Jet Tools J-7020, J-7040 operating instructions Replacement Parts, WMH Tool Group, Inc

20

Troubleshooting (Continued)

Blade is twisting	1.	Blade is binding in the cut.	1.	Decrease feed pressure.
	2.	Blade tension too high.
			2.	Decrease tension on blade
	1.	Blade guides worn	1.	Replace blade guides.
	2. Blade guide bearings not adjusted.
Unusual wear on			2.	Adjust	blade guide bearings.
side/back of blade	3.	Blade guide bearing bracket is
		loose.	3.	Tighten	blade guide	bearing
				bracket.
	1.	Blade tooth pitch too coarse for	1.	Use blade with finer tooth pitch.
		workpiece.
	2.	Feed too slow; feed too fast.	2.	Increase feed pressure and/or
Teeth missing/ripped	3.	Workpiece vibrating.		blade speed.
from blade			3.	Clamp workpiece securely.
	4.	Gullets loading up with chips.
			4a. Use blade with a coarse tooth
				pitch—reduce feed pressure.
			4b. Brush blade to remove chips.
	1.	Blade tension too high.	1.	Reduce tension on blade.
	2.	Drive belt tension too high.
			2.	Reduce tension on drive belt.
	3.	Blade too coarse for workpiece (es-
			3.	Use blade with fine tooth pitch.
Motor running too hot		pecially with tubular stock).
	4.	Blade too fine for workpiece (espe-	4.	Use blade with coarse tooth pitch.
		cially with heavier, soft material).
	5.	Speed reducer gears require lubri-	5.	Check	speed	reducer.
		cation.
	1.	Pump motor is burned out.	1.	Replace pump.
	2.	Screen/filter on pump is clogged.
			2.	Clean screen/filter.
	3.	Impeller is loose.
No coolant flow			3.	Tighten impeller.
	4.	Coolant level too low.
			4.	Add coolant to reservoir.
Excessive speed	1.	V-belt is too tight.	1.	Reset V-belt tension.
reducer noise/
	2. Countering spring not tensioned
vibration			2.	Increase spring tension.
		properly.

Replacement Parts

To order parts or reach our service department, call 1- 800-274-6848 between 7:30am and 6:00pm (CST), Monday through Friday. Having the Model Num- ber and Serial Number of your machine available when you call will allow us to serve you quickly and accu- rately. Order replacement parts from:

WMH Tool Group, Inc.

427 New Sanford Road

LaVergne, Tennessee 30786

Ph: 800-274-6848

Identify the replacement part by the part number shown in the parts listing. Be sure to include the model number and serial number of your machine when ordering replacement parts to assure that you will receive the correct part.