Husqvarna SC18/968981201, SC18/968999352 manual Troubleshooting, Blade not disengaging

TROUBLESHOOTING

PROBLEM		ANSWER/COMMENT
Blade not disengaging	New Unit or New Belt:
	1.	Run the machine with the blade engaged until the belt
		stretches.
	Used Unit or Old Belt:
	1.	Adjust the Belt Keeper so each leg touches when idler
		pulley is not engaged and so idler pulley clears Belt Keeper
		when engaged.
	2.	Be sure the correct Husqvarna belt is being used. If not,
		replace with a Husqvarna belt.
	3.	Belt Idler Pivot Bolt may be too tight or need lubrication.
	4.	Belt Idler Return Spring may be broken or came off
		anchors. Reattach or replace as necessary.
	5.	Check to see if the Tension Cable is out of pulley. Install
		cable in pulley and squeeze bracket sides to minimize
		the gap to pulley.
Belt coming off	1.	RPM may be too high. Set to 3000 RPM See Technical
		Bulletin “Throttle Cable Adjustment.”
	2.	Align pulleys. See Technical Bulletin “Inspection Procedure
		for Belt Tension “.
	3.	Replace the Belt Idler Pulley Arm if it is bent.
Belt glazed or slipping	1.	Limit maximum depth of cut to 2 1/2”.
	2.	Be sure the updated Blade Lift Springs are installed.
		(Springs have 1.5 inch OD.)
	3.	If the Blade Lift Springs are worn they will allow the blade to
		cut too deeply, which causes the belt to slip. Replace if
		necessary.
	4.	Be sure the maximum RPM is set at 3000. See Technical
		Bulletin “Throttle Cable Adjustment.”
	5.	Be sure the correct Husqvarna belt is being used. If not,
		replace with a Husqvarna belt.
	6.	Check if belt is being stretched by comparing with a new
		belt.
	7.	Check to see if the Tension Cable is out of pulley. Install
		cable in pulley and squeeze bracket sides to minimize the
		gap to pulley.
	8.	If the Gear Box Pulley or the Engine Pulley is wet, oily, or
		damaged, clean or replace.
	9.	Belt tension can be increased by tightening the Cable
		Tension nut. If additional adjustment is unavailable, add a
		1/2” stack of washers between Tension Nut and Cable
		Bracket.

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