Smithy GN1300 - Manual (Page 92)

Motor
How to check a Motor
Get a car battery and attach the two wires coming from the motor to the terminals of the
battery. If the motor runs, the motor is okay, if not it needs to be replaced.
Uncscrew brush caps and inspect the brush carbon, spring and wire. If damaged or worn
out replace it.
Chuck and Accessories
If the chuck does not seat properly.
Adjusting the chuck mounting studs
The D1-4 mounting system used on all Granite machines consists of three adjustable
studs mounted on the chuck and three rotating cam locks on the spindle flange. This is
a very fast and accurate method of chuck mounting; however, there are some
adjustments to be made to insure optimum fit and accuracy.
Removing the chuck
1. The first step in removing the chuck is to place a piece of wood on top of the machine
bed underneath the chuck. This will protect the bed if the chuck accidentally slips out of
your hand and falls onto the machine.
2. There is an alignment mark on each cam and on the spindle flange adjacent to each
cam. Using the chuck key, turn the cam counter clockwise until the two marks align with
each other as shown below.
3. Position all three cams in the unlocked position, put your right hand under the chuck
for support and tap the chuck with a block of wood to break it loose from the spindle.
Spindle
Flange
Unlocked
D1-4 Camlock
Tooling
Cam in Unlocked Position
Spindle
Flange
Locked
D1-4 Camlock
Tooling
Cam in Locked Position
Figure 12.1 D1-4 Lathe Chuck in Locked & Unlocked Position
12: Troubleshooting
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