Toro ProCore SR Series Service Manual page 47

NOTE: The linkage arm assemblies for ProCore SR54
and SR70 aerators are very similar. The ProCore SR54
linkage arm assembly is shown in Figure 5. The tine
head assembly used on ProCore SR54--S and SR70--S
is shown in Figure 6.
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.
2. Remove linkage arm components as needed using
Figures 5 and 6 as guides.
3. If necessary, disassemble rear spool assembly us-
ing Figure 7 as a guide.
4. Discard all removed bearings.
Assembly (Fig. 5)
1. If rear spool assembly was disassembled (Fig. 7):
A. Make sure that retaining rings are fully seated
into grooves in hinge housing.
B. Press a new bearing into one side of the hinge
housing until contacts installed retaining ring. Then
press second new bearing into housing so that it con-
tacts first bearing.
C. Insert inner bushing into housing.
D. Press final two (2) new bearings into housing fol-
lowing above procedure.
2. If bearings (item 7) were removed from linkage arms,
press new bearings into arms.
NOTE: When installing cap screw (item 2), use bullet
tool SG255002 (see Special Tools in this chapter) to pre-
vent thread damage to screw.
3. Assemble all linkage arm components using Figures
5 and 6 as guides.
ProCore SR Series
16
12
16
13
4
12
6
1. Spring assembly
2. Head bumper
3. Lock nut
4. Flange bushing
5. Spring spool
6. Bolt
7. Cap screw
8. Lock washer
2
5
3
1. Hinge housing
2. Bearing
3. Retaining ring
Page 4 - - 9
1
2
3
4
15
14
11
5
10
Figure 6
9. Set screw
10. Head adapter
11. Head spacer
12. Cap screw
13. Head bumper
14. Tube
15. Head spacer
16. Linkage arm
5
1
3
4
Figure 7
4. Inner bushing
5. Outer bushing
Coring Head (SR54 & SR70)
3
5
6
7
8
7
8
9
2