Bush Hog DHP8 Operator's Manual

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Published 05/21

This Operator's Manual is an integral part of the safe operation of this machine and must

be maintained with the unit at all times. READ, UNDERSTAND, and FOLLOW the Safety

and Operation Instructions contained in this manual before operating the equipment. C01-

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BUSH HOG

2501 Griffin Ave.

Selma, AL 36703

334-874-2700

www.bushhog.com

OPERATOR'S MANUAL

PULL DISC

HARROW

MODELS DHP8, DHP10, DHP12

Part NO. 50072116

$0.00

Table of Contents

Summary of Contents for Bush Hog DHP8

Page 1 PULL DISC HARROW MODELS DHP8, DHP10, DHP12 Published 05/21 Part NO. 50072116 OPERATOR’S MANUAL This Operator's Manual is an integral part of the safe operation of this machine and must be maintained with the unit at all times. READ, UNDERSTAND, and FOLLOW the Safety and Operation Instructions contained in this manual before operating the equipment.
Page 2 To the Owner/Operator/Dealer All implements with moving parts are potentially hazardous. There is no substitute for a cautious, safe-minded operator who recognizes the potential hazards and follows reasonable safety practices. The manufacturer has designed this implement to be used with all its safety equipment properly attached to minimize the chance of accidents.
Page 3: Table Of Contents
TABLE OF CONTENTS SAFETY SECTION ....................... 1-1 General Safety Instructions and Practices ......................1-2 Operator Safety Instructions and Practices ......................1-3 Equipment Operation Safety Instructions and Practices..................1-5 Connecting or Disconnecting Implement Safety Instructions and Practices ............1-7 Maintenance and Service Safety Instructions and Practices ................1-7 Transporting Safety Instructions and Practices ....................
Page 4 Disc Gang Adjustment ............................4-10 IN-FIELD ADJUSTMENTS ..........................4-11 Hydraulic Cylinder Depth Adjustment .......................4-12 Disc Gang Angle ............................... 4-12 Disc Leveling Front to Rear ..........................4-12 Disc Blade Replacement........................... 4-12 PRE-OPERATION INSPECTION AND SERVICE ....................4-12 Tractor Pre-Operation Inspection/Service......................4-13 Implement Pre-Operation Inspection/Service ....................4-13 DRIVING THE TRACTOR AND IMPLEMENT ....................
Page 5: Safety Section
SAFETY SECTION Safety Section 1-1...
Page 6: General Safety Instructions And Practices
Safety Messages. Always use good common sense to avoid hazards. (SG-2) Si no lee ingles, pida ayuda a alguien que si lo lea para que le traduzca las medidas de seguridad. (SG-3) DHP8, DHP10, DHP12 05/21 Safety Section 1-2 © 2021 Alamo Group Inc.
Page 7: Operator Safety Instructions And Practices
Always read carefully and comply fully with the manufacturer’s instructions when handling oil, solvents, cleansers, and any other chemical agent. (SG-22) KEEP AWAY FROM ROTATING ELEMENTS to prevent entanglement and possible serious injury or death. (SG-24) DHP8, DHP10, DHP12 05/21 Safety Section 1-3 © 2021 Alamo Group Inc.
Page 8 Avoid contact with hot surfaces of the engine or muffler. Use gloves and eye protection when servicing hot components. Contact with a hot surface or fluid can cause serious injury from burns or scalding. (SG-38) DHP8, DHP10, DHP12 05/21 Safety Section 1-4 © 2021 Alamo Group Inc.
Page 9: Equipment Operation Safety Instructions And Practices
(ROPS). Always wear seat belts. Serious injury or even death could result from falling off the tractor, particularly during a turnover when the operator could be pinned under the ROPS. (SG-7) DHP8, DHP10, DHP12 05/21 Safety Section 1-5 © 2021 Alamo Group Inc.
Page 10 (SG-15) Never run the Tractor engine in a closed building or without adequate ventilation. The exhaust fumes can be hazardous to your health. (SG-23) DHP8, DHP10, DHP12 05/21 Safety Section 1-6 © 2021 Alamo Group Inc.
Page 11: Connecting Or Disconnecting Implement Safety Instructions And Practices
Do not modify or alter this Implement. Do not permit anyone to modify or alter this Implement, any of its components or any Implement function. (SG-8) Cancer and Reproductive Harm www.P65Warnings.ca.gov DHP8, DHP10, DHP12 05/21 Safety Section 1-7 © 2021 Alamo Group Inc.
Page 12 Do not use your hands or feet to clean the disc gangs. The discs are sharp and serious injures could result from inadvertent contact with the discs. Never attempt to stand on the discs, tires, or frame members of the implement. (STL-11) DHP8, DHP10, DHP12 05/21 Safety Section 1-8 © 2021 Alamo Group Inc.
Page 13: Transporting Safety Instructions And Practices
Make certain that the “Slow Moving Vehicle” (SMV) sign is installed in such a way as to be clearly visible and legible. When transporting the Equipment use the Tractor flashing warning lights and follow all local traffic regulations. (SG-6) DHP8, DHP10, DHP12 05/21 Safety Section 1-9 © 2021 Alamo Group Inc.
Page 14 When operating in traffic always use the Tractor’s flashing warning lights and reduce your speed. Be aware of traffic around you and watch out for the other guy. (SG-19) DHP8, DHP10, DHP12 05/21 Safety Section 1-10 © 2021 Alamo Group Inc.
Page 15: Concluding Safety Instructions And Practices
These parts are made and tested to Bush Hog specifications. Non-genuine "will fit" parts do not consistently meet these specifications. The use of “will fit” parts may reduce equipment performance, void warranties, and present a safety hazard. Use genuine Bush Hog parts for economy and safety.
Page 16: Decal Location
Park on Level Ground Max 10% Ground Speed Note: BUSH HOG supplies safety decals on this product to promote safe operation. Damage to the decals may occur while in shipping, use or reconditioning. BUSH HOG cares about the safety of its customers, operators, and bystanders, and will replace the safety decals on this product in the field, free of charge (Some shipping and handling charges may apply).
Page 18: Federal Laws And Regulations
Some regulations specify that no one under the age of 16 may operate power machinery. It is your responsibility to know what these regulations are in your own area or situation. (Refer to U.S. Dept. of Labor, Employment Standard Administration, Wage & Home Division, Child Labor Bulletin #102.) DHP8, DHP10, DHP12 05/21 Safety Section 1-14...
Page 20 Indicates an imminently hazardous situation that, if not avoided, MAY result in MINOR INJURY. Identifies special instructions or procedures that, if not strictly observed, could result in damage to, or destruction of the machine, attachments or the environment. DHP8, DHP10, DHP12 05/21 Introduction Section 2-2 © 2021 Alamo Group Inc.
Page 21 Optional disc scrapers are recommended and will significantly improve overall performance in conditions where soil continually tends to buildup or stick to discs. DHP8, DHP10, DHP12 05/21 Introduction Section 2-3...
Page 22: Features
Dual Wheel Transport Kit NOTE: All reference made in this manual to right, left, front, rear, top or bottom are as viewed facing the direction of forward travel with implement properly attached to tractor.Attention Owner/Operator DHP8, DHP10, DHP12 05/21 Introduction Section 2-4...
Page 23 NOTE: Warranties are honored only if completed “Owner Registration and Warranty” forms are received by Bush Hog within thirty days of delivery of the implement. 3. Record the Model and Serial Numbers on the Warranty page provided to with your Operator’s and Part’s manual package.
Page 24 2. If the unit has been subjected to misapplication, abuse, misuse, negligence, fire or other accident. 3. If parts not made or supplied by Bush Hog have been used in connection with the unit, if, in the sole judgment of Bush Hog such use affects its performance, stability or reliability.
Page 26: Dealer Set-Up Instructions
ASSEMBLY DEALER SET-UP INSTRUCTIONS The Bush Hog DHP8, DHP10 and the DHP12 pull-type discs are perfectly matched for agricultural utility tractor having 45 to 80 drawbar horsepower. They have applications in seed bed preparation, soil pulverization, and tillage on smaller farms, ranches, construction sites, race tracks, rodeo grounds, nurseries, reclamation sites, and sod farms.
Page 27: Threaded Rod Assembly
11. A 1-1/4” - 7 x 6-1/2” (29) and four 1-1/4” SAE washers (30) are secured to the pull hitch by a 1-1/4” hex nut (31) and a 1-1/4” hex jam nut (32) for attaching to the drawbar. DHP8, DHP10, DHP12 05/21 Assembly Section 3-3 ©...
Page 28: Hydraulic Cylinder Assembly
10. Remove transport lock (20) from storage bar (19) and pin to cylinder rod with wire retaining pin (21). Refer to Hitch Assembly drawing. 11. Retract cylinder until weight of Disc Harrow is supported by the transport lock. DHP8, DHP10, DHP12 05/21 Assembly Section 3-4...
Page 29: Gang Arm Assembly
7. Repeat steps 1 to 6 to install front swing arms (1) 8. Angle adjustment handle (10) can be secured to the front or rear frame pin when not is use. DHP8, DHP10, DHP12 05/21 Assembly Section 3-5...
Page 30: Disc Gang Assembly
5. Install 3/4” washers (5) and 3/4” nylocks (4) to the U-Bolts (3). Draw nuts up loosely. DO NOT TIGHTEN. 6. Repeat steps 1 to 5 to attach the front disc gangs to the front swing arms. DHP8, DHP10, DHP12 05/21 Assembly Section 3-6 ©...
Page 31: Disc Gang Positioning
Type A is used for left front and right rear. Type B is used on the right front and left rear. 1. Bolt one attachment plate to each gang hanger using the 5/8”x4-1/2” U-Bolts (1) and 5/8” nylocks (2) supplied with the harrow. DHP8, DHP10, DHP12 05/21 Assembly Section 3-7...
Page 32: Optional Center Sweep Assembly
(1) using a 1/2”x1-1/2” capscrew and 1/2” nylocks. 3. Mount the plow point (4) to the C tine (3) using two 3/8”x1-1/2” plow bolts and two 3/8” nylocks. DHP8, DHP10, DHP12 05/21 Assembly Section 3-8 © 2021 Alamo Group Inc.
Page 33: Parking Brake
SLOW MOVING VEHICLE SIGN Attach slow moving vehicle sign (2) to the back of the frame (1) with 1/2”-13x3-1/32”x5 U-Bolt (5), spring lockwashers (4) and /2” hex nuts (3). Tighten nuts to the correct torque. DHP8, DHP10, DHP12 05/21 Assembly Section 3-9...
Page 35: Operation Section
OPERATION SECTION Operation Section 4-1...
Page 36 READ, UNDERSTAND, and FOLLOW the following Safety Messages. Death or serious injury may occur unless care is taken to follow the warnings and instructions stated in the Safety Messages. Always use good common sense to avoid hazards. (SG-2) DHP8, DHP10, DHP12 05/21 Operation Section 4-2 © 2021 Alamo Group Inc.
Page 37: Standard Equipment And Specifications
Transport Tires -------------------------Two 9.5L x 15 Tires on 15” x 6” - 5 Bolt Wheels-------------------------- and Wheels AVAILABLE OPTIONS Disc Scrapers, Center Sweep Kit, Dual Wheel Transport Kit DHP8, DHP10, DHP12 05/21 Operation Section 4-3 © 2021 Alamo Group Inc.
Page 38: Operator Requirements
Serious injury or death to the operator or others could result if the operator is under the influence of drugs or alcohol. (SG-27) DHP8, DHP10, DHP12 05/21 Operation Section 4-4 © 2021 Alamo Group Inc.
Page 39: Tractor Requirements
The power required to operate an implement is determined by the tractor PTO horsepower. For most operating conditions, implement requires a tractor with at least 40 hp for DHP8, 45 hp for DHP10 and 55 hp for DHP12. Operating the implement with a tractor that does not have adequate power may damage the tractor engine.
Page 40: Getting On And Off The Tractor
(SG-11) Never allow children or other persons to ride on the Tractor or Implement. Falling off can result in serious injury or death. (SG-10) DHP8, DHP10, DHP12 05/21 Operation Section 4-6 © 2021 Alamo Group Inc.
Page 41: Dismounting The Tractor
OPS-U-0028 Never run the Tractor engine in a closed building or without adequate ventilation. The exhaust fumes can be hazardous to your health. (SG-23) DHP8, DHP10, DHP12 05/21 Operation Section 4-7 © 2021 Alamo Group Inc.
Page 42: Connecting The Implement To The Tractor
Secure hex bolt with hex nut (5) and jam nut (6). Tighten hex nut snugly to remove all play and then back one-quarter turn. Tighten jam nut tight against hex nut. DHP8, DHP10, DHP12 05/21 Operation Section 4-8 © 2021 Alamo Group Inc.
Page 43: Slow Moving Vehicle Sign
3. Support cylinder in a vertical position with base end up and repeat bleeding process on rod end cylinder fitting. 4. Pin clevis on rod end. Slowly cycle disc harrow to transport position while checking to make sure hydraulic hoses are not pinched in the process. DHP8, DHP10, DHP12 05/21 Operation Section 4-9 © 2021 Alamo Group Inc.
Page 44: Pre-Field Adjustments
5. Determine which hole to select in the angle bar when setting disc gangs to the desired angle. 6. Pull or push on lever handle (3) to move disc gangs forward or rearward until selected hole in angle bar aligns with pin (4). DHP8, DHP10, DHP12 05/21 Operation Section 4-10...
Page 45: In-Field Adjustments
Make each trial run with tractor in the same gear and at the same speed. Varying tractor speed while making adjustments will only make adjusting the disc harrow harder. DHP8, DHP10, DHP12 05/21 Operation Section 4-11...
Page 46: Hydraulic Cylinder Depth Adjustment
8.4 Disc Blade Replacement When replacing notched disc blades, assemble he disc blades in a spiral pattern. Order 3/8” thick washer(s) from your nearest Bush Hog Dealer if axle nut(s) runs out of threads before the disc blades are tight on the axle.
Page 47: Tractor Pre-Operation Inspection/Service
Before each implement use, a complete inspection and service is required to ensure the implement is in a good and safe working condition. Damaged and/or broken parts should be repaired and/or replaced immediately. To ensure the implement is ready for operation, conduct the following. OPS-T-0002 DHP8, DHP10, DHP12 05/21 Operation Section 4-13 © 2021 Alamo Group Inc.
Page 48 Inspect all bolts and screws and tighten to the recommended torque. • Inspect tire condition, wheel bearings, and lug nut torque. • Inspect all bolts and screws and tighten to the recommended torque. DHP8, DHP10, DHP12 05/21 Operation Section 4-14 © 2021 Alamo Group Inc.
Page 49 The engine coolant fluid level is full The radiator is free of debris The air filter is in good condition Operator’s Signature:___________________________________________________ DO NOT OPERATE an UNSAFE TRACTOR or IMPLEMENT DHP8, DHP10, DHP12 05/21 Operation Section 4-15 © 2021 Alamo Group Inc.
Page 50 The Disc and Gang attachment bolts are in place and tight. The Disc edges are not chipped, cracked or bent. Operator’s Signature:_____________________________________________________ DO NOT OPERATE an UNSAFE TRACTOR or IMPLEMENT DHP8, DHP10, DHP12 05/21 Operation Section 4-16 © 2021 Alamo Group Inc.
Page 51: Driving The Tractor And Implement
When operating in traffic always use the Tractor’s flashing warning lights and reduce your speed. Be aware of traffic around you and watch out for the other guy. (SG-19) DHP8, DHP10, DHP12 05/21 Operation Section 4-17 © 2021 Alamo Group Inc.
Page 52: Starting The Tractor
When operating in traffic, always use the Tractor’s flashing warning lights and reduce your speed. Be aware of traffic around you and watch out for the other guy. DHP8, DHP10, DHP12 05/21 Operation Section 4-18...
Page 53: Driving The Tractor And Implement
Disc blades spaced 9” apart are recommended for cutting un-tilled soil. Damage to the harrow can occur if it is not lifted out of the ground before making sharp turns. DHP8, DHP10, DHP12 05/21 Operation Section 4-19...
Page 54: Disconnecting The Implement From The Tractor
Thoroughly clean all debris off the implement to prevent damage from rotting grass and standing water. • Lubricate all implement grease points as detailed in the maintenance section. DHP8, DHP10, DHP12 05/21 Operation Section 4-20 © 2021 Alamo Group Inc.
Page 55: Transporting The Tractor And Implement
Make sure that a proper size safety tow chain is secured between the tractor and implement before entering a public road. OPS-U- 0019 DHP8, DHP10, DHP12 05/21 Operation Section 4-21...
Page 56 Do not exceed the legal speed limit set in your country for agricultural tractors. Always stay alert when transporting the tractor and implement on public roads. Use caution and reduce speed if other vehicles or pedestrians are in the area. OPS-T-0013 DHP8, DHP10, DHP12 05/21 Operation Section 4-22...
Page 57: Hauling The Tractor And Implement
OPS-U- 0025 DHP8, DHP10, DHP12 05/21 Operation Section 4-23 © 2021 Alamo Group Inc.
Page 58: Troubleshooting
Disc Harrow cuts a furrow Disc Blades are not moving enough Tilt Disc Harrow down at the rear by soil to the center. turning spring adjuster clockwise. DHP8, DHP10, DHP12 05/21 Operation Section 4-24 © 2021 Alamo Group Inc.
Page 59 Furrow fillers on the end of the rear disc gangs may be too large. Disc Harrow does not pull Front disc gangs run deeper than Tilt Disc Harrow down at the rear by DHP8, DHP10, DHP12 05/21 Operation Section 4-25 © 2021 Alamo Group Inc.
Page 60 Gang axles becoming loose. Keep disc gang axle nuts tight. Disc gang axles keep coming Disc components are not sliding Check fit-up of all disc components. DHP8, DHP10, DHP12 05/21 Operation Section 4-26 © 2021 Alamo Group Inc.
Page 61 Pumping grease into the bearing to Pump grease into the bearings slower, fast in cold weather will pop off especially in cold weather. Replace all bearing seals. damaged bearings. DHP8, DHP10, DHP12 05/21 Operation Section 4-27 © 2021 Alamo Group Inc.
Page 64: Lubrication
NOTE: These values apply to fasteners as received from supplier, dry or when lubricated with normal engine oil. They do not apply if special graphited or molydisulphide greases or other extreme pressure lubricants are used. This applies to both UNF fine and UNC coarse threads. DHP8, DHP10, DHP12 05/21 Maintenance Section 5-2...
Page 67 TO THE OWNER/OPERATOR/DEALER To keep your implement running efficiently and safely, read your manual thoroughly and follow these directions and the Safety Messages in this Manual. The Table of Contents clearly identifies each section where you can easily find the information you need. The OCCUPATIONAL SAFETY AND HEALTH ACT (1928.51 Subpart C) makes these minimum safety...
Page 68 DHP8/DHP10/DHP12 DISC HARROW DHP8/DHP10/DHP12-SOM-05/21 P/N 50072116 Printed U.S.A...

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