Toro ProCore SR Series Service Manual page 54

3. Install components to bearing housing assembly:
A. If a removed crank arm included a drive sprocket,
install sprocket if it was removed (Fig. 12).
B. If both crank arms were removed from crank
shaft, use notes made during disassembly to proper-
ly orientate one of the crank arms (items 6 or 13) and
slide onto crank shaft. Install hex nut onto crank shaft
threads to secure crank arm to crank shaft.
C. Apply antiseize lubricant liberally to crank shaft
(item 11). Noting orientation of crank shaft grooves
from disassembly, slide crank shaft with attached
crank arm into bearing housing. Do not tighten bear-
ing set screws (item 15) at this time.
D. Using notes made during disassembly, properly
orientate second crank arm (items 6 or 13) and slide
onto crank shaft. Install hex nut onto crank shaft
threads to secure crank arm to crank shaft.
E. Secure bearing housing assembly in a vise and
fully tighten hex nuts to secure assembly. Torque hex
nuts from 950 ft- -lb (1288 N- -m).
4. Position bearing housing assembly (with crank arms
attached) to spring pins on aerator frame. Install two (2)
cap screws and lock nuts to secure bearing housing as-
sembly to coring head frame.
Coring Head (SR54 & SR70)
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 hex nuts
(item 5) that secure crank arms and connecting rods on
both sides of crankshaft bearing housing.
7. Insert block of wood between aerator frame and con-
necting rod to prevent the crankshaft from turning.
Torque hex nuts (item 5) that secure crank arms and
connecting rods on both sides of crankshaft bearing
housing to 950 ft- -lb (1288 N- -m).
8. Tighten set screws (item 15) to secure ball bearing
flange to crank shaft.
9. After assembly, rotate coring crankshaft by hand to
make sure that no binding occurs.
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 Chain Installation in this section). Make
sure that coring crankshaft is properly positioned before
installing drive chain and also that chain is properly ten-
sioned after installation.
11. Lower and secure back cover.
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