Removal of Worm Shaft and Supporting Bearings (fig. 6-1).
Remove the fan housing (28) by removing four screws ;30) and washers (29). Remove the two locking
setscrews (25 and 26) from the fan hub and remove the fan (27).
Remove four capscrews (32) and bracket (31).
Remove bearing retainer shims (34).
Remove four capscrews (50) and bearing retainer (2).
Remove shim (49) and remove worm shaft (6) and bearings (4 and 7) as a unit.
Remove bearings (4 and 7) from the worm shaft (6) with a bearing puller.
Remove oil seal (1) and bearing cup (3) from bearing retainer (2).
Remove oil seal (24) and bearing cup (37) from bearing retainer (33).
Plugs (9, 15, 35, 36, 43, 45, 46, and 47) may be removed if necessary.
Four drive screws (44) may be removed with a chisel if the nameplate (48) must be removed.
Avoid heavy hammer blows when mounting couplings or gears on shaft extensions to
prevent damage to the speed reducer gears and bearings. When tight fits occur, preheat
these components in oil at 150F to 200F to expand bores.
Assure housing oil tightness by cleaning the housing joints and using an acceptable sealing compound on all
Obtain proper adjustment of the worm and gear shaft bearings. Hold axial end play to the limits shown in
c. Assure oil tightness along the shaft by replacing the oil seals with new oil seals. Follow installation nstructions
Press bearing cups (3 and 37) into bearing retainers (2 and 33), respectively.
Install worm shaft (6) into housing (38) and push in bearing retainers (2 and 33) with shims (34 and 49) and
secure with four capscrews (50), four capscrews (32) and bracket (31).
Install fan (27) and tighten alien setscrews (25 and 26).
Install fan housing (28) and secure with four screws (30) and washers (29).