CAMCORP SWF with Externally Mounted Fan - Manual (Page 32)

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D. Work seal loose. Be careful to keep all metal or dirt particles from entering unit. Remove old sealing compound
from seal seat if it is present. Also remove burrs and sharp edges from shaft. Clean with rag moistened with solvent.
Do not use abrasive material on shaft seal contacting surface.
E. Protect seal lips when handling; seal leakage will result if these are damaged. If a seal with rubber coating
on the outside diameter (O.D.) is used, no sealant is necessary. If no rubber coating is on seal O.D., coat
seal cage bore with adhesive sealant. Coat seal lips with oil and carefully work seal into position. Before
sliding seal into position, protect seal lips from shaft keyway edges by wrapping shaft with plastic tape coated
with oil. Position garter spring toward the inside of the unit. Place a square faced pipe or tube against the seal
O.D. and drive or press seal until fully seated as shown in Figure 3. Do not strike seal directly.
F. For best performance, seat the seal square with shaft within .005" at 180°. Check with dial indicator as shown
in Figure 4, Page 3, or with a straight edge and feelers, or square and feelers. To straighten a cocked seal, place
tubing over the seal and tap the tube lightly at a point diametrically opposite the low point on the seal. Do Not
strike seal directly.
5. Bearings –
A. Wash all bearings per bearing manufacturers recommendations and then dry.
B. Inspect bearings carefully and replace those that are worn or questionable.
Note: Replacement of all bearings is recommended.
C. Use a wheel puller or press to remove worm shaft bearings. Apply force to inner race only – not to cage or outer
race.
D. Use a wheel puller or press to remove taper bearing inner races.
E. To replace tapered bearing inner races and all ball bearings, heat bearings in an oil bath or oven to maximum
of 290° F (143° C). Slide high speed shaft bearings onto the oiled shaft until seated against the shoulder or snap
ring of the shaft. Slide low speed shaft bearing onto the oiled shaft against the gear spacer.
F. Thoroughly coat all bearings with lubrication oil.
6. Worm, gear and shafts
A. Worm and high speed shaft – since all worms are integral with the high speed shaft, any wear or damage to the
worm will necessitate replacing both.
B. Press shaft out of bronze worm gear. To reassemble gear and low speed shaft, freeze shaft or heat gear. Do
not exceed 200° F (93° C). Insert key into the shaft keyway and press shaft into oiled gear bore.
Note:
It is advisable to replace both the worm and worm gear should either of the assemblies require
replacement.
UNIT REASSEMBLY
1. Preliminary
A. Check to see that all worn parts have been replaced, gear and bearings coated with oil and all parts cleaned.
Remove all foreign matter from unit feet. The feet must be flat and square with each other.
B. Before starting to reassemble reducer, clean old shims or replace with new shims of equal thickness.
2. High Speed Shaft (Worm Shaft) Assembly
C-Flange units 1.33 C.D. through 3.25 C.D.:
Lubricate Bearing Bores of Housing. Press bearing onto end of worm shaft flush to shoulder (or snap ring). Lock bearing
onto shaft with external snap ring. Insert shaft assembly from opposite motor end into housing until seated against shoulder
in bore. Lock shaft assembly into housing bore with internal snap ring. Coat outside diameter of stamped steel end cover
with adhesive sealant (except, if end cover is rubber coated DO NOT use sealant) and press into input bore opposite motor
flange until flush with housing.
C-Flange units 3.75 C.D. through 6.00 C.D.:
Apply adhesive sealant to both housing input faces. Sub-assemble the two bearing inner-races onto rear of worm shaft
and secure with lock nut and washers. Insert shaft assembly into rear bore of housing along with the first bearing outer-
race. With plastic hammer gently tap end of shaft until bearing outer-race is seated against shoulder in housing bore. If
a press is available, pressing the assemble in is preferable. Press the final bearing outer race in and install the rear seal
cage. Adjust end play per instructions below (Item 3C). Install motor flange.
Basic units 1.75 , 2.06, 2.37 and 3.25 C.D.:
Disconnect all power before adjusting units