BROWN 684 Owner'S/Operator'S Manual Download Page 2

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Copyright Infomation

are property of Brown Manufacting Corporation. “Texaco” and “Mobil” are trademarks of their

respective companies. This publication may be freely reproduced, either in whole or in part,

provided that the content herein is not altered. We encourage you to make copies of this manual and

to distribute it to every operator of the machine. Additional copies are also available from Brown

Manufacturing Corporation or on our website at www.brownmfgcorp.com.

Cover

Illustrated: Model 684 brush cutter.

Disclaimer

Due to engineering improvements and revision of product specifications, the information contained

in this manual is subject to change without notice.

Summary of Contents for 684

Page 1: ...not attempt to operate the unit until you fully understand the material covered in this manual Without the knowledge contained in this manual injury or death can result WARNING www brownmfgcorp com For use with beginning Serial Number S705B 1000 ALL WARRANTY WORK MUST BE APPROVED BY BROWN MFG CORP BEFORE WORK BEGINS ...

Page 2: ...e or in part provided that the content herein is not altered We encourage you to make copies of this manual and to distribute it to every operator of the machine Additional copies are also available from Brown Manufacturing Corporation or on our website at www brownmfgcorp com Cover Illustrated Model 684 brush cutter Disclaimer Due to engineering improvements and revision of product specifications...

Page 3: ...tents Warranty Statement 4 Owner Registration 5 Equipment Safety 7 Assembly 16 Operation 18 Maintenance 22 Troubleshooting 28 Specifications 29 Clutch Adjustment 30 Replacement Parts 31 Maintenance Log 38 ...

Page 4: ... OR IMPLIED WITH RESPECTTOANYOFBROWN S PRODUCTS INCLUDED BUTNOTLIMITEDTOANYMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL BROWN BE RESPONSIBLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE SUFFERED BY PURCHASER OR ANY OTHER PERSON OR ENTITY CAUSED IN WHOLE OR IN PART BY ANY OF BROWN S PRODUCTS Any person or entity to whom this warranty extends and who claims brea...

Page 5: ... and will not be responsible for any returned goods Drive shaft slip clutch warranties Many factors can cause a slip clutch to fail Most failures are not caused by the quality of workmanship or of materials used in the component Therefore all warranty claims on drive shafts slip clutches are sent to the manufacturer of the component All warranties approved by the component manufacturer will be han...

Page 6: ...ner with the proper safety and operation information Two 2 copies are provided with each unit One copy is for the owner to have at office for review when not operating the equipment Second copy is to stay with the unit at all times This will provide the operator the information needed for safe and proper operation of the unit If the Owner s Manual becomes lost or damaged contact Brown Mfg or local...

Page 7: ...machine stop and read this owners manual Do not attempt to operate the unit until you fully understand the material covered in this manual Without the knowledge contained in this manual injury or death can result Each operatorof the equipment should review this manual every six 6 months You are encouraged to duplicate this manual and to distribute it to each operator of the equipment for their tra...

Page 8: ...anent part of your equipment Should ownership of the equipment be transferred this manual must also be transferred Unauthorized modifications to the equipment are not recommended This could impair the function safety and life of the machine For any part of this manual that you do not understand contact your dealer or Brown Manufacturing Corporation at 800 633 8909 All implements with moving parts ...

Page 9: ...tes les consignes du manuel de propriétarie avant d utiliser la unité Read and understand owner smanualbefore operating unit Part No SD 001A THROWN OBJECT HAZARD To prevent serious injury or death from thrown objects Stay clear when blade is turning Operate only with all guards installed and in good condition Stop operation if bystanders come within several hundred feet DANGER SD 007A Standard mod...

Page 10: ...n freely on driveline Part No SD 006A WARNING To prevent serious injury or death Read and understand Operator s Manual before using Do not permit riders on the tractor or cutter Never carry child on the tractor seat Operate with guards installed and in good condition Operate only with tractor equipped with ROPS and seatbelts Keep away from moving parts Stop engine set brake and wait for all moving...

Page 11: ...B SD 002 Safety Decal Tighten blade bolts C SD SW2 Safety Decal When servicing use proper tools and equipment D SD 010 Safety Decal Read and understand owners manual F SD 001A Safety Decal Thrown object hazard 2 req G SD 005A Safety Decal Rotating blades 4 req H SD 006A Safety Decal Rotating driveline 3 req J SD 007A SD 008A Safety Decal Operate only at 540 RPM Safety Decal Operate only at 1000 RP...

Page 12: ...t Clear work area of foreign objects such as wire glass and other debris Debris thrown by the cutter can cause serious injury or death Warning Parking and dismounting The rotating parts of this cutter continue to rotate even after the PTO has been disengaged The operator should remain seated until rotation has stopped He should then set the brake turn off the engine and remove the key See tractor ...

Page 13: ...r repair any safety device bolts etc if damaged or worn Danger Stay clear of rotating blades The cutter is designed to cut grass and brush up to four inches in diameter Keep hands and feet from under cutter deck WARNING Check equipment before operation Tighten all nuts and bolts WARNING Prepare for emergencies Keep fire extin guisher and first aid kit available Fire DANGER Maintain safety dis tanc...

Page 14: ...th a certified roll over protective structure ROPS WARNING Slow travel speed when operating on slopes or rough terrain WARNING Use only with tractors equipped with a certified roll over protective structure DANGER Danger Tighten blade bolts Blade bolts will stretch with use and must be tightened Follow maintenance instructions in this manual see page 21 If the cutter is operated with loose blade b...

Page 15: ... operation Driveline must turn freely inside shields Driveline shields must be chained to prevent rotation Stay clear of rotating drivelines Keep driveline shields in place DANGER Warning Hazardous service conditions While working under the cutter deck be aware of safety hazards Follow safety precautions specified in this manual see page 20 Failure to exercise caution may lead to serious injury or...

Page 16: ... shipping position to its operational position almost perpendicular to the cutter deck Install A frame braces to the mounting brackets at the top of the A frame with the provided bolts and tighten securely 3 Bolt the rear end of the A frame braces to the mounting brackets near the rear of the machine deck and tighten securely 4 Tighten all bolts securely ...

Page 17: ... gearbox Align the groove on the input shaft with the bolt holes in the hub Reinstall the lock bolts and tighten securely Retorque lock bolts every hour for the first eight hours of use Failure to do so will result in decreased life of the clutch hub and gearbox shaft splines 8 Slide aluminum bell shield and bell shield clamp over drive shaft and attach bell shield to mounting plate with the clamp...

Page 18: ...d position when on level ground Attach the driveline to the tractor When attaching driveline to PTO shaft be certain that the quick disconnect pin is properly seated Warning A loose driveline could disconnect and cause personal injury or property damage Adjust cutting height Warning Be certain that tractor engine is stopped key is removed and all rotation of the cutter has ceased before making adj...

Page 19: ...Regardless of chosen ground speed always operate the PTO at the recommended RPM when cutting General Operation Warning The cutter creates a very serious discharge hazard Maintain a safe distance from nearby persons and property Do not operate when bystanders are present Warning Avoid personal injury Remove all rocks and other debris from work area before cutting Observe the following guidelines wh...

Page 20: ... checked twice daily during operation Every hour for the first 8 hours of use a Brown s blade bolts are designed for the extreme conditions and should not be substituted for any reason b 6 Brown blade bolts are RIGHT hand thread c Bolts and lock nuts are matched as pairs or sets do not mix d See maintenance section page 23 for proper torque specifications e When replacing or repairing blades blue ...

Page 21: ...e power of tractor e Timely replacement of worn clutch discs f Proper reassembly of slip clutch WARNING NEVER ALLOW BLADES TO COME INTO CONTACT WITH ROCKS OR STUMPS The blades will be forced to glance over the top of the obstruction causing a tremendous amount of upwards pressure on the blades blade bar and output shaft This pressure can and will cause fatigue cracking and possible breakage of the...

Page 22: ...insure that the blade may pivot freely on the blade bolt Warning Failure to maintain freely pivoting blades will cause severe vibration or blade breakage which can result in injury or death 3 Tighten blade bolts and blade bar nut Warning Failure to tighten blade bolts and blade bar nut can cause blade bolts blades or output shafts to break which can result in injury or death 4 Check for debris dep...

Page 23: ...n the end to develop 1600 ft lbs If the bolt turns you will have to hold the head of the bolt with a wrench having a 4 opening Our bolt wrench part number TC 165B Wrench 6 Tightening Blade Bar Remove blade bar cotter pin and tighten nut with a 2 9 16 socket Torque nut to 2200 ft lbs continue to torque until cotter pin hole aligns with nut Install a new cotter pin Never loosen nut to align cotter p...

Page 24: ...t will pull up into the indention when the bolt is tightened causing the blade to jam so that it can no longer pivot on the blade bolt A jammed blade will break either from fatigue or from catastrophic occurrence and will allow the blade to be ejected A blade carrier damaged in this manner must be taken out of service immediately Repair the blade carrier contact Brown Mfg Corp for instructions and...

Page 25: ...e cutting action takes place NOTE Failure to keep the blades sharp will cause multiple problems including 1 Slip clutch failure 2 Extreme blade bolt wear 3 Blade bar fatigue cracking and total failure 4 Blade fatigue cracking and total failure 5 Deck fatigue and cracking 6 Increased amount of discharge or debris 7 Poor cut increased amount of uncut material Food for Thought If your blade was an ax...

Page 26: ... or deck attitude will increase the torque load to the clutch See proper deck adjustment in this manual The front of the cutter deck should be adjusted 1 inch lower than the rear of the deck this allows the material to be cut on the front side of the blade arc If the deck were adjusted with the front higher than the rear all the material will be cut twice NEVER lower cutter deck down onto material...

Page 27: ...l levels have been checked for operational status 7 NEVER Allow blades to make contact with rocks or stumps unit was not designed for this type of operation 8 NEVER Allow an untrained operator to operate this equipment 9 NEVER Install any parts that are not genuine Brown replacement parts 10 NEVER Leave tractor seat until blades have stopped turning and all tractor shut down procedures have been c...

Page 28: ...g or gears set improperly 1 Fill to full level 2 Replace with correct lubricant 3 Remove debris 4 Consult dealer Noisy gearbox 1 Rough gears 2 Worn bearing 1 Run for a short break in period or replace gears 2 Replace bearing Leaking gearbox 1 Damaged oil seal 2 Bent shaft 3 Oil seal installed incorrectly 4 Oil level too high 5 Shaft rough or pitted in oil seal area 6 Shaft bore worn in casting 7 D...

Page 29: ...h 93 7 9 Cutting Height 2 to 12 Deck Construction 1 4 steel plate A frame Construction 3 x 3 x 1 4 tubing with Flex Link Category II hitch Weight 2240 lbs Blades Qty 2 5 8 x 6 Ultra KOR alloy Blade Bar 1 solid steel plate 38 1 2 diameter Drive Shaft Heavy duty fully shielded Tail Wheel Qty 2 5 00 x 8 laminated solid tires Gearbox 145 HP Slip Clutch Heavy duty 85 120 HP 4 disc slip clutch Horsepowe...

Page 30: ...ue setting is needed then tighten each bolt a 1 6 of a turn One revolution of the nut will compress the spring 1 75 mm Do not set the gap smaller than 5 0 mm Measurements are approximate since variations in spring force and friction materials may cause some differences in torque values The clutch can be adjusted with two 19 mm wrenches Clutch Adjustment ...

Page 31: ...1 HCS Grade 5 Zinc 5 232 6000 1 Complete tail wheel hub assembly 6 684 01 2 Tailwheel arm 7 TC 119X 2 Tailwheel fork holder 8 6 010 2 Complete tailwheel assembly 9 TC 012 2 Roll pin 1 2 x 2 10 TC 011 2 Collar 11 6 004A 2 Fork w Roll Pin and Collar 12 TC 106 2 Axle 13 TC 114 2 Axle nut 14 TC 115 2 Cotter Pin for Axle Nut 15 TC 113XA 2 Tire and wheel assembly Replacement Parts Tailwheel Assembly 2 R...

Page 32: ...Replacement Parts 32 Deck Assembly 2A 2B 18 19 20 7a Blade Bolt Access ...

Page 33: ...pin 7a TC 165B Wrench 1 Bolt Head Wrench 7 TC Wrench 1 Socket Wrench 8 TC2 014 2 A frame brace 9 M684 003 1 Deck weldment call factory 10 T5 000S 1 Blade carrier 11 T5 165NB 2 Blade bolt w nut 12 T5 079NB 2 Blade Large Hole 2 75 13 T 2600 001 1 Removal tool Blade Bar 14 T5 004BS 1 165 Blade bolt socket 15 T5 054AS 1 145 165 Blade bar socket 16 MH 01 1 Manual container NP TC 126A var 7 16 lynch pin...

Page 34: ...Replacement Parts 34 145 HP Gearbox ...

Page 35: ...t 11 BM 102 Input shaft 1 3 4 x 6 spline 13 T5 060 Bearing set front input shaft 15 BM 101 Seal input 16 235 0032 Bearing Set bottom output shaft 17 T5 065 Seal output 18 BM 112 Output shaft tapered 19 T5 048 Output seal guard 20 T5 054A Nut flanged castellated 21 T5 050 Bolt Hex Head M10 x 20 for Top Plate Not Shown T5 074T 25 Oil plug 22 T5 052 Cotter pin 5 16 x 3 Not Shown T5 LUBE 85 140 gearbo...

Page 36: ...ard Yoke Inner Profile 3a T5 W7 Inboard Yoke Outer Profile 4 236 0614 Inner Profile Tube 5 236 0615 Outer Profile Tube 6 236 0612 Spring Pin 10 x 90 7 T5 W2 Quick Disconnect Kit 1 3 8 8 236 0601 Friction Clutch 1 3 4 x 6 spline NP 236 0600 Drive Shaft Complete 1 3 8 6 x 1 3 4 6 spline Driveline Safety Shield Part No Description 236 0610 672 684 Complete shield assembly ...

Page 37: ...p Cone in 11 see page 39 for installation instuctions 4 236 0642 Belleville Spring 5 236 1703 Friction Disc 6 236 1805 Drive Plate 7 236 0644 Hex Nut M8 8 236 0646 Drive Plate 9 236 0648 Thrust Plate 10 236 0650 Backup Plate 11 236 0652 Hub 1 3 4 x 6 Spline 12 236 0654 Flange Yoke Assembly 236 0601 Friction Clutch 1 3 4 x 6 Spline Metric For Clutch Adjustment see Page 30 ...

Page 38: ... 5th Hour 6th Hour 7th Hour 8th Hour Maintenance Repair Log Please record all maintenance and repair services performed on the cutter This log may help identify recurring problems with your cutter and may be requested by the manufacturer when making warranty claims Additional log pages may be copied or ordered from Brown Mfg Corp Maintenance Log 38 ...

Page 39: ...ction Check tight and safe fit of yoke or clutch A 17 mm socket will be needed to tighten the clamping cone 3 After the first 8 10 hours of operation after installation the clamping cone must be rechecked for tight and safe fit The safe fit then needs to be checked at regular intervals during operation Re tighten clamping cone as necessary 4 To disassemble loosen clamping cone and remove it from t...

Page 40: ...Version 2 4 3 August 2018 Brown 684 www brownmfgcorp com For use with Beginning Serial Number S705B 1000 ...

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