Howard Gem Operating Instructions Manual
Howard"
Rotavator" Gem
"
and Super
Gem
Operating
+
>.
Instructions
-
-
.:
GENERAL
SAFETY
PRECAUTIONS
1.
Read and familiarise yourself with the
operating instruction book.
2. Do not allow children to operate the machine.
Do not allow adults to operate the machine
without proper instructions.
3. Clear the work area of objects which might be
picked up and thrown.
4.
Before attempting to start -the machine ensure
the gear lever
is
in neutral and the rotor drive
disengaged.
5.
Never tamper with the reverse gear mechanism,
this
is
a safety device.
6.
Disengage the rotor drive before reversing or
turning the machine.
7.
Work up and down the face of steep slopes,
never across them.
8.
Handle petrol with care
-
Use an approved petrol container.
Never remove the cap of the fuel tank or add
petrol to a running or hot engine, or fill the
tank indoors. Wipe up spilled petrol.
9.
Open doors if the engine is run in the garage
-
exhaust fumes are dangerous.
1.0.
Keep all nuts, bolts and screws tight and be
sure that the equipment is regularly lubricated
to keep
it
in a safe working condition.
11. Keep all safety guards in place.
12. Never touch the rotor with the engine
running
-
switch off first.
13. Always wear substantial footwear to provide
as much protection
as
possible.
14. The warning transfer (part number 27409)
illustrated below should always be in position
on
your machine. If, for any reason
it
is
missing
a replacement will be supplied free of charge.
WARNING
beware of rotating
blades
see
there
is
no
one
in
the
direction of driving
Howard
Rotavator
Gem
and
Super
Gem
Operating
Instructions
CONTENTS
Aircleaner
.........................
8
Blade maintenance
......................
8
Cleaning chaincase
......................
8
Cleaning gearbox
.......................
8
Drive chain
.........................
8
Roadwheels
........................
8
Rotor flange weedcutters
....................
8
Rotor friction drive
......................
8
Attachments
.........................
10
Depth control wheel
.....................
10
Furrower
..........................
10
Pictine rotor
........................
10
............................
Controis
3
....................
Lubrication and maintenance
5
Lubrication and maintenance chart
................
6 & 7
Making the most of your Gem
....................
11
.........................
Rotor and blades
9
Serial number
..........................
2
Specifications
..........................
2
.......................
Working the machine
4
........................
Your new machine
3
The Howard Gem is
THE
heavy duty hand-controlled
Rotavator for growers. farmers and contractors
.
From seedbed making to land reclaiming. catch cropping to
weed control. mixing-in manure to breaking up pasture. the
work power and engineering quality of the Gem are
unequalled
.
The Gem has three forward gears providing the right speed
for any type of work or soil condition
.
A
reverse gear gives
ease of handling in confined areas; adjustable handlebars.
up or down. side to side. aid operator comfort and
flexibility of control
.
Simple construction and a proven design keep maintenance
to
a
minimum
.
Optional attachments include a furrower. depth control
wheel and front-end weights
.
SPECIFICATIONS
ENGIIVE
LANDSPEEDS
(at
2800
rpm)
STANDARD
GEM
Kohler K301T 4-stroke petrol producing 11 hp
(rnax.)
at
2800 rprn governed engine speed. 22 Ib-ft
(30
Nm) torque
at
2200 rprn or
Hatz
E780 4-stroke diesel producing 9 hp (max.)
at
3000 rprn governed engine speed. 19 Ib-ft
(25.75
Nm) torque
at
2100 rpm.
SUPER GEM
Kohler
K341T 4-stroke petrol producing 15 hp
(rnax.)
at
2800 rprn governed engine speed. 28 Ib-
ft 138 Nm) torque
at
2600 rprn or
Hatz
E785 4-stroke diesel producing 11 hp (rnax.)
at
3000 rprn governed engine speed. 23 Ib-ft
(31 Nm) torque
at
2100 rpm.
FUEL
CAPACITY
9
litres (2 gallons).
TRANSMISSIQN
Three forward speeds, one reverse. Transmission by
hardened gears running in oi
I. All shafts mounted on
ball-bearings. Full differential for easy turning, with
automatic locking when rotor is engaged. Safety
clutch with slip action when under shock load.
CLUTCH
Heavy duty two-plate dry type.
CONTROLS
1. Rod-operated clutch lever with safety reverse
interlock.
2. Engine governor control by
Bowden cable.
3.
Rod-operated gear lever.
4. Rod-operated rotor engagement lever.
5.
Handlebars adjustable for height and sideswing.
6. Depth setting lever.
WHEELS
4.00
-
12 2-ply traction tread pneumatic tyres.
Tyre pressure 1.4
kg/cm2 (20 1b/in2).
ROTOR
Rotor speed 188 rprn
at
2800 rprn engine speed.
Rotor widths 51 cm (20 in) Standard GEM only.
61 cm (24 in) Standard and Super
GEM.
76 cm (30 in) Super
GEM
(diesel)
on1
y.
DEPTH
OF
CUT
Adjustable to 23 cm (9 in) maximum.
1
st
gear
1.54
km/h (0.96 mile/h).
2nd gear 2.3 km/h (1.46 milelh).
3rd gear 4.9 km/h (3.05 mile/h).
Reverse 2.9 km/h (1.85 mile/h).
OIL CAPACITY
Gearbox
-
3.4 litres (6 pints)
Chaincase - .25 litre ( ;pint)
Engine - see Engine handbook
DIMENSIONS
Length: 203 cm (80 in)
petrol:208 cm (82 in) diesel:
Height to top of handlebar: 104 cm (41 in).
Width: 63 cm (25 in)
-
51 cm (20 in) rotor.
74
cm (29
in)
-
61 cm
(24
in) rotor.
89
cm
(35
in)
-
76
cm (30
in) rotor.
WEIGHT
(Approx.)
Standard GEM - Kohler engine.
292 kg (644
Ib) - 50 cm (20 in) rotor.
305 kg (672
Ib) - 61 cm (24 in) rotor.
Standard GEM
-
Hatz engine.
296 kg (652
Ib)
-
50 cm (20 in) rotor.
306 kg (674 Ib) - 61 cm (24 in) rotor.
Super
GEM
-
Kohler engine.
312 kg (688
Ib) - 61 cm (24 in) rotor.
Super GEM
-
Hatz engine.
338 kg (746
Ib) - 61 cm (24 in) rotor.
391 kg (862
Ib) - 76 cm (30 in) rotor.
EXTRA EQUIPMENT
Depth Control Wheel; Furrower;
Pictine Rotor.
Front-end Weights.
RECOMMENDED LUBRlCAlVTS
SAE
90
-
Gearbox and chaincase.
Engine Oil
-
Rotor Dog Clutch;
rotor stub axle;
depth control wheel (if fitted).
SERIAL NUMBER
The serial number of the Gem
is
stamped on the
plate fixed to the left-hand top side of the front
shield, and on the main frame top side near the
handlebar pivot.
For future reference, record the serial number in
the space below:
..................................
Gem Serial No
Date Purchased
.................................
YOUR
NEW
MACHINE
On receipt of your new "Gem" first read and study the
instruction manuals for both engine and machine.
Satisfactory performance and a long working life for your
Rotavator will depend upon your following the instructions given. Be certain to keep the manuals in a safe,
convenient place ready for quick reference.
When in need of spare parts or service, contact your
Howard dealer. He has genuine replacement Howard
parts, and trained, experienced staff to service your
machine correctly.
Before starting to use your "Gem", first fill the fuel tank,
check the gearbox and chaincase oil levels, and the
lubrication points. Check that all nuts and bolts are
tight.
Run the machine lightly at first, and gradually increase
the loads during the first
25
hours work. NEVER allow
the engine to labour during this running-in period.
After the first five hours of operation, check all nuts and
bolts for tightness, including the two wheel hub centre
nuts.
CONTROLS
HANDLEBAR
ROTOR
IGNITION
ENGAGEMENT
LEVER
9a
B
THROTTLE
CONTROL
EAR
LEVER
Loading...