Attaching Rotavator To The Tractor; Depth Control; Rotors - Howard ROTAVATOR 300 Operating Instructions Manual

Rotavator 300
Fig. 4
Fig. 6
ATTACHING THE ROTAVATOR TO THE
TRACTOR
All models have dual mounting position, i.e. central or off-
set to the right. Offset mounting is achieved by repositioning
the lower link mounting brackets. (fig.4)
The PTO drive shaft must be set to a safe working length to
ensure the male shaft does not "bottom" or separate from
the female tube under all conditions of use and transport.
To determine the correct mounting position: with the
Rotavator on a firm level surface the Depth Control
equipment should be adjusted until the gearbox input shaft
is horizontal (fig.5). Position the tractor at a distance from
the Rotavator to give 150 mm (6") minimum engagement
of the male half of the PTO drive shaft in the female tube
when connected to the tractor. This establishes the safe
working length of PTO drive shaft for connection to the trac-
tor.
Position the tractor lower link ball joints in line with the
mounting pins. Connect the tractor lower links. Fit the trac-
tor upper link and secure. Attach the PTO dirve shaft to the
pressure plate by the studs and tighten the nuts. Attach the
PTO drive shaft guard chains to the tractor and Rotavator.
Attach stabilizer bar or check chains to limit sway to 50 mm
(2"). Adjust tractor linkage to level Rotavator laterally and
longitudinally (fig. 5 and 6). Before engaging the tractor
PTO, lift the Rotavator on the hydraulic lift linkage until the
PTO dirve shaft attains an angle of 40 º and set the limit
stop on the hydraulic lift control quadrant. (fig. 5)
ATTENTION! : THE PTO DRIVE SHAFT
!
ANGLE MUST NEVER EXCEED 40º.
Finally check that during transport and use the PTO drive
shaft does not "bottom" or separte and that the maximum
angle of 40 º is not exceeded. Should it not be possible to
obtain the aforementioned setting with your tractor, SEEK
ADVICE, it may be necessary to reduce the length of the
PTO drive shaft by cutting.
Fig. 5

Depth control

Fig. 7 illustrates how to adjust the depth control skids.
ROTOR AND BLADES
R300 Rotavators are fitted with original HOWARD BLADES
model 665149/150. See fig. 8 where the left blade is marked
with X. Use always only ORIGINAL HOWARD BLADES
and HOWARD.blade bolts.
Fig. 9
The blades must form a «scroll» patern (fig. 9). This ensure
that they enter the soil at regular intervals to even out the
load on the transmission.
When replacing worn blades, remove one blade and fit the
new one in its place before proceeding to the next. This will
ensure that the blade «scroll» patern is mantained.
X
Fig. 8
Fig. 7
19