Milnor M60SGH01AE, Manual

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SECTION 9B BMP 720012R/81106A
SERVICE=IDLERSHAFT BEARINGS
9B.3 HOW TO INSTALL NEW BEARINGS
9B.3.A.
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 leakoff 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, YOU MUST USE A FEELER GAUGE
TO MEASURE THE INTERNAL CLEARANCE IN THE BEARING. READ
THE SECTION “HOW TO ADJUST THE BEARING” BEFORE
INSTALLING THE BEARINGS IN THE HOUSING. DESCRIBED IN
“REMOVAL, INSTALLATION, AND SETTING MAIN BEARINGS AND
SEALS”.
9B.3.B. The “fixed” bearing is always installed first. 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. Pass the idlershaft
through the housings. Slip the bearing adapters on the shaft with the threaded
end of the adapter near the end of the shaft; next, pass the bearing over the shaft
and onto the tapered adapters. Hand tighten the locknut on the adapter, and
adjust the location of the end of the idlershaft assembly drawing.
9B.3.C. 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 idlershaft on both ends of the
machine. If the center distances are different, loosen the take-up units and
adjust the position of the shaft. It is important that the idlershaft 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.
9B.3.D. Tighten the bearing locknuts to the proper internal clearance using the procedure
explained in section entitled “HOW TO ADJUST THE BEARING”. (This
section describes adjustment of the main bearings which also applies to the
idlershaft bearing.)
9B.3.E. Loosen the three bearing housing mounting bolts, and put the covers on the
bearings as sown on the idlershaft assembly. Check to make sure bearing
housing mounting bolts are tight and don’t forget to lubricate the bearing before
operation. Follow the instructions for bearing lubrication as outlined in Section
7 of this manual.
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