Grizzly G0641 - Manual (Page 35)

G0641 Double Miter Saw
-33-
Pneumatic System
Symptom Possible Cause Possible Solution
Hold-downs/blade
pivot
arms not
responding.
1. Air pressure not adequate.
2. Air regulator-lubricator or internal regulator
at fault.
3. Hold-down/main air cylinder at fault.
4. Hold-down/blade speed valve(s) at fault.
5. Air line pinched/clogged.
6. Sub/master valve is at fault.
7. Foot pedal actuator at fault.
1. Connect machine to an air supply of
70–90 PSI; adjust air regulator-lubricator and inter-
nal air regulator to 70 PSI.
2. Test/replace; adjust to 70 PSI.
3. Test/replace.
4. Test/replace.
5. Use Pneumatic System Diagram (
Page 38) to trace
air flow; check for pinched/clogged air line and air
flow at connections; clean/repair/replace as need-
ed.
6. Test/clean/replace.
7. Test/clean/replace.
Hold-downs not
securing workpiece
when cutting.
1. Hold-downs not properly adjusted.
2. Hold-downs not completely lowering before
blades begin cut.
3. Hold-down neoprene tips glazed or worn.
1. Properly adjust hold-downs for workpiece ( Page
19).
2. Correctly adjust hold-down and blade lowering
speeds ( Page 20).
3. Re-dress hold-down tips with fine grit sandpaper;
replace.
Hold-downs not
raising after cut.
1. Pneumatic limit switch at fault.
2. Master or sub-valve at fault. 1. Reposition/test/replace limit switch ( Page 35).
2. Test/replace.
Blade pivot arms not
raising after cut. 1. Master or sub-valve at fault.
2. Foot pedal actuator at fault. 1. Test/replace.
2. Test/replace.