Toro Greens Aerator, Service Manual

Page: 117 / 130

Removal (Fig. 11)
1. Park the machine on a level surface, fully raise the
coring head and stop the engine. Remove the key from
the ignition switch.
2. Raise lock–up brackets on each side of machine and
lower coring head until it rests on brackets.
3. Unlatch and remove coring head cover.
4. Remove exhaust muffler guard (see Exhaust Sys-
tem Removal in Service and Repair section of Chapter
3 – Engine).
5. Remove traction drive belt from engine pulley (see
Traction Drive Belt Removal in Service and Repairs sec-
tion of Chapter 7 – Drive Train).
6. Remove both coring head chains (see Coring Head
Chain Removal in this section).
7. Remove lock nuts (item 26) that secure sprockets
(item 24) to power shaft. Pull flat washer (item 25),
sprocket and spacer (items 23 and 37) from both ends
of shaft. Note that length of spacers is different.
8. Remove cap screws (items 10 and 12) and lock
washers that secure idler pulley (item 44) to idler brack-
ets. Pull idler pulley from brackets. Locate and retrieve
two (2) spacers (item 41) from sides of pulley.
IMPORTANT: Matchmark bearing cap and coring
head frame bore before removing bearing cap.
Bearing caps must be installed in the same position
they were removed from.
9. Remove socket head screws (item 28) and lock
washers (item 11) that secure bearing caps to coring
head frame. Slide bearing caps from frame.
10.Carefully reposition power shaft in coring head frame
to allow coring head drive belt to be removed from pulley
and shaft. After belt has been removed, support power
shaft to prevent it from falling.
11. Remove coring head drive belt from idler bracket,
engine pulley and machine.
Installation (Fig. 11)
1. Make sure that bores of coring head frame and bear-
ing caps are free of nicks, burrs or corrosion. If neces-
sary, use 320 grit emery cloth to remove imperfections
in bores. Clean bores thoroughly before installation of
power shaft into coring head frame.
2. If any retaining clips were removed, secure retaining
clips with lock washer and socket head screw. Make
sure that clips are perpendicular to bearing bore prior to
tightening screw.
3. Carefully position power shaft in coring head frame
to allow coring head drive belt to be placed around pow-
er shaft and pulley. Install belt and support power shaft
to prevent it from falling.
4. Position power shaft to coring head frame. Make
sure that shaft bearing with retaining ring is placed at re-
taining clips on the right side of the coring head frame.
IMPORTANT: Bearing caps must be installed in the
same position they were removed from.
5. Install bearing caps noting matchmarks made during
removal to ensure that bearing caps are properly posi-
tioned. Secure bearing caps to coring head frame with
lock washers (item 11) and socket head screws (item
28). Torque screws from 20 to 35 ft–lb (27 to 47 N–m).
6. Position coring head drive belt to the right side of the
pulley. The left pulley groove should be unused (Fig. 12).
7. Position idler pulley (item 44) to idler brackets. Place
spacer (item 41) on each side of pulley. Secure idler
pulley to idler brackets with cap screws (items 10 and
12) and lock washers.
8. Place coring head drive belt onto engine pulley.
9. Slide spacer (items 23 and 37), sprocket (item 24)
and flat washer (item 25) onto each end of power shaft.
Sprocket and shaft splines have marks that should be
aligned during assembly. Install lock nuts (item 26) on
shaft and torque from 150 to 170 ft–lb (203 to 230 N–m).
10.Check that coring head drive belt alignment is still
correct. If needed, readjust location of power shaft
pulley and/or idler bracket to align drive belt.
11. Check that 1/8” (3.2 mm) clearance exists between
bottom of belt guide (item 2) and installed belt. Reposi-
tion guide if needed.
1 3
2
Figure 12
1. Pulley 3. Unused pulley groove
2. Drive belt
Coring Head
Greens Aerator Page 8 – 11 Coring Head