2.3.1.1 Technical information
DS-521D, DS-521DB
Unit
DS-521D
DS-521DB
Length
mm
1730
Width (including the side screen)
mm
763
Height
mm
1180
Weight
kg
64
63
Maximum cutting width
cm
58,5
Safe climbing ability
∠
10°
Cutting disk revolutions
min
-1
1990
Maximum blade circumferential velocity
m.s
-1
60,9
Travelling speed
km.h
-1
2,0
Area capacity
m
2
.h
-1
1170
Gearbox oil capacity
l (litre)
0,025
Gearbox oil quality
API
GL-4 (GL-5)
SAE
90 (80W-90)
Tab. 4: Technical information for DS-521D, DS521DB
2.3.1.2 Engine information
Engine
Unit
Value
Type
-
HONDA GCV-160
Briggs & Stratton 675 Series
TM
Engine displacement
cm
3
160
190
Bore x stroke
mm
64 x 50
68,3 x 51,8
Max. power/at rpm (HP)
kW/min
-1
(HP)
3,3/3600 (4,4)
2,7/3200 (3,6)
Max. torque/at rpm
N.m/min
-1
9,4/2500
9,2/3060
Maximum (set) engine rpm
min
-1
3200 ± 100
3200 ± 100
Fuel consumption
l (litre)
1,1 at 3000min
-1
1,55 at 3060min
-1
Maximum engine tilt (long period)
∠
20°
15°
Maximum engine tilt (short period
∠
30°
30°
Fuel tank volume
l (litre)
0,91
1
Fuel
(unleaded) petrol
ON 91-95
ON 91-95
Engine oil filling
l (litre)
0,55
0,6
Oil quality
SAE
SAE 10W-30
SAE 30
SAE 10W-30
SAE 30
Ignition plug
-
NKG BPR6ES
CHAMPION RJ19LM
BRISK LR15YC
BRISK JR 19
Tab. 5: Engine technical information
2.3.2 Description of the machine and its parts
Brush cutter DS-521D, DS-521DB (
Pict.3
) is built on a steel frame, to which all important parts of the machine are attached. All
controls
(1,2 and 4)
are placed on the handlebars. Handlebars are attached to the frame with a
bolted
connection
(3) and their height is adjustable into 3 positions.
Handles
(12) secure a firm grip and machine handling during work. On the left side of the handlebars, there is the
wheel drive clutch
lever (2) which
controls the movement of the machine in forward direction. On the right side, there is lever (1) of the disc drive clutch for turning the cutting disk drive on
(off). Both control levers return to their original position when the handlebars are released in a critical situation and disconnect the engine power transfer.
The cutting disk is equipped with an
automatic brake
which stops the disk. Engine speed is controlled with an
accelerator lever
(4). The wheel drive is
controlled by worm-gear unit with a belt clutch which provides fluent power transfer onto the wheels (15) (the machine does not start with a jump). The
gearbox and clutch are covered by a plastic
gearbox cover
(16). There is the
cutting disk
(7) with four
steel blades
(8) in the front part. The attendant is
protected against flying parts of the cut stand by plastic
cover
(10) and cutting disc
steel cover
(9) which meet the
EN 12 733
standard. A detachable
side
screen
(6), which is attached with a
bolted connection
(5), controls the line spacing.
47
Actual rpm. of the disc when not cutting, including belt transmission losses.
48
Square meters cut per min./hour will vary, depending on the type of the stand.
49
Measured according to new
Society of Automotive Engineers (SAE) J1349
standard
50
Measured according to new
Society of Automotive Engineers (SAE) J1349
standard
51
Short period – up to 1 minute.
52
Measured according to new
Society of Automotive Engineers (SAE) J1349
standard
53
The automatic break is an active protective feature that supports the machine’s safety.
20
Summary of Contents for DS-521D
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