Bush Hog BH20 Series Operator's Manual

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BH20

Series

BH25, BH26, BH27

Rotary Mower

Published 01/17

Part Number 50070397

OPERATOR'S MANUAL

Revised 10/18

BUSH HOG

2501 Griffin Ave.

Selma, Al 36703

334-874-2700

www.bushhog.com

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Page 1 BH20 Series BH25, BH26, BH27 Rotary Mower Published 01/17 Part Number 50070397 OPERATOR’S MANUAL Revised 10/18 BUSH HOG ® 2501 Griffin Ave. Selma, Al 36703 334-874-2700 www.bushhog.com...
Page 2 D813_1 D813_2...
Page 3: Osha Training Requirements
Your Authorized Bush Hog Dealer may have shown this video and presented you a DVD Video when you purchased your mower. If you or any mower operator have not seen this video, Watch the Video, Read this Operator’s Manual, and Complete the Video Guidebook before operating your new mower.
Page 4 A Manual canister is provided on the implement where this manual can be properly stored. If you lose or damage this manual a free replacement manual can be obtained from an authorized Bush Hog dealer or by down loading the manual from the Bush Hog website www.bushhog.com...
Page 5 Bush Hog will provide one (1) AEM Mower Safety Practices Video Please Send Me: VHS Format – AEM/FEMA Mower Operator Safety Video DVD Format – AEM/FEMA Mower Operator Safety Video Mower Operator’s Manual AEM Mower Operator’s Safety Manual Requester Name:________________________________________Phone:...
Page 6 DEALER to CUSTOMER Pre-Delivery/ Operation Instructions Dealer should inform the Purchaser of this product of Warranty terms, provisions, and procedures that are applicable.Dealer should inform Purchaser to review the contents of the Operator’s Manual including safety equipment, safe operation, and maintenance, to review the Safety Signs on the implement (and tractor if possible), and of Purchaser’s responsibility to train his/her operators’s in safe operation procedures.
Page 7: Table Of Contents
SETUP INSTRUCTIONS - SHIELDING AND DEFLECTORS ................3-4 SETUP INSTRUCTIONS - TAILWHEEL ......................3-4 DRIVELINE ATTACHMENT - SLIP CLUTCH ....................3-5 SLIP CLUTCH ADJUSTMENT and OPERATIONAL CHECK ................3-5 BUSH HOG SLIP CLUTCHES .........................3-6 OPERATION SECTION ...................... 4-1 OPERATOR REQUIREMENTS ........................4-3 TRACTOR REQUIREMENTS ........................... 4-4 ROPS and Seat Belt ............................
Page 8 Safety Tow Chain ............................4-11 SETTING THE MOWER ..........................4-11 Setting Mower Height- Lift Type - (Standard or Quick Hitch) ................4-12 Setting Deck Pitch ............................4-14 DRIVELINE ATTACHMENT ........................... 4-14 Driveline Length Check ........................... 4-15 Constant Velocity (CV) Driveline ........................4-18 PRE-OPERATION INSPECTION AND SERVICE ..................
Page 10: General Safety Instructions And Practices
SAFETY GENERAL SAFETY INSTRUCTIONS AND PRACTICES Safety Section 1-2 © 2018 Alamo Group Inc.
Page 11: Operator Safety
DO NOT EXCEED IMPLEMENT RATED PTO SPEED • AVOID exceeding rated PTO speeds that may result in broken drivelines or blade failures. SAFETY SIGNS: • REPLACE missing, damaged or unreadable safety signs immediately. PN OS01 BH20 Series 04/13 Safety Section 1-3 © 2013 Alamo Group Inc.
Page 12: Connection Or Disconnecting Implement Safety
Increased working length exposing unshielded driveline areas and entanglement hazards. DO NOT connect the Mower to a tractor with the PTO directly connected to the Tractor transmission. PN CD02 BH20 Series 04/13 Safety Section 1-4 © 2013 Alamo Group Inc.
Page 13: Crushing Hazards
USE tongue jack to control implement tongue movement. • USE tongue JACK to lift heavy implement tongues. • AVOID overloading jack to prevent jack failure and injury. PN CH02 BH20 Series 04/13 Safety Section 1-5 © 2013 Alamo Group Inc.
Page 14: Thrown Objects Hazards
3. INSPECT AREA thoroughly before mowing to REMOVE potential THROWN OBJECT HAZARDS, 4. NEVER ALLOW BLADES to CONTACT SOLID OBJECTS like wire, rocks, post, curbs, guardrails, or ground while mowing. PN TO02 BH20 Series 04/13 Safety Section 1-6 © 2013 Alamo Group Inc.
Page 15 STOP mowing when EXCESSIVE VIBRATION occurs: 1. STOP PTO and tractor ENGINE. 2. INSPECT mower for vibration source 3. REPLACE any damage parts and bent or damaged BLADES. PN TO02-X BH20 Series 04/13 Safety Section 1-7 © 2013 Alamo Group Inc.
Page 16: Run Over Hazards
ONLY mount or dismount when tractor and moving parts are stopped. • STOP ENGINE AND PTO, engage parking brake, lower implement, allow all moving parts to stop and remove key before dismounting from tractor. PN RO01 BH20 Series 04/13 Safety Section 1-8 © 2013 Alamo Group Inc.
Page 17: Pto Entanglement Hazards
DO NOT USE PTO ADAPTER. Using a PTO adapter can cause excessive vibration, thrown objects, blade and implement failures by doubling operating speed. Increased working length exposing unshielded driveline areas. PN PE01 BH20 Series 04/13 Safety Section 1-9 © 2013 Alamo Group Inc.
Page 18: Mower Blade Contact Hazards
STOP rotating BLADES disengage PTO and wait for blade to stop rotating before raising mower deck or wings • STOP LOOK and LISTEN before approaching the mower to make sure all rotating motion has stopped. PN MB01 BH20 Series 04/13 Safety Section 1-10 © 2013 Alamo Group Inc.
Page 19: High Pressure Oil Leak Hazards
KEEP hands and body AWAY from pin holes and nozzles ejecting hydraulic fluid. • Hydraulic fluid may cause gangrene if not surgically removed immediately by a doctor familiar with this form of injury. PN HP01 BH20 Series 04/13 Safety Section 1-11 © 2013 Alamo Group Inc.
Page 20: Electrical & Fire Hazards
ADJUST SLIP CLUTCHES to avoid excessive slippage and clutch plate heating. • CLEAR any grass clippings or debris buildup around mower drivelines, slip clutches, and gearboxes. • SHUT OFF ENGINE while refueling. PN EF02 BH20 Series 04/13 Safety Section 1-12 © 2013 Alamo Group Inc.
Page 21: Transporting Hazards
USE low speeds and gradual steering on curves, hills, rough or uneven surfaces and on wet roads • TURN ON tractor FLASHING WARNING LIGHTS. • ALLOW clearance for implement swing while turning. PN TH02 BH20 Series 04/13 Safety Section 1-13 © 2013 Alamo Group Inc.
Page 22: Hazards With Maintenance Of Implement
SAFETY HAZARDS WITH MAINTENANCE OF IMPLEMENT BH20 Series 04/13 Safety Section 1-14 © 2013 Alamo Group Inc.
Page 23: Parts Information
PARTS INFORMATION PARTS INFORMATION Bush Hog mowers use balanced and matched system components for blade carriers, blades, cuttershafts, knives, knife hangers, rollers, drivetrain components, and bearings. 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”...
Page 24: Decal Location
SAFETY Decal Location 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 25 Blade Rotation, CCW D547 DANGER Driveline Hazard D549 DANGER Multi-Hazard D590 INSTRUCT Lubrication Chart D559 WARNING Use Genuine Bush Hog Parts D614 DANGER Thrown Objects D454 WARNING Crushing Hazard (located underside of deck) 50031213 REFLECTOR Red Reflector NAME BH25 50070262...
Page 33: 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.) BH20 Series 04/13 Safety Section 1-25 © 2013 Alamo Group Inc.
Page 36 INTRODUCTION We are pleased to have you as a Bush Hog customer. Your Rotary Cutter has been carefully designed with care and built with quality materials by skilled workers to give maximum service with minimum down time. This manual is provided to give you the necessary operating and maintenance instructions for keeping your rotary cutter in top operating condition.
Page 37: Equipment Specifications
Driveline Protection Slip Clutch (Standard) Slip Clutch (Standard) Slip Clutch (Standard) Guarding Front and Rear belting or Front and Rear Chains Tires Single Laminated Single Laminated Single or Dual Laminated Introduction Section 2-3 BH20 Series 04/13 2013 Alamo Group Inc.
Page 38: Key Operation Points
OEM of the Agricultural tractor used to power and transport this machine would be valid when this machine is attached to and operated by that Agricultural tractor in all OEM recommended applications. BH20 Series 04/13 Introduction Section 2-4 © 2013 Alamo Group Inc.
Page 39: Limited Warranty
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 judgement of Bush Hog such use affects its performance, stability or reliability.
Page 42: Dealer Setup Instructions
Set up mower as received from factory with these instructions. This BH20 Series is shipped partially assembled. Assembly will be easier if components are aligned and loosely assembled before tightening hardware. Refer to bolt torque chart in Maintenance Section. All fasteners are Grade 5 unless otherwise specified.
Page 43: Set Up Instructions - Quick Hitch
Pivot Arm, align holes in yoke straps and bushing and re-install remaining capscrew and locknut. 5. Tighten the fasteners enough to take out any slack but not so tight that the pivot arm can not move freely. BH20 Series 04/13 Assembly Section 3-3 © 2013 Alamo Group Inc.
Page 44: Setup Instructions - Shielding And Deflectors
SETUP INSTRUCTIONS - SHIELDING AND DEFLECTORS Bush Hog BH20 Series models as shipped from the factory, have all Shielding and Deflectors in place. Dealer should inspect to make sure that all Safety Shielding and Deflectors are in place and fasteners are tight Front and Rear Deflectors or Front and Rear Chains are a selection on BH25, BH26, BH27 Models.
Page 45: Driveline Attachment
IMPORTANT: DO NOT OVERTIGHTEN NUT AND CAUSE SPRING TO BECOME SOLID AS THIS WILL CAUSE SHAFT TO FAIL. SPRING L NGTH (See Chart) MODEL EG/Comer BH25 & BH26 1.27” (32.2 mm) BH27 1.32” (33.6 mm) BH20 Series 04/13 Assembly Section 3-5 © 2013Alamo Group Inc.
Page 48: Operation
BUSH HOG BH20 SERIES ROTARY MOWER OPERATION INSTRUCTIONS Bush Hog rotary mowers are manufactured with quality material by skilled workers. These mowers are designed to cut grass, weeds, small brush and other vegetative material up to 3” diameter in areas such as pastures, industrial areas, and roadsides.
Page 49: 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) BH20 Series 04/13 Operation Section 4-3 © 2013 Alamo Group Inc.
Page 50: Tractor Requirements
BH25 - 35HP, the BH26 - 45 HP, the BH27 - 55 HP. Operating the mower with a tractor that does not have adequate power may damage the tractor engine. Exceeding recommended HP may cause mower damage by overpowering the unit in heavy cutting conditions. BH20 Series 04/13 Operation Section 4-4 © 2013 Alamo Group Inc.
Page 51: 3-Point Hitch
Our 3-Point Quick Hitch is designed to connect to a Quick-Attach coupler making mounting dismounting your mower easier. The 3-Point Quick Hitch is also designed to connect the mower to a tractor’s 3-point linkage without the use of a Quick- Attach Coupler. DANGER BH20 Series 04/13 Operation Section 4-5...
Page 52: Tire Spacing
Never allow passengers to ride on the tractor or attached equipment. Riders can easily fall off and be seriously injured or killed from falling off and being ran over. It is the operator’s responsibility to forbid all extra riders at all times. OPS-U- 0008 BH20 Series 04/13 Operation Section 4-6 © 2013 Alamo Group Inc.
Page 53: Dismounting The Tractor
Place the tractor shift lever into a low range or parking gear to prevent the tractor from rolling. Never dismount a Tractor that is moving or while the engine is running. Operate the Tractor controls from the tractor seat only. (SG-9) BH20 Series 04/13 Operation Section 4-7 © 2013 Alamo Group Inc.
Page 54: Starting The Tractor
Always shut the Tractor completely down, place the transmission in park, and set the parking brake before you or anyone else attempts to connect or disconnect the Implement and Tractor hitches. (S3PT-15) BH20 Series 04/13 Operation Section 4-8 © 2013 Alamo Group Inc.
Page 55: Connecting The Mower-Lift Type
8. Adjust any lower link check chains, guide blocks, or sway blocks to prevent the mower from swaying side to side and possible contact with tractor rear tires. BH20 Series 04/13 Operation Section 4-9 © 2013 Alamo Group Inc.
Page 56: 3-Point Quick Hitch
Offset Adapter Hitches connect to the 3-point hitch the same way as the mower A-frame. See Offset Adapter Hitch in the Assembly Section for details to equip the mower with this feature. BH20 Series 04/13 Operation Section 4-10 © 2013 Alamo Group Inc.
Page 57: Safety Tow Chain
Never work under the Implement, the framework, or any lifted component unless the Implement is securely supported or blocked up to prevent sudden or inadvertent falling which could cause serious injury or even death. (SG-14) BH20 Series 04/13 Operation Section 4-11 © 2013 Alamo Group Inc.
Page 58: Setting Mower Height- Lift Type - (Standard Or Quick Hitch)
Align tailwheel beam between nearest sets of holes in beam support brackets and reinstall support bolts on each side of beam. Tighten all bolts and nuts. BH20 Series 04/13 Operation Section 4-12 © 2013 Alamo Group Inc.
Page 59 3-Point lift maintaining a set height or when a constant pre-adjusted cut height is required. See Check Chains in the Assembly Section for this accessory. BH20 Series 04/13 Operation Section 4-13 © 2013 Alamo Group Inc.
Page 60: Setting Deck Pitch
PTO shaft. Push and pull the driveline back and forth several times to ensure a secure attachment. OPS-R-0003_A BH20 Series 04/13 Operation Section 4-14 © 2013 Alamo Group Inc.
Page 61: Driveline Length Check
5. Raise and lower cutter to determine position with greatest distance between PTO shaft and gearbox input shaft. Shut down tractor leaving cutter in position of greatest distance. Securely block cutter in position. BH20 Series 04/13 Operation Section 4-15 © 2013 Alamo Group Inc.
Page 62 Contact authorized Bush Hog dealer. NOTE: If driveline is the correct length, omit the following steps 8 - 11 and proceed to step 12.
Page 63 Tractor PTO by pushing the PTO into the Tractor and through the support bearings or downward onto the PTO shaft, breaking it off. A broken driveline can cause personal injury. (S3PT-18) BH20 Series 04/13 Operation Section 4-17 © 2013 Alamo Group Inc.
Page 64: Constant Velocity (Cv) Driveline
Position the mower at multiple angles and perform the above procedure. Determine the sharpest turning radius that maintains a safe operating angle and note this position to the operator. OPS-R-0006 BH20 Series 04/13 Operation Section 4-18 © 2013 Alamo Group Inc.
Page 65: Pre-Operation Inspection And Service
Make sure all pins have cotter pins and washers. Serious injury may occur from not maintaining this machine in good working order. (SG-21) BH20 Series 04/13 Operation Section 4-19 © 2013 Alamo Group Inc.
Page 66: Tractor Pre-Operation Inspection/Service
Ensure the manual canister is secured to the equipment with the operator’s manual inside. • Ensure all safety signs are in place and legible. Replace missing, damaged, and illegible decals. OPS-U- 0011 BH20 Series 04/13 Operation Section 4-20 © 2013 Alamo Group Inc.
Page 67 Missing, broken, or worn items must be replaced at once to reduce the possibility of injury or death from thrown objects, entanglement, or blade contact. (SGM-3) BH20 Series 0413 Operation Section 4-21 © 2013 Alamo Group Inc.
Page 68 • Ensure the gearbox vent is in place and free from clogs. OPS-R-0040_B BH20 Series 04/13 Operation Section 4-22 © 2013 Alamo Group Inc.
Page 69: Cutting Component Inspection
• Ensure blade pan nut is tightened with the cotter pin inserted and spread. OPS-R-0041 8.3 Cutting Component Inspection Inspect blade pan and blade assembly for the following: OPS-U-0031 BH20 Series 04/13 Operation Section 4-23 © 2013 Alamo Group Inc.
Page 70 To help prevent structural damage caused by loose hardware, tighten gearbox mounting hardware as specified. Check the fastener torque after first 8 hours of use and every 50 hours thereafter. BH20 Series 0413 Operation Section 4-24 © 2013 Alamo Group Inc.
Page 71 Failure to replace abnormally worn blades may lead to catastrophic failure of the blades and ejection of the broken part with tremendous force which may cause serious bodily injury or death. OPS-U-0032 BH20 Series 04/13 Operation Section 4-25 © 2013 Alamo Group Inc.
Page 72: Blade Bolt Inspection
Failure to replace abnormally worn blade bolts may lead to catastrophic failure of the blades and ejection of the broken part which may cause serious bodily injury or death. Always replace Blade Bolts with new bolts whenever replacing the Blades. OPS-U-0037 BH20 Series 04/13 Operation Section 4-26 © 2013 Alamo Group Inc.
Page 73 Blades are not chipped, cracked or bent Blade bolts are tight Wheel lug nuts are tight Transport locks are in good condition Make____________________ Shift ____________________ Operator’s Signature: DO NOT OPERATE an UNSAFE TRACTOR or MOWER BH20 Series 04/13 Operation Section 4-27 © 2013 Alamo Group Inc.
Page 74: Driving The Tractor And Implement
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 DRIVING THE TRACTOR AND IMPLEMENT BH20 Series 04/13 Operation Section 4-28 © 2013 Alamo Group Inc.
Page 75 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) BH20 Series 04/13 Operation Section 4-29 © 2013 Alamo Group Inc.
Page 76: 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. BH20 Series 04/13 Operation Section 4-30 © 2013 Alamo Group Inc.
Page 77: Raising The Mower
Use extreme caution when operating on steep slopes. Keep the tractor in a low gear when going downhill. DO NOT coast or free-wheel downhill. OPS-R-0019 BH20 Series 04/13 Operation Section 4-31 © 2013 Alamo Group Inc.
Page 78: Crossing Ditches And Steep Inclines
When crossing such terrain, the implement should be fully lowered for a lower center of gravity and added stability. OPS-R-0021 BH20 Series 04/13 Operation Section 4-32 © 2013 Alamo Group Inc.
Page 79: Operating The Tractor And Implement
Stop mowing immediately if blades strike a foreign object. Repair all damage and make certain rotor or blade carrier is balanced before resuming mowing. (SGM-05) BH20 Series 04/13 Operation Section 4-33 © 2013 Alamo Group Inc.
Page 80: Foreign Debris Hazards
If a bystander comes within 300 feet of the tractor while the mower is being operated, stop the tractor at once, idle the engine and disengage the PTO. Do not engage the PTO again until all bystanders are well past the 300 foot distance. OPS-R-0024 BH20 Series 04/13 Operation Section 4-34 © 2013 Alamo Group Inc.
Page 81: Engaging The Power Take Off (Pto)
Do not put hands or feet under mower decks. Blade Contact can result in serious injury or even death. Stay away until all motion has stopped and the decks are securely blocked up. (SGM-09) BH20 Series 04/13 Operation Section 4-35 © 2013 Alamo Group Inc.
Page 82: Pto Rpm And Ground Speed
When mowing in reverse, operate the tractor and mower at a reduced ground speed to ensure tractor and mower control is maintained. Do not mow with two machines in the same area except with Cab tractors with the windows closed. (SGM-11) BH20 Series 04/13 Operation Section 4-36 © 2013 Alamo Group Inc.
Page 83 Sharp turns can cause premature failure of the joints and place pressure on the tractor PTO shaft and could cause extensive mechanical damage to the mower and tractor. OPS-R-0027_A BH20 Series 04/13 Operation Section 4-37 © 2013 Alamo Group Inc.
Page 84 Stay alert and watch for trees, low hanging limbs, power lines, and other overhead obstacles and solid ground objects while you are operating. Use care to avoid hitting these items OPS-R-0028_A BH20 Series 04/13 Operation Section 4-38 © 2013 Alamo Group Inc.
Page 85: Right Of Way (Highway) Mowing
Mower sections or wings are adjusted to be close and parallel to ground without exposing blades. • MOWING AREA has been inspected and foreign materials and debris have been removed. • PASSERSBY are inside enclosed vehicle. OPS-U-0040 BH20 Series 04/13 Operation Section 4-39 © 2013 Alamo Group Inc.
Page 86: Shutting Down The Implement
OPS-R-0030_A Never stand or allow another person to stand between a running Tractor and the Mower when disconnecting the Implement from the Tractor 3-point hitch. BH20 Series 04/13 Operation Section 4-40 © 2013 Alamo Group Inc.
Page 87 Do not let the driveline fall into mud or dirt, which can contaminate the bearing and shorten the life of the driveline. OPS-R-0031_N BH20 Series 04/13 Operation Section 4-41 © 2013 Alamo Group Inc.
Page 88: Mower Storage
By using good judgement and following safe transport procedures, the possibility of accidents while moving between locations can be substantially minimized. OPS-U- 0017 BH20 Series 04/13 Operation Section 4-42 © 2013 Alamo Group Inc.
Page 89: Tire And Wheels
15 MPH. Excessive speed can cause damage to the machine and tire sections. Sectional tires must be installed such that the rubber segments lay with the ground. OPS-R-0035_A BH20 Series 04/13 Operation Section 4-43 © 2013 Alamo Group Inc.
Page 90: Transporting On Public Roadways
Consult an authorized tractor dealer for lighting kits and modifications available to upgrade the lighting on older tractor models. OPS-U- 0021 BH20 Series 04/13 Operation Section 4-44 © 2013 Alamo Group Inc.
Page 91: Hauling The Tractor And Implement
If during transport a hard braking, sharp turning, or swerving action was performed, stop at the next safe location to inspect the security of the load. BH20 Series 04/13 Operation Section 4-45 © 2013 Alamo Group Inc.
Page 92: Troubleshooting Guide
Uneven rear. (Refer to the “Operation Section- Setting the mower-Setting Deck Height”) Excessive ground speed Reduce ground speed. Conditions too wet. Wait for conditions to dry. Reduce ground speed. BH20 Series 04/13 Operation Section 4-46 © 2013 Alamo Group Inc.
Page 93 PTO engaged at high engine RPM Idle engine to engage PTO Cutting in rocky conditions Increase cutting height. Blade carrier RPM too high. Check gearbox ratios. Blades not properly heat treated. Consult your Dealer. BH20 Series 04/13 Operation Section 4-47 © 2013 Alamo Group Inc.
Page 96: Hazards With Maintenance Of Implement
MAINTENANCE HAZARDS WITH MAINTENANCE OF IMPLEMENT BH20 Series 04/13 Maintenance Section 5-2 © 2013 Alamo Group Inc...
Page 97: Lubrication
MAINTENANCE PARTS INFORMATION Bush Hog mowers use balanced and matched system components for blade carriers, blades, cuttershafts, knives, knife hangers, rollers, drivetrain components, and bearings. 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”...
Page 99: Gearbox
Tail Wheel Bearings are packed at the factory with heavy-duty bearing grease. Grease Fittings are provided in the Wheel Hub and Tail Wheel Beam. Grease after 8 hours of use. Figure MntP-R-0191. BH20 Series 04/13 Maintenance Section 5-5 © 2013 Alamo Group Inc...
Page 100: Main & Jackshaft Driveline Shields
Install locking screws. FIGURE Mnt-0028. IMPORTANT! Check that Guard Missing decal steel tube under inner guard Rotating Driveline Decal firmly affixed, undamaged and readable. If not, replace. BH20 Series 04/13 Maintenance Section 5-6 © 2013 Alamo Group Inc...
Page 101: Main Cv Driveline Safety Shield
FIGURE MNT-R-0039. Tighten locking screws. FIGURE MNT-R-0039. IMPORTANT! Check that Guard Missing decal steel tube under inner guard Rotating Driveline Decal firmly affixed, undamaged and readable. If not, replace. BH20 Series 04/13 Maintenance Section 5-7 © 2013 Alamo Group Inc...
Page 102: Blade Servicing
NOTE: Replace Blades in pairs after no more than 1/2” notch wear. BH20 Series 04/13 Maintenance Section 5-8 © 2013 Alamo Group Inc...
Page 103: Blade Sharpening
Strike opposite end of bar with sledge hammer. Rotate blade carrier 180 degrees and repeat process until carrier breaks loose. BH20 Series 04/13 Maintenance Section 5-9...
Page 104: Blade Carrier Installation
When installing blades be sure and check blade bolt pivot diameter for wear. Replace bolt if worn more than 1/4 inch at any point. Tighten nut to 600 ft. lbs. BH20 Series 04/13 Maintenance Section 5-10...
Page 105: Slip Clutch Operational Check
2. With tractor at idle speed, engage tractor PTO drive for 2-3 seconds. Clutch should lip without turning blades. If clutch does not slip, contact your authorized Bush Hog dealer. 3. Retighten nuts to within 1/64” of original position. Initial spring length is shown in Figure Mnt-R-0478.
Page 106: Storage
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. BH20 Series 0413 Maintenance Section 5-12 © 2013 Alamo Group Inc...

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Bush Hog BH20 Series Operator's Manual

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