the pump O-rings. If the O-rings are
Teflon® (appear to be white), it strongly recommended to
replace rather than reuse. Do not remove the bracket O-
ring unless planning to replace, especially if it is an
encapsulated O-ring.
7. If pump has relief valve, remove the acorn nut covering
the relief valve adjusting screw. Measure the distance of
the relief valve adjusting screw to the pump surface and
record this length. Finish disassembling relief valve and
inspect the seat in the casing and the poppet for signs of
wear or foreign matter on either surface.
RP-805 SERIES PUMP ASSEMBLY
• The pump is ready to be reassembled after all parts
have been changed and worn parts replaced.
• Use a suitable lubricant compatible with the fluid being
handled when reassembling the pump.
• Make sure all holes machined in the bracket are clean
and that the mating surfaces of each section are free of
any dents or burrs.
1. Lubricate bushings in casing.
CLOCKWISE PUMP SHAFT ROTATION -
Place the driven gear and shaft into the casing gear bore
opposite the notch in casing face.
COUNTER-CLOCKWISE PUMP SHAFT ROTATION -
Place the driven gear and shaft into the casing gear bore
nearest the notch in casing face.
Place driver gear and shaft in remaining casing bore.
2. Lubricate exposed shafts and gears. Install spacer plate
into casing bore ensuring tab on spacer plate fits into
notch in casing. Place O-ring into O-ring groove in casing.
3. Place separation plate on casing with O-ring groove
facing away from casing. Place O-ring into O-ring groove
in separation plate.
4. Install the bracket O-ring. If it is encapsulated (purple or
orange appearance) then follow the special instructions
below.
Do not attempt to reuse this type of O-ring if it has been
removed. Immerse a new O-ring in boiling water for a few
minutes. Remove from water and stretch out in hands a
little larger so it will fit onto the bracket hub, without
forcing over a sharp edge. When in place, run hot water
over O-ring until it shrinks down tight into the hub O-ring
groove. Dry area with compressed air.
5. Check driver shaft keyway for burrs and removed any if
found. Slide bracket over shaft.
6. Install the 6 capscrews and tighten with torque wrench to
7-8 ft-lbs.
PAGE 8 Of 13 ISSUE C SECTION TSM 343.1
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.