wsm RC60-27BR Instruction manual

WORKSHOP MANUAL
ROTARY MOWER
RCK54-24B-EC,RCK60-24B-EC,
RCK60-27B-ECRC60-24BR,
RC60-27BR
KiSC issued 11, 2006 A

TO THE READER
This Workshop Manual has been prepared to provide servicing personnel with
information on the mechanism, service and maintenance of KUBOTA rotary mower
RCK54-24B-EC, RCK60-24B-EC, RCK60-27B-EC, RC60-24BR and RC60-27BR. It is
divided into two parts, “Mechanism” and “Servicing”
■Mechanism
Information on the Features and New Mechanisms are described. This information
should be understood before proceeding with troubleshooting, disassembling and
servicing.
■Servicing
Under the heading “General” section comes general precautions, check and
maintenance and special tools. Other section, there are troubleshooting, servicing
specification lists, checking and adjusting, disassembling and assembling, and servicing
which cover procedures, precautions, factory specifications and allowable limits.
All information, illustrations and specifications contained in this manual are based on
the latest production information available at the time of publication.
The right is reserved to make changes in all information at any time without notice.
Due to covering many models of this manual, illustration being used have not been
specificated as one model.
February 2001
© KUBOTA Corporation 2001
KiSC issued 11, 2006 A

1
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
BEFORE SERVICING AND REPAIRING
• Read all instructions and safety instructions in this
manual and on your machine safety decals.
• Clean the work area and machine.
• Park the machine on a firm and level ground, and set
the parking brake.
• Lower the implement to the ground.
• Stop the engine, and remove the key.
• Disconnect the battery negative cable.
• Hang a “DO NOT OPERATE” tag in operator
station.
SAFETY FIRST
This symbol, the industry’s “Safety Alert Symbol”, is used throughout this manual and on labels on
the machine itself to warn of the possibility of personal injury. Read these instructions carefully.
It is essential that you read the instructions and safety regulations before you attempt to repair or use
this unit.
DANGER : Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING : Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION : Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury.
■IMPORTANT : Indicates that equipment or property damage could result if instructions are not
followed.
■NOTE : Gives helpful information.
KiSC issued 11, 2006 A

2
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM SAFETY INSTRUCTIONS
SAFETY STARTING
• Do not start the engine by shorting across starter
terminals or bypassing the safety start switch.
• Do not alter or remove any part of machine safety
system.
• Before starting the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.
• Never start the engine while standing on ground.
Start the engine only from operator’s seat.
SAFETY WORKING
• Do not work on the machine while under the influence
of alcohol, medication, or other substances or while
fatigued.
• Wear close fitting clothing and safety equipment
appropriate to the job.
• Use tools appropriate to the work. Markshift tools,
parts, and procedures are not recommended.
• When servicing is performed together by two or more
persons, take care to perform all work safely.
• Do not work under the machine that is supported
solely by a jack. Always support the machine by
safety stands.
• Do not touch the rotating or hot parts while the engine
is running.
• Never remove the radiator cap while the engine is
running, or immediately after stopping. Otherwise, hot
water will spout out from radiator. Only remove
radiator cap when cool enough to touch with bare
hands. Slowly loosen the cap to first stop to relieve
pressure before removing completely.
• Escaping fluid (fuel or hydraulic oil) under pressure
can penetrate the skin causing serious injury. Relieve
pressure before disconnecting hydraulic or fuel lines.
Tighten all connections before applying pressure.
AVOID FIRES
• Fuel is extremely flammable and explosive under
certain conditions. Do not smoke or allow flames or
sparks in your working area.
• To avoid sparks from an accidental short circuit,
always disconnect the battery negative cable first and
connect it last.
• Battery gas can explode. Keep sparks and open
flame away from the top of battery, especially when
charging the battery.
• Mark sure that no fuel has been spilled on the engine.
KiSC issued 11, 2006 A

3
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM SAFETY INSTRUCTIONS
VENTILATE WORK AREA
• If the engine must be running to do some work, make
sure the area is well ventilated. Never run the engine
in a closed area. The exhaust gas contains poisonous
carbon monoxide.
PREVENT ACID BURNS
• Sulfuric acid in battery electrolyte is poisonous. It is
strong enough to burn skin, clothing and cause
blindness if splashed into eyes. Keep electrolyte
away from eyes, hands and clothing. If you spill
electrolyte on yourself, flush with water, and get
medical attention immediately.
DISPOSE OF FLUIDS PROPERLY
• Do not pour fluids into the ground, down a drain, or
into a stream, pond, or lake. Observe relevant
environmental protection regulations when disposing
of oil, fuel, coolant, electrolyte and other harmful
waste.
PREPARE FOR EMERGENCIES
• Keep a first aid kit and fire extinguisher handy at all
times.
• Keep emergency numbers for doctors, ambulance
service, hospital and fire department near your
telephone.
KiSC issued 11, 2006 A

4
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM SAFETY INSTRUCTIONS
The following safety decals are installed on the mower.
If a decal becomes damaged, illegible or is not on the mower, replace it. The decal part number is listed in
the parts list.
SAFETY DECALS
KiSC issued 11, 2006 A

5
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM SAFETY INSTRUCTIONS
CARE OF DANGER, WARNING AND CAUTION LABELS
1. Keep danger, warning and caution labels clean and free from obstructing material.
2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.
3. Replace damaged or missing danger, warning and caution labels with new labels from your KUBOTA
Distributor.
4. If a component with danger, warning or caution label(s) affixed is replaced with new part, make sure the
label(s) is (are) attached in the same location (s) as the replaced component.
5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any
bubbles to outside edge.
ENTRETIEN DES ETIQUETTES DE DANGER, D’AVERTISSEMENT ET D’ATTENTION
1. Conserver les étiquettes de danger, d’avertissement et d’attention propres et exemptes d’un matériel
d’obstruction.
2. Nettoyer les étiquettes de danger, d’avertissement et d’attention avec de l’eau et du savon, puis les essuyer
avec un tissu doux.
3. Remplacer les étiquettes de danger, d’avertissement et d’attention endommagées ou manquantes par des
étiquettes neuves de chez votre distributeur KUBOTA.
4. Si un élément mentionné par des étiquettes de danger, d’avertissement ou d’attention est remplacé par une
pièce neuve, s’assurer que les étiquettes soient placées au(x) même(s) endroit(s) que l’élément remplacé.
5. Placer une étiquette neuve de danger, d’avertissemant ou d’attention en l’appliquant sur une surface sèche
et propre et en appuyant dessus pour y éliminer vers le bord extérieur les bulles d’air qui peuvent s’ y
trouver.
ACHTEN SIE AUF DIE ERHALTUNG DER WARN- UND HINWEIS-AUFKLEBER
1. Die Warn- und Hinweis- Aufkleber sauber und lesbar halten.
2. Die Aufkleber mit Seife und Wasser waschen und sie mit einem weichen Tuch abtrocknen.
3. Beschädigte oder verlorengegangene Aufkleber durch neue Original-Schilder von lhrem KUBOTA Verteiler
ersetzen.
4. Falls ein Bauteil mit Warn- und / oder Hinweis-Aufklebern durch ein Neuteil ersetzt wurde, darauf achten,
daß das Neuteil die gleichen Aufkleber besitzt oder erhält.
5. Beim Erneuern von Aufklebern darauf achten, daß der Untergrund sauber, trocken und fettfrei ist. Etwaige
Blasen nach außen drücken.
KiSC issued 11, 2006 A

6
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM TERMINOLOGY
TERMINOLOGY
(1) Front Gauge Wheel
(2) Belt Cover (Left)
(3) Gear Box
(4) Belt Cover (Right)
(5) Discharge Chute
(6) Deck
(7) Universal Joint
(8) Outer Blade
(9) Front Anti-scalp Roller
(10) Center Blade
(11) Outer Blade
(12) Rear Anti-scalp Roller
(13) Rear Gauge Wheel
(14) Anti-scalp Wheel
KiSC issued 11, 2006 A

7
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM TERMINOLOGY
(1) Front Gauge Wheel
(2) Belt Cover (Left)
(3) Gear Box
(4) Belt Cover (Right)
(5) Deck
(6) Universal Joint
(7) Outer Blade
(8) Front Anti-scalp Roller
(9) Center Blade
(10) Outer Blade
(11) Skid
(12) Rear Gauge Wheel
KiSC issued 11, 2006 A

8
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM SPECIFICATIONS
SPECIFICATIONS
W1027634
W1028910
Model RCK54-24B-EC RCK60-24B-EC RCK60-27B-EC
Suitable tractor B1710, B2110, B2410 B2710
Type Side discharge rotary mower
Mounting method Parallel linkage
Adjustment of cutting height Gauge wheel
Cutting width 1372 mm (54 in.) 1524 mm (60 in.)
Cutting height 38 to 102 mm (1.5 to 4.0 in.)
Weight (Approx.) 156 kg (344 lbs) 158 kg (348 lbs)
Blade spindle speed 50.0 r/s (3000 rpm) 44.7 r/s (2680 rpm)
Blade tip velocity 74.6 m/s (14680 fpm) 73.4 m/s (14439 fpm)
Blade length 475 mm (18.7 in.) 523 mm (20.6 in.)
Number of blades 3
Dimensions Total length 1072 mm (42.2 in) 1100 mm (43.3 in.) 1060 mm (41.7 in.) Total width 1695 mm (66.7 in.) 1881 mm (74.0 in.)
Total height 345 mm (13.6 in.)
Model RCK60-24BR RC60-27BR
Suitable tractor B1710, B2110, B2410 B2710
Type Rear discharge rotary mower
Mounting method Parallel linkage
Adjustment of cutting height Gauge wheel
Cutting width 1524 mm (60 in.)
Cutting height 25 to 89 mm (1.0 to 3.5 in.)
Weight (Approx.) 154 kg (336 lbs) 158 kg (348 lbs)
Blade spindle speed 49.5 r/s (2970 rpm)
Blade tip velocity 81.3 m/s (15995 fpm)
Blade length 520 mm (20.5 in.)
Number of blades 3
Dimensions Total length 1122 mm (44.2 in) 1175 mm (46.3 in.) Total width 1613 mm (63.5 in.)
Total height 348 mm (13.7 in.)
KiSC issued 11, 2006 A

CONTENTS
GENERAL
1. MOWER IDENTIFICATION............................................................................. G-1
2. GENERAL PRECAUTION .............................................................................. G-2
3. LUBRICANTS .................................................................................................. G-3
4. TIGHTENING TORQUES (GENERAL USE SCREWS, BOLTS AND
NUTS) .............................................................................................................. G-4
5. MAINTENANCE CHECK LIST....................................................................... G-5
6. CHECK AND MAINTENANCE....................................................................... G-6
[1] CHECK POINTS OF DAILY OR EACH USE....................................... G-6
[2] CHECK POINT OF INITIAL 50 HOURS ............................................... G-9
[3] CHECK POINTS OF EVERY 50 HOURS........................................... G-10
[4] CHECK POINT OF EVERY 150 HOURS ........................................... G-11
[5] CHECK POINT OF EVERY 2 YEARS................................................ G-11
7. SETTING UP MOWER ................................................................................ G-12
KiSC issued 11, 2006 A

G-1
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
1. MOWER IDENTIFICATION
When contacting your local KUBOTA distributor, always specify
mower serial number.
W1020623
(1) Mower Serial Number (A) RCK54-24B-EC, RCK60-24B-EC,
RCK60-27B-EC
(B) RC60-24BR, RC60-27BR
KiSC issued 11, 2006 A

G-2
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
2. GENERAL PRECAUTION
• During disassembly, carefully arrange removed parts in a clean
area to prevent confusion later. Screws, bolts and nuts should be
installed in their original position to prevent reassembly errors.
• When special tools are required, use KUBOTA genuine special
tools. Special tools which are not frequently used should be
made according to the drawings provided.
• Use KUBOTA genuine parts or KUBOTA-recommended parts
and lubricants or their equivalents.
• Gaskets and o-rings must be replaced during reassembly.
• Apply grease to new o-rings or oil seals before assembling. See
the figure.
• When reassembling external snap rings or internal snap rings,
they must be positioned so that sharp edge faces against the
direction from which a force is applied. See the figure.
• Metric screws, bolts and nuts are not interchangeable with
nonmetric fasteners.
• Remove oil and dirt from parts before measuring.
W1020761
(1) Grease
(2) Force
(3) Sharp Edge
(A) Oil Seal
(B) External Snap Ring
(C) Internal Snap Ring
KiSC issued 11, 2006 A

G-3
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
3. LUBRICANTS
No. Place Capacity Lubricants
1 Gear Box 0.36 L 0.38 U.S.qts.
0.32 lmp.qts.
SAE 90 gear oil
(API Service GL-5 gear oil)
Greasing
2 Universal joint
Until grease overflows SAE multi-purpose type grease
3Spindle shafts
(Bevel gear shaft and blade shafts)
4 Belt tension pulley
5 Belt tension pivot
6Lifearms
7 Front gauge wheels
8 Rear gauge wheels
9 Front center anti-scalp roller
10 Middle lift arm (B1710, B2110,
B2410 with lift cylinder type)
11 Lift cylinder joint pin
(with lift cylinder type)
KiSC issued 11, 2006 A

G-4
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
4. TIGHTENING TORQUES (GENERAL USE SCREWS,
BOLTS AND NUTS)
Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened
according to the table below.
W1034542
W1022485
Indication on top of
bolt No-grade or 4T 7T 9T
Material of bolt SS400, S20C S43C, S48C SCr435,
SCM435
Material of opponent
part Ordinariness Aluminum Ordinariness Aluminum Ordinariness
Unit
Diameter N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M6
(6 mm, 0.24 in.)
7.85
to
9.31
0.80
to
0.95
5.79
to
6.87
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
9.81
to
11.2
1.00
to
1.15
7.24
to
8.31
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
12.3
to
14.2
1.25
to
1.45
9.05
to
10.4
M8
(8 mm, 0.31 in.)
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
16.7
to
19.6
1.7
to
2.0
12.3
to
14.4
23.6
to
27.4
2.4
to
2.8
17.4
to
20.2
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
29.5
to
34.3
3.0
to
3.5
21.7
to
25.3
M10
(10 mm, 0.39 in.)
39.3
to
45.1
4.0
to
4.6
29.0
to
33.2
31.4
to
34.3
3.2
to
3.5
23.2
to
25.3
48.1
to
55.8
4.9
to
5.7
35.5
to
41.2
39.3
to
44.1
4.0
to
4.5
29.0
to
32.5
60.9
to
70.6
6.2
to
7.2
44.9
to
52.0
M12
(12 mm, 0.47 in.)
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5 –––
77.5
to
90.2
7.9
to
9.2
57.2
to
66.5
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
103
to
117
10.5
to
12.0
76.0
to
86.7
M14
(14 mm, 0.55 in.)
108
to
125
11.0
to
12.8
79.6
to
92.5 –––
124
to
147
12.6
to
15.0
91.2
to
108 –––
167
to
196
17.0
to
20.0
123
to
144
M16
(16 mm, 0.63 in.)
167
to
191
17.0
to
19.5
123
to
141 –––
197
to
225
20.0
to
23.0
145
to
166 –––
260
to
304
26.5
to
31.0
192
to
224
M18
(18 mm, 0.71 in.)
246
to
284
25.0
to
29.0
181
to
209 –––
275
to
318
28.0
to
32.5
203
to
235 –––
344
to
402
35.0
to
41.0
254
to
296
M20
(20 mm, 0.79 in.)
334
to
392
34.0
to
40.0
246
to
289 –––
368
to
431
37.5
to
44.0
272
to
318 –––
491
to
568
50.0
to
58.0
362
to
419
Grade
Unit
Nominal Diameter
SAE GR.5 SAE GR.8
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
5/16 23.1 to 27.8 2.35 to 2.84 17.0 to 20.5 32.5 to 39.3 3.31 to 4.01 24.0 to 29.0
3/8 47.5 to 57.0 4.84 to 5.82 35.0 to 42.0 61.0 to 73.2 6.22 to 7.47 45.0 to 54.0
1/2 108.5 to 130.2 11.07 to 13.29 80.0 to 96.0 149.2 to 179.0 15.22 to 18.27 110.0 to 132.0
9/16 149.2 to 179.0 15.22 to 18.27 110.0 to 132.0 217.0 to 260.4 22.14 to 26.57 160.0 to 192.0
5/8 203.4 to 244.1 20.75 to 24.91 150.0 to 180.0 298.3 to 358.0 30.44 to 36.53 220.0 to 264.0
KiSC issued 11, 2006 A

G-5
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
5. MAINTENANCE CHECK LIST
To keep the mower working in good condition as well as to avoid any accident and trouble, carry out periodic
inspection and maintenance. Check the following points before use.
W1013580
Service interval Check points Reference
Page
Daily (Each use) • Anything unusual in previous day’s operation
• Make sure mower blade screws are tighten
• Check mower blades for wear or damage
• Check gear box oil level
• Check oil leaks
• Check all hardware
• Make sure all pins are in place
• Clean mower deck
• Apply grease to universal joint
• Apply grease to spindle shafts (Bevel gear shaft and blade shafts)
• Apply grease to belt tension pulley
• Apply grease to belt tension pivot
• Apply grease to front center anti-scalp roller
• Apply grease to lift arms
–
G-6
S-4
G-7
–
–
–
–
G-8
G-8
G-8
G-8
G-10
G-8, 10
Initial 50 hours • Change gear box oil G-9
Every 50 hours • Apply grease to front and rear gauge wheels
• Apply grease to middle lift arm
• Apply grease to lift cylinder joint pin
• Check mower belt
G-10
G-10
G-10
S-4
Every 150 hours • Change gear box oil G-9
Every 2 years
(After purchase) • Replace gear box oil seal G-11
KiSC issued 11, 2006 A

G-6
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
6. CHECK AND MAINTENANCE
[1] CHECK POINTS OF DAILY OR EACH USE
Retightening Mower Blade Screw
CAUTION
• To avoid injury, always handle the mower blade with care.
1. Dismount the mower and turn it over to expose the mower
blades.
2. Wedge a block of wood securely between the mower blade and
mower deck.
3. Retighten the mower blade screw to the specified torque.
4. If the mower blade screw is worn or broken, replace it.
NOTE■
• The RC60-24BR and RC60-27BR mower blade screw has
left-hand threads.
Turn it counterclockwise to tighten.
W1025290
Checking Mower Blade
1. See page S-4. W1025440
Tightening torque Mower blade screw 98.1 to 117.1 N·m 10.0 to 12.0 kgf·m
72.3 to 86.8 ft-lbs
(1) Mower Blade Screw (A) RCK54-24B-EC, RCK60-24B-EC,
RCK60-27B-EC
(B) RC60-24BR, RC60-27BR
KiSC issued 11, 2006 A

G-7
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
Checking Gear Box Oil Level
1. Place the mower on level ground.
2. Loosen the check plug (2), and check to see if oil seems from the
opening.
3. If the oil level is low, remove the oil filler plug (1) and add new
gear oil.
IMPORTANT■
• Use the specified gear oil.
Refer to “LUBRICANTS”. (See page G-3.)
W1025491
(1) Oil Filler Plug
(2) Check Plug
(3) Drain Plug
(A) RCK54-27B-EC, RCK60-24B-EC
(B) RCK60-27B-EC
(C) RC60-24BR, RC60-27BR
KiSC issued 11, 2006 A

G-8
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
Greasing
1. Apply grease to the following points as figures.
(1) Bevel Gear Shaft
(2) Blade Shaft
(3) Belt Tension Pulley
(4) Belt Tension Pivot
(5) Lift Arm
(6) Spline of Universal Joint
(7) Universal Joint
(A) RCK54-24B-EC, RCK60-24B-EC,
RCK60-27B-EC
(B) RC60-24BR, RC60-27BR
KiSC issued 11, 2006 A

G-9
RCK54/60-24B-EC · RCK60-27B-EC · RC60-24/27BR, WSM G GENERAL
[2] CHECK POINT OF INITIAL 50 HOURS
Changing Gear Box Oil
1. Dismount the mower from the tractor, and place the mower on
level ground.
2. Remove the oil filler plug (1).
3. Remove the drain plug (3), and drain the used oil completely.
4. After draining the used oil, reinstall the drain plug.
5. Fill with new oil up to the specified level.
IMPORTANT■
• Use the specified gear oil.
Refer to “LUBRICANTS”. (See page G-3.)
W1028353
(1) Oil Filler Plug
(2) Check Plug
(3) Drain Plug
(A) RCK54-24B-EC, RCK60-24B-EC
(B) RCK60-27B-EC
(C) RC60-24BR, RC60-27BR
KiSC issued 11, 2006 A