Milnor 42044SR2, Механические детали и сервисное обслуживание

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Pellerin Milnor Corporation
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If only the clean side bearing must be changed, however, the soiled-side bearing should be re-
moved first (hydraulically) before the clean side bearing is mechanically removed. If it is not re-
moved first, minute indentations, invisible in most cases, will be formed on the inner and outer
races of the soil side bearing rendering it unserviceable.
When both bearings must be changed the order of bearing removal is not critical.
How To Install New Bearings
BNWG4M01.T02 0000279242 A.3 A.2 3/20/20 10:26 AM Released
NOTICE: The most important ingredient in successful bearing and seal installation is
cleanliness . The bearing housing must be free of all foreign matter. The grease and leak-
off passages must be blown clear and all foreign matter removed. You must have a clean
work area. Keep your hands and tools free from grit and grime. (Wash your hands before
actually inserting the bearing in the housing.)
Foreign matter is, without doubt, the most
frequent cause of bearing failure, and one over which the manufacturer has no control.
Before installing bearings, use a feeler gauge to measure the internal clearance in the bearing.
Read the section “Measuring Unmounted Clearance and Setting Bearing (Front or Rear)” before
installing the bearings in the housing, found in “Main Bearing and Seal Replacement for Divided
Cylinder Machines”. (This section describes adjustment of the main bearings which also applies
to the idler shaft bearing.)
1. The “fixed” bearing is always installed first.
a. Install the bearing housings in the take-up units with three mounting bolts. Don’t put the
bearing covers on the housings; however, make sure the mounting bolts are tight.
b. Pass the idler shaft through the housings.
c. Slip the bearing adapters on the shaft with the threaded end of the adapter near the end of
the shaft.
d. Next, pass the bearing over the shaft and onto the tapered adapters.
e. Hand tighten the locknut on the adapter, and adjust the location of the end of the idler
shaft assembly drawing.
2. With both bearings on the shaft and in the housing, measure the distance from the center of
the main shaft to the center of the idler shaft on both ends of the machine. If the center distan-
ces are different, loosen the take-up units and adjust the position of the shaft.
It is important that the idler shaft be parallel to the main shaft before setting the bearings, so
that the plane of rotation of the rollers is approximately in the same plane with the bearing
races; further, if the shaft is cocked, the floating bearing will not be located accurately from
the face of the bearing housing as shown on the assembly drawing.
3. Tighten the bearing locknuts to the proper internal clearance using the procedure explained in
section entitled “How To Adjust The Bearing”.
4. Loosen the three bearing housing mounting bolts, and put the covers on the bearings as shown
on the idler shaft assembly. Check to make sure bearing housing mounting bolts are tight.
5. Lubricate the bearing before operation. Follow the instructions for bearing lubrication as out-
lined in section “Tightening Bearing(s) (Front and/or Rear)” found in “Main Bearing and Seal
Replacement for Divided Cylinder Machines”.
Bearing Assemblies