Master FWT40 User manual

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OPERATION MANUAL
FWT40
Walk-behind Power Trowel
P E R F O R M A N C E · E F F I C I E N T · R E L I A B L E

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Master sincerely thanks you for selecting the Plate
Compactor Machine. For your Safety and proper operation,
before you start to operate or carry out any maintenance on
this equipment, YOU MUST READ and STUDY this manual
carefully. Be sure to always keep it ready for reference.
Produced By Henan Master Machinery Co.,Ltd
Dear Customer,
Thanks for choosing Master machine.
To ensure the safety and proper use of the machine,
please read the instruction book carefully before use.
Also, please fill this card and save it for warranty use.
Buyer Name
Purchase
Time
Tel
Contact
Person
Address
Product
Name
Power Trowel
MODEL
FWT40
Motor Model
Note

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FOREWARD
◇For your own safety and protection from bodily injuries, carefully read,
understand and follow the safety instructions in this manual.
◇Please operate and maintain your machine in accordance with the
instructions in this manual.
◇Defective machine parts are to be replaced as soon as possible.
◇Keep this owner's manual handy, so you can refer to it at any time.
◇No part of this publication may be reproduced without written permission.
◇We expressly reserve the right to technical modifications- even without
express due notice - which aim at improving our machines or their safety
standards.
FEATURE
FWT40 Walk-behind Power Trowel can be used in surface finishing of
concrete road, terrace, boatyard, airport and floor etc.
Deadman switch design provide safe. A sophisticated system to protect
the operator from an out-of-control spinning handle. When the operator is
using a walk-behind power trowel and let go of the safety sensor detects
the motion of the handle and stops the engine before the handle reaches a
45-degree rotation. The handle can be adjusted due to the stature of
operator, and it offers maximum control and comfort for the operation. The
alloy blades which have get heat treatment are worn well. Low center of
gravity provides workers with safe and stable operation.
SAFETY PRECAUTIONS
1. Before starting operation, the operator has to check that all control and
safety devices function properly.
2. Always keep unauthorized, inexperienced, untrained people away from

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this machine.
3. Rotating and moving parts will cause injury if contacted. Make sure
guards are in place. Keep hands and feet away from moving parts.
4. The engine must always be stopped before attempting any repair or
adjustments. Ignition switch should be off.
5. To avoid slipping and loss of control when starting the trowel, the
operator should maintain good footing. It is recommended that the
operator wear safety shoes for added protection.
6. Be careful when working around pipes or ducts protruding from the floor
or slab edges. If the trowel blades hit such obstacles, damage to the
machine or possible operator injury may result.
7. When starting the machine, do not exceed 1/3 throttle position. A higher
setting may cause the Centrifugal clutch to engage and the handle to
rotate.
8. Be careful not to come in contact with the muffler when the engine is hot,
serious burns may result!
8. Over time, the blades will form a sharp edge. Be careful when handling
the old blades.
9. Gasoline is extremely flammable, and gasoline vapor can explode.
Refuel outdoors, in a well-ventilated area, and keep other flames and
sparks away.
10. Do not fill the fuel tank completely. After refueling, tighten the fuel tank
cap securely.
11. Before beginning your preoperational checks, be sure the engine is
level and the engine switch is in the OFF. The max. gradient of 20° must
not be exceeded when the engine working.
12. Don't allow children to operate the engine. Keep children and pets away
from the area of operation.
13. After each use your machine should be cleaned to remove any dust and

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debris from the undercarriage and surrounding components.
14. When the machine start working you should be check the clutch
whether or not wear and tear. If the clutch will have 3/4 worn and torn,
you must change new clutch-ring.
15. Check that all shields and covers are in place, and all nuts, bolts, and
screw are tightened when the machine working. Make sure put the
cable while the machine working.
MAINTENANCE RECORD
Due to the nature and environment of use, Walk-behind Power
Trowels could be exposed to severe operating conditions. Some
general maintenance guidelines will extend the useful life of your
trowel.
1. The initial service for your trowel should be performed after 25 hours of
use, at which time your mechanic (or authorized repair shop) should
complete all of the recommended checks in the schedule below. The
chart is handy for keeping a record of the maintenance performed and
the parts used for servicing your trowel.
2. Regular service according to the schedule below will prolong the life of
the Walk-behind Power Trowel and prevent expensive repairs.
3. Keeping your Walk-behind Power Trowel clean and free from debris is
the single most important regular maintenance operation, over and
above the checks in the service schedule above, that can be performed.
After each use your Walk-behind Power Trowel should be cleaned to
remove any dust and debris from the undercarriage and surrounding
components. Use of a power washer will make clean up quick and easy,
especially if a non-stick coating was applied prior to use.
4. In the Service Schedule below, items that should be checked, replaced
or adjusted are indicated by " ○" in the appropriate column. Not all

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Walk-behind Power Trowel models include the same features and
options and as such not all service operations may have to be
performed. For ease of recording place a checkmark (√) through the "○
" when the item is complete. If an item is not required or not complete
place an "×" through the "○" in the box.
CATIONS！Over time, if the blades will have 3/4 worn and torn, you must
change new trowel blades.
MAINTENANCE SCHEDULE
Routine Service
Intervals
Eac
h
use
After
1.5
mont
hs or
50hrs
Each
3
mont
hs or
100h
rs
Each
6
mont
hs or
200h
rs
Each
9
mont
hs or
300h
rs
Each
12
mont
hs or
400h
rs
General Inspection:
Guards
Check
○
○
○
○
○
Warning
stickers
Check
○
○
○
○
○
Test run
Check
operation
○
○
○
○
○
Controls:
Dead-man
switch
operation
Check
○
○
○
○
○
○
Pitch control
assembly
Check
○
○
○
○
○
○
Lubricat
e
○
○
○
○
○
Engine:
Engine oil
check
○
○
○
○
○
○

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level
Change
○
○
○
Engine oil
filter
Replace
○
○
Oil cooler
Clean
○
○
○
○
Cooling
Fins
Clean
○
○
○
○
○
Air
cleaner
Check-cle
an
○
○
○
○
○
○
Replace
○
Air Intake
Line
Check
○
Replace
2 yrs
Fan Belt
Check
tightness
○
○
Replace
500
hrs
Valve
clearance
Check-adj
ust
○
○
Fuel filter
Check &
Clean
○
○
○
○
Replace
○
○
Fuel Tank
Clean
500h
rs
Engine
wiring
Check
○
Drive Train:
Clutch/Pu
lley
operation
Check
○
○
○
○
○
○

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Spider
plate
assembly
Check
○
○
○
○
○
○
Lubricate
○
○
V-Belt
Check
○
○
○
○
○
○
Blades
Check
○
○
○
○
○
○
Gearbox:
Gearbox
oil
Check
level
○
○
Check
○
○
○
Gearbox
breathers
Check
operation
○
○
○
○
OPERATION ELEMENTS
V-belt is driven gearbox by engine, and then transmit torque to trowel
and the machine working. The trowels can be adjusted due to the stature of
operator through pitch control assembly. Dead man switch designs provide
safe and stable operation. Holding the deadman lever before start the
engine, and loosening deadman lever the machine will stop working.
OPERATION (Floating)
When the slab has set sufficiently firm that the operator's footprint
leaves a very slight depression on the surface of the slab, it is ready for the
floating operation.
Guiding the machine on the slab is very simple; a slight upward lift of the
handle causes the machine to travel to the left. Holding the handle in the
neutral position, will slowly cause the machine to spin in one spot. Slight
downward pressure on the handle cause the machine to the travel to the
right. Best results are obtained by covering approximately 4" on each turn.

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In other words, let the machine move right or left, backwards or forwards,
approximately 4" with each revolution of the trowels. To fill a hole or cut
down hump, move the unit back and forth over the problem area.
Under normal operating conditions the machine should cover as much as
1000 sq. ft. in about 15 minutes. It is recommended that a slight tension on
the trowel control cable, (but not a definite tilt), during the floating operation
will cause the machine to operate much smoother. After the floated slab
has set sufficiently, it is ready for the finishing operation.
CAUTION! Do not let the machine stand in one spot on the soft cement. Lift
from the slab when the floating operation is complete.
OPERATION (Finishing)
When starting the finishing operation, never set the trowels up over 1/4"
pitch.
After the floating operation, the first thing to do is to remove the floating disc
from the blades. Clean the blades, spider plate and disc from cement paste
collected during the floating operation. Increase the blade pitch up to a
maximum of 1 cm for the first finishing operation and then continue to
increase the pitch on the following finishing operations. Continue the
finishing passes until you obtain the desired floor finish. The time required
between each finishing pass is again dependent on the weather conditions
and water content of the concrete etc. If some areas of the concrete
set/harden too fast you may apply a small amount of water using a hand
brush as an aid to achieving the finish.
STARTING ＆STOPPING PROCEDURE
1. Before operation checks
a. Check the oil level: Before beginning your preoperational checks, be
sure the engine is level and the engine switch is in the OFF.

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Remove the filler cap/dipstick and wipe it clean. Insert and remove
the dipstick without screwing it into the filler hole. Check the oil level
shown on the dipstick. If the oil level is low, remove the oil filler cap,
and fill to the upper limit mark on the dipstick with recommended oil.
Screw in the filler cap/dipstick securely.
SAE 10W-30 is recommended for general use. The engine is
certified to operate on unleaded gasoline with a research octane
rating of 90 or higher. Unleaded gasoline produces fewer engine
and spark plug deposits and extends exhaust system life. Never use
stale or contaminated gasoline or an oil/gasoline mixture. Avoid
getting dirt or water in the fuel tank.
b. Check air filter: Remove the air cleaner cover and inspect the filter.
Clean or replace dirty filter elements. Always replace damaged filter
elements. If equipped with an oil-bath air cleaner, also check the oil
level.
Notice! Running the engine with a low oil level can cause engine
damage.
2. Start engine/Stopping engine procedure
a. Move the fuel valve lever to the ON position.
b. Move the choke lever to the CLOSE position. If the engine is warm or
the air temperature is high, move the control lever away from the
OPEN position as soon as the engine starts.

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c. Move the throttle lever away from the SLOW position, about 1/3 of the
way to toward the FAST position.
d. Turn the engine switch to the ON position.
e. Pull the starter grip lightly until you feel resistance, then pull briskly.
Return the starter grip gently.
CAUTION! Do not allow the starter grip to snap back against the engine.
Return it gently to prevent damage to the starter.

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3. Stopping the engine
a. Move the throttle lever to the SLOW position.
b. Turn the engine switch to the OFF position.
c. Turn the fuel valve lever to the OFF position.
4. Setting engine speed
Position the throttle lever the desired engine speed.

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LUBRICATION
1. Engine oil lever check
Check the engine oil level with the engine stopped and in a level position.
1. Remove the filler cap/dipstick and wipe it clean.
2. Insert and remove the dipstick without screwing it into the filler neck.
Check the oil level shown on the dipstick.
3. If the oil level is low, fill to the edge of the oil filler hole with the
recommended oil.
4. Screw in the filler cap/dipstick securely.
2. Engine oil change
Drain the used oil while the engine is warm. Warm oil drains quickly and
completely.
1. Place a suitable container below the engine to catch the used oil, then
remove the filler cap/dipstick, drain plug, and washer.
2. Allow the used oil to drain completely, then reinstall the drain plug,
washer, and tighten drain plug securely.
Notice! Please dispose of used motor oil in a manner that is compatible
with the environment. We suggest you take used oil in a sealed container to
your local recycling center or service station for reclamation. Do not throw it
in the trash; pour it on the ground, or down a drain.

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3. With the engine in a level position, fill to the outer edge of the oil filler
hole with the recommended oil.
Notice! Running the engine in a low oil level can cause engine damage.
4. Screw in the filler cap/dipstick securely.
SPARK PLUGS
Recommended spark plugs: BPR6ES (NGK) W20EP-U W20EPR-U (ND)
For good performance, the spark plug must be properly gapped and free
of deposits.
Notice! An incorrect spark plug can cause engine damage.
1. Disconnect the spark plug cap, and remove any dirt from around the
spark plug area.
2. Remove the spark plug with a 13/16-inch spark plug wrench.
3. Inspect the spark plug. Replace it if the electrodes are worn heavy
carbon buildup is found, or if the insulator is cracked or chipped.
4. Measure the spark plug electrode gap with a suitable gauge. The gap
should be 0.028-0.031 in (0.70 - 0.80 mm). Correct the gap, if necessary,
by carefully bending the side electrode.
5. Check that the spark plug washer is in good condition. Install the spark
plug carefully, by hand, to avoid cross-threading.
6. After the spark plug seats, tighten with a 13/16-inch spark plug wrench
to compress the sealing washer.
7. When installing a new spark plug, tighten 1/2 turn after the spark plug

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seats to compress the washer.
8. After the spark plug seats, tighten with a 13/16-inch spark plug wrench
to compress the sealing washer. If reinstalling the used spark plug, tighten
1/8 - 1/4 turn after the spark plug seats. If installing a new spark plug,
tighten 1/2 turn after the spark plug seats.
9. Attach the spark plug cap.
NOTICE! The recommended spark plug has the correct heat range for
normal engine operating temperatures. A loose spark plug can overheat
and damage the engine. Over tightening the spark plug can damage the
threads in the cylinder head.
CARBURETTOR ADJUSTMENT
1. Start the engine outdoors, and allow it to warm up to operating
temperature.
2. Move the throttle lever to its slowest position.
3. Turn the throttle stop screw to obtain the standard idle speed.
Standard idle speed: 1440r/min
AIR FILTER SERVICE
A dirty air filter will restrict air flow to the carburetor, reducing engine
performance. If you operate the engine in very dust areas, clean the air

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filter more often than specified in the MAINTENANCE SCHEDULE.
WARNING! Never use gasoline or low flammable point solvents for
cleaning the air cleaner element. A fire or explosion could result.
NOTICE! Operating the engine without an air filter element, or with a
damaged air filter element, will allow dirt to enter the engine, causing rapid
engine wear.
1. Remove the wing nut from the air cleaner cover, and remove the cover.
2. Remove the wing nut from the air filter, and remove the filter.
3. Remove the foam air filter element from the paper filter.
4. Inspect both air filter elements, and replace them if they are damage.
5. Paper air filter element: Tap the filter element lightly several times on a
hard surface to remove excess dirt, or blow compressed air through the
filter element from the inside out. Never try to brush the dirt off; brushing will
force dirt into the fibers.
6. Foam air filter element: Clean in warm soapy water, rinse, and allow to
drying thoroughly. Or clean in nonflammable solvent and allow to drying.
Dip the filter element in clean engine oil, and then squeeze out all excess
oil. The engine will smoke when started if too much oil is left in the foam.
STORAGE
The following steps should be taken to prepare your Walk-behind Power
Trowel for extended storage.
1. Close fuel shut off valve.
2. Siphon excess gasoline from tank.
3. Start engine until it stops from lack of fuel. This will use up all the fuel
in the carburetor and prevent formation of deposits due to evaporation of
fuel.
4. Remove spark plug and pour 2 oz. of SAE-30 or SAE-40 motor oil into
the cylinder. Slowly crank the engine 2 or 3 times to distribute the oil

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throughout the cylinder. This will help prevent rust during storage. Replace
spark plug.
5. Store the unit in an upright position in a cool, dry, well ventilated area.
TROUBLESHOOTING
1. WON'T START
※Throttle fully open
※Hand lever wire broken
※No gas
※Dirty gas
※No oil
※Gas filter plugged
※Gas line plugged
※Hole in gas line
※Gas supply valve turned off
※Dead-man safety switch is off
※Safety switch wire or connectors not making good contact
※Other engine problems (Refer to engine manual)
2. STARTS BUT NO HIGH SPEED
※Engine problems
※Throttle cable broken or seized
※Throttle lever and connectors loose or out of adjustment
※Clutch shoes worn
3. STARTS AT HIGH SPEED, WON'T SLOW DOWN
※Same as above
4. ENGINE WON'T STOP
※Safety switch, wire or connectors not making good contact
※Micro-switch burnt out
5. ENGINE STARTS BUT WON'T TURN TROWELS AT ANY SPEED

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※Clutch seized
※No weights in clutch
※Wrong belt
※Broken or missing key
— Clutch seized
— Pulley
— Worm gear (countershaft)
— Main gear
— Spider plate
※Gearbox seized
6. TROWELS TURN, ENGINE AT IDLE
※Idle too fast
※Belt too tight
※Clutch seized
※Pulley out of alignment
7. TROWELS BLADES WEARING UNEVENLY
※Spider plate seized
※Arms bent
※Adjusting screws (carriage bolts) incorrectly set
※Floating disc not evenly attached to the blades
8. MACHINE JUMPS ON FLOOR
※Concrete hardened on bottom of spider plate
※Trowels unevenly worn/bent
※Spider plate seized
※Spider plate loose
※Trowel arms bent
※Adjusting screws (carriage bolts) incorrectly set
※Main shaft bent
9. PITCH CONTROLS WILL NOT OPERATE BLADES

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※Cable broken or out of adjustment
※Pressure plate assembly contaminated with concrete debris
※Slot screw missing (under-side of handle)
※Spider plate seized
※Pressure plate and/or yoke arm broken or badly worn
※Hand crank adjuster malfunctioning
10. BELT WEARING RAPIDLY
※Belt is too tight
※Pulley out of alignment
※Wrong belt/defective belt
※Clutch sticking
※Gearbox seizing
11. OIL LEAKS
a. Top of gearbox
※Gearbox seal warn
※Engine leaks
※Too much oil in gearbox
b. At main shaft or countershaft
※Shaft and/or seal worn
※Retaining screw(s) loose
12. TROWEL BLADES WILL NOT TURN
※Yoke arm broken
※Key sheared
※Gearbox malfunction

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Diagram
1. Walk-behind power trowel assembly
Item
Part No.
Part name
Qty