Vilter VSM 71-701 Operation And Service Manual Download

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INSTALLATION OF CARBON
GRAPHITE BUSHINGS

When installing carbon graphite bushings, extreme care
must be taken to prevent breaking. Carbon graphite is a
brittle material and easily cracked. If cracked, the bushing
will quickly disintegrate. Using a lubricant and adding a
chamfer on the bushing and the mating part will help in
installation. The additional precautions listed below must
be followed for proper installation:

A press must be used for installation.

Be certain bushing is started straight.

Do not stop pressing operation until bushing is in

proper position, starting and stopping will result in a
cracked bushing.

Check bushing for cracks after installation.

THRUST BEARING ADJUSTMENT

See Figures 9 and 10.

Loosen two screws in face of thrust bearing assembly.

If shaft cannot be rotated freely, turn thrust bearing
assembly counterclockwise until shaft can be turned
easily.

To set end clearance:

While turning rotor shaft, rotate thrust bearing

assembly clockwise until noticeable drag occurs.
This is zero end clearance.

Mark position of bearing housing with respect to the

casing.

Rotate thrust bearing assembly counterclockwise the

distance listed below as measured on outside of
bearing housing.

Tighten two setscrews in face of bearing housing

after adjustment is made to secure thrust bearing
assembly position.

For viscosities above 2500 SSU, add additional end
clearance (0.004” for GG, HJ and HL size pumps
and 0.005” for AS, AK and AL size pumps).

DANGER

BEFORE STARTING PUMP, BE SURE ALL
DRIVE EQUIPMENT GUARDS ARE IN PLACE.

FAILURE TO PROPERLY MOUNT GUARDS
MAY RESULT IN SERIOUS INJURY OR DEATH.

12.

Pack inner ball bearing with multi-purpose grease,

NLGI #2.

GG, HJ, HL:

Install bearing in casing with sealed side

towards head end of pump. Drive the
bearing into the bore. Tap the inner race
with a brass bar and lead hammer to
position bearing.Install inner snap ring.

AS, AK, AL:

Install bearing retainer washer over the

shaft before installing ball bearing. Install
ball bearing in casing with sealed side
towards head end of pump. Drive the
bearing into the bore. Tap the inner race
with a brass bar and lead hammer to
position bearing.

13. GG, HJ, HL:

Install shaft snap ring in groove in the

shaft. See Figure 9.

AS, AK, AL:

Install bearing spacer over shaft and

against single row ball bearing. See
Figure 10.

14.

Pack lubrication chamber between inner ball bearing

and double row ball bearing in the thrust bearing
assembly approximately one-half full of multi-purpose
grease, NLGI #2. The thrust bearing assembly will take
the remaining space. See Figure 9 and 10.

15.

Pack double row ball bearing with multi-purpose

grease, NLGI #2.

GG, HJ, HL:

Install ball bearing into bearing housing

with shield side toward coupling end of shaft. See
Figure 9. Install snap ring into bearing housing to
retain ball bearing. This snap ring has a tapered edge
to fit tapered groove in bearing housing. The tapered
edge is located away from ball bearing.

AS, AK, AL:

Install ball bearing into bearing housing.

Install lip seal in bearing housing end cap. The lip
should face towards end of shaft. Put bearing spacer
collar in lip seal and install in bearing housing and
tighten set screws securely. See Figure 10.

16.

Insert brass bar or hardwood through port opening
between rotor teeth to keep shaft from turning.

17.

Start thrust bearing assembly into casing. Turn by
hand until tight. This forces rotor against head.
Replace and tighten locknut or shaft.

18.

Remove brass bar or hardwood from port opening.

19.

Adjust pump end clearance, refer to page 7.

Pump Size

Distance In Inches On

O.D. Of Bearing Housing

End