-44-
For Machines Mfd. Since 12/20
South Bend Tools
Model SB1108/SB1109
S E R V I C E
Proper pulley alignment prevents premature
V-belt wear and proper power transfer from the
motor. The pulleys are properly aligned when
they are parallel and in the same plane as each
other.
— If pulleys are parallel and in the same
plane, no adjustment is necessary. Re-
install belt cover.
— If pulleys are not parallel or in the same
plane, remove motor access panel, then
proceed to Step 3.
3.
Loosen (4) motor mount bolts, shift motor
until pulleys are aligned, then re-tighten
bolts.
4.
Re-check pulleys and repeat Step 3 as
necessary until you are satisfied with pulley
alignment, then re-tighten all fasteners, and
replace belt cover and motor access panel.
Figure 62. Checking pulley alignment.
!
Checking Pulley
Alignment
NOTICE
DO NOT let chain fall off sprockets. It can
be very difficult to return chain to its proper
location on sprockets without changing table
adjustments.
4.
Clean and lubricate chain and sprockets
(refer to Table Height Chain & Sprockets
on Page 36 for detailed instructions), then
re-install motor access panel.
The table height chain is located under the table.
It transfers movement from the handwheel to
the columns that control table height. The chain
drive can be adjusted to remove slack if the chain
stretches over time or is loosened during table
leveling procedures.
Tensioning Table
Height Chain
To check/re-align pulleys:
1.
DISCONNECT MACHINE FROM POWER!
2.
Remove belt cover, then use straightedge
to check pulley alignment, as shown in
Figure 62.
Items Needed
Qty
Straightedge 3' ......................................................1
Wrench or Socket 14mm, 17mm ................... 2 Ea.
To tension table height chain:
1.
DISCONNECT MACHINE FROM POWER!
2.
Remove motor access panel to access table
height chain (see Figure 63).
3.
Loosen both chain-tension lock bolts (see
Figure 63), then push idler sprocket against
chain with moderate pressure to eliminate
slack in chain. While maintaining pressure
on idler sprocket, re-tighten lock bolts.
Items Needed
Qty
Phillips Screwdriver #2 ........................................1
Wrench or Socket 14mm .......................................1
Idler
Sprocket
Lock Bolts
Figure 63. Location of idler sprocket and chain tension
lock bolts.
!
