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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 305 306
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