Procedure 7.7 - Replacing a Pillow Block Bearing
Warning:
Care must be taken when work is being performed in the area of the stairarms. Pinch
points exist between the stairarm and ramp and between the stairarm and crankarm, when the
rear covers are removed.
Procedure
1.
Set the on/off switch in the off position, then unplug the power cord from the A.C. outlet.
2.
Remove the top, left and right cover sections as described in Procedure 7.1.
3.
Remove both stairarm assemblies per Procedure 7.17.
4.
Remove the crankarm from the same side as the pillow block bearing that you are replacing.
5.
Mark the current position of the step up belt tension bolts and the position of the idler pulley
mounting bolt in its adjustment slot with a pen or white out. This will enable you to recreate
the existing tension settings later in this procedure. See Diagram 5.3.
6.
Remove tension from the input pulley and step-up pulley belts as described below:
a.
Loosen the idler pulley axle bolt and turn the input belt tensioner adjustment nuts coun-
terclockwise until tension is removed from the input belt. (See Diagram 5.3).
b
Straighten the locking tabs and turn the left and right tension bolts counterclockwise until
tension is removed from the step up belt. (See Diagram 5.3).
c
Slide the input and step up belts off of their pulleys.
7.
The pillow block bearing will have manufacture’s information stamped into one side of the
pillow block bearing’s housing. The two pillow block bearings must be mounted so that one
pillow block bearing has the stamping on the topside and one pillow block bearing has
stamping on the bottom side. Note the orientation of the stamping on the pillow block
bearing that you are replacing. See Diagram 7.5. Remove the pillow block mounting bolts
that fasten the pillow block bearing to the drive weldment upright. Remove the pillow block
bearing from the input pulley shaft and discard.
8.
Slide the replacement pillow block bearing onto the input pulley shaft with the orientation
noted in step 7.
9.
Thread and hand tighten the pillow block mounting bolts into the drive weldment upright.
Torque the pillow block mounting bolts to 120 inch pounds (10 foot pounds).
10. Tighten the right and left hand step up belt tension bolts and the idler pulley mounting bolt to
the settings marked in step 5.
11. Verify the tension of the belts per Procedure 5.2.
Summary of Contents for EFX EFX 5.23
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