Farm King I Series Product manual

Rotary Cutter
Series I
OPERATOR AND PARTS MANUAL
092013 FK372

3
Table of Contents - Series I Rotary Cutter
Table of Contents
Introduction .................................................................................................................................5
Safety............................................................................................................................................6
• Safety Instruction.............................................................................................................6
• General Safety..................................................................................................................7
• Start-up Safety .................................................................................................................7
• Operation Safety ..............................................................................................................7
• Transport Safety...............................................................................................................7
• Service and Maintenance Safety ....................................................................................8
• Storage Safety..................................................................................................................8
• Safety Signs .....................................................................................................................8
• Safety Sign Installation ...................................................................................................8
Assembly....................................................................................................................................10
• Chain Kit Assembly Instructions................................................................................... 11
Operation ...................................................................................................................................11
• Theory of Operation ......................................................................................................12
Maintenance ..............................................................................................................................13
• Service ............................................................................................................................13
Bolt Torque .................................................................................................................................14
• Checking BoltTorque .....................................................................................................14
Part Drawings.............................................................................................................................16
• 4' and 5' Drawing...........................................................................................................16
• 4' and 5' Parts List..........................................................................................................17
• Chain Kit Drawing..........................................................................................................20
• Chain Kit Parts List .........................................................................................................21
• PTO Shaft Drawing ........................................................................................................22
• PTO Shaft Parts List .......................................................................................................23
• Gearbox Drawing - 410..................................................................................................24
• Gearbox Parts List - 410.................................................................................................25
• Gearbox Drawing - 510..................................................................................................26
• Gearbox Parts List - 510.................................................................................................27

4
Table of Contents - Series I Rotary Cutter
Shipping Kit and Bundle Numbers ..........................................................................................28
Warranty.....................................................................................................................................30
Manufacturer’s statement: for technical reasons Buhler Industries Inc. reserves the right to modify
machinery design and specifications provided herein without any preliminary notice.
Information provided herein is of descriptive nature. Performance quality may depend on soil fertility,
applied agricultural techniques, weather conditions and other factors.

5
Introduction - Series I Rotary Cutter
Introduction
The Farm King Series 1 Rotary cutter available in 48" and 60" and is equipped with a 3-point hitch.
The 3-point hitch is Farm King Quick Hitch compatible so it is easy to attach and unhook. 3-point
hitch models include a single solid rubber training wheel.
Farm King Rotary Cutters are built tough and made to last.The blades are heat-treated 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 Farm King
Dealer if you need assistance, information, or additional copies of the manual. Visit our website
at www.buhlerindustries.com for a complete list of dealers in your area.
The directions left, right, front and rear, as mentioned throughout this manual, are as seen facing
in the direction of travel of the implement.

6
Safety - Series I Rotary Cutter
Safety
Safety Instructions
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.
The safety alert symbol means…
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.
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.

7
Safety - Series I 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 Farm King product as this could
affect function or safety, and could affect the life of the equipment.
• Never start or operate the mower except from the operator’s station on the power unit.
• Inspect and clean the working area before operating.
• Keep hands, feet, clothing, and hair away from moving parts.
• 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 PTO rpm speed.
• Never operate the equipment in the raised position.
Transport Safety
• ReviewTransport Safety instructions in tractor manual before moving.
• Check with local authorities regarding transport on public roads. Obey all applicable laws
and regulations.
• Do not tow equipment that does not have brakes at speeds over 20 mph (32 km/h).
• Do not two equipment that does not have brakes that, when fully loaded, has a mass
(weight) over 3300 lb. (1.5 t) and more than 1.5 times the mass (weight) of the towing unit.
• 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.

8
Safety - Series I Rotary Cutter
• Never have the equipment in operation during transport.
• Always travel at a safe speed.
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.
• Replace and secure all shields removed during servicing 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.
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.
• Replace safety sign immediately should it become damaged, torn or illegible. Obtain
replacements from your authorized dealer using the part numbers shown.

9
Safety - Series I Rotary Cutter
1
1
1
2
3
1
3
2
1
2
3

10
Assembly Instructions
1. Raise the hitch arms (#1) and the hitch supports (#4) from the deck. Remove the bolt holding on
the top link (#12). 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 (#19) 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 (#8) to the front of the cutter using 3/8" x 1" (10 x 25 mm) hex bolts,
lock washers, flat washers and hex nuts.
2. Use 1/4" (6 mm) x 5 link chains (#2) at the front. A chain is pushed through each slot from
underneath and a 3/8" (10 mm) 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 (#5) and rear side (#6 & #7) chain holders to the rear of the cutter. Use
1/4" (6 mm) x 5 link chains (#2) along all rear edges.Thread rods as in front using lengths as
shown in parts list.
Assembly - Series I Rotary Cutter

11
Operation - Series I Rotary Cutter
Operation Instructions
1. Connecting toTractor: All cutters are supplied with a standard 1-3/8" (35 mm) 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. 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 not be used without it. Insert a 1⁄2" x 3-1⁄2" (13 x 89 mm) Grade 2 bolt with a lock nut to
act as shear pin and replace all shields.
3. OperatingTractor 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.
4. 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 to harvest.

12
Operation - Series I Rotary Cutter
Theory of Operation

13
Maintenance - Series I Rotary Cutter
Maintenance
Service
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.
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. Shielding: Always keep all shielding in place and repair or replace if damaged.
4. 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. NOTE: Use Farm
King 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 blade pin clips.The
clips are then pulled out and the blade should fall down. 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 blade pin clips and close the access door.

14
BoltTorque
Checking Bolt Torque
The tables shown below give correct torque values for various bolts and hex bolts.Tighten all bolts
to the torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using
bolt torque chart as a guide. Replace hardware with the same strength bolt.
Bolt Torque*
Bolt Diameter Grade 2 Bolts Grade 5 Bolts Grade 8 Bolts
(inches) SAE 2 SAE 5 SAE 8
“A” (lb-ft) (N.m) (lb-ft) (N.m) (lb-ft) (N.m)
0.25 (1/4) 6 8 9 12 12 17
0.313 (5/16) 10 13 19 25 27 36
0.375 (3/8) 20 27 33 45 45 63
0.438 (7/16) 30 42 53 72 75 100
0.5 (1/2) 45 61 80 110 115 155
0.563 (9/16) 70 95 115 155 165 220
0.625 (5/8) 95 128 160 215 220 305
.75 (3/4) 165 225 290 390 400 540
0.875 (7/8) 170 230 420 570 650 880
1 225 345 630 850 970 1320
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless otherwise
specified.Therefore, do not grease or oil bolts or hex bolts unless otherwise specified in this manual. When
using locking elements, increase torque values by 5%.
*Torque value for bolts and hex bolts are identified by their head markings.
BoltTorque - Series I Rotary Cutter

16
Parts - Series I Rotary Cutter
4' and 5' Drawing
13
1
4 2
33
5
40
2
42
2
3 2
2 3
10
1
2 3
40
2
33
5
11
1
12
1
1 2
29
2
26
2
27
2
25
4
30
2
25
4
28
2
24
1
7 1
58
1
5 16
2
39
2
38
2
33
5
9 5
21
1
54
1
55
1
53
1
49
1
34
4
37
4
52
1
33
5
41
2
36
4
32
4
9 5
8 1
31
1
43
1
59
1
45
1
44
1
57
1
57
1
56
1

17
Parts - Series I 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.
Item Part Number Description Qty
1 116783 Mast/Hitch, 3" x 26.34", 5' Rc 2
2 965911 Linch Pin 7/16 3
3 906416 Hitch Bushing 1.25 OD x 1.00 ID x 0.44 Lg 2
4 116831 Mast/Hitch Support, 4'Rc 2
816509 Mast/Hitch Support, 5' 2
5 816036 Access Door - Series I 1
6 84217 Wing Nut 0.375 2
7 25312 Deck Weldment, 4' Rotary Cutter 1
25311 Deck Weldment, 5' 1
8 9812034 Bolt Hex 0.500 Nc x 3.50 Gr 2 (Pl) 1
9 84270 Bolt Hex 0.625 x 1.75 Gr 5 (Pl) 5
10 965807 Top Link Pin (Cat.1), 5'Rc 1
11 116777 Spacer, Hitch 1
12 116784 Link, 4'Rc / 5'Rc 1
13 814426 Shaft Complete, PTO, 4'Rc 1
14 966001 Danger 3 Points 2
15 966002 Warning Components 2
16 966003 WarningTo Avoid 1
17 967388 Check Oil 1
18 108431 Warning Check Pto Shaft 1
19 816877 Shield, PTO 1
20 814425 Speed Up Gearbox Rc30-250045 - 4' 1
966108 Gearbox Assembly (Shear Pin) - 5' 1
21 816505 Tail Wheel Brkt Weldt, 4' & 5' Rc 1
22 814432 Rear Wheel Assy 1
23 116786 Spacer 1.26 ID,Tailwheel 4'Rc/5'Rc 1
24 116901 Blade Bar Weldment 1
25 814527 Washer Flat High Strength 1.06 ID x 2.50 OD (Pl) 4
26 81249 Cotter Pin 0.188 x 2.50 Pol 2
27 814526 Nut Slotted Hex 1.00 - 8 Unc 2
28 116834 Bolt Hex 1.00Nc x 3.00 Gr 8 Assy (Pl) 2
29 814511 Blade 18" - 4' 2
966519 Blade 24" - 5' 2
30 116829 Spacer 1.032 ID x 1.25 OD x 1.28 Lg 2
31 812364 Nut Lock (Steel) 0.500 Nc Grb (Pl) 1
32 81677 Washer Lock 0.625 (Pl) 4
33 812482 Nut Lock (Steel) 0.625 Nc Grb (Pl) 5

18
Parts - Series I Rotary Cutter
Item Part Number Description Qty
34 81549 Bolt Hex 0.313 Nc x 0.75 Gr5 (Pl) 4
35 115793 Decal Ref. Plate B.I.I. Serial# 1
36 81676 5/8" Hex Nut (Pl) 4
37 81569 5/16" Lock Washer (Pl) 4
38 81570 Washer 0.375 Flat St Hs (Pl) 2
39 81593 Lock Washer 0.375 2
40 81672 Bolt Hex 5/8 x 4.50 Unc 2
41 981664 Hex Bolt 5/8 x 2.25 2
42 965809 Lift Arm Pin Cat 1 w/ Nut & Washer 2
43 84583 Grease Fitting 1/8 Npt Str Screw 1
44 909785 5 x 45 Cotter Pin - 4' 1
966562 Cotter Pin 5 Mm x 50 Mm - 5' 1
45 909786 1" Slotted Hex Nut - 4' 1
967217 1" Slotted Hex Nut - 5' 1
46 815061 410 Rotary Cutter Decal 2
47 815065 Farm King Rotary Cutter Decal 2
48 909767 WheelYoke 1
49 909768 M24 x 2 x 186 Spindle Bolt 1
50 909769 M24 x 2 Spindle Nut 1
51 909770 Spindle Cotter Pin 1
52 909771 15" Wheel w/ Rim 1
53 909772 4 Bolt Hub w/ Bushing 1
54 909773 M12 x 1.75 x 25 Hex Bolt 4
55 909774 Lug Bolt Flat Washer 4
56 116786 Spacer 1-1/4" ID x 1/2" 1
57 81210 1/4" x 2" Cotter Pin 1
58 816681 1-1/4" x 4 mmTail Wheel Washer 1
59 811747 Klik Pin 0.31 x 1.69 1

20
Parts - Series I Rotary Cutter
Chain Kit Drawing