You will need -
- 8mm AF ring spanner
- flat bladed screwdriver
- small pliers or tweezers
- circlip pliers
- clean rag or kitchen paper
- lithium-based grease, such as Castrol LM
- 3-in-1 oil or similar
- lighter fuel or similar solvent
- toothpicks/matchsticks
Starting with the front bearing assembly, loosen the 8mm locknut.
Unscrew and remove the nose screw and locknut together.
Remove the circlip, using circlip pliers. The end plate will probably drop out.
Remove the spring, chamfered washer and spherical bearing. It may be necessary to hold the motor with the nose facing downwards and push the motor shaft forward, to make the bearing drop out.
Parts of the front bearing assembly - clean each part thoroughly with clean rag and a little lighter fuel. Then clean the bearing housing in the motor, using a matchstick or toothpick, to push the rag into the housing.
Coat one face of the spherical bronze bearing with grease, avoiding the hole through the middle.
Place the bearing back into the housing, with the greased side facing inwards.
Put one drop of oil on the end of the motor shaft, where it passes through the bearing.
Apply grease to the chamfered face of the washer.
Place the chamfered washer back into the bearing housing, with the chamfered (greased) side facing inwards. Then, grease the inside of the bearing housing.
Replace the spring, end plate and circlip. Ensure the circlip is correctly seated in its groove.
Grease the end of the nose setting screw and screw it loosely back into place, but do
NOT tighten it!
Turn the motor around and place another drop of oil at the rear of the front bearing, where the motor shaft passes through it. Push the plastic oil thrower disc towards, but not touching, the bearing.
Note the small gap between the plastic disc and the face of the bearing -
Moving on to the rear bearing, remove the two screws which secure the metal plate carrying the connector block, to the rear of the motor.
The grey nylatron plate will probably fall off the metal plate, as it is removed.
Withdraw the spring, chamfered washer and spherical bearing.
Parts of the rear bearing assembly. Clean all the parts and bearing housing, as before.
Repeat the same procedure as for the front bearing - i.e.
- grease one face of the spherical bearing and replace in the housing
- put one drop of oil on the motor shaft, where it passes through the spherical bearing
- grease the chamfered face of the washer and place back in the housing, chamfered side inwards
- grease the inside of the bearing housing
- replace the spring
The nylatron plate will most probably show signs of wear, as below, so reverse it, so that the unworn side faces the bearing assembly.
Replace the metal plate and screw it back into position.
Now, the nose setting screw must be adjusted...
MOTOR NOSE SCREW ADJUSTMENT PROCEDURETo adjust the motor nose screw, it is necessary to run the motor out of the deck. You will need to make up a mains cable (line cord) to connect the motor to the supply. This can be dangerous if done incorrectly!
Follow this procedure at your own risk and responsibility !!Keep both hands away from the terminal block area, whilst the power is on!
Do not hold the motor whilst making adjustments!
Prepare a 3-core cable, as shown below -
and connect to the motor as follows - wire colours shown are as used in EU - different colours will be used outside of the EU -
your responsibility to check!!
Brown = "Live" / "Hot"
Blue = "Neutral"
Green/Yellow = "Earth" / "Ground"
(note that the motor shown is wired for 230V operation)
Place the motor on a table or workbench. It may help to place it on a hollow box of some sort, as this will act as a sounding box and make it easier to hear the noise from the motor. Ensure the nose screw is screwed in so that resistance is
just felt - do NOT tighten it. Then, connect the supply and switch on.
Slowly and carefully turn the nose screw clockwise, until the noise from the motor begins to increase.
Then, loosen again and repeat to find the exact point at which noise
just starts to increase. Turn off the supply and disconnect.
Now, turn the screw 1/8 turn
anticlockwise. Hold the screw in this position with a screwdriver, whilst carefully tightening the locknut with an 8mm ring spanner. Ensure that screw does not move as the locknut is tightened!
It should be possible to move the motor shaft back and forth by approximately 2mm -
Finally, connect the motor to the supply again and check that it runs quietly.
