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Grizzly G0709 Owner's Manual: Section 7: Service

14" x 40" gunsmithing lathe.
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Review the troubleshooting and procedures in this section if a problem develops with your machine. If you
need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663.
Note: Please gather the serial number and manufacture date of your machine before calling.
Motor & Gearbox
possible Cause
Motor will not
1. stop button not reset.
2. Main power panel switch is OFF.
3. Circuit breaker or fuse has tripped.
4. no voltage or open connection.
5. Capacitor is at fault.
6. spindle on/oFF switch is at fault.
7. power switch or magnetic contactor is at
8. Motor is at fault.
Fuses or circuit
1. short circuit in power cord or plug.
breakers trip
2. short circuit in motor or loose connections.
3. incorrect fuses or circuit breakers in power
Machine is
1. excessive depth of cut.
loud; belt slips
2. rpM or feed rate wrong for operation.
when cutting.
overheats or
3. dull bit.
bogs down in the
4. Belt is slipping.
5. Belt is at fault.
gear change
1. gears not aligned in headstock.
levers will not
shift into position.
loud, repetitious
1. pulley set screws or keys are missing or
noise coming
from machine
2. Motor fan is hitting the cover.
at or near the
Model G0709 (Mfg. Since 5/11)
possible solution
1. reset stop button.
2. turn the main power panel switch ON.
3. seek an electrician to troubleshoot and repair the
power supply.
4. test circuit, replace wires and connections as
required (refer to Wiring, page 74).
5. replace capacitor.
6. replace switch.
7. replace power switch or magnetic contactor.
8. replace motor.
1. inspect cord or plug for damaged insulation and
shorted wires, repair or replace as required.
2. inspect all connections on motor for loose or
shorted terminals or worn insulation. repair as
required (refer to Wiring, page 74).
3. install correct fuses or circuit breakers.
1. decrease depth of cut.
2. refer to rpM feed rate chart for appropriate rates,
(page 41).
3. sharpen or replace bit.
4. remove grease or oil on belt tighten belt adjustment
(page 70).
5. replace belt.
1. rotate spindle by hand until gear falls into place.
1. inspect keys and set screws. replace or tighten if
2. replace fan and cover as required.


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