Spark plugs…………………………………………….13
Carburetor adjustment……………………………..…14
Air filter service………………………………………..15
Storage…………………………………………………16
Troubleshooting…………………………………….…16
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
The KPT 36 and the KPT 48 Walk Behind Power Trowels can
be used in surface finishing of concrete road, terrace, boatyard,
airport and floor etc.
Deadman switch design pr ovide 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 ro tation.
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 saf e and stable operation.
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 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!
9. Over time, the blades will form a sharp edge. Be careful when handling the old blades.
10. Gasoline is extremely flammable, and gasoline vapor can explode. Refuel outdoors, in a well-ventilated area, and keep
other flames and sparks away.
11. Do not fill the fuel tank completely. After refueling, tighten the fuel tank cap securely.
12. 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.
13. Don’t allow children to operate the engine. Keep children and pets away from the area of operation.
14. After each use your machine should be cleaned to remove any dust and debris from the undercarriage and
surrounding components.
15. 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.
16. 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 "o" in the
column. Not all 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 "o" when the item is
complete. If an item is not required or not complete place an "×" through the "x" in the box.
CAUTIONS! Over time, if the blades will have 3/4 worn and torn, you must change new trowel blades.
appropriate
Routine
Service Intervals
Each use
After 1.5
Months
or 50 hrs
Each 3
Months
or 100 hrs
Each 6
Months
or 200 hrs
Each 9
Months
or 300 hrs
Each 12
Months
or 400 hrs
General Inspection:
Guards
Check
O O O O O
Warning
Stickers
Check
O O O O O
Test Run
Check Operation
O O O O
Controls:
Dead-Man
Switch Operation
Check O O O O O O
Pitch
Control Assembly
Check O O O O O O
Lubricate
O O O O O
Engine:
Engine oil
Check level
O O O O O O
Change
O
O
O
Engine Oil
Filter
Replace
O
O
Oil Cooler
Clean
O O O O
Cooling Fins
Clean
O O O O O
Air cleaner
Check-clean
O O O O O
Replace
O
Air Intake Line
Check O
Replace
2 yrs
Fan Belt
Check tightness
O
O
Valve Clearance
Replace
500 hrs
Check-Adjust
O O
Fuel filter
Check & Clean
O O O O
Replace
O O
Fuel Tank
Engine wiring
Clean
500hrs
Check
O
Drive Train:
Clutch/Pulley
Operation
CheckO O O O O O
Spider plate assembly
CheckO O O O O O
Lubricate
O O
V-Belt CheckO O O O O O
Blades CheckO O O O O O
Gearbox:
Gearbox oil
Check level
O O
CheckO O O
Gearbox
Breathers
Check Operation
O
O O O
MAINTENANCE SCHEDULE
OPERATION ELEMENTS
V-
belt is driven gearbox by engine, and then transmit torque to trowel and the machine working. The trowels can be
4
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 causes the machine to the travel to the right. Best results are obtained by covering
approximately 4” on each turn. 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!
operation is complete.
Do not let the machine stand in one spot on the soft cement. Lift from the slab when the floating
Model350WSB&350WSBWithStandPartsList
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. 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
Move the fuel valve lever to the ON position.
a.
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.
5
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.
6
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.
3. Stopping the engine
a.
Move the throttle lever to the SLOW position.
f. If the chock lever or chock rod (applicable types) has been
moved to the CLOSED position to start the engine,
gradually move it to the OPEN position as the engine warms
up.
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.
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, and 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.
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). 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 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 overh eat and damage the engine. Over tightening the spark plug can damage the threads in the cylinder
head.
CARBURETOR AD J U S TM E N T
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
7
8
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 filter more often than specified in the MAINTENANCE SCHEDULE.
WARNING!
could result.
NOTICE!
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.
Never use gasoline or low flammable point solvents for cleaning the air cleaner element. A fire or explosion
Operating the engine without an air filter element, or with a damaged air filter element, will allow dirt to
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 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
2. STARTS BUT NO HIGH SPEED
• Engine problems • Throttle lever and connectors loose or out of adjustment
• Throttle cable broken or seized • 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