Dynapac BG49 Series Installer manual

CONCRETE EQUIPMENT
CONCRETE EQUIPMENTCONCRETE EQUIPMENT
CONCRETE EQUIPMENT
Manual number : 4700369449_ENG_NO.DOC
Revision : 2
BG49 Power Floats
Instructions and spare parts catalogue

INSTRUCTION MANUAL – BG49
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INSTRUCTION MANUAL – BG49
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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
ASSEMBLY INSTRUCTIONS.............................................................................................7
INSTALLATION OF ENGINE..........................................................................................................................7
INSTALLATION OF OPERATING HANDLE...................................................................................................8
TEST...............................................................................................................................................................8
WORKSHOP TOOLS .....................................................................................................................................8
OPERATING INSTRUCTIONS............................................................................................9
BEFORE STARTING......................................................................................................................................9
STARTING......................................................................................................................................................9
STOPPING......................................................................................................................................................9
MAINTENANCE ..................................................................................................................9
DAILY..............................................................................................................................................................9
WEEKLY (50 hours)........................................................................................................................................9
SPARE PARTS CATALOGUE..........................................................................................10
RANGE OF POWER FLOATS......................................................................................................................11
ACCESSORIES ............................................................................................................................................11
MAINTENANCE KITS...................................................................................................................................11
Engine and clutch..........................................................................................................................................12
Short handle..................................................................................................................................................14
gearbox, spider and ring ...............................................................................................................................16
Gearbox ........................................................................................................................................................18

INSTRUCTION MANUAL – BG49
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GENERAL SAFETY RULES
MACHINES SUBMITTED
Powered with : Electric, Pneumatic, Petrol or Diesel engine.
SYMBOLS
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.
IMPORTANT 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.
SAFETY 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.
WORKING AREA
WARNING
Do not use the machine in explosive environments.

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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.
POWER 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.
STARTING 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.
OPERATION
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.
MAINTENANCE
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.
BE 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.

INSTRUCTION MANUAL – BG49
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GENERAL
The DYNAPAC BG49 is designed for rough and fine machine trowelling of concrete floor.
DESIGN
BG49 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 BG49 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
BG49GS P/N 4700369378
HONDA
Total weight kg - (lb) 112
Rotor diameter mm - (in) 1140 - (44.80)
Blade speed (r.p.m.) 50 to 120
Number of blades 4
POWER UNIT
Engine brand HONDA
Model GX390
Rated power kW - (hp) 8,2 - (11.0)
At (r.p.m.) 3600
Fuel Gasoline
Gasoline tank capacity l - (gal) 6,1 - (1.60)
Noise level
1
LpA dB(A)
LwA dB(A) 93 104
1
measured in air at 1 m from the power floats dB(A) , according to ISO3744.

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BG49GS P/N 4700369378
HONDA
Vibration exposure
2
m/s
2
Uncertainty 5.97
0.50
OVERALL DIMENSIONS
L x w x h (mm) 2176x1196x1010
(in) 85.4 x 47 x 39.8
IMPORTANT
The above information is a general description only, is not guaranteed and contains no warranties of
any kind.
ASSEMBLY INSTRUCTIONS
INSTALLATION OF ENGINE
- Screw in place the four studs (1) on the base (2) (Screw driver 5 mm width). Use Loctite 243 or
equivalent.
Then put the engine in place and secure it with washers (3) and nuts (4) (17mm 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.
Thigthen 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 thihgten 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).
2
According to ISO5379

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- Connect the cable 21 on the stop engine cable and
- Connect the cable 22 on the engine body.
INSTALLATION OF OPERATING HANDLE
- 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 (Cruciformscrew 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.
TEST
CAUTION
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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OPERATING INSTRUCTIONS
CAUTION
KEEP CLEAR OF ROTATING PARTS WHEN OPERATING.
ALWAYS HAVE THROTTLE POSITION AT IDLE WHEN STARTING ENGINE.
NEVER LIFT BY THE GUARD RING.
REMOVE SMOOTHING DISC BEFORE LIFTING.
ALWAYS TEST DEAD MAN HANDLE FOR PROPER OPERATION BEFORE BEGINNING.
NEVER REFUEL WHILE RUNNING OR WHILE ENGINE IS HOT.
REFUEL IN WELL VENTILATED AREA, AWAY FROM SPARKS AND OPEN FLAME.
ALWAY DISCONNECT SPARK PLUG BEFORE SERVICING.
BEFORE STARTING
ALWAYS HAVE THE THROTTLE AT IDLE WHEN STARTING ENGINE
- Check engine oil level.
- Fill gasoline tank.
- Make sure that all blades are at the same angle. If necessary adjust the blade angle.
STARTING
- Turn the fuel valve "ON".
- Set ON/OFF switches on "ON" position.
- Close choke located on the engine only if the engine is cold.
- After the engine starts open choke for smooth running and let the engine warm up for two or three
minutes at idle speed. Adjust the throttle at desired speed and then clamp slowly the dead man handle in
order to start the blades rotating.
STOPPING
- Release the dead man handle.
- Set throttle at idle speed.
- Set the ON/OFF switch to "OFF" position.
MAINTENANCE
DAILY
Clean cement from machine.
Check engine oil level. Add oil as needed to reach up the maximum level.
Do not overfill. Refer to the engine instruction book.
Clean air filter foam cover.
Check blade pitch adjustment for proper operation.
Check "ON-Off" switch and dead man handle for proper operation.
WEEKLY (50 HOURS)
Check blades for excessive wear. If necessary reverse or replace blades.
Change engine oil. Refer to the engine instruction book.
Grease the blade arms (4 grease nipples) with SHELL Retinax HD grease or equivalent.
Check gear box oil level. Add oil as needed to reach up the maximum level. OIL MOBIL SHC634.

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SPARE PARTS CATALOGUE
RESERVDELSTÄLLNING
Följande uppgifter ska lämmas vid beställning av
reservdelar för att undvika leveransfel :
1. Maskintyp.
2. Maskinens seriunmmer.
3. Antal av önskad reservdel.
4. Reserdelens artikelnummer.
5. Reservedelens benämning.
6. Måttupgifter vid beställning av metervara.
ORDERING SPARE PARTS
To avoid errors in delivery, please give the following
information when ordering spare parts :
1. Type of machine.
2. Machine serial number.
3. Quantity required.
4. Part number.
5. Parts description.
6. Dimensions when ordering per length.
ERSATZTEILBESTELLUNG
Zur Vermeidung von Fehllieferungen sind bei der
Bestellung von Ersatzteilen folgende Angaben zu
machen :
1. Mashinentyp.
2. Herstellungsnummer.
3. Bestellmenge. (Quantity)
4. Ersatzteilbenennung. (Part N°)
5. Ersatzteilbenennung. (Description)
6. Massangaben bei Bestellung von Meterware.
ORDINI DI RICAMBI
Per evitare errori nelle consegne di ricambi, Vi
preghiamo di comunicarci le seguenti informazioni al
momento dell ‘ordinazione :
1. Tipo di macchina.
2. Numero di serie della macchina.
3. Quantitá dei pezzi desiderati. (Quantity)
4. Numero di codice del pezzo. (Part N°)
5. Descrizione del pezzo di ricambio. (Description)
6. Misura, in caso di ordine per metro.
PEDIDO DE RECAMBIOS
Para evitar errores en las entregas, deberá indicarse
los siguientes datos al hacer un pedido de
recambios :
1. Tipo de máquina.
2. Número de serie.
3. Cantidad de piezas deseadas. (Quantity)
4. Número de artículo de la pieza de recambio. (Part
N°)
5. Denominación de la pieza. (Description)
6. Indíquese la medida al solicitar un artículo que se
expide por metros.
COMMANDE DE PIECES DE RECHANGE
Les indications suivantes doivent être fournies lors
de la commande de pièces de rechange, afin d’éviter
toute erreur de livraison :
1. Type de machine.
2. Numéro de série.
3. Quantité désirée de pièce de rechange. (Quantity)
4. Numéro de la pièce de rechange. (Part N°)
5. Description de la pièce de rechange. (Description)
6. Longueur en cas de commande par mètre.