Milwaukee MK-Manta I owner manual Troubleshooting

Troubleshooting			When trouble occurs, be sure to check the simple causes which, at first, may
			seem too obvious to be considered. Refer to the table below for problems and
			their possible causes.
	PROBLEM	WHAT TO DO?	INDICATION	CAUSE	SOLUTION/ RECOMMENDATIONS
		1. Check fluid	Fluid not muddy.	Drilling in steel	Adjust drilling parameters to
		return.	Evidence of steel	reinforcement	recommendations for reinforcement
			cuttings
		2. Check motor		Speed not correct for	See recommended
		speed range		the bit size used	speeds
	Low		Bit worn out.		Replace with new bit
	Penetration			Insufficient bit load	Increase bit load
	Rate Under		Diamond without
	Prevailing		exposure.	Rotated with	Reduce RPM, or resharpen bit
	Drilling	3. Check wear	(flush with matrix)	high RPM on
	Paramters	picture of bit		reinforcement
		face			Break core, clean bottom of hole or
				Loose material at	reduce RPM and drill with increased
					bit load
				bottom of hole
				Not enough fluid	Clean bit face by sharpening methods
			Face of bit	pumped. Cuttings
					such as drilling dry at low RPM in a
			plugged with	burnt to matrix.
					concrete block 3/8” deep max.
			cuttings	Diamonds prevented
					Increase water flow rate
				from cutting
				Steel cuttings stick to	Clean bit face by drilling in concrete
			Face of bit	bit face. Diamonds
					block.
			covered with steel	prevented from
					Reduce RPM
			Steel cuttings stick	cutting
			to bit face.
			Wear picture of	Bit load too low	Increase bit load
				Bit speed too high
			polished diamonds		Use lower speed; increase bit load
	Heavy			Worn or open guide
	Wear at			ways on cradle.
	Steel Tube			Borehole is getting	Adjust guidance on carraige
			Deep grooves.	undulated
				Protruding steel.	Adjust guidance on carraige
				Spindle is offset.
					Nicks or dirt on mounting faces
				Bit out of true
				Bit is deformed.	Replace bit.
			Heavy Wear.	Poor cleaning of	Improve flushing.
				abrasive cuttings.
				Crown clearance	Replace bit
				worn out.
	No return of	Check where			If Leaking can be tolerated; continue
	fluid	fluid is leaking.
					drilling with increased attention.

MANTA I Revision 03/05, Effective Date March 2, 2005 13