Grizzly g4003g Owner's Manual page 41

operation and Work results
symptom possible Cause
Entire machine 1. Workpiece is unbalanced.
vibrates
excessively upon 2. Worn or broken gear present.
startup and while 3. Chuck or faceplate has become unbalanced.
running.
4. spindle bearings at fault.
Cutting tool 1. tool holder not tight enough.
or machine 2. Cutting tool sticks too far out of tool holder;
components lack of support.
vibrate 3. gibs are out of adjustment.
excessively 4. dull cutting tool.
during cutting. 5. incorrect spindle speed or feed rate.
Can't remove 1. Quill had not retracted all the way back into the
tapered tool from tailstock.
tailstock quill. 2. debris was not removed from taper before
inserting into quill.
Cross slide, 1. gibs are out of adjustment.
compound rest, 2. handwheel is loose.
or carriage 3. lead screw mechanism worn or out of
feed has sloppy adjustment.
operation.
Cross slide, 1. gibs are loaded up with shavings or grime.
compound rest,
or carriage feed 2. gib screws are too tight.
handwheel is
hard to move. 3. Backlash setting too tight (cross slide only).
4. Bedways are dry.
Bad surface 1. Wrong rpM or feed rate.
finish. 2. dull tooling or poor tool selection.
3. too much play in gibs.
4. tool too high.
inaccurate 1. headstock and tailstock are not properly
turning results aligned with each other.
from one end of
the workpiece to
the other.
Chuck jaws won't 1. Chips lodged in the jaws.
move or don't
move easily.
Carriage won't 1. gears are not all engaged or broken.
feed, or hard to 2. gibs are too tight.
move. 3. loose screw on the feed handle.
4. lead screw shear pin has sheared.
tailstock quill will 1. Quill lock lever is tightened down.
not feed out of
tailstock.
Model g4003g (Mfg. since 4/08)
troubleshooting
possible solution
1. reinstall workpiece so it is as centered with the
spindle bore as possible.
2. inspect gears and replace if necessary.
3. rebalance chuck or faceplate; contact a local
machine shop for help.
4. tighten or replace spindle bearings.
1. Check for debris, clean, and retighten.
2. reinstall cutting tool so no more than
length is sticking out of tool holder.
3. tighten gib screws at affected component.
4. replace or re sharpen cutting tool.
5. use the recommended spindle speed.
1. turn the quill handwheel until it forces taper out of
quill.
2. Always make sure that taper surfaces are clean.
1. tighten gib screw(s).
2. tighten handwheel fasteners.
3. tighten any loose fasteners on lead screw
mechanism.
1. remove gibs, clean ways/dovetails, lubricate, and
readjust gibs.
2. loosen gib screw(s)
bedways.
3. slightly loosen backlash setting by loosening the
locking screw and adjusting the spanner ring at the
end of the handle.
4. lubricate bedways and handles.
1. Adjust for appropriate rpM and feed rate.
2. sharpen tooling or select a better tool for the
intended operation.
3. tighten gibs.
4. lower the tool position.
1. realign the tailstock to the headstock spindle bore
center line.
1. remove jaws, clean and lubricate chuck threads,
and replace jaws.
1. Adjust gear positions or replace.
2. loosen gib screw(s) slightly.
3. tighten.
4. Correct for cause of shear pin breakage, and replace
shear pin.
1. turn lever counterclockwise.
⁄ of the total
1
3
slightly, and lubricate
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