Viking Pump TSM710.1: HLE-ALE 4076/4176 - Manual (Page 4)

DANger !
before opening any viking pump liquid
chamber (pumping chamber, reservoir,
relief valve adjusting cap fitting, etc.)
be sure:
1. That any pressure in the chamber has
been completely vented through the
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.
DiSASSeMbLy
1. Remove the head capscrews. Remove the head of the
pump. Do not allow the idler to fall from the idler pin.
To prevent this from happening, tilt the top of the head
back when removing. Avoid damaging the head o-ring.
f the pump is furnished with a jacketed head plate, it will
separate from the head when the capscrews are removed.
Avoid damaging the jacketed head plate o-ring.
2. Remove the idler and bushing assembly.
3. Insert a length of hardwood or brass through either port
opening between the rotor teeth to keep the shaft from
turning. Remove the lock nut using a standard open end
wrench.
4. Loosen the two setscrews in the face of the bearing
housing and unthread the bearing housing assembly
from the bracket. The end of the bearing housing
contains the mechanical seal seat. Avoid damaging this
surface. See figure 4.
5. Remove the rotor and shaft assembly being careful to
avoid damaging the mechanical seal face and casing
bushing.
6. Remove the rotating member of the mechanical seal
from the shaft only if the seal is to be replaced.
1. Install the casing bushing. See “iNSTALLATiON Of
CArbON grAPHiTe buSHiNgS” on page 6.
2. Apply a light coating of oil onto the shaft in the seal area.
install the rotating member of the mechanical seal onto
the rotor and shaft assembly. Slide the seal all the way
to the shoulder on the shaft.
3. Slide the rotor and shaft assembly into the casing, taking
care not to damage the bushing or the mechanical seal
face.
NOTe: When installing a new rotor and shaft assembly, use
a file to carefully remove all burrs and sharp edges.
4. Coat the head o-ring with oil or grease and slip it over
the head pilot to keep it in place. Apply a coating of light
oil onto the bushing inside diameter and the crescent.
Place the idler and bushing assembly onto the idler pin.
NOTe: When installing a new head and pin assembly, use a
file to carefully remove all burrs and sharp edges, especially
around the loading groove.
5. Install the head. For proper head positioning, the pin
should be at the top centered between the two ports. If
the pump is equipped with a jacketed head plate, make
sure the o-ring is in place and install at this time. Tighten
the capscrews evenly.
Refer to figure 4 for bearing housing assembly.
6. Install the lip seal in the bearing housing. See figure 4
for lip orientation.
7. Pack the ball bearing with grease and push or press the
bearing into the bearing housing.
ASSeMbLy
NOTe: To facilitate assembly, place the pump casing so that
it is standing on one of its flanges with a block of wood under
the mounting flange. See figure 5.
SECTION TSM 710.1 ISSUE C PAGE 4 OF 8
figure 4
figure 5