Viking Pump TSM270.2: RL 16 and 25 High Pressure - Manual (Page 8)

SECTION TSM 270.2 ISSUE A PAGE 8 OF 12 SECTION TSM 270.2 ISSUE A PAGE 9 OF 12
1. Remove the pump head if it is not already off.
2. Remove the pipe plugs from the bracket and loosen the
setscrews on the bearing housing.
3. Using the pin-style spanner wrench, turn the bearing
housing counter clockwise (as viewed from shaft end),
until the lobe is touching the bottom of the casing bore.
4. Using a depth micrometer, measure the depth from the
front face of the casing to the face of the lobe; this is the
total end clearance.
5. Multiply total end clearance by 0.6. Turn the bearing
housing clockwise until the lobe is this distance from the
front face of the casing.
6. Evenly tighten the bearing housing setscrews on both
sides of the bracket and reinstall the pipe plugs.
7. Repeat this procedure for the other lobe.
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, 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.
4. That the timing gearbox to cool before handling
the pump. The oil will become very hot during
normal operation. Allow the timing gearbox oil.
Failure to follow above listed precautionary mea-
sures may result in serious injury or death.
Caution:
The end clearance must be set while turning the
bearing housing assembly clockwise. If it is set
while turning counter-clockwise, the lobes may float
and cause damage or galling.
THRUST BEARING ADJUSTMENT
Caution:
Recheck to make sure locknuts are tight. If left
loose, the end clearance may be lost, resulting in
pump seizure.
1. If the casing or head bushings are worn or grooved,
install new bushings. Refer to INSTALLATION OF PEEK
BUSHINGS, page 9. Head bushings are not generally
field replaceable. If these bushings are worn or grooved,
consult the factory or you local distributor.
2. Coat the bottom casing bushing bore with light oil, then
gently slide the driven lobe/shaft assembly (shorter shaft)
into place. Hold the shaft as horizontal as possible when
installing; this helps to avoid damaging the bushing
when the step on the shaft slides into the bushing bore.
Slide the lobe/shaft assembly all the way into the casing.
Repeat this process with the driver lobe/shaft assembly,
again being careful not to damage the bushing on the
shaft’s multiple steps.
3. Establish the initial shaft placement to accept the timing
gears. Position the shafts so the keyway for the driver
timing gear will be located at 6 o’clock and the driven at 3
o’clock as viewed from the input end of the shaft.
4. Install the head with the capscrews – this is a temporary
installation, but capscrews must be tight to properly set
running clearance in a later step. Make sure the head is
positioned properly over the locating pin.
5. To install the cartridge mechanical, lubricate the seal ID
and pump shaft with an appropriate lubricant. Slide the
cartridge mechanical seal onto the shaft until the gland
contacts the stuffing box face.
NOTE:General installation instructions for other sealing
options are located on page 5.
6. Assemble the bracket to the casing, and torque the
capscrews evenly per Table 2.
7. Refer now to Figure 8 on page 7. The bearing housing
should already be assembled; if not see BEARING
HOUSING ASSEMBLY. Install the O-rings onto the
bearing housings; apply a lubricant to the o-ring to
ease installation. Pack the bearings with a heavy-duty
multi-purpose grease. Thread the bearing housing into
the bracket on the lower shaft. Repeat for the upper
bearing housing. Rotate each bearing housing assembly
clockwise until the lobes hit the pump head, then back
them off 1⁄4 turn.
8. Apply a liberal coating of anti-seize or lubricating
compound on the area of the shaft underneath the
timing gear. Insert the keys into the shaft keyways.
Install the timing gears, positioned as shown in Figure
9, with arrows meshed. Rotate the driver shaft by hand,
to be sure the timing gears are properly aligned. If not,
WARNING:
Do not use the circulation tubing to lift the pump or
casing. Make sure the casing is secured to a work
bench or other stable work surface before working
on the pump.
PUMP ASSEMBLY