Buhler 25, 40, 48, 60 User Manual
25 Series Rotary Tiller
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
Assembly Instructions ....................................... 7
START UP................................................................... 7
Machine Break-In .............................................. 7
OPERATION ............................................................... 8
Pre-Operation Checklist .................................... 8
Machine Components ....................................... 9
Equipment Matching ......................................... 10
Driveline Dimension .......................................... 11
Attaching/Unhooking ......................................... 13
Field Operation.................................................. 14
Transporting...................................................... 17
Storage ............................................................. 18
Theory of Operation .......................................... 19
MAINTENANCE ..........................................................20
Service .............................................................. 20
Fluids and Lubricants ........................................ 20
Greasing ........................................................... 20
Servicing Intervals............................................. 21
A-Frame Adjustment ......................................... 23
Tine Replacement ............................................. 23
Shear Bolt ......................................................... 24
Slip Clutch......................................................... 26
Troubleshooting ................................................ 27
Bolt Torque
25 Series Rotary Tiller
PARTS LISTS
Tiller Drawings and Parts List............................ 28
PTO (Shear Pin) Drawing & Parts List .............. 33
PTO (Slip Clutch) Drawing & Parts List............. 35
Gearbox Drawing & Parts List........................... 37
SHIPPING KIT AND BUNDLE NUMBERS ................. 38
25 Series Rotary Tiller
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
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25 Series Rotary Tiller
INTRODUCTION
Buhler Farm King has a collection of rotary tiller models to suit your garden and
landscaping needs. The 25 Series Tiller attaches to the 3-point hitch as well as our Cat.
1 Quick Hitch and is designed to fit a variety of tractors from 12 hp to 25 hp. Tilling
widths range from 36” to 54” in the 25 Series.
The tilling shaft is equipped with four to six flanges, depending on the model. Flanges
on all series are available with four tines. This provides an optimum balance between
performance and durability, even in heavy soils and when breaking untilled soil.
Standard on all Buhler Farm King Rotary Tillers, the skid shoes are adjustable so it is
easy to set the perfect tilling depth. The automatic chain tightener is standard on all
models. This ensures the chain remains tight even under the toughest tilling conditions.
Housing within a sealed oil bath, the chain tightener is designed to be reliable and
maintenance-free. Getting close to the fences, hedges or covering a tire track is easy
with the side shift feature. The entire unit can be pushed to one side, while the PTO
shaft remains in line with the tractor to minimize stress on the universal joint. The side
shift feature is available on all 25 Series Buhler Farm King Rotary Tillers.
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.
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25 Series Rotary Tiller
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.
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.
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25 Series Rotary Tiller
GENERAL SAFETY
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 includes but is not limited to:
- a 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.
Never start or operate the tiller 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.
OPERATING SAFETY
Do not allow riders.
Do not wear loose fitting clothing during operation.
Never operate over 540 rpm PTO speed.
Never operate the equipment in the raised operation.
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.
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25 Series Rotary Tiller
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 servicing before operating.
Use heavy leather gloves to handle sharp objects.
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 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 OF SAFETY SIGNS
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.
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25 Series Rotary Tiller
SAFETY SIGN LOCATIONS – cont’d.
Safety sign “A” Safety sign “B”
Safety sign “C”
Safety Sign “C”
Replace safety signs immediately should they become damaged, torn or illegible.
Obtain replacements from your authorized dealer using the part numbers shown.
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25 Series Rotary Tiller
ASSEMBLY
The machine is shipped with the PTO shaft not installed.
To install the PTO driveline on the machine, follow this procedure:
1. Clear the area of bystanders, especially small children.
2. Clean the splines on the yoke and the input shaft.
3. Align the splines on the yoke and the shaft.
4. Attach the driveline to the tiller by removing the tapered pin and sliding the
yoke onto the gearbox shaft. Line up the pin with the groove in the
gearbox shaft and fasten with the tapered pin. The plastic gearbox PTO
guard has a removable door on top to access the pin. The A-frame brace
can be removed to improve accessibility. Replace the brace after
tightening the nut on the tapered pin.
5. Be sure the yoke is locked in position. Pull on the yoke to be sure the pin
clicks into position.
6. Be sure that the PTO shaft is the appropriate length for the tractor/Tiller
combination. Refer to Driveline Dimension Section for details.
START UP
MACHINE BREAK-IN
Although there are no operational restrictions on the Tiller when used for the first time, it
is recommended that the following mechanical items be checked:
A. After operating for 1/2 hour or after completing 1/2 acre:
1. Check all nuts, bolts and other fasteners. Tighten to their specified torque
level.
2. Check that the blades are in good condition and bolted securely to the
rotor.
3. Check the oil level in the gearbox. Add as required.
4. Check that the PTO driveline shield turns freely.
5. Lubricate all grease points.
B. After operating for 5 hours and 10 hours:
1. Repeat items 1 through 5 of Section A.
2. Then go to the regular service schedule as defined in Section 5.
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25 Series Rotary Tiller
PRE-OPERATION CHECKLIST
Efficient and safe operation of the Rotary Tiller requires that each operator reads and
understands the operating procedures and all related safety precautions outlined in this
section. A pre-operation checklist is provided for the operator. It is important for both
personal safety and maintaining the good mechanical condition of the Tiller that this
checklist is followed.
Before operating the machine and each time thereafter, the following areas should be
checked off:
Lubricate the machine per the schedule outlined in the Service and Maintenance
Section.
Use only a tractor of adequate power and weight to pull the machine.
Check that the machine is properly attached to the tractor. Be sure retainers are
used on the mounting pins.
Check the oil level in the gearbox. Add as required.
Check that the PTO driveline shield turns freely and that the driveline can
telescope easily. Clean and lubricate if required.
Check the blades. Be sure they are not damaged or broken and are bolted
securely to the rotor. Repair or replace as required.
Remove any entangled material on rotating parts.
Install and secure all guards, doors and covers before starting.
The four socket set screws on the inside of the PTO clutch assembly must be
turned out as far as they go to engage the clutch.
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25 Series Rotary Tiller
OPERATION
TO THE NEW OPERATOR OR OWNER
The Buhler Farm King 25 Series Rotary Tiller is a machine that combines the primary
and secondary tillage operation into one machine. It breaks up the soil and prepares
the seed bed in one pass. Rotational power to the rotor is provided by the tractor PTO.
Be familiar with the machine before starting.
It is the responsibility of the owner or operator to read this manual and to train all
other operators before they start working with the machine. Follow all safety
instructions exactly. Safety is everyone's business. By following recommended
procedures, a safe working environment is provided for the operator, bystanders
and the area around the work site. Untrained operators are not qualified to
operate the machine.
Many features incorporated into this machine are the result of suggestions made by
customers like you. Read this manual carefully to learn how to operate the machine
safely and how to set it to provide maximum field efficiency. By following the operating
instructions in conjunction with a good maintenance program, your Tiller will provide
many years of trouble-free service.
MACHINE COMPONENTS
The Buhler Farm King 25 Series Rotary Tiller consists of a rotating drum that is
equipped with bent blades for breaking up and leveling soil. The blades are turned
through the soil while the machine moves over the working area. A Drag Shield is used
to maintain a level seedbed. Rotational power to the drum is provided by the PTO on
the tractor. The power is transmitted through the gearbox in the center of the machine
to the chain drive down the side. The A-frame can be moved to offset the machine.
A Point A-Frame
B PTO Driveline
C Gear Box
D Chain Drive
E Rotor
F Blades
G Skid Plates
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25 Series Rotary Tiller
EQUIPMENT MATCHING
To insure the safe and reliable operation of the Tiller, it is necessary to use a tractor
with the correct specifications. Use the following list as a guide in selecting a tractor to
use on the machine.
1. Horsepower: Use Table 1 as a guide in selecting the tractor horsepower
appropriate for your width of machine. Use only small Agricultural tractors on this
machine.
Table 1 Horsepower vs. Width
Model Width Horsepower
40S 40 inches 18
(1.0m)
48S 4 feet 22
(1.3m)
60S 5 feet 25
(1.5m)
ALERT: Do not exceed the recommended horsepower levels. The use
of horsepower will void the warranty.
2. 3 Point Hitch:
The Tiller is equipped with a Category 1, 3 point hitch. Be sure the tractor 3 point
hitch is in the Category 1 configuration.
Install the lift arm blocks or shorten the stop chains to place the arms into the
non-sway configuration. Refer to the tractor manual for details.
3. Load Sensing Hydraulics:
Many newer tractors are equipped with "Load Sensing" hydraulics. It is the
responsibility of the operator to set the tractor hydraulic system to provide "float"
on the 3 point hitch.
The float feature will allow the machine to follow the ground contours during
operation.
4. PTO Shaft:
The tractor must have a 1 3/8" 6 spline 540 RPM PTO shaft to fit the driveline
shaft supplied with the machine. Do not use shaft adapters or operate at any
other speed.
It is not recommended that a tractor with variable speed PTO's be used on the
Tiller. Operating at speeds faster than 540 RPM will overload the drivetrain and
lead to early failures. Attach the safety chains supplied with the PTO shaft,
allowing sufficient slack for the Driveline during turns and operation. Check
booklet attached to the PTO for instructions.
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