GB-9
RANSOMES MASTIFF 91
SAFETY, OPERATORS, MAINTENANCE AND PARTS MANUAL
SPECIFICATIONS
ENGINE SPECIFICATION
TYPE:
Kubota 6.7KW (9.0HP) @ 1800 RPM
camshaft speed, single cylinder, 4
stroke petrol (gasoline) engine, 274cc
(16.71 cu.in), with 12 volt electric start
and recoil start
Model:
GH280 R4S
Maximum Speed:
3200 RPM +/- 25 rpm
Camshaft rotation
1600 RPM (No load)
Idle Speed:
1/- 25 rpm
Camshaft rotation
800 RPM
Oil Sump Capacity:
0.90 litres (1.6 Imp.pints)
(0.95 US qts)
Fuel:
Lead free petrol
Fuel Tank Capacity:
6litres (10.56 Imp. pints)
(6.3 US qts)
MACHINE SPECIFICATION
Chassis:
Pressed steel welded
fabrication.
Transmission:
Gearbox with half speed
reverse to heavy duty roller
chains to landroll and cutting
cylinder.
Clutches:
Main centrifugal clutch.
Seperate landroll clutch.
Seperate cylinder clutch.
Front roll:
One piece steel roll running
on ball bearings.
Landroll:
3 piece cast iron with
machine cut gear differential
running in oil bath, and
expanding shoe brake.
Cutting cylinder:
All welded 6 or 9 knife
cylinder running on ball
bearings.
Cutting ratio:
65 or 100 cuts / metre
(60 or 90 cuts / yard).
Height of cut:
13- 35mm (1/2 -1 3/8in.)
Handles:
Tubular steel adjustable at
top.
Grassbox:
Large capacity fibreglass
tip-over
Cutting width:
91cm (36in.)
Cutting performance:
2500 sq. m./hour (3000 sq. yd./ hour) with trailing
seat
3360 sq. m/hour (3900 sq. yd./hour) with trailing
seat & outrigger units.4850 sq. m./hour (5800
sq.yd./hour)
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Gearbox oil: SAE 15W-40
Landroll oil: SAE 15W-40
Grease:
Shell Darina R2 or equivalent.
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DIMENSIONS
Overall height over lift lever:
1.27m (50in)
Overall length with steering seat
and grass box:
2.16m (85in)
Overall width :
1.12m (44in)
Width of cut:
91cm (36in)
Gross weight: (including grassbox) 350Kg (773lb)
VIBRATION LEVEL
The machine was tested for whole body and hand/
arm vibration levels. The operator was seated in
the normal operating postion with both hands on
the steering mechanism. The engine was running
and the cutting device was rotating with the
machine stationary.
Standard ISO 5349: 1986 Mechanical vibration.
Guidelines for the measurement and the
assessment of human exposure to hand-
transmitted vibration.
Standard ISO 2631-1: 1985 Evaluation of
human exposure to whole body vibration —
Part 1: General requirements.
RECOMMENDED LUBRICANTS
Engine oil:
Should be to MIL-L-2104B/ or to A.P.I.
Classification SC grades and as given in the table
below:
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