Brother BAS-311E Service Manual page 73

311EL and 326E, 326EL
w
t
y
r
Adjusting the tension of X-timing belt A326
X-timing belt A326 e is looped around X-timing pulley A311 (A326) q and X-timing pulley B326 w.
The tension of X-timing belt A326 e should have 1 mm deflection when it is pressed in the middle of X-timing pulley
A311 (A326) q and X-timing pulley B326 w with a load of 4.9N (0.5 kgf) in the direction of the arrow.
Turn the bolts r clockwise to move X-pulley bracket L t until the appropriate tension is given, and secure X-pulley
bracket L t to the bed using the screws y.
Note: The bolts r for adjusting the timing belt tension are in front of and behind X-pulley bracket L t. Adjust the bolts
r equally so that X-pulley bracket L t does not lean to one side.
Adjusting the tension of X-timing belt B326
X-timing belt B326 o is looped around timing pulley A u and timing pulley B i.
The tension of X-timing belt B326 o should have 3 mm deflection when it is pressed in the middle of timing pulley A u
and timing pulley B i with a load of 9.8N (1 kgf) in the direction of the arrow. (326EL: 2.5 mm deflection with a load of
9.8N (1 kgf)
Turn the bolts !0 clockwise to move X-pulley bracket R !1 until the appropriate tension is given, and secure X-pulley
bracket R ! 1 to the bed using the bolts ! 2 .
•311EL
1.5mm
•326E, 326EL
1mm
9.8N
e
(1kgf)
u
BAS-311E.311EL.326E.326EL
9.8N
•311EL
(1kgf)
3mm
•326E, 326EL
2.5mm
q i
Chapter 4. Adjustments
!1
o
!2
!0
65