ADJUSTMENTS
ROAD
WHEELS
Each road wheel
IS
mounted on its hub by a friction
clutch device. These are adjusted so that the wheels
have sufficient
grip to pull the machine, but will slip if
they become jammed
wlth an obstruction between the
wheels and the frame.
For normal adjustment, tighten each of the four nuts to
fully compress the springs, then slacken back each nut
half a turn
Should the wheels appear not be driving, check that
the adjustment is correct.
DRIVE CHAIN
Correct drive cha~n tenslon is as Important as correct
lubrication.
Total up and down movenlent should be
no more than in
(9.5
nim.) to
:
in.
(1
2.5
mm.) Check
wlth
a
suitahle screwdriver Inserted through the oil
filler hole on the top
side
of
the
chaincase. Turn the
screwdriver to
grlp the cha~n between the links. Loosen
the locknut
on the external adiuster on
the
bottom front
of the
chaincase, and screw
In
the adjl~stln<] screw to
increase
chain tenslun Re- t~ghterl t1-i~ locknut
CLEANING CHAINCASE
After
250
hours of worh the ctlalncase should be
cleaned out
Unscrew
<]I! the bolts securlny the chain-
case to the bdckplate allovv~n<l
the
chalncase o~l to
dra~n out frorri the jolnt
no drain plug 1s fitted Remove
the cover
ensuring
that the gasket
IS
not damaged and
wash out the
lnslde of the case and the chaln wlth
petrol or kerosene Re-assemble, and
fill
wlth
,:
pint
(
25
Iltre)
SAE
90
gear
011
CLEANING GEARBOX
The gearbox must also be cleaned out after
250
hours
work Unscrew the
dra~n plug on the bottom right-hand
inner side of the gearbox and drain the box immediately
after a period of
runnlnq The
011
will be warm and free-
running and any sedlment
will
be
in suspension in the
oil. Replace the
drarn plug and ref111 the gearbox with
about
6
pints
(3.4
litres) of
flushing
011
Run the machine
for about
3
minutes wlth the rotor well clear of the
ground, then drain the flushing oil. Refill the gearbox
wlth
6
pints
(3.4
Iitres) of good quality
SAE
90
gear oil.
ROTOR
FRlCTlOlU DRIVE
The rotor to
which
the blades are bolted is driven direct
frorn the main gearbox through a friction clutch. This
clutch should only operate
when the rotor blades strike
an obstacle, when despatched from the factory the
clutch is adjusted so that no slip occurs
znder normal
working conditions. If the clutch appears
io slip too
easily, it can be adjusted by tightening the four clutch
nuts to fully compress
the
springs. then slackening back
each nut half a turn.
AIR
CLEANER
The air cleaner oilbath oil level must be checked every
10
hours, or every
5
hours In very dusty conditions.
Every
250
hours, the air cleaner lntcrior must be cleaned
out. Undo the two nuts
beh~rlcl
the air cleaner, to
separate the air cleaner from the support bracket on the
main frame, and undo the
jutjllee
clip
on the end of the
air cleaner hose to disconnect the cleaner completely.
Remove the black,
domed pre-cleaner from the top of
the air cleaner, and flush out
the interior of the air
cleaner with paraffin or kerosene, to
remove all dirt and
dust frorn the wire gauze elements
inslde.
When clean, refit the pre-cleaner and secure the air
cleaner on the support bracket. Re-connect the hose.
MAINTENANCE
OF BLADES
Only the cutting edges of the blades should rub in the
soil: the backs of the blades
should be clear
The blades are so deslgnecj that use In average so~ls
should keep them sharp. If the <]round is very stony
however,
~t
IS
recon~rnended that two
sets
of hoe blades
be used alternately, so
that
one set may be kept
sharpened
The
efficiency
of the machine is determlned largely by
the condition of the blades. If they are left bent or
dls-
Iorted through strlking solid obstacles in the ground,
they will requlre double the power to drlve. the quality
of the work will be poor and the blades
will
wear much
more quickly. Trouble w~ll also arise with clogging
under the shield Blades must therefore be examined
daily and any bent ones replaced
immediately
ROTOR
FLANGE
WEEDCUTTERS
Two weedcutter blades are provided, one at each side
of the machine, to prevent long grass or weeds binding
around the end rotor flanges. The blades are slotted and
secured by two setscrews each, and should be adjusted
so that they just clear the rotor flanges when the rotor
is turned BY
HAND.
Severe power losses will occur in
weedy conditions unless these blades are correctly
adjusted.
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