Toro ProCore SR Series Service Manual page 85

5. Remove four (4) cap screws, lock washers and flat
washers that secure driveshaft shield (item 20) to gear-
box. Remove shield.
6. Remove drive chains from gearbox sprockets (see
Coring Head Drive Chain Disassembly in this section).
7. Remove drive sprocket and sprocket hub from both
gearbox output shafts (see Coring Head Drive Sprock-
ets Disassembly in this section).
8. Remove ten (10) saddle bolts (item 10) and lock nuts
(item 13) that secure gearbox flanges to frame.
9. Remove four (4) cap screws and lock washers that
secure gearbox to aerator frame.
CAUTION
To prevent personal injury, make sure that gear-
box is supported as it is removed from the ma-
chine. Refer to Specifications in this chapter for
approximate gearbox weight.
10.Carefully remove gearbox from machine.
NOTE: For gearbox disassembly and assembly infor-
mation, refer to the Service and Repairs section of
Chapter 7 -- Gearbox Service.
Gearbox Installation (Fig. 20)
IMPORTANT: If a gearbox is incorrectly assembled
or installed (e.g. output shaft installed into gearbox
in reverse direction or gearbox placed on frame up-
side down), there is a possibility that gearbox out-
put shaft rotation will be incorrect for proper aerator
operation. After placing the gearbox on the frame,
make sure that rotation of the input shaft results in
the correct output shaft rotation direction. Figure 21
shows correct shaft rotation direction for the gear-
box shafts. If rotation is incorrect, check gearbox
assembly and installation before proceeding with
installation procedure.
CAUTION
To prevent personal injury, make sure that gear-
box is supported as it is installed to the machine.
Refer to Specifications in this chapter for
approximate gearbox weight.
1. Position gearbox to aerator frame. Secure gearbox
to frame with four (4) cap screws and lock washers.
ProCore SR Series
2. Install and tighten ten (10) saddle bolts (item 10) and
lock nuts (item 13) to frame and gearbox flanges.
3. Install sprocket and sprocket hub to both gearbox
output shafts (see Coring Head Drive Sprockets Assem-
bly in this section).
4. Install both drive chains (see Coring Head Drive
Chain Assembly in this section). Make sure that drive
chains are properly adjusted after assembly.
5. Position driveshaft shield (item 20) to gearbox and
secure with four (4) cap screws, lock washers and flat
washers.
6. Connect PTO driveshaft to gearbox input shaft (see
PTO Driveshaft Installation in the Service and Repairs
section of Chapter 3 -- Chassis).
7. Fill gearbox with proper lubricant (see Operator's
Manual).
8. After assembly, rotate coring crankshaft by hand to
make sure that no binding occurs.
9. Install screens to aerator (see Covers Installation in
the Service and Repairs section of Chapter 3 -- Chas-
sis).
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Figure 21
Coring Head (SR48 & SR72)