HM126 Operator’s Manual
DRIVE BELT TENSION
To check the drive belt tension, push against it firmly and measure the deflection. There should
be no more than
¼
in [6 mm] of movement. If the belt deflection exceeds this amount it will
need to be tightened as described below.
**Never attempt to adjust the belt tension with the engine running. As a safety
precaution, remove the spark plug cap.**
Start by loosening the M16 hex bolt (
1A
) and lock nut (
1B
) that secure the belt tensioner
mechanism to the sawhead. Then loosen the M8 bolt (
2A
) in the curved slot—its nut (
2B
) is
secured in place by an anti-rotation device and does not require a second wrench or socket.
**
Only loosen the bolts approx. one turn—do not remove them.**
HM126-MY2021-EN: Rev F
Page
of
68
112
14-Jul-2021
Make sure the blade is under proper tension
when setting the drive belt tension. This
ensures the belt is fully seated into the
pulley grooves when the deflection is
, for
more information.
BX57
Follower Belt
BX80
Drive Belt