Toro 09920 Service Manual
Form No. 10174SL Rev B
ProCore® SR Series
(Models SR48, SR54, SR54-S, SR70, SR70-S,
SR72 and SR75)
Original Instructions (EN)
Revision History
Revision
Date
Description
--
2010
Initial Issue
A
02/2018
Added revision history.
B
07/2020
Updated Chassis chapter.
©
reproduced by a third party without the express written consent of The Toro Company (and/or the appropriate affiliated company).
THE TORO COMPANY 2020
This document and all information contained herein is the sole property of The Toro Company (and/or its affiliated companies). No
intellectual property rights are granted by the delivery of this document or the disclosure of its content. This document shall not be
Reader Comments
The Toro Company Technical Assistance Center maintains a continuous effort to improve the quality
and usefulness of its publications. To do this effectively, we encourage user feedback.
Please comment on the completeness, accuracy, organization, usability, and readability of this manual
by an e-mail to servicemanuals@toro.com
or Mail to:
Technical Publication Manager, Commercial
The Toro Company
8111 Lyndale Avenue South
Bloomington, MN 55420-1196
Phone: +1 952-887-8495
NOTES _
Preface
The purpose of this publication is to provide the service
technician with information for troubleshooting, testing
and repair of major systems and components on the
ProCore SR series deep tine aerators: models SR48,
SR54, SR54--S, SR70, SR70--S, SR72 and SR75.
REFER TO THE OPERATOR’S MANUAL FOR OPERATING, MAINTENANCE AND ADJUSTMENT
INSTRUCTIONS. For reference, insert a copy of the
Operator’s Manuals and Parts Catalog for your machine
into Chapter 2 of this service manual. Additional copies
of the Operator’s Manuals and Parts Catalog are available on the internet at www.Toro.com.
The Toro Company reserves the right to change product
specifications or this publication without notice.
Part No. 10174SL (Rev. B)
Service Manual
ProCoreRSR Series
This safety symbol means DANGER, WARNING,
or CAUTION, PERSONAL SAFETY INSTRUCTION. When you see this symbol, carefully read
the instructions that follow. Failure to obey the
instructions may result in personal injury.
NOTE: A NOTE will give general information about the
correct operation, maintenance, service, testing or repair of the machine.
IMPORTANT: The IMPORTANT notice will give important instructions which must be followed to prevent damage to systems or components on the
machine.
E The Toro Company -- 2011, 2018, 2020
This page is intentionally blank.
ProCore SR Series
Table Of Contents
Chapter 1 -- Safety
Safety Instructions 1 -- 2..........................
Safety and Instruction Decals 1 -- 4................
Chapter 2 -- Product Records and Maintenance
Product Records 2 -- 1...........................
Maintenance 2 -- 1...............................
Equivalents and Conversions 2 -- 2................
Torque Specifications 2 -- 3.......................
Chapter 3 -- Chassis
General Information 3 -- 1........................
Service and Repairs 3 -- 2........................
Chapter 4 -- Coring Head (SR54 & SR70)
Specifications 4 -- 2..............................
General Information 4 -- 4........................
Special Tools 4 -- 7..............................
Service and Repairs 4 -- 8........................
Chapter 5 -- Coring Head (SR48 & SR72)
Specifications 5 -- 2..............................
General Information 5 -- 4........................
Special Tools 5 -- 6..............................
Service and Repairs 5 -- 8........................
SafetyProduct Records
and Maintenance
ChassisCoring Head
(SR54 & SR70)
Chapter 6 -- Coring Head (SR75)
Specifications 6 -- 2..............................
General Information 6 -- 4........................
Special Tools 6 -- 6..............................
Service and Repairs 6 -- 8........................
Chapter 7 -- Gearbox Service
General Information 7 -- 1........................
Service and Repairs 7 -- 2........................
Coring Head
(SR48 & SR72)
(SR75)
Coring Head
Service
Gearbox
ProCore SR Series
This page is intentionally blank.
ProCore SR Series
Chapter 1
Safety
Table of Contents
SAFETY INSTRUCTIONS 2......................
Before Operating 2............................
While Operating 3.............................
Maintenance and Service 3....................
SAFETY AND INSTRUCTION DECALS 4..........
Safety
ProCore SR Series Page 1 -- 1 Safety
Safety Instructions
The ProCore SR series of deep tine aerators are designed and tested to offer safe service when operated
and maintained properly. Although hazard control and
accident prevention partially are dependent upon the
design and configuration of the machine, these factors
are also dependent upon the awareness, concern and
proper training of the personnel involved in the operation, transport, maintenance and storage of the machine. Improper use or maintenance of the machine can
result in injury or death. T o reduce the potential for injury
or death, comply with the following safety instructions.
Before Operating
WARNING
To reduce the potentialfor injury or death, comply with the following safety instructions.
1. Review and understand the contents of the Operator’s Manual before starting and operating the vehicle.
Become familiar with the controls and know how to stop
the vehicle and engine quickly. Additional copies of the
Operator’s Manual are available on the internet at
www.Toro.com.
2. Keep all shields, safety devices and decals in place.
If a shield, safety device or decal is defective, illegible
or damaged, repair or replace it before operating the
machine.
3. Make sure that the tractor is carefully selected to assure the best performance and safe operation of the
ProCore deep tine aerator.
4. Make sure that operator is familiar with safe tractor
operation.
5. Tighten any loose nuts, bolts or screws to ensure
machine is in safe operating condition.
6. Make sure that the ProCore deep tine aerator is
properly attached to tractor.
ProCore SR SeriesPage 1 -- 2Safety
While Operating
IMPORTANT: T o prevent damage to your ProCore
aerator during operation:
• Never operate ProCore aerator without tine
heads installed.
• Do not operate the tractor in reverse when the
ProCore aerator is lowered.
• Make sure aerator roller is on ground before operating aerator. Never operate with the aerator in
the raised position.
• Never operate the tractor PTO in excess of 500
RPM.
1. Operator should be on the tractor when starting the
engine and when operating the aerator. Stay away from
the aerator coring head when it is engaged.
2. Before starting the engine on the tractor:
A. Apply the parking brake.
B. Make sure traction lever or transmission is in neutral and PTO is disengaged.
C. Refer to Tractor Operator’s Manual for safe starting procedures.
3. Do not run tractor engine in a confined area without
adequate ventilation. Exhaust fumes are hazardous
and could possibly be deadly.
4. If abnormal aerator vibration is detected, disengage
PTO and stop tractor immediately. Determine source of
vibration and correct problem(s) before resuming the
use of aerator.
5. While operating, the combination of the tractor and
the ProCore aerator may exceed noise levels of
85dB(A) at the operator position. Hearing protection is
recommended for prolonged exposure to reduce the potential of permanent hearing damage.
6. Before leaving the operator’s position of the tractor:
A. Disengage PTO power to aerator and lower aerator to the ground.
B. Apply parking brake on tractor. Stop engine and
remove key from ignition switch.
C. Wait for all moving parts to stop before leaving
the tractor.
Safety
Maintenance and Service
1. The Operator’s Manual provides information regarding the operation, general maintenance and maintenance intervals for your ProCore aerator. Refer to this
publication for additional information when servicing the
machine.
2. Before servicing or making adjustments to aerator,
disengage tractor PTO, position aerator on a level surface and lower aerator to the ground. Apply tractor parking brake, stop engine and remove key from the ignition
switch.
3. Make sure machine is in safe operating condition by
keeping all nuts, bolts and screws tight.
4. Use care when checking or servicing the coring
head: wear gloves and use caution.
5. Never step over the PTO shaft to reach other side of
aerator. Walk around the machine instead.
6. The friction clutch on the PTO driveshaft may become hot during use. Make sure that clutch has cooled
before performing any service on the driveshaft.
7. Before disconnecting aerator from tractor, install
storage stand to aerator frame and park aerator on a
hard, level surface.
8. After servicing the aerator, be sure that all guards
and covers are properly installed and secured.
9. At the time of manufacture, the machine conformed
to all applicable safety standards. To assure optimum
performance and continued safety certification of the
machine, use genuine Toro replacement parts and accessories. Replacement parts and accessories made
by other manufacturers may result in non-conformance
with the safety standards, and the warranty may be
voided.
10.If major repairs are ever needed or assistance is desired, contact an Authorized Toro Distributor.
ProCore SR Series Page 1 -- 3 Safety
Safety and Instruction Decals
Numerous safety and instruction decals are affixed to
the ProCore SR series deep tine aerator. If any decal
becomes illegible or damaged, install a new decal. Part
numbers for replacement decals are listed in your Parts
Catalog. Order replacement decals from your Authorized Toro Distributor.
ProCore SR SeriesPage 1 -- 4Safety
Product Records and Maintenance
Table of Contents
PRODUCT RECORDS 1.........................
MAINTENANCE 1...............................
EQUIVALENTS AND CONVERSIONS 2...........
Decimal and Millimeter Equivalents 2............
U.S. to Metric Conversions 2...................
TORQUE SPECIFICATIONS 3....................
Fastener Identification 3.......................
Standard Torque for Dry, Zinc Plated and
Steel Fasteners (Inch Series) 4...............
Standard Torque for Dry, Zinc Plated and
Steel Fasteners (Metric Fasteners) 5...........
Other Torque Specifications 6..................
Conversion Factors 6..........................
Product Records
Chapter 2
Product Records
and Maintenance
Insert Operator’s Manual and Parts Catalog for your
ProCore SR Series deep tine aerator at the end of this
chapter. Additionally, if any optional equipment or accessories have been installed to your ProCore, insert
the Installation Instructions, Operator’s Manuals and
Parts Catalogs for those options at the end of this chapter.
Maintenance
Maintenance procedures and recommended service intervals for the ProCore SR Series deep tine aerator are
covered in the Operator’s Manual. Refer to that publication when performing regular equipment maintenance.
ProCore SR Series Page 2 -- 1 Product Records and Maintenance
Equivalents and Conversions
0.09375
ProCore SR SeriesPage 2 -- 2Product Records and Maintenance
Torque Specifications
Recommended fastener torque values are listed in the
following tables. For critical applications, as determined
by Toro, either the recommended torque or a torque that
is unique to the application is clearly identified and specified in this Service Manual.
These Torque Specifications for the installation and
tightening of fasteners shall apply to all fasteners which
do not have a specific requirement identified in this Service Manual. The following factors shall be considered
when applying torque: cleanliness of the fastener, use
of a thread sealant (e.g. Loctite), degree of lubrication
on the fastener, presence of a prevailing torque feature,
hardness of the surface underneath the fastener’s head
or similar condition which affects the installation.
Fastener Identification
As noted in the following tables, torque values should be
reduced by 25% for lubricated fasteners to achieve
the similar stress as a dry fastener. Torque values may
also have to be reduced when the fastener is threaded
into aluminum or brass. The s pecific torque value
should be determined based on the aluminum or brass
material strength, fastener size, length of thread engagement, etc.
The standard method of verifying torque shall be performed by marking a line on the fastener (head or nut)
and mating part, then back off fastener 1/4 of a turn.
Measure the torque required to tighten the fastener until
the lines match up.
Product Records
and Maintenance
Grade 1 Grade 5 Grade 8
Inch Series Bolts and Screws
Figure 1
Class 8.8 Class 10.9
Metric Bolts and Screws
Figure 2
ProCore SR Series Page 2 -- 3 Product Records and Maintenance
Standard Torque for Dry, Zinc Plated and Steel Fasteners (Inch Series)
Thread Size
# 6 -- 32 UNC
# 6 -- 40 UNF
# 8 -- 32 UNC
# 8 -- 36 UNF
#10--24UNC
#10--32UNF
1/4 -- 20 UNC 48 + 7 53 + 7 599 + 79 100 + 10 1125 + 100 140 + 15 1580 + 170
1/4 -- 28 UNF 53 + 7 65 + 10 734 + 11 3 11 5 + 10 1300 + 100 160 + 15 1800 + 170
5/16 -- 18 UNC 115 + 15 105 + 17 1186 + 169 200 + 25 2250 + 280 300 + 30 3390 + 340
5/16 -- 24 UNF 138 + 17 128 + 17 1446 + 192 225 + 25 2540 + 280 325 + 30 3670 + 340
3/8 -- 16 UNC 16 + 2 16 + 2 22 + 3 30 + 3 41 + 4 43 + 4 58 + 5
Grade 1, 5 &
8withThin
Height Nuts
in--lb in--lb N--cm in--lb N--cm in--lb N--cm
10 + 2 13 + 2 147 + 23
13 + 2 25 + 5 282 + 30
18 + 2 30 + 5 339 + 56
ft--lb ft--lb N--m ft--lb N--m ft--lb N--m
SAE Grade 1 Bolts, Screws, Studs &
Sems with Regular Height Nuts
(SAE J995 Grade 2 or Stronger Nuts)
SAE Grade 5 Bolts, Screws, Studs &
Sems with Regular Height Nuts
(SAE J995 Grade 2 or Stronger Nuts)
15 + 2 170 + 20 23 + 2 260 + 20
17 + 2 190 + 20 25 + 2 280 + 20
29 + 3 330 + 30 41 + 4 460 + 45
31 + 3 350 + 30 43 + 4 485 + 45
42 + 4 475 + 45 60 + 6 675 + 70
48 + 4 540 + 45 68 + 6 765 + 70
SAE Grade 8 Bolts, Screws, Studs &
Sems with Regular Height Nuts
(SAE J995 Grade 5 or Stronger Nuts)
3/8 -- 24 UNF 17 + 2 18 + 2 24 + 3 35 + 3 47 + 4 50 + 4 68 + 5
7/16 -- 14 UNC 27 + 3 27 + 3 37 + 4 50 + 5 68 + 7 70 + 7 95 + 9
7/16 -- 20 UNF 29 + 3 29 + 3 39 + 4 55 + 5 75 + 7 77 + 7 104 + 9
1/2 -- 13 UNC 30 + 3 48 + 7 65 + 9 75 + 8 102 + 11 105 + 10 142 + 14
1/2 -- 20 UNF 32 + 3 53 + 7 72 + 9 85 + 8 115 + 11 120 + 10 163 + 14
5/8 -- 11 UNC 65 + 10 88 + 12 119 + 16 150 + 15 203 + 20 210 + 20 285 + 27
5/8 -- 18 UNF 75 + 10 95 + 15 129 + 20 170 + 15 230 + 20 240 + 20 325 + 27
3/4 -- 10 UNC 93 + 12 140 + 20 190 + 27 265 + 25 359 + 34 375 + 35 508 + 47
3/4 -- 16 UNF 115 + 15 165 + 25 224 + 34 300 + 25 407 + 34 420 + 35 569 + 47
7/8 -- 9 UNC 140 + 20 225 + 25 305 + 34 430 + 45 583 + 61 600 + 60 813 + 81
7/8 -- 14 UNF 155 + 25 260 + 30 353 + 41 475 + 45 644 + 61 660 + 60 895 + 81
NOTE: Reduce torque values listed in the table above
by 25% for lubricated fasteners. Lubricated fasteners
are defined as threads coated with a lubricant such as
oil, graphite or thread sealant such as Loctite.
NOTE: The nominal torque values listed above for
Grade 5 and 8 fasteners are based on 75% of the minimum proof load specified in SAE J429. The tolerance is
approximately +
10% of the nominal torque value. Thin
height nuts include jam nuts.
NOTE: Torque values may have to be reduced when
installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based
on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
ProCore SR SeriesPage 2 -- 4Product Records and Maintenance
Standard Torque for Dry, Zinc Plated and Steel Fasteners (Metric Fasteners)
Class 8.8 Bolts, Screws and Studs with
Thread Size Regular Height Nuts
(Class 8 or Stronger Nuts)
M5 X 0.8 57 + 5in--lb 640 + 60 N--c m 78 + 7in--lb 885 + 80 N--cm
M6 X 1.0 96 + 9in--lb 1018 + 100 N--cm 133 + 13 in --lb 1500 + 150 N--cm
M8 X 1.25 19 + 2ft--lb 26 + 3N--m 27 + 2ft--lb 36 + 3N--m
M10 X 1.5 38 + 4ft--lb 52 + 5N--m 53 + 5ft--lb 72 + 7N--m
M12 X 1.75 66 + 7ft--lb 90 + 10 N--m 92 + 9ft--lb 125 + 12 N--m
M16 X 2.0 166 + 15 ft--lb 225 + 20 N--m 229 + 22 ft--lb 310 + 30 N--m
M20 X 2.5 325 + 33 ft--lb 440 + 45 N-- m 450 + 37 ft--lb 610 + 50 N--m
NOTE: Reduce torque values listed in the table above
by 25% for lubricated fasteners. Lubricated fasteners
are defined as threads coated with a lubricant such as
oil, graphite or thread sealant such as Loctite.
NOTE: Torque values may have to be reduced when
installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based
on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
NOTE: The nominal torque values listed above are
based on 75% of the minimum proof load specified in
SAE J1199. The tolerance is approximately +
nominal torque value.
Class 10.9 Bolts, Screws and Studs with
Regular Height Nuts
(Class 10 or Stronger Nuts)
10% of the
Product Records
and Maintenance
ProCore SR Series Page 2 -- 5 Product Records and Maintenance
Other Torque Specifications
*
SAE Grade 8 Steel Set Screws
Recommended Torque
Thread Size
Square Head Hex Socket
1/4 -- 20 UNC 140 + 20 in--lb 73 + 12 in--lb
5/16 -- 18 UNC 215 + 35 in--lb 145 + 20 in--lb
3/8 -- 16 UNC 35 + 10 ft--lb 18 + 3ft--lb
1/2 -- 13 UNC 75 + 15 ft--lb 50 + 10 ft--lb
Thread Cutting Screws
(Zinc Plated Steel)
Type 1, Type 23 or Type F
Thread Size Baseline Torque*
No. 6 -- 32 UNC 20 + 5in--lb
Wheel Bolts and Lug Nuts
Thread Size
7/16 -- 20 UNF
Grade 5
1/2 -- 20 UNF
Grade 5
M12 X 1.25
Class 8.8
M12 X 1.5
Class 8.8
** For steel wheels and non--lubricated fasteners.
Thread Cutting Screws
(Zinc Plated Steel)
Thread
Size
No. 6 18 20 20 + 5in--lb
Threads per Inch
Type A Type B
Recommended Torque**
65 + 10 ft--lb 88 + 14 N--m
80 + 10 ft--lb 108 + 14 N--m
80 + 10 ft--lb 108 + 14 N--m
80 + 10 ft--lb 108 + 14 N--m
Baseline Torque
No. 8 -- 32 UNC 30 + 5in--lb
No. 10 -- 24 UNC 38 + 7in--lb
1/4 -- 20 UNC 85 + 15 in--lb
5/16 -- 18 UNC 110 + 20 in--lb
3/8 -- 16 UNC 200 + 100 in--lb
Conversion Factors
in--lb X 11.2985 = N --cm N--cm X 0.08851 = in --lb
ft--lb X 1.3558 = N--m N--m X 0.7376 = ft--lb
No. 8 15 18 30 + 5in--lb
No. 10 12 16 38 + 7in--lb
No. 12 11 14 85 + 15 in--lb
* Hole size, material strength, material thickness & finish
must be considered when determining specific torque
values. All torque values are based on non--lubricated
fasteners.
ProCore SR SeriesPage 2 -- 6Product Records and Maintenance
Table of Contents
GENERAL INFORMATION 1.....................
Operator’s Manual 1..........................
SERVICE AND REPAIRS 2......................
Roller (ProCore SR54, SR54--S, SR70
and SR70--S) 2.............................
Roller (ProCore SR48 and SR72) 4.............
Roller (ProCore SR75) 6.......................
PTO Driveshaft 8.............................
PTO Driveshaft Clutch Service 10...............
PTO Driveshaft Cross and Bearing Service 12....
Hydraulic Top Link 13.........................
Covers (ProCore SR54, SR54--S, SR70
and SR70--S) 16............................
Covers (ProCore SR48 and SR72) 18...........
Covers (ProCore SR75) 20.....................
Chapter 3
Chassis
Chassis
General Information
Operator’s Manual
The Operator’s Manual provides information regarding
the operation, general maintenance and maintenance
intervals for your ProCore aerator. Refer to this publications for additional information when servicing the machine.
ProCore SR Series Page 3 -- 1 Chassis
Service and Repairs
Roller (ProCore SR54, SR54--S, SR70 and SR70--S)
PROCORE SR54 SHOWN
1
12
13
14
7
6
5
4
8
9
3
2
10
11
ANTISEIZE
LUBRICANT
ANTISEIZE
LUBRICANT
1. Aerator frame
2. Flange bearing (2 used)
3. Lock nut (2 used per bearing)
4. Roller
5. Single roller boot (2 used)
6. Lock washer (2 used)
7. Cap screw (2 used)
8. Lock washer (2 used)
9. Cap screw (2 used)
10. Scraper
NOTE: ProCore SR54 and SR 70 aerators use a single
roller with two (2) bolt flange bearings (Fig. 1). Models
SR54--S and SR70--S use two (2) rollers each supported with two (2) bolt flange bearings (Fig. 2). The procedure for removal and installation of the rollers is the
same. The ProCore SR54 is shown in Figure 1.
FRONT
RIGHT
Figure 1
11. Cap screw (2 used per bearing)
12. Cap screw (2 used)
13. Lock washer (2 used)
14. Flat washer (2 used)
Roller Removal (Fig. 1)
1. Position aerator on a firm, level surface with aerator
attached to tractor. Disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition
switch.
2. Support aerator to prevent it from moving.
3. Chock roller to prevent it from moving.
ProCore SR SeriesPage 3 -- 2Chassis
4. Loosen two (2) set screws that secure each bearing
locking collar to roller shaft (Fig. 3).
NOTE: On ProCore SR54--S and SR70--S aerators,
the rear roller scraper is secured to the frame with cap
screws that also secure the rear roller flange bearings.
When removing the rear roller on these aerators, the
roller scraper will be removed as well.
5. Remove cap screws and lock nuts that secure both
flange bearings (item 2) to aerator frame.
4. Align holes in bearing flanges with holes in roller boot
on aerator frame. Orientate bearing so that grease fittings point to front of aerator. Secure both flange bearings to frame with cap screws and lock nuts.
5. Check that roller is free to rotate and no binding exists. Center roller between bearings.
6. Apply Loctite #242 (or equivalent) to threads of bearing set screws. Tighten two (2) set screws to secure
each bearing locking collar to roller shaft ends.
6. Start engine on tractor. Slowly raise aerator while allowing roller to remain on the ground. Stop tractor engine and remove key from the ignition switch. Support
raised aerator to prevent it from lowering unexpectedly.
CAUTION
To prevent personal injury,make sure that roller
is supported as it is removed from the machine.
7. Remove roller with flange bearings from under machine.
8. Slide bearings from roller shaft ends.
Roller Installation (Fig. 1)
1. Clean roller shaft ends and apply antiseize lubricant
to shaft ends. Slide bearings onto roller shaft ends. Do
not tighten set screws in bearings at this time.
CAUTION
To prevent personal injury,make sure that roller
is supported as it is installed to the machine.
2. Position roller with flange bearings under raised aerator.
7. Lubricate grease fittings on bearings.
PROCORE SR54--S SHOWN
1
7
8
3
6
4
5
FRONT
5
4
3
Figure 2
1. Back roller
2. Main roller
3. Cap screw
4. Flange bearing
5. Lock nut
6. Double roller boot
7. Aerator frame
8. Roller scraper
Chassis
8
2
NOTE: Drop speed can be adjusted on the tractor. Refer to the Tractor Operator’s Manual for additional infor-
3
4
mation.
2
3. Start engine on tractor. Slowly lower aerator to posi-
Loctite #242
tion aerator frame to roller assembly. Stop tractor engine
and remove key from the ignition switch.
1
NOTE: On ProCore SR54--S and SR70--S aerators,
make sure to install the rear roller scraper when installing the flange bearings.
Figure 3
1. Bearing
2. Bearing housing (2 bolt)
3. Set screw (2 used)
4. Grease fitting
ProCore SR Series Page 3 -- 3 Chassis
Roller (ProCore SR48 and SR72)
1
PROCORE SR72 SHOWN
4
6
9
8
7
6
5
1. Aerator frame
2. Scraper
3. Roller
4. Cap screw
5. Flange bearing (2 used)
6. Lock nut
NOTE: The roller used on the ProCore SR48 and SR72
are very similar. The procedure for removal and installation of the roller is the same for both models. The ProCore SR72 is shown in Figure 4.
Roller Removal (Fig. 4)
1. Position aerator on a firm, level surface with aerator
attached to tractor. Disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition
switch.
4
Figure 4
2
ANTISEIZE
LUBRICANT
3
ANTISEIZE
LUBRICANT
7. Vertical roller bar (2 used)
8. Lock washer (2 used)
9. Cap screw (2 used)
FRONT
RIGHT
4. Loosen two (2) set screws that secure each bearing
locking collar to roller shaft (Fig. 5).
5. Remove four (4) cap screws and lock nuts that secure both vertical roller bars (item 7) to aerator frame.
6. Start engine on tractor. Slowly raise aerator while allowing roller assembly to remain on the ground. Stop
tractor engine and remove key from the ignition switch.
Support raised aerator to prevent it from lowering unexpectedly.
2. Support aerator to prevent it from moving.
3. Chock roller to prevent it from moving.
ProCore SR SeriesPage 3 -- 4Chassis
CAUTION
NOTE: Drop speed can be adjusted on the tractor. Re-
fer to the Tractor Operator’s Manual for additional information.
To prevent personal injury,make sure that roller
is supported as it is removed from the machine.
7. Remove roller with vertical roller b ars and flange
bearings from under machine.
8. Slide vertical roller bars and flange bearings from
roller shaft ends.
9. If necessary, remove four (4) cap screws and lock
nuts that secure flange bearings to vertical roller bars.
Separate bearings from roller bars.
Roller Installation (Fig. 4)
1. If bearings were removed from vertical roller bars,
position flange bearings to roller bars so that bearing
grease fittings will point to front of aerator after installation. Secure bearings to roller bars with four (4) cap
screws and lock nuts.
2. Clean roller shaft ends and apply antiseize lubricant
to shaft ends. Slide vertical roller bar and flange bearing
assemblies onto roller shaft ends. Do not tighten set
screws in bearings at this time.
4. Start engine on tractor. Slowly lower aerator to position aerator frame to roller assembly.Stop tractor engine
and remove key from the ignition switch.
5. Align holes in vertical roller bars with holes in aerator
frame. Make sure that bearing grease fittings point to
front of aerator. Secure both roller bars to frame with four
(4) cap screws and lock nuts.
6. Check that roller is free to rotate and no binding exists. Center roller between bearings.
7. Apply Loctite #242 (or equivalent) to threads of bearing set screws. Tighten two (2) set screws to secure
each bearing locking collar to roller shaft.
8. Lubricate grease fittings on bearings.
4
3
Loctite #242
1
2
Chassis
CAUTION
To prevent personal injury,make sure that roller
is supported as it is installed to the machine.
3. Position roller with vertical roller bars and flange bearings under raised aerator.
Figure 5
1. Bearing
2. Bearing housing (4 bolt)
3. Set screw (2 used)
4. Grease fitting
ProCore SR Series Page 3 -- 5 Chassis
Roller (ProCore SR75)
FRONT
RIGHT
1
2
3
ANTISEIZE
LUBRICANT
ANTISEIZE
LUBRICANT
5
1. Aerator frame
2. Roller
4
3. Cap screw (4 used per bearing)
4. Flange bearing (2 used)
Roller Removal (Fig. 6)
1. Position aerator on a firm, level surface with aerator
attached to tractor. Disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition
switch.
2. Support aerator to prevent it from moving.
3. Chock roller to prevent it from moving.
4. Loosen two (2) set screws that secure each bearing
locking collar to roller shaft (Fig. 7).
5. Remove four (4) cap screws and lock nuts that secure flange bearings (item 4) to aerator frame.
Figure 6
5. Lock nut (4 used per bearing)
6. Start engine on tractor. Slowly raise aerator while allowing roller assembly to remain on the ground. Stop
tractor engine and remove key from the ignition switch.
Support raised aerator to prevent it from lowering unexpectedly.
CAUTION
To prevent personal injury, make sure that roller
is supported as it is removed from the machine.
7. Remove roller with flange bearings from under machine.
ProCore SR SeriesPage 3 -- 6Chassis
8. Slide flange bearings from roller shaft ends.
Roller Installation (Fig. 6)
1. Clean roller shaft ends and apply antiseize lubricant
to shaft ends. Slide flange bearing onto roller shaft ends.
Do not tighten set screws in bearings at this time.
CAUTION
To prevent personal injury,make sure that roller
is supported as it is installed to the machine.
2. Position roller with flange bearings under raised aerator.
NOTE: Drop speed can be adjusted on the tractor. Refer to the Tractor Operator’s Manual for additional information.
3. Start engine on tractor. Slowly lower aerator to position aerator frame to roller assembly. Stop tractor engine
and remove key from the ignition switch.
2
3
Loctite #242
1
Figure 7
1. Bearing
2. Bearing housing (4 bolt)
4
3. Set screw (2 used)
4. Grease fitting
Chassis
4. Align holes in flange bearings with holes in aerator
frame. Make sure that bearing grease fittings point to
front of aerator. Secure both bearings to frame with four
(4) cap screws and lock nuts.
5. Check that roller is free to rotate and no binding exists. Center roller between bearings.
6. Apply Loctite #242 (or equivalent) to threads of bearing set screws. Tighten two (2) set screws to secure
each bearing locking collar to roller shaft.
7. Lubricate grease fittings on bearings.
ProCore SR Series Page 3 -- 7 Chassis
PTO Driveshaft
PROCORE SR54 SHOWN
FRONT
RIGHT
1
2
3
4
5
6
7
1. Gearbox
2. Driveshaft shield access panel
3. PTO driveshaft shield
4. Flat washer (4 used)
5. Lock washer (4 used)
CAUTION
The friction clutch on the PTO driveshaft may
become hot during use. To prevent personal injury, make sure that clutch has cooled before
performing any service on the driveshaft.
Removal (Fig. 8)
1. Position aerator on a firm, level surface. If aerator is
attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition
switch.
2. Unhook driveshaft shield safety chains from the tractor and the aerator driveshaft shield.
3. Support PTO driveshaft to prevent it from falling.
Figure 8
6. Cap screw (4 used)
7. PTO driveshaft
4. Separate PTO driveshaft from tractor PTO shaft (Fig.
9):
A. Pull back on locking collar to release driveshaft
from PTO shaft.
B. Slide driveshaft yoke from PTO shaft.
5. Separate PTO driveshaft from gearbox input shaft
(Fig. 10):
A. Open driveshaft shield a ccess panel to be able to
reach PTO driveshaft coupler.
B. Remove pin and lock nut from PTO driveshaft
coupler at aerator gearbox input shaft.
C. Slide driveshaft coupler from gearbox shaft.
6. Remove driveshaft from machine.
ProCore SR SeriesPage 3 -- 8Chassis
Installation (Fig. 8)
1. Apply grease to gearbox input shaft and tractor output shaft.
2. Position PTO driveshaft with clutch end toward aerator gearbox.
3. Secure PTO driveshaft coupler to gearbox input
shaft (Fig. 10):
A. Align splines of driveshaft coupler with gearbox
input shaft and slide coupler onto shaft.
B. Secure driveshaft coupler to gearbox input shaft
with pin and nut.
2
1
3
C. Close and secure driveshaft shield access panel.
4. Secure PTO driveshaft to tractor PTO shaft (Fig. 9):
A. Align splines of driveshaft yoke with tractor PTO
shaft and slide yoke onto shaft as far as possible.
B. Pull back on yoke so that locking collar secures
driveshaft to PTO shaft.
C. Check that driveshaft yoke is properly locked by
sliding yoke on PTO shaft.
5. Lubricate driveshaft grease fittings.
6. Connect driveshaft shield safety chains to the tractor
and the aerator driveshaft shield. Make sure that chains
remain slack when the aerator is raised or lowered.
Figure 9
1. Driveshaft
2. Tractor PTO shaft
1
2
3
Note: PTO driveshaft shield is
not shown in this illustration.
Figure 10
1. Driveshaft coupler
2. Gearbox input shaft
3. Locking collar
4
Chassis
3. Pin
4. Nut
ProCore SR Series Page 3 -- 9 Chassis
PTO Driveshaft Clutch Service
PROCORE SR72 SHOWN
19
18
24
20
21
11
8
8
13
26
3
2
10
16
12
23
4
24
25
1
15
9
4
5
7
5
22
14
6
17
1. Lock nut
2. Inner tube yoke
3. Inner tube
4. PTO clutch lining
5. Pressure plate
6. PTO pressure plate
7. Driving plate
8. Safety chain
9. Flange yoke
10. Outer tube cover
11. Inner tube cover
12. Bushing
13. Roll pin
14. Screw
15. Spring (8 used)
16. Connector
17. Cap screw (8 used)
18. Yoke
CAUTION
The friction clutch on the PTO driveshaft may
become hot during use. To prevent personal injury, make sure that clutch has cooled before
performing any service on the driveshaft.
Figure 11
19. Ball and collar kit
20. Yoke with tube
21. Cone shield (tractor side)
22. Splined hub
23. Cone shield (clutch side)
24. Cross and bearing kit
25. Nut (8 used)
26. Connector
NOTE: The PTO driveshaft used on SR48, SR54,
SR54--S, SR70 and SR70--S aerators include two (2)
clutch linings and fewer driveshaft components on the
aerator end of the PTO driveshaft (Fig. 12). Driveshaft
clutch service for all ProCore SR models is similar.
ProCore SR SeriesPage 3 -- 10Chassis
Clutch Disassembly (Fig. 11)
1. Position aerator on a firm, level surface. If aerator is
attached to tractor, disengage PTO, apply tractor parking brake, stop engine and remove key from the ignition
switch.
2. Remove PTO driveshaft from aerator (see PTO Driveshaft Removal in this section).
3. Remove eight (8) cap screws (item 17), nuts (item
25) and springs (item 15) that secure clutch assembly to
driveshaft flange yoke.
PROCORE SR54 SHOWN
2
2
4
3
4. Remove clutch components from driveshaft using
Figure 11 as a guide.
Clutch Assembly (Fig. 11)
1. Assemble clutch components to driveshaft using
Figure 11 as a guide.
2. Secure clutch components with eight (8) cap screws
(item 17), springs (item 15) and nuts (item 25). Tighten
nuts so that spring length is 1.125” (28.6 mm) (Fig. 13).
3. Install PTO driveshaft to aerator (see PTO Driveshaft
Installation in this section).
IMPORTANT: DO NOT overtighten nuts that tension
clutch springs on PTO driveshaft. Driveshaft clutch
is designed to slip if drive system is over--loaded. If
nuts are overtightened, driveshaft or tractor transmission damage may occur.
4. After installation is complete, check that clutch does
not slip. If clutch is slipping, tighten nuts equally in 1/4
turn increments until clutch slippage ceases.
1. PTO pressure plate
2. PTO clutch lining
4
1
Figure 12
3. PTO flange hub
4. Flange yoke
1.125” (28.6 mm)
Chassis
1
2
3
Figure 13
1. Cap screw
2. Spring
3. Nut
4. Flange yoke
ProCore SR Series Page 3 -- 11 Chassis
PTO Driveshaft Cross and Bearing Service
1. Remove PTO driveshaft from aerator (see PTO Driveshaft Removal in this section).
2. If necessary, separate PTO driveshaft and remove
shields.
IMPORTANT: When placing yoke in vise, clamp
lightly on the solid part of the yoke to prevent yoke
damage. Also, the use of a vise with soft jaws is recommended.
3. Lightly clamp yoke in vise with soft jaws. Remove
snap rings that secure bearings in each yoke. Remove
yoke from vise.
IMPORTANT: To prevent damage to driveshaft
yokes, support yokes when removing and installing
bearings.
4. Use a press to remove cross and bearings from
yokes:
A. Place a small socket against one bearing and a
large socket against the yoke on the opposite side.
B. While supporting the large socket, apply pressure on small socket to partially push the opposite
bearing into the large socket.
D. Hold cross in alignment and press bearing in until
it hits the yoke.
E. Carefully place second bearing into yoke bore
and onto cross shaft. Press bearing into yoke.
F. Install snap rings to secure bearings in place.
G. Repeat procedure for other yoke.
H. Grease cross until grease comes out of all four (4)
bearing cups.
6. Make sure that assembled joint moves without binding. Slight binding can usually be eliminated by lightly
rapping the yoke lugs with a soft faced hammer. If binding continues, disassemble joint to identify source of
binding.
7. If driveshaft was separated for cross and bearing
service, install shields and assemble driveshaft halves.
8. Install PTO driveshaft to aerator (see PTO Driveshaft
Installation in this section).
1
2
C. Remove yoke from press, grasp partially removed bearing and tap on yoke to completely remove the bearing.
D. Repeat process for remaining bearings.
E. Thoroughly clean and inspect all components.
5. To install new cross and bearings:
A. Apply a coating of grease to bearing bores of end
yoke and shaft yoke. Also, apply grease to bearings
and seal of bearing assembly. Make sure that all
bearing rollers are properly seated in bearing cage.
B. Press one bearing partially into yoke.
IMPORTANT: Take care when installing cross
into bearing to avoid damaging bearing seal.
C. Carefully insert cross into bearing and yoke.
3
1. End yoke
2. Cross and bearing kit
4
Figure 14
3. Snap ring (4 used)
4. Shaft yoke
ProCore SR SeriesPage 3 -- 12Chassis
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