Milnor 42044SR2, Механические детали и сервисное обслуживание

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Pellerin Milnor Corporation
77
Removing the Bearing Housing (Bearing and Seal Carrier),
Seal Sleeve, and Seals (Front or Rear)
BNWVUM02.T02 0000278618 A.3 A.5 3/12/20 11:54 AM Released
These procedures require the use of a pulling fixture and guide rods available from the Milnor ®
factory. With the bearing cover (or shaft seal holder) and the bearing removed, proceed as
follows:
1. Remove the three bearing housing cap bolts and the grease lines from the bearing housing
front plate. Install guide rods in two of the bolt holes, as shown in Figure 27 .
2. Install the pulling fixture as shown in Figure 28 , by placing each of the four threaded rods
through a hole in the steel plate with hexnuts to the outside of the plate then screwing each
rod into the appropriate tapped hole in the bearing housing (same holes as used to mount the
bearing cover or shaft seal holder).
Figure 27. Two Bearing Housing Guide Rods
in Position
Figure 28. Bearing Housing Pulling Fixture in
Position
NOTE: Step 2a or 2b below will cause the bearing housing to slide away from the
shell. Shims were placed under one or more of the three bearing housing pads during
factory assembly to align the housing and insure its being exactly parallel with the
shaft.
When removing the bearing housing, be sure to keep these shims separate
and identified so that they may be returned to their proper location, otherwise
the bearing and seal will be out of line and may be damaged after a short operat-
ing period.
As a precaution in case the shims are lost during disassembly, you will
find stamped next to the bearing housing the proper thickness of shims required (if
any) under each adjacent bearing housing pad. The stamped number indicates the shim
thickness in thousandths of an inch. For example, the number “38” indicates that 38/
1000 (.038") shims would be required under this pad.
a. Tighten all four hex nuts on the threaded rods such that the pulling fixture plate is pressed
against the shaft end. With an impact wrench, tighten down on the center bolt until the
housing slides out, or
b. If no impact wrench is available, simply continue to tighten down on each of the four hex
nuts behind the pulling fixture plate, alternately and progressively, until the housing slides
out. It may be necessary to place a spacer (approx. two inches long) between the plate and
the shaft to provide enough clearance between the plate and the bearing housing.
Bearing Assemblies