South bend SB1118, Owner'S Manual

Page: 46 / 84

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For Machines Mfd. Since 10/21
South Bend Tools
Model SB1118
S E R V I C E
Tensioning/Replacing
Belts
Three V-belts transfer power from the motor
to the cutterhead, and then to the infeed and
outfeed rollers with the use of the drive chain
system. To ensure efficient transfer of power to
these systems, make sure the V-belts are always
properly tensioned and in good condition.
If the V-belts are worn, cracked, or damaged,
replace them. Always replace all V-belts at the
same time with a matched set of three, or belt
tension may not be even among the belts, causing
premature belt failure or weakened power
transfer.
Belts and pulleys will be hot after operation.
Allow them to cool before handling.
Items Needed Qty
Hex Wrench 4mm .................................................1
Open-End Wrench 19mm .....................................1
Replacement V-Belts (PSB1118216) ....................3
1. DISCONNECT MACHINE FROM POWER!
2. Open headstock cover and remove upper
and lower side panels on left-hand side of
machine (see Figure 52).
Tensioning/Replacing V-Belts
To tension/replace V-belts:
Figure Figure 52. Location of V-belts and pulleys. . Location of V-belts and pulleys.
Cutterhead Cutterhead
Pulley Pulley
Motor Pulley Motor Pulley
V-Belts V-Belts
!
Cutterhead
Pulley
Approximately
3
⁄
4
" Deflection
Motor
Pulley
Figure Figure 54. Checking V-belt deflection. . Checking V-belt deflection.
3. Remove lower rear panel to access motor
mount hex nuts (see Figure 53).
4. If V-belts need to be replaced, raise motor
to release belt tension, roll belts off pulleys,
then replace with a matched set of three.
5. To adjust V-belt tension, loosen top motor
mount hex nuts (see Figure 53), then adjust
bottom hex nuts to raise or lower motor.
Note: V-belts are properly tensioned when
there is approximately
3
⁄
4
" deflection when
moderate pressure is applied to them midway
between pulleys, as illustrated in Figure 54.
6.
After V-belts are properly tensioned, tighten
top motor mount hex nuts, then install lower
rear panel and upper and lower side panels,
and close headstock cover.
Figure Figure 53. Location of motor mount components. . Location of motor mount components.
Motor Mount Motor Mount
Hex Nut Hex Nut
(1 of 2) (1 of 2)
Motor Mount Motor Mount
Connecting Rod Connecting Rod
(1 of 2) (1 of 2)