Jet JWBS-20 Operating Instructions Manual page 14

Release the blade tension by operating the quick blade
tension lever (Q, Fig 30) and by turning the blade tension
hand wheel (L).
Open the blade guards (Fig 31, Fig 32)
Fig 29
Fig 30
Fig 31
Remove the dust block (J, Fig 33)
Install new saw blade.
After the new saw blade is installed, tighten the sawblade
sufficiently.
Follow the scale (M, Fig 34.1).
Install the dust block (J).
Close the blade guards.
Close the wheel covers.
ATTENTION:
-Check first if the saw blade is tensioned and runs freely and if
all safety devices are fitted before starting the machine.
-Spin the wheels by hand to check.
Fig 32
Fig 33
Fig 34.1