Dynapac BG39 Series Installer manual

CONCRETE EQUIPMENT
CONCRETE EQUIPMENTCONCRETE EQUIPMENT
CONCRETE EQUIPMENT
Manual number : 4700369451_ENG_NO.DOC
Revision : 4
BG39 Power Float
Instructions and spare parts catalogue

INSTRUCTIONS MANUAL – BG39
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SUMMARY
GENERAL SAFETY RULES...............................................................................................4
Machines submitted........................................................................................................................................4
Symbols...........................................................................................................................................................4
Important rules for your safety ........................................................................................................................4
Safety equipment ............................................................................................................................................4
Working area...................................................................................................................................................4
Power supply...................................................................................................................................................5
Starting the machine .......................................................................................................................................5
Operation.........................................................................................................................................................5
Maintenance....................................................................................................................................................5
Be alert............................................................................................................................................................5
GENERAL ...........................................................................................................................6
DESIGN...............................................................................................................................6
TECHNICAL DATA .............................................................................................................6
DIMENSIONS......................................................................................................................7
Working position .............................................................................................................................................7
Transport position ...........................................................................................................................................7
ASSEMBLY INSTRUCTIONS.............................................................................................8
INSTALLATION OF ENGINE BG39................................................................................................................8
INSTALLATION OF OPERATING HANDLE BG39 ........................................................................................9
INSTALLATION OF BLADES .........................................................................................................................9
TEST...............................................................................................................................................................9
WORKSHOP TOOLS .....................................................................................................................................9
ASSEMBLY INSTRUCTIONS BG39CC............................................................................10
INSTALLATION OF ENGINE BG39CC ........................................................................................................10
INSTALLATION OF OPERATING HANDLE BG39 CC................................................................................11
TEST.............................................................................................................................................................11
WORKSHOP TOOLS ...................................................................................................................................12
OPERATING INSTRUCTIONS..........................................................................................12
BEFORE STARTING....................................................................................................................................12
STARTING....................................................................................................................................................12
STOPPING....................................................................................................................................................13
FOLDABLE HANDLE....................................................................................................................................13
MAINTENANCE ................................................................................................................13
DAILY............................................................................................................................................................13
WEEKLY (50 hours)......................................................................................................................................13
SPARE PARTS CATALOGUE..........................................................................................14
RANGE OF POWER FLOATS......................................................................................................................15
ACCESSORIES ............................................................................................................................................15

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MAINTENANCE KITS...................................................................................................................................15
Dead man clutch...........................................................................................................................................16
Centrifugal clutch ..........................................................................................................................................18
Handle BG39GS............................................................................................................................................20
Handle BG39GF............................................................................................................................................22
Handle BG39GS with centrifugal clutch........................................................................................................24
Handle BG39GL............................................................................................................................................26
Lower part BG39 (for serial numbers after february 2006) ...........................................................................28
Lower part BG39 (for serial numbers before february 2006)........................................................................30
Centrifugal clutch ..........................................................................................................................................32

INSTRUCTIONS MANUAL – BG39
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GENERAL SAFETY RULES
M ACHINES SUBMITTED
Powered with : Electric, Pneumatic, Petrol or Diesel engine.
S YMBOLS
The words WARNING and CAUTION used in safety instructions, have the following meanings :
WARNING indicates hazards or hazardous procedures which could result in serious injury or death ,
if the WARNING is not observed.
CAUTION indicates hazards or hazardous procedures which could result in injury or damage to
equipment if the WARNING is not observed.
I MPORTANT RULES FOR YOUR SAFETY
WARNING
The machine must not be modified without prior consent of the manufacturer. Use only original parts.
If modifications are made without prior consent of the manufacturer there is a risk of serious injury to
the personal.
These safety recommendations have been compiled from international safety standards.
Local regulations must also be checked and observed. Before using the machine, read carefully
these instructions and keep them in a safe place.
Make sure that the signs about using, safety, and maintenance are always legible.
The use of the machine is restricted to the applications specified in the product literature.
Always change damaged parts immediately. Change wear parts in due time.
S AFETY EQUIPMENT
WARNING
The admissible sound level of 85 dB (A), can be exceeded because of the machine and/or the
application. Long time exposure to loud noise without ear protectors can cause permanent damage
to hearing.
Long time exposure to vibrations can damage the hands, fingers and wrists. Do not use the machine
if you are experiencing discomfort, cramp or pain. Consult a doctor before working again with the
machine.
Always use approved safety equipment. The following safety equipment applies to operators and
other personnel in the immediate vicinity of the working zone.
Safety helmet.
Ear protectors.
Dust mask in dusty environments.
Protective gloves.
Protective shoes.
Goggles.
To avoid the risk of clothes being caught in the machine, avoid wearing loose-lifting clothes. If you have long
hair, cover it with a hair net.
W ORKING AREA
WARNING

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Do not use the machine in explosive environments.
Do not operate a machine powered by a petrol or diesel engine in poorly ventilated spaces. These
types of engines produce toxic gases which can cause serious health troubles.
P OWER SUPPLY
WARNING
Make sure that the power supply equipment complies with the relevant safety requirements of the
local and the international standards.
- Electric machine: It must be ensured that the machine is connected to the voltage and the
frequency specified on the name plate. The power supply cable has to be properly sized. Check
that the cable and the plug of the machine are not damaged. Never switch off the machine by
pulling the plug from its socket. Use the machine switch. Keep the cable out of the moving parts
of the machine.
- Pneumatic machine: Check that the compressed-air hose and the hose coupling are not
damaged. Never attempt to loosen a compressed-air hose which is pressurized. First switch off
the air at the compressor and then leave the machine running itself to discharge the hose after
some seconds.
- Machine powered by petrol or diesel engine: Petrol has an extremely low flash-point and can
be explosive in certain situations. Keep away from all hot or spark-generating objects, do not
smoke, when handling fuel. Wait until the machine has cooled before filling the tank. Avoid
spilling petrol or diesel on the ground.
S TARTING THE MACHINE
CAUTION
Before starting make yourself familiar with the machine and make sure that the machine does not
show any obvious faults. Then start the machine according the instruction and spare parts
catalogue.
O PERATION
CAUTION
Use the machine only for the purpose for which it is intended. Make sure you know how to stop the
machine quickly in the event of an emergency situation. Do not touch rotating parts during operation.
M AINTENANCE
CAUTION
Maintenance work must only be carried out by skilled personnel. Keep unauthorized persons away
from the machine. Do not carry out maintenance work while the machine is moving or the engine is
running. Never use a machine which is damaged.
B E ALERT
CAUTION
Always concentrate on what you are doing. Use common sense. Never operate the machine if you are
tired or under the influence of drugs alcohol or other substances which can affect your vision,
reaction, ability or judgement.

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GENERAL
The DYNAPAC BG39 is designed for rough and fine trowelling of concrete floors.
The original manual is in English.
DESIGN
BG39 is driven by a four stroke petrol engine (1).
They are equipped with a dead-man handle (2) which stops the rotor as soon as it is released or if the
operator loose control of the operating handle (3).
The engine power is transmitted to the rotor supporting the blades (4) through a V belt clutch and a reduction
gear box (5). The blades are protected by a guard ring (6).
The blade control knob (7) provides an accurate and easy adjustment of the blade pitch.
The rotation speed of the blades should be adjusted by the throttle lever (8).
The engine stop is controlled by an ON-OFF switch (9) which avoid to loose the operating handle to stop the
engine.
The BG39 can be equipped of short or long operating handle.
1 Petrol engine .
2 Dead-man handle .
3 Operating handle .
4 Blades .
5 Reduction gear box .
6 Guard ring .
7 Control knob .
8 Throttle lever .
9 ON-OFF switch .
TECHNICAL DATA
BG39GF BG39GL
Total weight kg - (lb) 76 – (167,5) 88 – (194)
Rotor diameter mm - (in) 890 - (35) 890 - (35)
Blade speed (r.p.m.) 50 to 120 50 to 120
Number of blades 4 4
POWER UNIT
Engine brand HONDA
Model GX160 QX
Rated power kW - (hp) 3.6 (4.8)
At (r.p.m.) 3 600
Fuel Gasoline

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BG39GF BG39GL
Gasoline tank capacity l - (gal) 3.10 - (0.8)
Noise level
1
LpA dB(A)
LwA dB(A)
93
104
Vibration exposure
2
m/s
2
Uncertainty 7,50
1.08 3.12 0.47
OVERALL DIMENSIONS
L x w x h (mm) 1 800 x 930 x 1 010 2530 x 930 x 1 010
(in) 70.9 x 36.6 x39.8 100 x 36.6 x39.8
IMPORTANT
The above information is a general description only, is not guaranteed and contains no warranties of
any kind
DIMENSIONS
Dimensions in mm
W ORKING POSITION
T RANSPORT POSITION
1
measured in air at 1 m from the power floats dB(A) , according to ISO3744.
2
According to ISO5379

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ASSEMBLY INSTRUCTIONS
INSTALLATION OF ENGINE BG39
- Available for BG39 kit (without engine) P/N 4700369605 or for engine replacement.
- Screw in place the four studs (1) on the base (2) (Screw driver 5 mm width). Use Loctite 243 or
equivalent.
4 x washers (5) have to be placed between the engine and the base.
Then put the engine in place and secure it with washers (3) and nuts (4) (13mm flat spanner).
- Put in place the drive pulley (6) on the engine shaft without screwing the locking screw. Do not forget the
key (7).
- Install the cover holder on the engine and tight it with screws (8) and washer (9) (13mm flat spanner).
- Mount the complete lever (10) on the engine use 1 x washer (11) between the nut (12) and the engine.
Tighten the screw (13) and then secure it with nut (12) (2x13mm flat spanner) in order to let the complete
lever praticly free in rotation.
- Put in place the V-belt (14) and tighten locking screws (15) in order to get the 3 x pulleys in line (3mm
Hexagonal spanner).
- Hook the spring (16) to the guide screw (17).
- When bending the V-belt by hand, using lever (10) the gap between guide screws and V-belt should be
approx.3 mm. If necessary adjust the gap with screw (18) and washer (19) (5mm Hexagonal spanner +
17mm flat spanner).
- Connect the cable 21 on the stop engine cable and
connect the cable 22 on the engine body.

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INSTALLATION OF OPERATING HANDLE BG39
- Take off the 4 x nuts and washers from the base . Then put in place the operating handle and secure it
with washers and nuts ( 17mm Flat spanner).
- Slide the electrical cable inside the protective tube of the operating handle and connect it to the ON/OFF
switch.
- Hook up the throttle cable for each particular engine (Cruciform screw driver) . When throttle control is
fully pushed in, engine throttle control should be against idle adjustment stop . If adjustment in cable
length is necessary , make adjustment at handle end of the cable (3mm Screw driver).
- Dismantle the V-belt cover (10mm Flat spanner). Then slide the clutch cable through the adjusting screw
of the guard ring and through the tensioning lever hole . By hand let the tensioning lever bend slightly the
V-belt and then tighten the tensioning lever screw (3mm Screw driver). Ensure that when the dead man
handle is grip the V belt is normally tensioned and when it is released the V belt is not tensioned.
- If necessary make adjustment of tensioning by the adjusting screws situated at each end of the cable .
- Put in place the V-belt cover.
- Turn trowel control knob in a counter-clockwise direction until rotation is impossible. Take off the pin from
the fork, slide the cable into the fork and then secure it with the pin.
INSTALLATION OF BLADES
- Slip the blade in place on the trowel arm.
- Secure the blades with the spring clips supplied (2 per blades).
TEST
ALWAYS HAVE THE THROTTLE AT IDLE WHEN STARTING ENGINE
- Check engine oil level.
- Fill gasoline tank.
- Set ON/OFF switches on "ON" position (on engine and operating handle).
- Start the engine (see engine operating manual) and if necessary adjust throttle cable and clutch cable for
proper operation.
- Set the engine to 3000 rpm (see engine instruction manual).
WORKSHOP TOOLS
- 1x Screw driver 5 mm width.
- 1x 10mm Flat spanner.
- 1x 17mm Flat spanner.
- 2x 13mm Flat spanner.
- 1x 3mm Hexagonal spanner.
- 1x 5mm Hexagonal spanner.
- 1x Screw driver 3 mm width.
- 1x Cruciform screw driver.

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ASSEMBLY INSTRUCTIONS BG39CC
INSTALLATION OF ENGINE BG39CC
Available for BG39CC Kit (without engine) P/N 4700369607 or for engine replacement .
-4 washers have to be placed between the engine and the base.
-Put in place the engine on the plate (3) and secure it with washers (1) and screw (2) (13mm flat spanner)
.
-The clutch (4) and the key (5) (delivered with the HONDA engine) on the engine shaft .
-Then screw in place the cover holder (6) on the engine flange with screws (7) and washers (8) (13mm flat
spanner ) .
-Secure the clutch with spacer (9) and screw (10) (17mm flat spanner .
-Put in place the V-belt (11) and tighten it with the pulley (12) (8mm hexagonal spanner and 17mm flat
spanner) Put in place the V-belt cover with washers (15) and screws (16) (13mm flat spanner).
- Connect the cable 17 to the stop engine cable .