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Product Warranties
 9 Months Ended
Jun. 30, 2018
Product Warranties Disclosures [Abstract]  
Product Warranties
Product Warranties
In the ordinary course of business, we warrant our products against defects in design, materials and workmanship typically over periods ranging from twelve to sixty months. We determine warranty reserves needed by product line based on historical experience and current facts and circumstances. Activity in the warranty accrual is summarized as follows:
 
 
Three Months Ended
 
Nine Months Ended
 
 
June 30,
2018
 
July 1,
2017
 
June 30,
2018
 
July 1,
2017
Warranty accrual at beginning of period
 
$
28,255

 
$
23,272

 
$
25,848

 
$
21,363

Additions from acquisitions
 
—

 
433

 
—

 
433

Warranties issued during current period
 
3,451

 
4,030

 
11,488

 
12,185

Adjustments to pre-existing warranties
 
(80
)
 
(124
)
 
(325
)
 
(495
)
Reductions for settling warranties
 
(3,219
)
 
(4,046
)
 
(9,141
)
 
(9,509
)
Foreign currency translation
 
(701
)
 
420

 
(164
)
 
8

Warranty accrual at end of period
 
$
27,706

 
$
23,985

 
$
27,706

 
$
23,985