DISTRIBUTION MAINTENANCE BULLETIN B22MB91028
01234567-5-123X567X9LM
October 5, 1990


SUBJECT: HOW TO REMOVE AND INSTALL ELECTRIC CLUTCHES FROM TAPERED MOTOR SHAFTS

Dear MILNOR Dealer/Customer:

We have recently changed the design on some of our motor shafts by increasing the length of the taper on which the clutch is mounted. Due to this change, it is no longer possible to remove the clutch from the motor shaft using 5/8" push-off bolts. Below are suggestions on how to remove these electric clutches. Of course, the new methods are not as convenient as the 5/8" push-off bolt, but we fell that the additional engagement of the motor taper to the clutch is worth a minor inconvenience in clutch removal.

In the case of 36021, 36026 and 42026RWE/P and M5/6, G/J/P, series machines, we have Loctited the clutches onto the motor shaft. This is to accommodate the high torque required to accelerate the machine to wash and drain speed. To remove the clutch, we have found it advantageous to heat the clutch and shaft using a propane torch in order to loosen the Loctite. Along with some method of prying the clutch rotor from the motor shaft, the clutch is relatively easy to remove.

The use of a gear puller to remove the clutch is probably the "safest" method to remove the clutch. In addition, we have used two wooden wedges between the clutch rotor and the motor end bell to force the clutch form the motor shaft. CAUTION: Be sure not to place the wood wedge behind the coil.

WHEN USING THE PROPANE TORCH, HEED THE FOLLOWING ADVICE: MAKE SURE TO CONCENTRATE HEAT ON THE SHAFT AND NOT ON THE BEARING OF THE CLUTCH. ALSO, TRY TO HEAT THE SHAFT FOR AS SHORT A PERIOD AS POSSIBLE - EXCESSIVE HEAT WILL DESTROY THE CLUTCH BEARING SEAL, CAUSING PREMATURE FAILURE. WHEN THE LOCTITE IS HEATED TO ITS MELTING POINT, THE CLUTCH WILL "POP OFF" WHEN TAPPED WITH A PLASTIC HAMMER. EXCESSIVE FORCE FROM THE HAMMER COULD DAMAGE THE CLUTCH ROTOR.


******How To Install Electric Clutches For 36 & 42 RWE/P, M5-6/G-J-P Machines******

If the field (coil) was removed, reinstall before proceeding.

1. Make sure the surface of the tapered shaft on the motor and clutch are clean.
2. File off any burrs or high spots.
3. Spray the matting surfaces with Loctite activator (primer) and wipe clean.
4. Spray again and let dry - DO NOT WIPE. This acts as a surface preparation for the Loctite.
5. Apply a small amount of Loctite "680" to the tapered surface of the shaft and clutch.

CAUTION: You have approximately 30 seconds from the time you place the Loctite "680" on the shaft until it starts to take a set.

6. Place the clutch on the shaft.
** 7. Using the washer and bolt, secure the clutch to the motor, tightening the bolt to 300 inch lbs with a torque wench.**
8. Do not move the motor. Allow the motor to sit for five (5) minutes to let the Loctite harden.
9. You can mount the motor on the motor base plate after 5 minutes, bu t do not place belts on motor or run motor for thirty (30) minutes. This allows the Loctite to fully cure.

Yours truly,

PELLERIN MILNOR CORPORATION

Terrence J. Doyle
Warranty Administrator

TJD/das