Grizzly T10446 owner manual Service, Troubleshooting

SECTION 7: SERVICE

Troubleshooting

Symptom	Possible Cause		Solution
Tool will not start.	1. No power to the tool.		1.	Make sure		power circuit
				is adequate		and	providing
				power.
	2.	Fuse is blown or circuit	2.	Check/fix	loose		or	worn
		tripped.		wires and	shorts; replace
				fuse or reset circuit break-
				er.
	3.	Switch is at fault.	3.	Replace switch.
	4.	Carbon brushes are worn.	4.	Replace the carbon brush.
	5.	Motor is at fault.	5.	Replace motor.
Bit rotates slowly.	1. Too much pressure on the		1.	Apply medium pressure to
		hammer drill.		the drill; allow the bit to do
				the work.
	2.	Bit is dull/damaged.	2.	Sharpen/replace.
	3.	Inadequate power to the tool.	3.	Make sure power circuit is
				adequate and there are no
				shorts.
Bit is stuck in hole.	1. Tool turned OFF with bit still in		1.	Always remove the bit from
		hole.		the hole while it is still rotat-
				ing. Disconnect			tool	from
				power, disengage bit				from
				chuck, then remove the bit
				from the hole.
	2.	Bit is in contact with an item	2.	Always make sure that there
		other than masonry material.		are no foreign items in the
				area of drilling. Remove the
				bit from the hole as instruct-
				ed in Solution 1 above.
Gearbox becomes	1. Tool is overloaded.		1.	Reduce pressure on tool.
excessively hot.	2. Excessively long operational		2.	Allow the tool and operator
		cycle.		to rest.
	3.	Not enough gearbox lubrica-	3.	Re-lubricate the gearbox.
		tion.

-10- Model T10446 Heavy-Duty Hammer Drill