Toro ProCore SR Series Service Manual page 71

Disassembly (Fig. 5)
1. Position aerator on a firm, level surface. If aerator is
attached to tractor, disengage PTO, apply tractor park-
ing brake, stop engine and remove key from the ignition
switch.
CAUTION
Be careful when removing the spring assembly.
The spring is under load and may cause personal
injury during removal.
2. Remove both spring assemblies from rear spring
post (item 8) and front spring holder (item 16).
3. Remove linkage arm components as needed using
Figure 5 as a guide.
4. If necessary, disassemble tine head assembly using
Figure 6 as a guide.
5. If necessary, disassemble hinge assembly using
Figure 7 as a guide.
6. Discard all removed bearings.
Assembly (Fig. 5)
1. If tine head (Fig. 6) or hinge (Fig. 7) assemblies were
disassembled:
A. Make sure that retaining rings are fully seated
into grooves in housing.
B. Press a new bearing into one side of the housing
until it contacts installed retaining ring. Then press
second new bearing into housing so that it contacts
first bearing.
C. Insert inner bushing into housing.
D. Press final two (2) new bearings into housing fol-
lowing above procedure.
E. Make sure that inner bushing is centered in hous-
ing.
2. Apply antiseize lubricant to wrist pins (items 5 and
14).
NOTE: When installing wrist pins (items 5 and 14), use
bullet tool SG255002 (see Special Tools in this chapter)
to prevent wrist pin thread damage.
3. Assemble linkage arm components using Figure 5
as a guide. Torque flange nuts (item 7) to 300 ft- -lb (407
N- -m).
ProCore SR Series
4. Make sure that spring wires are not broken or
crossed (Fig. 8). Install both spring assemblies to rear
spring post (item 8) and front spring holder (item 16).
3
2
5
1. Tine head housing
2. Bearing
3. Retaining ring
2
5
1. Hinge housing
2. Bearing
3. Retaining ring
2
4
1. Spring assembly
2. Rear spring post
Page 5 - - 9
5
1
4
Figure 6
4. Inner bushing
5. Outer bushing
2
3
4
1
3
Figure 7
4. Inner bushing
5. Outer bushing
1
Figure 8
3. Front spring holder
4. Crossed spring wires
Coring Head (SR48 & SR72)
2
3
5
3