Toro ProCore SR Series Service Manual page 49

WARNING
As crankshaft components are removed from
machine, the crankshaft will become out of bal-
ance and may rotate quickly, creating pinch
points and potential for personal injury. Be cau-
tious when disassembling the coring crankshaft.
IMPORTANT: When removing cap screw (item 2)
and crank pin (item 1), note orientation for proper
assembly.
6. For connecting rod that is to be removed, remove
lock nut (item 12) and cap screw (item 2) that secure
lower end of connecting rod to linkage arms.
7. For connecting rod that is to be removed, remove
hex nut (item 14), clipped washer (item 13) and crank pin
(item 1) that secure upper end of connecting rod to cor-
ing crankarms.
8. Remove connecting rod from aerator. Locate and re-
trieve outer bushings (items 3 and 6) from both ends of
connecting rod.
9. If necessary, remove ball bearings, bearing spacer
and retaining rings from connecting rod. Discard re-
moved bearings.
Installation (Fig. 8)
1. If bearings were removed from upper bore of con-
necting rod, install new bearings into upper bore.
A. Install a retaining ring into one of the grooves in
upper bore of rod. Make sure that retaining ring is
properly seated in groove.
B. Press first ball bearing into connecting rod bore
until the bearing contacts the installed retaining ring.
C. Individually, press three more bearings into con-
necting rod bore until the bearing contacts the pre-
viously installed bearing.
D. After all four (4) bearings have been pressed into
connecting rod bore, install second retaining ring.
Make sure that retaining ring is properly seated in
groove.
2. If bearings were removed from lower bore of con-
necting rod, install new bearings into lower bore.
A. Install two (2) retaining rings into the grooves in
lower bore of rod. Make sure that retaining rings are
properly seated in grooves.
ProCore SR Series
B. Press a new bearing into one side of the connect-
ing rod bore until the bearing contacts installed re-
taining ring. Then press second new bearing into
bore so that it contacts first bearing.
C. Insert bearing spacer into lower rod bore.
D. Press final two (2) new bearings into housing fol-
lowing above procedure. Make sure that bearing
spacer is centered in rod bore.
3. Apply antiseize lubricant liberally to bearing surfaces
of crank pin (item 1) and cap screw (item 2).
4. Place outer bushings (items 3 and 6) to both ends of
connecting rod.
NOTE: When installing crank pin (item 1), use bullet
tool SG255001 (see Special Tools in this chapter) to pre-
vent thread damage to crank pin.
5. Position connecting rod assembly to coring crank-
shaft and linkage arms. Insert crank pin (item 1) through
crank arms and upper connecting rod bearings.
NOTE: When installing cap screw (item 2), use bullet
tool SG255002 (see Special Tools in this chapter) to pre-
vent thread damage to screw.
6. Insert cap screw (item 2) through linkage arms and
lower connecting rod bearings.
7. Slide clipped washer (item 13) onto crank pin (item
1) and align washer flat with step in crank arm. Thread
hex nut (item 14) onto crank pin.
8. Thread lock nut (item 12) onto cap screw (item 2).
9. Insert block of wood between aerator frame and con-
necting rod to prevent the crankshaft from turning and
then properly torque connecting rod fasteners:
A. Torque lock nut (item 12) on cap screw to 265 ft- -
lb (359 N- -m).
B. Torque hex nut (item 14) on crank pin to 950 ft- -lb
(1288 N- -m).
10.After assembly, rotate coring crankshaft by hand to
make sure that no binding occurs.
11. Lower and secure rear hood.
Page 4 - - 11 Coring Head (SR54 & SR70)