South Bend Tools Oil Country Series, Owner'S Manual

Page: 59 / 68

South Bend Tools South Bend Tools
For Machines Mfd. Since 7/19 Model SB1065F–SB1071F
-57-
S E R V I C E
Figure 90. Leadscrew feed rod bearing block. Figure 90. Leadscrew feed rod bearing block.
Bearing Bearing
Block Block
Retaining Retaining
Cap Screw Cap Screw
(1 of 2) (1 of 2)
5. Using a thin bladed gasket scraper inserted
under lip of plastic plug, remove two plastic
dust plugs (see Figure 88) mounted on side
of control box.
6. Insert 5mm hex wrench through hole
previously covered by plastic cap and remove
both control box cap screws (see Figure 89)
and ground wire.
7. Carefully lift control box out of the way to
expose area containing shear pins.
8.
Remove two cap screws holding bearing
block (see Figure 90) to side of bed.
Note: Removing bearing block allows for
leadscrew and feed rod movement out of their
bores, so broken pieces of shear pin can be
removed.
9.
Work leadscrew or feed rod out of its bore to
expose ends of broken shear pin.
10. Rotate shaft and hub so smaller end of
tapered bore or pin is facing you.
11.
Use a
1
⁄
4
""
dowel punch and hammer to lightly
tap out broken shear pin pieces.
Ground Wire Ground Wire
Location Location
Figure 89. Shear pin access. Figure 89. Shear pin access.
Control Box Control Box
Cap Screw Cap Screw
(1 of 2) (1 of 2)
12.
Remove any burrs and galling, then re-
install leadscrew or feed rod into their bores.
13. Keeping in mind that bores are tapered,
align tapered shear pin hole and tap new
shear pin into hole using ½" dowel punch
and hammer.
Note
: The feed rod and leadscrew use
different sized shear pins.
14. Re-assemble lathe in reverse order making
sure to re-install previously removed ground
wire.
Figure 91. Shear pin location. Figure 91. Shear pin location.
Shear Pin Shear Pin
Shear Pin Shear Pin
Hub Hub
Hub Hub
Feed rod Feed rod
Leadscrew Leadscrew