Toro ProCore SR Series Service Manual page 57

8. If sprocket removal from coring crankshaft is neces-
sary, remove coring crankshaft bearing housing that in-
cludes sprocket and remove sprocket from crank arm
(see Coring Crankshaft Bearing Housing Removal in
this section).
Assembly (Fig. 13)
1. If coring crankshaft sprocket was removed, secure
sprocket to crank arm and install coring crankshaft bear-
ing housing (see Coring Crankshaft Bearing Housing
Installation in this section).
2. If sprockets were removed from gearbox shaft,
install sprockets to gearbox shaft (see Coring Head
Drive Sprockets Assembly in this section).
3. If idler assembly parts were removed from frame,
install idler components using Figure 13 as a guide.
4. Using a suitable straight edge, check that alignment
between gearbox, coring crankshaft and idler sprockets
is correct. If needed, adjust sprocket location on gear-
box shaft to align sprockets (see Coring Head Drive
Sprockets Assembly in this section).
IMPORTANT: When installing drive chains, install
and properly tension one of the drive chains. Then,
install and tension the second chain.
5. If both drive chains were removed, install first chain:
A. Position drive chain to gearbox sprocket, pull low-
er run of chain tight and align with coring crankshaft
sprocket teeth. If necessary, slightly rotate coring
crankshaft so that chain remains tight when aligned
with sprocket teeth. Route chain over idler sprocket
and back to gearbox sprocket (Fig. 14). Do not allow
lower run of chain to have excessive slack.
B. Apply grease to master link O--rings. Place two
(2) O--rings on master link pins and install into ends
of drive chain. Place final two (2) O--rings on master
link pins and install side plate.
ProCore SR Series
C. Install master link clip so that the closed end is
facing the direction of chain rotation.
IMPORTANT: To prevent gearbox damage, do
not overtighten drive chains. Drive chains
should have 1/2" (12.7 mm) total deflection when
properly adjusted.
D. Adjust idler sprocket location with lock nut (item
5) so that chain has 1/2" (12.7 mm) total deflection at
mid--span between sprockets. Make sure that cap
screw (item 2) is fully tightened after chain adjust-
ment is completed.
6. Block crankshaft to prevent it from rotating. Install
and adjust second drive chain using procedure listed in
step 5 above.
7. Lower and secure rear hood.
2
4
1
1. Drive chain
2. Idler rod
Page 4 - - 19
3
Figure 14
3. Lock nut
4. Cap screw
Coring Head (SR54 & SR70)