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1-1 INTRODUCTION

We  are  pleased  to  have  you  as  a  Bush  Hog  cus-
tomer.  Your 305/306 Series Rotary Cutter has been
carefully  designed  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.    Please  read  this  manual  thor-
oughly.    Understand  what  each  control  is  for  and
how  to  use  it.    Observe  all  safety  precautions
decaled  on  the  machine  and  noted  throughout  the
manual  for  safe  operation  of  implement.    If  any
assistance  or  additional  information  is  needed,  con-
tact your authorized Bush Hog dealer.

1-2 DESCRIPTION

The  305/306  Series  rotary  cutters  (Figure  1-1)  are
designed  for  medium  duty  applications  such  as
grass, corn stalks and light brush.  These cutters are
single  spindle  with  two  free-swinging  blades.    Free-
swinging blades reduce the shock of impact when a
stationary  object  is  hit.  Additional  protection  is  pro-
vided by a slip clutch on the gearbox input shaft.  A
round  blade  holder  allows  the  cutter  to  “ride  over”
stumps and similar immovable objects.  Models 305
and 306 are attached to the tractor using a standard
Cat.  I,  II,  or  III  3-point  hitches  and  can  use  Cat.  II
and III quick hitch. Standard equipment includes dri-
veline  shields,  clutch  shields  and  front  discharge
shields (deflectors). 

NOTE: Dealer  or  purchaser  may  elect  to  delete
front  and  rear  discharge  shields  (deflectors)  at  their
option.  Refer to “WARNING” in Section 3-3.

NOTE

All  references  made  to  right,  left,  front,  rear,  top  or
bottom are as viewed facing the direction of forward
travel with implement properly attached to tractor.

SECTION I

INTRODUCTION AND DESCRIPTION

Table 1 Technical Specifications

SERIES

305306

Cutting Width

60”

72”

Transport Width

65”

79”

Length

101”

113”

Hitch

3-Point Cat. I, Cat II and Cat. II

and Cat. II & III Quick Hitch

Cutting Height

2” - 12”

2” - 12”

Cutting Capacity

3” Diameter

3” Diameter

Driveshaft

ASAE Category 4 or 5

ASAE Category 4 or 5

Gearbox

540 RPM (80 HP)

540 RPM (90 HP)

Blades

1/2” x 4” Uplift

1/2” x 4” Uplift

Blade Tip Speed

12,193 fpm

14,632 fpm

Blade Holder

Round

Round

Top Deck

7 Ga. Steel

7 Ga. Steel

Side Bands

1/4” x 7”

1/4” x 7”

Minimum Tractor HP

30

40

Front & Rear Deflectors                                            Front chains are standard, rear chains are optional

Wheels

Laminated

Laminated

Approximate Weight (lbs.)

825 lbs.

1

1078 lbs. 

1

1 - Weight includes deflector chains front and standard 3-point hitch.        

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

Figure 1-1 Major Components

Support Yoke                         Tailwheel

Gearbox

Strongback

A-Frame
Strut

Skid

Chains

Driveline

Hitch Pin

6

All manuals and user guides at all-guides.com

Summary of Contents for 305 Series

Page 1: ...BUSH HOG ASSEMBLY OPERATION MAINTENANCE 4 00 Operator s Manual 305 306 SERIES ROTARY CUTTERS 403 Part No 62736 All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 2: ...sh Hog parts which are manufactured with the same precision and skill as our original equipment Our trained service personnel are well informed on methods required to service Bush Hog equipment and ar...

Page 3: ...l Customer and or Operator s responsibility to read the Operator s Manual to operate lubricate maintain and store the product in accordance with all instructions and safety procedures Failure of the o...

Page 4: ...arges for normal service or adjustment loss of crops or any other loss of income rental of substitute equipment expenses due to loss damage detention or delay in the delivery of equipment or parts res...

Page 5: ...een instructed on the safe and proper use of the cutter 10 Purchaser or dealer elects to delete deflectors front chains Explanation Dealer s Signature Purchaser s Signature THIS CHECKLIST TO REMAIN IN...

Page 6: ...uld cease mowing whenever anyone comes within the operating area 7 Clear the work area of objects which might be picked up and thrown 8 Use a piece of cardboard or wood rather than hands to search for...

Page 7: ...ions to Keep all guards in place when the machine is in operation Permit no riders on equipment Stop engine disconnect the power source and wait for all machine movement to stop before servicing adjus...

Page 8: ...t II and III quick hitch Standard equipment includes dri veline shields clutch shields and front discharge shields deflectors NOTE Dealer or purchaser may elect to delete front and rear discharge shie...

Page 9: ...Raise and lower cutter to determine position with shortest distance between the tractor PTO shaft and gearbox input shaft Shut down tractor leaving cutter in position of shortest distance Securely bl...

Page 10: ...ion of shield as a guide cut shaft the same amount Figure 2 6 Figure 2 6 K Repeat steps I and J to other driveline section L Deburr ends of driveline sections and clean away all chips and filings Figu...

Page 11: ...ways tilt the cutter approximately 2 inches 51mm lower in the front This tilt decreases horsepower require ments and increases potential ground speed When fine shredding is desired adjust cutter deck...

Page 12: ...in the torque specifications chart unless otherwise indicated THE CUTTER CAN FALL FROM HYDRAULIC SYSTEM FAILURE TO AVOID SERIOUS INJURY OR DEATH SECURELY SUPPORT CUTTER BEFORE WORKING UNDERNEATH BEFO...

Page 13: ...at until blade holder comes off Care should be taken not to damage blade bolt threads REPLACEMENT A Replace blade holder and tighten the lower shaft nut to 600 ft lbs If a torque wrench is not availab...

Page 14: ...to the plug located on the top of the gearbox Never fill the gear box above this level Seals could become damaged due to expansion OIL SEAL LEAKAGE The three main causes of oil seal failure are as fo...

Page 15: ...liminate ground contact Rapid Blade Wear Cutter not being operated at Reduce ground speed Bolt Hole rated RPM speed Set tractor throttle for proper PTO speed Too much ground speed Use lower gear Poor...

Page 16: ...Never put hands or any other part of body under blocked up assemblies if at all possible 9 Always wear goggles or safety glasses when hammering grinding or drilling metal parts 10 If the assembly cal...

Page 17: ...g hole Tighten all bolts securely 5 4 GEARBOX INPUT SHIELD Remove four existing bolts from around input shaft in front of gearbox Fasten metal shield bracket to gearbox using these bolts Fasten plasti...

Page 18: ...IPMENT QUICKLY IN AN EMERGENCY ALLOW NO CHILDREN OR UNQUALIFIED PERSONS TO OPERATE EQUIPMENT BE CAREFUL ON UNEVEN TERRAIN DECREASE SPEED WHEN TURNING DO NOT OPERATE MOWER IN TRANSPORT POSITION WARNING...

Page 19: ...45 1 11 16 1 1 8 12 UNF 397 538 890 1206 1444 1957 1 7 8 1 1 4 7 UNC 500 678 1120 1518 1817 2462 1 7 8 1 1 4 12 UNF 553 749 1241 1682 2013 2728 2 1 16 1 3 8 6 UNC 655 887 1470 1992 2382 3228 2 1 16 1...

Page 20: ...BUSH HOG L L C P O Box 1039 Selma AL 36702 1039 Telephone 334 874 2700 www bushhog com All manuals and user guides at all guides com...

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