Buhler FK372 User Manual

Series 1 Rotary Cutter

TABLE OF CONTENTS

DESCRIPTION PAGE

Warranty.....................................................................1

Introduction................................................................2

SAFETY.......................................................................3

Safety................................................................3

General Safety..................................................4

Start Up Safety.................................................. 4

Operation Safety...............................................4

Transport Safety................................................4

Service & Maintenance Safety..........................5

Storage Safety ..................................................5

Safety Signs......................................................5

Safety Sign Installation......................................5

ASSEMBLY.................................................................7

Assembly Instructions.......................................7

Chain Kit Assembly Instructions........................7

OPERATION ...............................................................8

Operating Instructions....................................... 8

Theory of Operation..........................................9

MAINTENANCE ..........................................................10

Service..............................................................10

Bolt Torque .......................................................11

PARTS LISTS

4’ & 5’ Series 1 Rotary Cutter Drawing..............12

4’ & 5’ Series 1 Rotary Cutter Parts List............13

Series 1 Rotary Cutter Chain Kit.......................15

Rotary Cutter PTO Shaft................................... 16

Model #410 Series 1

Rotary Cutter Gearbox Drawing.............17

Model #410 Series 1

Rotary Cutter Gearbox Parts List ...........18

Model #510 Rotary Cutter Gearbox Drawing....19

Model #510 Rotary Cutter Gearbox Parts List ..20

SHIPPING KIT AND BUNDLE NUMBERS.................21

Series 1 Rotary Cutter

WARRANTY POLICY

Buhler Manufacturing products are warranted for a period of twelve (12) months (90 days for
commercial application) from original date of purchase, by original purchaser, to be free from
defects in material and workmanship under correct, normal agricultural use and proper
applications.

Buhler Manufacturing’s obligations under this warranty shall be limited to the repair or
exchange, at Buhler Manufacturing’s option, of any Buhler Manufacturing product or part which
proves to be defective as provided. Buhler Manufacturing reserves the right to either inspect
the product at the buyer’s location or have it returned to the factory for inspection.

The above warranty does not extend to goods damaged or subject to accident, abuse or misuse
after shipment from Buhler Manufacturing’s factory, nor to goods altered or repaired by anyone
other than an authorized Buhler Manufacturing representative.

Buhler Manufacturing makes no Express Warranties other than those, which are specifically
described. Any description of goods, including any references and specifications in catalogues,
circulars and other written material published, is for the sole purpose of identifying goods and
shall conform to such descriptions. Any sample or model is for illustrative purposes only and
does not create an Express Warranty that the goods conform to sample or model shown.

The purchaser is solely responsible for determining suitability of goods sold. This warranty is
expressly in lieu of all other warranties expressed or implied. Buhler Manufacturing will in no
event be liable for any incidental or consequential damages whatsoever. Nor for any sum in
excess of the price received for the goods for which liability is claimed.

WARRANTY CLAIMS:

Warranty requests must be prepared on Buhler Manufacturing Warranty Claim Forms with all
requested information properly completed. Warranty Claims must be submitted within a thirty
(30) day period from date of failure repair.

WARRANTY LABOR:

Any labor subject to warranty must be authorized by Buhler Manufacturing. The labor rate for
replacing defective parts, where applicable, will be credited at 100% of the dealer’s posted shop
rate. Defective parts will receive an extra 10% discount to assist with freight or other incidental
costs.

GOVERNMENT LEGISLATION:

Warranty terms and conditions are subject to Provincial or State legislation.

IMPORTANT FACTS:

Buckets and Bucket Tines Carry No Warranty
Bent Spears Carry No Warranty
Snowblower Fan Shafts Carry No Warranty
Mower Blades Carry No Warranty
Portable Auger Parts Have Two (2) Year Warranty
Loader Parts Have Two (2) Year Warranty

IMPORTANT NOTE: This warranty does not apply to rentals

1

Series 1 Rotary Cutter

INTRODUCTION

The Buhler Farm King Series 1 Rotary cutter available in 48” and 60” and is equipped
with a 3-point hitch. The 3-point hitch is Buhler Quick Hitch compatible so it is easy to
attach and unhook. 3-point hitch models include a single solid rubber training wheel.

Buhler Farm King Rotary Cutters are built tough and made to last. The blades are heat­treated to enhance rigidity and the heavy-duty gearbox is designed to be rugged and
durable. The access panel on the deck makes it easy to inspect or replace the blades.
An optional chain kit minimizes the possibility of flying debris.

Keep this manual handy for frequent reference. All new operators or owners must
review the manual before using the equipment and at least annually thereafter. Contact
your Buhler Dealer if you need assistance, information, or additional copies of the
manual. Visit our website at

The directions left, right, front and rear, as mentioned throughout this manual, are as
seen facing in the direction of travel of the implement.

www.buhler.com for a complete list of dealers in your area.

2

Series 1 Rotary Cutter

SAFETY

Remember, YOU are the key to safety. Good safety practices not only protect you, but
also the people around you. Make these practices a working part of your safety
program. Be certain that everyone operating this equipment is familiar with the
recommended operating and maintenance procedures and follows all the safety
precautions. Most accidents can be prevented. Do not risk injury or death by ignoring
good safety practices.

The alert symbol is used throughout this manual. It indicates attention is required and
identifies hazards. Follow the recommended precautions.

T

ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!

CAUTION

The caution symbol indicates a potentially hazardous situation that, if not

avoided, may result in minor or moderate injury. It may also be used to
alert against unsafe practices.

he safety alert symbol means…

WARNING

The Warning Symbol indicates a potentially hazardous situation that, if
not avoided, could result in death or serious injury, and includes hazards
that are exposed when guards are removed. It may also be used to alert
against unsafe practices.

DANGER

The Danger Symbol indicates an imminently hazardous situation that, if
not avoided will result in death or serious injury. This signal word is to be
limited to the most extreme situations, typically for machine components
that, for functional purposes, cannot be guarded.

3

Series 1 Rotary Cutter

GENERAL SAFETY INSTRUCTIONS

Have a first-aid kit available for use and know how to use it. Have a fire extinguisher
available, stored in a highly visible location, and know how to use it. Wear appropriate
protective gear. This list may include but is not limited to:

- hard hat

- protective shoes with slip resistant soles

- protective glasses or goggles

- heavy gloves

- wet weather gear

- hearing protection

- respirator or filter mask

Read and understand the Operator’s Manual and all safety signs before operating,
servicing, adjusting, repairing, or unplugging the equipment. Do not attempt any
unauthorized modifications to your Buhler product as this could affect function or safety,
and could affect the life of the equipment. Inspect and clean the working area before
operating. Ensure bystanders are clear of the area before operating.

START UP SAFETY

Do not let inexperienced operators or children run this equipment.
Place all tractor and machine controls in neutral before starting.
Operate only with ROPS and seatbelt equipped tractors.
Do not operate inside a building unless there is adequate ventilation.
Ensure all shields are in place and in good condition before operating.
Stay clear of PTO shaft and machine when engaging PTO.

OPERATION SAFETY

Do not permit riders.
Do not wear loose fitting clothing during operation.
Never operate over 540 rpm PTO speed.
Never operate the equipment in the raised position.

TRANSPORT SAFETY

Review Transport Safety instructions in tractor manual before moving.
Check with local authorities regarding transport on public roads. Obey all applicable
laws and regulations.
Make sure the SMV (Slow Moving Vehicle) emblem and all the lights and reflectors that
are required by the local highway and transport authorities are in place, are clean, and
can be seen clearly by all overtaking and oncoming traffic.
Never have the equipment in operation during transport.
Always travel at a safe speed.
Inflate transport tires to recommended pressure.

4

Series 1 Rotary Cutter

SERVICE AND MAINTENANCE SAFETY

Stop engine, set brake, remove ignition key, and wait for all moving parts to stop before
servicing, adjusting, repairing, or unplugging.
Support the equipment with blocks or safety stands before working beneath it.
Follow good shop practices including:

- keep service area clean and dry

- be sure electrical outlets and tools are properly grounded

- use adequate light for the job

Use only tools, jacks, and hoists of sufficient capacity for the job.
Replace and secure all shields removed during serving before operating.
Use heavy leather gloves to handle sharp objects.
Check hydraulics regularly for leaks. Use cardboard to look for leaks, and use hand
and eye protection.
Relieve pressure on hydraulic system before repairing or adjusting.
Failure to follow proper procedures when mounting a tire on a wheel or rim can produce
an explosion, which may result in serious injury or death.

STORAGE SAFETY

Store the unit in an area away from human activity.
Do not permit children to play on or around the stored machine.
Support the frame on stands and blocks to provide a secure base.

SAFETY SIGNS

The following illustration shows the approximate location and detail of safety signs.
Keep all safety signs clean and legible and replace any that are damaged or missing.
When original parts are replaced, any safety signs affixed to those parts should be
replaced as well. Replacement safety signs are available from your local dealer.

INSTALLATION

To install safety signs, ensure the installation area is clean and dry. Decide on the
exact position before you remove the backing paper. Remove the smallest portion of
the split backing paper and align over the specified area. Carefully press in place.
Slowly peel back the remaining paper and smooth the remaining portion in place. Small
air pockets can be pierced with a pin and smoothed out.

5

Series 1 Rotary Cutter

SERIES 1 ROTARY CUTTER SAFETY SIGNS

Replace safety sign immediately should it become damaged, torn or illegible. Obtain
replacements from your authorized dealer using the part numbers shown.

#1 #4

#2 #3

6

Series 1 Rotary Cutter

ASSEMBLY INSTRUCTIONS

1. Raise the hitch arms (#4) and the hitch supports (#5) from the deck. Remove the
bolt holding on the top link (#6). Line up the end holes on the hitch supports with
the holes on the outside of the hitch arms where you just removed the bolt. Bolt
the hitch arms, hitch supports and top link together with the bolt you just removed
using two flat washers and a lock nut.

2. Connect the PTO shaft to the gearbox. A snap ring holds on the PTO shaft with
a shear pin. Make sure the PTO guard (#3) is bolted in place.

3. Re-check all the fasteners. There should be free movement of all pieces held
together by a bolt and lock nut.

CHAIN KIT - ASSEMBLY INSTRUCTIONS

All cutters have the required holes for mounting the chain kit. The use of this chain kit
will help reduce the possibility of injury to persons or property by stopping many thrown
objects.

1. Bolt the front chain holder (#1) to the front of the cutter using 3/8” x 1" hex bolts,
lock washers, flat washers and hex nuts.

2. Use ¼” x 5 link chains (#8) at the front. A chain is pushed through each slot from
underneath and a 3/8" rod is threaded through the top link of each chain. Hold
rods in place using the cotter pins supplied. See parts list for correct length of
rods.

3. Bolt the rear center (#3) and rear side (#4 & #5) chain holders to the rear of the
cutter. Use ¼” x 5 link chains (#8) along all rear edges. Thread rods as in front
using lengths as shown in parts list.

7

Series 1 Rotary Cutter

OPERATING INSTRUCTIONS

1. Connecting to tractor: All cutters are supplied with a standard 1 3/8" 6-spline

yoke on the PTO shaft.

Warning: This cutter is designed to operate only with a 540 rpm PTO. After
connecting cutter to tractor and before doing any cutting, check to see that the
PTO shaft is not touching anywhere on the cutter when raising and lowering or
when cornering.

2.

3.

4.

to harvest.

PTO Shafts: Make sure the length of the PTO shaft is compatible with different
working positions of the cutter. Carefully follow the lubrication chart supplied with
the PTO shaft. When cutting, avoid joint angles over 35º. PTO shafts should be
disengaged when turning sharp corners. Using tape or a bright colored marking
pen, mark on the outer shields the position where the shaft is completely pushed
together and the position where you have a 4" overlap. Watch these marks when
moving the cutter through all possible operating angles to see that the PTO shaft
stays within this range.

PTO shafts with shear pin - Loosen the outer shield on the implement end of the
PTO and push the gearbox shaft through the end yoke. Using snap ring pliers,
put the snap ring on the end of the gearbox shaft. This is what keeps the PTO
shaft on if the shear pin breaks and the cutter should
Insert a ½” x 3 ½”
shields.

Operating tractor engine: Operate the tractor PTO at 540 rpm when doing
normal cutting. If the forward speed is too high, a lower gear can be used.

Cutting: The cutter should be run with the front end a little low or just level for
normal light cutting. For brush or dense tall weeds, running front end high may
give a better shredding job. On rough ground, the front end will also tend to dig
in less. The cutter can also be used to shred stubble or top vegetables prior

Grade 2 bolt with a lock nut to act as shear pin and replace all

not be used without it.

8

Series 1 Rotary Cutter

THEORY OF OPERATIONS

9

LUBRICATION

1.

Gearbox: The gearbox should be filled with SAE90 oil to the bottom edge of the
lower oil plug when shipped. Check this before using the cutter and at regular
intervals to see that this oil level is maintained.

Series 1 Rotary Cutter

MAINTENANCE

SERVICING INSTRUCTIONS

2. Grease wheels, tail wheel spindle sleeve, universal joints and shield bushings on
the PTO shaft after every eight hours of use. Lubricate the telescoping PTO tube
and the PTO quick release about every twenty hours of use.

3.

4.

Shielding: Always keep all shielding in place and repair or replace if damaged.
Blades: When replacing or grinding the cutting blades, both blades must be

replaced or reground at the same time to maintain the proper balance in the
cutting unit.
IMPORTANT: Use Buhler replacement blades only. Using substitute blades
may be dangerous. When changing blades, open the access door on the deck
and take the screws out of the blades. Replacing the new or sharpened blades
is done with the back of the mower raised and securely blocked so it will not fall.
Bolt on the blades and close the access door.

10

Series 1 Rotary Cutter

11

Series 1 Rotary Cutter

4’ & 5’ SERIES 1 ROTARY CUTTER

12

Series 1 Rotary Cutter

WHEN ORDERING PARTS

Always give your dealer the Model, Color and Serial Number of your machine to assist
him in ordering and obtaining the correct parts. Use the exploded view and tabular
listing of the area of interest to exactly identify the required part.

4' & 5' SER 1 ROTARY CUTTER

ITEM PART # DESCRIPTION

1 25312 Deck Weldment - 4'

25311 Deck Weldment - 5'

25315 Tail Wheel Bracket Weldment - 4' & 5'
3 117213 PTO Guard - 4' & 5'
4 116783 Hitch Arm 4' & 5'
5 116831 Hitch Support 4'

116794 Hitch Support 5'
6 116784 Top Link 4' & 5'
7 116777 Hitch Spacer 4' & 5'
8 84299 5/8" x 2" Hex Bolt
9 84270 5/8" x 1 3/4" Hex Bolt

10 81672 5/8" x 4 1/2" Hex Bolt
12 812482 5/8" Lock Nut
13 81677 5/8" Lock Washer
14 81676 5/8" Hex Nut
15 814425 Gearbox Assembly (Shear Pin) 4'

966108 Gearbox Assembly (Shear Pin) 5'

16 966534 Access Door
17 84217 3/8" Wing Nut
19 81593 3/8" Lock Washer
21 81569 5/16" Lock Washer
22 81549 5/16" x 3/4" Hex Bolt
23 965807 Top Link Pin (Category 1)
24 965809 Lift Arm Pin w/ Nut & Washer (Category 1)
25 965911 7/16" Linch Pin
26 81723 7/8" Lock Washer
27 81722 7/8" Hex Nut
28 906416 Hitch Bushing (1 1/4"OD x 1"ID x 7/16")
29 F0879 PTO Shaft (Shear Pin) 4' & 5'
30 909767 Wheel Yoke
31 909768 M24 x 2 x 186 Spindle Bolt
32 909769 M24 x 2 Spindle Nut
33 909770 Spindle Cotter Pin
34 909771 15" Wheel w/ Rim
35 909772 4 Bolt Hub w/ Bushing

13

Series 1 Rotary Cutter

36 909773 M12 X 1.75 X 25 Hex Bolt
37 909774 Lug Bolt Flat Washer
38 116786 Spacer 1 1/4"ID x 1 3/4"OD x 1/2"
39 84583 1/8" Drive in Grease Fitting
40 81210 1/4" x 2" Cotter Pin
41 967110 1 1/4"ID x 14 Ga Narrow Rim Washer
42 814511 Blade (18") - 4' (standard)

966519 Blade (24") - 5' (standard)

43 116901 Blade Bar Weldment - 4' & 5'
44 81249 3/16" x 2 1/2" Cotter Pin
45 814526 1" Slotted Hex Nut
46 116829 Blade Spacer 4' & 5'
47 814527 1.06 ID x 2.50 OD Flat Washer
48 116834 1" x 3 1/4" Hex Bolt
49 909786 1" Slotted Hex Nut - 4'

967217 1" Slotted Hex Nut - 5'

50 909785 5 x 45 Cotter Pin - 4'

966562 85mm x 50mm Cotter Pin - 5'

51 81972 7/8" Flat Washer

14

Series 1 Rotary Cutter

SER 1 ROTARY CUTTER CHAIN KIT

SER 1 ROTARY CUTTER - CHAIN KIT

ITEM PART # DESCRIPTION

1 25331 Front Chain Holder, 4' (48'' Long)

25313 Front Chain Holder, 5' (60'' Long)

2 116888 Front Chain Rod, 4' (3/8'' x 48'')

116795 Front Chain Rod, 5' (3/8'' x 60'')

3 117021 Rear Center Chain Holder, 4' (24.23'' Long)

117024 Rear Center Chain Holder, 5' (29.86'' Long)

4 117023 R.H. Rear Side Chain Holder, 4' (19.93'' Long)

117026 R.H. Rear Side Chain Holder, 5' (24.55'' Long)

5 117022 L.H. Rear Side Chain Holder, 4' (19.93'' Long)

117025 L.H. Rear Side Chain Holder, 5' (24.55'' Long)

6 116793 Rear Center Chain Rod, 4' (3/8'' x 23 1/2'')

116792 Rear Center Chain Rod, 5' (3/8'' x 29'')

7 119889 Rear Side Chain Rods, 4' (3/8'' x 19 1/2'')

116793 Rear Side Chain Rods, 5' (3/8'' x 23 1/2'')
8 966596 1/4'' x 5 Link Plated Chain
9 86170 3/8'' x 1'' Hex Bolt

10 81593 3/8'' Lock Washer
11 813507 3/8'' Hex Nut
12 81570 3/8" Flat Washer
13 9812430 1/8'' x 1'' Cotter Pin

15

Series 1 Rotary Cutter

MODEL #410 & #510 SERIES 1 ROTARY CUTTER PTO SHAFT

MODEL #410 & #510 (SHEAR PIN) - SERIES 1

ITEM # PART # DESCRIPTION

F0879 Shaft Complete
1 907186 Quick Disconnect Yoke (6 Spline) 540rpm
2 966211 Repair Kit
3 936344 Outer Tube W/ Yoke
4 936345 Inner Tube W/ Yoke
5 966216 Shear Yoke
6 909766 Shield Kit
7 9812034 Shear Bolt 1/2" x 3 1/2" Gr 2
8 812364 Nutlk (Steel) 1/2" Grb (pl)

16

Series 1 Rotary Cutter

MODEL #410 SERIES 1 ROTARY CUTTER GEARBOX

17

Series 1 Rotary Cutter

MODEL #410 GEARBOX - SERIES 1

ITEM # PART # DESCRIPTION

814425 Gearbox Assembly
1 909785 Cotter Pin 5 x 45
2 909786 Blade Nut
3 909787 Washer - Blade Hub
4 909788 Blade Hub
5 909789 Shaft - Output
6 909790 Oil Seal 1.56 x 2.215 x 0.375
7 909791 Bolt - Output Cap
8 909792 Spring Washer
9 909793 Output Cap

10 909794 Gasket - Output Cap
11 909795 Housing
12 909796 Spacer - Bearing
13 909797 Retaining Ring - Output Shaft
14 909798 Bearing 6208
15 909799 Gasket - Input Cap
16 909800 Bearing 6207
17 909801 Input Cap
18 909802 Input Gear
19 909803 Retaining Ring - Input Shaft
20 909804 Oil Seal 1.35 x 2.215 x 0.375
21 909805 Input Shaft
22 909806 Vent Plug
23 909807 Pipe Plug 1/8"

18

Series 1 Rotary Cutter

MODEL #510 ROTARY CUTTER GEARBOX

19

Series 1 Rotary Cutter

MODEL #510 GEARBOX - SERIES 1 & 2

ITEM # PART # DESCRIPTION

966108 Gearbox Assembly
1 914018 Housing
2 914006 Cap - Input
3 914015 Cap - Output
4 904022 Gear - Output, w/Shaft 15T
5 904021 Gear - Input 22T
6 966824 Shaft - Input 1 3/8"
7 966542 Bearing - Ball 207K
8 966555 Bearing - Ball 208K
9 914005 Seal - Input 3LIP

10 914013 Seal - Output 3LIP
11 914019 Gasket - Output Cap
12 914007 Gasket - Input Cap
13 914001 Spacer
14 966562 Cotter Pin 5 x 50
15 86171 3/8" x 1 1/4" Hex Bolt
16 967217 1" Slotted Hex Nut
17 904028 Washer - Blade Hub 1"
18 81593 3/8" Lockwasher
19 914016 1/8" Sq Head Pipe Plug
20 905429 1/2" Vent Plug
21 914008 Retaining Ring Eaton 916R
22 914003 Retaining Ring
23 966545 Snap Ring
24 904023 Blade Hub

20

Series 1 Rotary Cutter

SHIPPING KIT AND BUNDLE NUMBERS

The following is a list of Kit Numbers for this product and the Bundle Numbers,
Descriptions, and Quantities for each Kit.

QUANTITY BUNDLE NO. DESCRIPTION

Y410LS - MODEL #410 SERIES 1 ROTARY CUTTER (THREE POINT)

1 F0869 Deck Assembly

Y510LS - MODEL #510 SERIES 1 ROTARY CUTTER (THREE-POINT)

1 F0870 Deck Assembly

OPTIONAL BUNDLE NUMBERS

The following is a list of options available for the Kits listed above.

Y424LS CHAIN KIT FOR Y410LS CUTTERS

1 F0878 Carton
1 F0877 Plates & Rods

Y524LS CHAIN KIT FOR Y510LS CUTTERS

1 F0876 Carton
1 F0875 Plates & Rods

21

NOTES

NOTES

Farm King Division
301 Mountain Street S.
Morden, MB R6M 1X7
Ph.: [phone]
Fax: [phone]

Allied/Inland Division
1260 Clarence Avenue
Winnipeg, MB R3T 1T2
Ph.: [phone]
Fax: [phone]

B.I.I. Division
1330 43

rd

Street N.W.
Fargo, ND 58102
Ph: [phone]
Fax: [phone]

B.C., Abbotsford
[phone]

AB, Edmonton
[phone]

SK, Regina
[phone]

ON, Woodstock
[phone]

QC, Dorion
[phone]

AR, West Memphis
[phone]

GA, Stone Mountain
[phone]

ID, Meridian
[phone]

IN, Clarksville
[phone]

KS, Wichita
[phone]

MN, Lakeville
[phone]

MT, Billings
[phone]

ND, Bismarck
[phone]

Burando Hill
Katanning
W. Australia
011-618-98-214422

011-52-158-90306

Chihuahua, Mexico

ND, Fargo
[phone]

NE, Blair
[phone]

OH, Youngstown
[phone]

OR, Beaverton
[phone]

SD, Huron
[phone]

TX, Houston
[phone]

UT, Salt Lake City
[phone]

WI, Portage
[phone]

John Kerr Equipment Ltd.
Wilcoxholm Farm
Linlithgow, W. Lothian
Scotland
011-441-506-842280

Skovde, Sweden
011-46-500-452651

Naestved, Denmark
011-45-557-29511

Buhler Manufacturing

301 Mountain Street S.
Morden MB.
R6M 1X7
Ph.: [phone]
Fax: [phone]

www.buhler.com

Printed in Canada