Toro ProCore SR Series Service Manual page 102

Installation (Fig. 11)
1. If bearings were removed from bearing housing,
install new bearings into housing (Fig. 13):
A. Install one (1) retaining ring into groove in bore of
housing. Make sure that retaining ring is properly
seated in groove.
B. Press a new bearing into the housing bore until
the bearing contacts the installed retaining ring.
C. Press second bearing into bore so that it contacts
previously installed bearing.
D. Install second retaining ring into groove in hous-
ing bore. Make sure that retaining ring is properly
seated in groove.
2. If spring pins were removed, drive new spring pins
into frame holes.
3. Install components into bearing housing assembly:
A. If either of the removed crank arms included a
drive sprocket, install sprocket if it was removed (Fig.
12). Make sure that crank pin is installed into crank
arm before sprocket is installed.
B. If both crank arms were removed from crank
shaft, use notes made during disassembly to proper-
ly orientate one of the crank arms and slide onto
crank shaft. Install crank shaft nut onto crank shaft
threads to secure crank arm to crank shaft.
C. Apply antiseize lubricant liberally to crank shaft
(item 12). Slide crank shaft into bearing housing as-
sembly.
D. Using notes made during disassembly, properly
orientate second crank arm and slide onto crank
shaft.
E. Install crank nut onto crankshaft threads to se-
cure second crank arm to crank shaft.
Coring Head (SR75)
4. Position bearing housing assembly to aerator frame.
Install and tighten two (2) cap screws and lock nuts to
secure bearing housing assembly to coring head frame.
5. Install crank pins and connecting rods on both sides
of bearing housing (see Connecting Rod Installation in
this section).
6. Rotate coring crankshaft to allow access to crank
nuts (item 9) that secure crank arms and connecting
rods on both sides of crankshaft bearing housing.
IMPORTANT: When tightening crank nut (item 9) DO
NOT use a pipe wrench or other adjustable wrench.
Damage to the crank nut (item 9), crank shaft (item
12) and crank pin (item 7) may occur if adjustable
wrench is used.
7. Insert block of wood between aerator frame and con-
necting rod to prevent the crankshaft from turning.
Torque crank nuts (item 9) that secure crank arms and
connecting rods on both sides of crankshaft bearing
housing to 1200 ft- -lb (1627 N- -m).
8. After assembly, rotate coring crankshaft by hand to
make sure that no binding occurs.
9. Install cotter pins (item 3) in removed crank nuts.
IMPORTANT: When installing coring head drive
chains, make sure that one of the chains is installed
and properly tensioned before installing second
chain.
10.If removed, install coring head drive chain (see Cor-
ing Head Drive Assembly in this section). Make sure that
chain is properly tensioned.
11. Lower and secure back cover.
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