John Deere POWERTECH 4045 - Manual (Page 153)

Lubrication & Maintenance/500 Hour/12 Month
OURGP11,0000080 –19–27JUL06–1/3
Checking Belt Tensioner Spring Tension and
Belt Wear (Automatic Tensioner)
Belt drive systems equipped with automatic (spring) belt
tensioners cannot be adjusted or repaired. The automatic
belt tensioner is designed to maintain proper belt tension
over the life of the belt. If tensioner spring tension is not
within specification, replace tensioner assembly.
OURGP11,0000080 –19–27JUL06–2/3
RG8098
–UN–18NOV97
Belt Tensioner - Earlier Engines
RG13744
–UN–11NOV04
Belt Tensioner - Later Engines
A—Cast Stop
B—Cast Stop
Checking Belt Wear
The belt tensioner is designed to operate within the limit
of arm movement provided by the cast stops (A and B)
when correct belt length and geometry is used.
Visually inspect cast stops (A and B) on belt tensioner
assembly.
If the tensioner stop on swing arm (A) is hitting the fixed
stop (B), check mounting brackets (alternator, belt
tensioner, idler pulley, etc.) and the belt length. Replace
belt as needed ( see REPLACING FAN AND
ALTERNATOR BELTS in Service As Required Section).
Continued on next page
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080706
PN=151