Finish Thompson VKC22 Series - Manual (Page 3)

umn section and tighten to 70 in-lbs. of torque using the pat-
tern shown in figure 4. For pumps with PVDF hardware, a
Teflon
® thread lubricant must be used on all plastic threads
before each use. Insert the 5/16-18 x 3-1/4 PVDF bolts through
the housing and barrier. Install PVDF nut. Tighten the nuts
onto the bolts using the pattern shown in figure 4.
CAUTION: Do not tighten more than maximum torque of 25
inch pounds on all PVDF hardware.
Next install the three 5/8-11 x 4-3/4 PVDF bolts using the
same maximum torque setting. Tighten the discharge pipe
union nut.
4. Clamp or somehow secure the mounting plate (item 21) to a
table with the pump end down. Making sure the jackscrews
(item 13) are threaded all the way into the bearing housing
(item 12), carefully set the drive hub into the column assembly
until the jackscrews touch. Extended length models require
lowering the drive hub and lower bearing mount straight down
into the column section until the jackscrews make contact. To
be centered correctly, the four fingers on the lower bearing
mount must seat inside locating bore in base of the column.
Avoid pinching your fingers by gripping the top flange of the
bearing housing and keeping fingers away from the jackscrews.
Use the jackscrews to slowly lower the bearing housing into
the column section and remove the jackscrews. Install and
tighten the four bolts and washers that secure the bearing
housing to the column assembly.
5. If the motor was replaced, install and lubricate the motor adapter
flange o-ring (item 2) and bolt the flange (item 3) onto the mo-
tor using the correct hardware (items 4, 5, & 6). Install the
coupling half onto the motor shaft (see instructions on page 1,
step 3, under “Pumps Without Motors”).
6. The customer can choose to either lay the pump end on its
side and then install the motor, or place the pump end into the
tank prior to the motor installation. An overhead hoist of some
sort may be needed to install the motor.
7. Install the plastic coupling insert (item 11) onto the motor
coupling half on the motor shaft. Install the mounting plate o-
ring (item 14) into the o-ring groove on the mounting plate
and lubricate with a chemically compatible lubricant. Insert the
motor / motor adapter flange (items 1 & 3) into the top of the
pump. Note that the splines on the pump shaft coupling half
need to match up and seat into the coupling insert. Once the
coupling has seated, rotate the motor until it is orientated cor-
rectly (avoid locating electrical box by the discharge piping).
Insert and tighten the four bolts & washers (items 7, 8, and 9)
down through the motor adapter flange (item 3) into the mount-
ing plate.
8. Refer to the “installation” section in this manual if needed.
1. Align splines on the impeller into the impeller drive and
press together (protect the face of the thrust ring during
assembly).
2. With mounting plate down and the column section fac-
ing up, carefully install the impeller assembly onto the
barrier spindle (white ceramic post).
3. Install and lubricate the housing o-ring (item 18), and
place the impeller housing onto the pump. Align the dis-
charge and start the discharge union (do not tighten yet).
Using the correct hardware, bolt the housing to the col-
REASSEMBLY
Figure 4 Figure 4 Figure 4 Figure 4 Figure 4
3
Note: The slotted end of the bushing is always located on
and installed from the “bottom” of the impeller drive. The
recessed, splined end that the impeller is inserted into is
the “top” of the impeller drive.
2. To replace the bushing, place the impeller drive with the
recessed splined end(the top) face down on a clean flat
surface. Match up the flat on the bushing side with the
flat in the eye of the impeller drive and insert the bushing,
slotted face up, into the impeller drive. Gently push until
the bushing bottoms out. The bushing should be flush
with the impeller eye on the “top” side.
3. If replacement is necessary, the impeller thrust ring (item
17A) on the open impeller can be removed by gently pull-
ing the ring out of the impeller. The thrust ring on the
closed impeller must be removed by grasping the ring
with pliers and twisting the ring out.
4. To replace the thrust ring, match up the corresponding
flats on the thrust ring and the top of the impeller and
press into place.
Note: Protect the face of the thrust ring during installa-
tion with wood or plastic, and avoid tilting the ring.
1. To remove the bushing (item 16A), place the impeller drive
in an arbor press with the slotted end of the bushing fac-
ing down. Insert a 1” diameter plastic or wooden shaft
through the impeller eye and press the bushing out. See
figure 3.
3. If an arbor press is not available, use two slotted screw-
drivers to pry the impeller apart from the impeller drive.
There are two slots located 180° apart in the top of the
impeller drive. Insert the screwdriver tips into the slots
and pry them apart.
BUSHING AND THRUST RING REPLACEMENT
Figure 3 Figure 3 Figure 3 Figure 3 Figure 3
5
1
6
3
4
2