Global Machinery Company Lawn Mower RL504 User Manual

4HP  
PETROL  
LAWN MOWER  
RL504  
INSTRUCTION MANUAL  
Code: RL504 IM  
Date: 070421  
Black  
Cyan  
Magenta  
Yellow  
Edition: 13  
Op: GM  
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Introduction  
Description of symbols  
Your new GMC power tool will more than satisfy  
your expectations. It has been manufactured under  
stringent GMC Quality Standards to meet superior  
performance criteria.  
The rating plate on your tool may show symbols.  
These represent important information about the  
product or instructions on its use.  
Conforms to relevant standards  
for electromagnetic compatibility.  
You will find your new tool easy and safe to operate,  
and, with proper care, it will give you many years  
of dependable service.  
Wear hearing protection.  
Wear eye protection.  
Wear breathing protection.  
CAUTION. Carefully read through this entire Instruction  
Manual before using your new GMC Power Tool. Take  
special care to heed the Cautions and Warnings.  
Wear safety footwear.  
Wear safety gloves.  
Your GMC power tool has many features that will make  
your job faster and easier. Safety, performance, and  
dependability have been given top priority in the  
development of this tool, making it easy to maintain  
and operate.  
Warning.  
Read these instructions for use carefully.  
Environmental protection  
Recycle unwanted materials instead  
of disposing of them as waste. All tools,  
hoses and packaging should be sorted,  
taken to the local recycling centre and  
disposed of in an environmentally safe way.  
Use at a distance of at least 15m  
from other people.  
Thrown objects and rotating blades  
can cause severe injury.  
Noise label rating 75dBA  
(taken at 7.5 meters) you must wear  
Explosive material.  
 
ear protection at all times.  
 
Extremely hot surface. Do not touch a hot muffler,  
gear box or cylinder, you may get burned. These  
parts get extremely hot from operation and remain  
hot for a short time after the unit is turned off.  
Caution before carrying out any operation stop the  
engine and disconnect the spark plug cap.  
Caution. Risk of hand and feet injuries  
3
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Preparation  
Specifications  
Engine:  
While mowing, always wear sturdy footwear and long  
trousers. Do not operate the equipment when barefoot  
or wearing open sandals.  
Briggs & Stratton 4HP, 4 Stroke  
0 – 3000min-1  
Speed:  
Thoroughly inspect the area where the equipment is to be  
used and remove all objects which may be thrown by the  
machine or damage the cutter assembly and the engine  
(stones, sticks, metal wire, bones, etc.)  
Width of cut:  
Blades:  
18" 460mm  
4 Swing back  
Height adjustment:  
10 Levels, 15 – 70mm  
WARNING: DANGER! Engine fuel is highly flammable:  
Grass catcher capacity: 55L  
Equivalent Spark plugs: CHAMPION RJ19LM  
DENSO W9LMR-US  
– Store fuel in containers specifically designed for this purpose.  
– Refuel using a funnel and outdoors only. Do not smoke  
while refuelling or whenever handling the fuel.  
– Add fuel before starting the engine. Never remove the cap  
of the fuel tank or add fuel while the engine is running or  
when the engine is hot.  
NGK BR2LM  
Weight:  
32.5kg  
– If fuel is spilled, do not attempt to start the engine but  
move the machine away from the area of spillage and  
avoid creating any source of ignition until the fuel has  
evaporated and the vapour dispersed.  
Noise label rating 75dBA (taken at 7.5 meters) you must wear ear  
protection at all times.  
Safety rules for petrol lawn mowers  
Training  
– Replace all fuel tanks and containers caps securely.  
Substitute faulty silencers.  
Read the instructions carefully. Get familiar with the  
controls and proper use of the equipment.  
Before use, always inspect the machine, especially the  
condition of the blades, and check that the screws and  
cutting assembly are not worn or damaged. Replace worn or  
damaged blades and screws in sets to preserve balance.  
Only use the lawn mower for the purpose for which it was  
designed, i.e. for cutting and collecting grass. Any other  
use can be hazardous, causing damage to the machine.  
Never allow children or people unfamiliar with these  
instructions to use the lawn mower. Local regulations may  
restrict the age of the operator.  
Discharge openings must be guarded at all times. Do not  
remove the discharge guard or hold it up while mowing.  
It is advisable to wear suitable eye protection when  
operating the mower.  
Never use the lawn mower:  
– When people, especially children, or pets are nearby.  
Operation  
– If the operator has taken medicine or substances that  
can affect his ability to react and concentrate.  
Do not operate the engine in a confined space where  
dangerous carbon monoxide fumes can collect.  
Remember that the operator or user is responsible  
for accidents or hazards occurring to other people  
or their property.  
Mow only in daylight or good artificial light.  
If possible, avoid operating the equipment in wet grass.  
Always be sure of your footing on slopes.  
4
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Walk, never run and do not allow yourself to be pulled  
along by the lawn mower.  
– If the lawn mower starts to vibrate abnormally (find and  
remove the cause of the vibration immediately).  
Mow across the face of slopes, never up and down.  
Exercise extreme caution when changing direction on slopes.  
Do not mow on slopes of more than 20°.  
Stop the engine:  
– Whenever you leave the lawn mower unattended.  
Remove the key from models with electric starters.  
– Before refuelling.  
Exercise extreme caution when pulling the lawn-mower  
towards you.  
– Every time you remove or replace the grass-catcher.  
Stop the blade if the lawn mower has to be tilted for  
transportation when crossing surfaces other than grass,  
and when transporting the lawn mower to and from the  
area to be mowed.  
Reduce the throttle before turning off the engine and turn  
the fuel off when you have finished mowing, following the  
instructions in the engine handbook.  
When mowing, always keep to a safe distance from the  
rotating blade. This distance is the length of the handle.  
Never operate the lawn mower with defective guards, or  
without safety devices, such as the stoneguard and/or  
grass-catcher, in place.  
Never cut grass while walking backwards.  
Stop the engine before pushing mower across gravel  
drives, walks or roads.  
Do not change the engine governor settings or over  
speed the engine.  
Maintenance and storage  
On power-driven models, disengage the drive clutch  
before starting the engine.  
Keep all nuts, bolts and screws tight to be sure the  
equipment is in safe working condition. Regular  
maintenance is essential for safety and performance.  
Start the engine carefully, following the instructions and  
keeping feet well away from the blade.  
Never store the equipment with fuel in the tank inside a  
building where vapour may reach a flame or a spark or a  
source of extreme heat.  
Do not tilt the lawn mower when starting the engine.  
Start the engine on a flat surface that is free of obstacles  
and tall grass.  
Allow the engine to cool before storing in an enclosed  
space.  
Do not put hands or feet near or under rotating parts.  
Keep clear of the discharge opening at all times.  
To reduce the fire hazard, keep the engine, exhaust  
silencer, battery compartment and fuel storage area  
free of grass, leaves, or excessive grease. Do not leave  
containers with grass cuttings in rooms.  
Never pick up or carry a lawn mower while the engine  
is running.  
Stop the engine and disconnect the spark plug wire:  
– Before carrying out any work underneath the cutting deck  
or before unclogging the chute;  
Check the stone-guard and grass-catcher frequently for  
wear and deterioration.  
– Before checking, cleaning or working on lawn mower;  
If the fuel tank has to be drained, this should be done  
outdoors and when the engine is cool.  
– After striking a foreign object. Inspect the lawn mower for  
damage and make repairs before restarting and operating  
the lawn mower;  
Wear strong work gloves when removing and  
reassembling the blade.  
5
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Check the blade’s balance after sharpening.  
For reasons of safety, do not use the equipment with  
worn or damaged parts. Parts are to be replaced and  
not repaired. Parts that are not of the same quality can  
damage the equipment and be dangerous for your safety.  
Whenever the machine is to be handled, transported or  
tilted you must:  
– wear strong working gloves;  
– grasp the machine at the points that offer a safe grip,  
taking account of the weight and its distribution.  
Damaged blades and worn bolts are major hazards.  
Unpacking  
Due to modern mass production techniques, it is unlikely  
that your GMC Power Tool is faulty or that a part is missing.  
If you find anything wrong, do not operate the tool until the  
parts have been replaced or the fault has been rectified.  
Failure to do so could result in serious personal injury.  
Contents of carton  
Handle bar locking knobs, with bolts and washers x2  
Catcher  
6
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1
Know your product  
1. Handle bar  
14  
8. Oil filler cap  
2. Lower handle  
9. Recoil starter  
10. Spark plug cap  
11. Air filter  
3. Throttle Lever  
4. Discharge guard  
5. Grass catcher  
12. Primer bulb  
3
2
6. Height adjustment lever  
7. Fuel tank cap  
13. Handle bar locking knob  
14. Brake Lever  
13  
5
4
8
9
6
11  
10  
7
12  
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Assembly  
Attaching the Handles  
It is necessary to fit the lower handle (2), handle bar (1),  
and catcher (5) to the mower.  
It is necessary to attach both the lower handle and  
handle bars.  
Assembling the catcher  
1. To attach the lower handle,  
first use a spanner to  
remove the 4 bolts.  
1. The grass catcher (5) is supplied  
in two sections. Locate the top  
half on top of the bottom half  
and interlock them together by  
aligning the lugs and slots and  
pushing the halves together until  
they click into place.  
2. Place the lower handle in  
position and replace the 4 bolts.  
Use the spanner to retighten  
the nuts.  
3. To attach the handle bar,  
first remove the two handle  
bar locking knobs (13).  
Attaching the catcher  
1. Lift the discharge guard (4) in  
order to position the catcher.  
1
2. While lifting the discharge  
guard, slide the catcher  
into position in adownwards  
direction (Fig. 1).  
3. Push the catcher down until it  
locks into place (Fig. 2).  
4. Release the discharge guard to secure the catcher in  
place between the 2 ribbed locking notches (Fig. 3).  
4. Position the handle bar over the lower handle  
and insert the two locking knobs, and tighten  
to secure the handles together.  
Note. Always empty the catcher before it has reached maximum  
2
3
Cutting height adjustment  
The GMC mower has one lever to easily adjust the  
cutting height.  
There are 10 height settings.  
1. To decrease the cutting height  
pull the height adjustment  
lever (6) out and move it up a  
notch, towards the handlebar.  
capacity, otherwise it will decrease the performance of the mower.  
2. To increase the cutting height  
pull the lever out and move it  
down a notch, towards  
the motor.  
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filled with the right amount of correct grade oil. Refer to  
the oil recommendations section of the Briggs & Stratton  
instruction manual for this information.  
Note. If you are unsure of which cutting height to use, begin  
with a high setting and trial a small section of lawn, then  
check the appearance of the lawn. Then readjust if necessary  
1. Move the lawn mower to a  
level surface and clean around  
the oil filter cap (8) .  
Brake lever  
The mower is equip with a brake  
lever (14) to improve the safety of  
the mower.  
During operation the brake lever  
must be held, if it is let go the  
engine will automatically stop.  
To start the lawn mower you  
must hold the brake lever to the  
handle bar.  
2. Remove the oil filter cap with  
dipstick and wipe it with a  
clean cloth. Replace it and  
retighten the cap.  
3. Remove the dipstick again and  
check the oil level, the oil should  
be at the full mark.  
4. If oil is required add it slowly  
(the oil capacity is about  
0.6 litre), do not over fill.  
Fuelling  
Note. Use fresh unleaded petrol.  
1. Unscrew the fuel tank cap (7)  
and pour the unleaded petrol  
into the tank with the aid of  
a funnel.  
5. Retighten the oil filter cap firmly  
before starting the engine.  
Starting the engine  
Note. Before starting the mower  
check the oil and fuel levels.  
2. Fill the tank to approximately  
2.5 cm below the lowest  
portion of the neck to allow for  
fuel expansion.  
K
Cold  
Start  
1. Move the  
throttle lever (3)  
to the cold start  
position.  
Cold Start  
Run  
Be careful not to over fill.  
3. Be careful not to spill any petrol, if this happens, wipe the  
spill with a clean rag.  
2. Push the primer  
bulb firmly  
Hot  
Start  
4. Start the engine at least three meters away from the area  
where the fuel tank has been filled in order to avoid the  
risk of fire.  
5 times (for  
initial starting)  
or 3 times (for  
engine starting  
thereafter).  
L
WARNING. Never attempt to refuel the engine while it is  
running or still warm, allow it to cool before fuelling.  
Note. For further information refer to the Fuel  
Recommendations section in the Briggs & Stratton  
instruction manual.  
3. Disengage the brake by  
pulling the brake lever (14)  
toward the handle. Letting  
go of the lever will prevent  
the mower from starting or  
Checking the oil  
CAUTION. The lawn mower is shipped without oil. Do  
not start your lawn mower before ensuring it has been  
will stop the engine, if running.  
9
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2. Sharp blades cut cleanly and efficiently, if the blade is dull  
it will tear the grass. This will result in the ends turning  
brown. When the blades no longer cut cleanly either  
sharpen them or replace them.  
3. To safely operate the mower ensure all four wheels are  
on the ground and be careful not to loose your footing  
or control of the mower. Be very careful when mowing  
uneven or rough ground. Keep a firm grip on the handle  
bar at all times, always walk, never run with the mower.  
4. While holding the brake lever inward pull the recoil starter  
(9) lightly until you feel resistance then pull quickly until  
the engine starts. Do not pull the cord with a jerk or  
release it until fully rewound.  
4. For healthy growth, grass should not be cut too short.  
This can cause damage to the grass and allow weeds  
to develop.  
5. Vary your cutting pattern from week to week, this will  
help to prevent matting and graining of the grass.  
5. Once the lawn mower has started and warmed up move  
the throttle lever to the Run position while continuing to  
hold the brake lever.  
6. Before checking a clogged mower deck stop the engine  
completely and disconnect the spark plug lead and then  
tilt the mower so the air filter side is facing upwards.  
Use a stick the clear any clogged material, never use  
your hands.  
Stopping the engine  
To stop the engine reduce the speed of the engine by  
pulling the throttle lever (3) towards the tortoise and  
release the brake lever (14). In an emergency just release  
the brake lever.  
7. Mowing wet grass should be avoided. Wet grass will  
clog the mower deck and if it is slippery you may loose  
your footing.  
Cold Start  
8. Always mow across slopes not up and down them.  
Be extra careful if the grass is wet as this could cause  
you to slip and loose control of the mower.  
Run  
9. If the ground is to dry, mowing will stir up a lot of dust  
which may clog the air filter. In these conditions it is  
recommended to water your lawn the day before mowing.  
Hot  
Start  
10. Use the side of the mower as a guide to cut close to  
large objects such as a fence or a wall. Be careful when  
mowing over obstacles embedded in the lawn such as  
sprinkler systems and paving, avoid anything that sticks  
up above the surface of the lawn.  
Mowing advice  
1. It is recommended to use the fast throttle setting and  
keep the engine running at maximum speed. This will  
deliver the best cut. If the speed of the engine slows this  
could indicate the mower is being overloaded, by trying to  
cut to much grass. Try mowing a narrower strip, mowing  
slower or raise the cutting height.  
11. Avoid mowing over loose stones, gravel and other  
landscaping material as this can be picked up by the  
mower and flung out causing serious personal injury.  
10  
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12. If the blades do come into contact with something or the  
mower starts to vibrate stop the engine immediately,  
remove the spark plug lead and inspect to see if there  
is any damage.  
5. Replace all 4 blades to  
ensure a smooth even cut.  
By replacing the washer, then  
the half washer, then the nut  
securing the blade firmly,  
(25 – 30Nm) repeat this for  
the other 3 blades.  
Emptying the grass catcher  
Note. Before making any adjustment or maintenance  
procedures to the mower ensure it is turned off and the  
spark plug lead is removed.  
To remove the catcher, raise the guard while lifting the  
catcher to dislodge it from the hooks.  
6. Replace the blade disc and  
retighten the central blade bolt  
tightly (50 – 59Nm).  
Note. Use a wooden block to stop the blade from turning.  
The 4 blades should be tightened fully but check to ensure  
they can still swing back if they were to hit a solid object.  
WARNING. Check the catcher frequently for cracks and  
wear and replace it if damaged.  
Do not leave clippings in the catcher for extended periods.  
Where required tighten the bolts with a torque wrench,  
the centre disc blade bolt torque: 50 – 59Nm and the four  
blades torque: 25 – 30Nm.  
Replacing the blades  
Note. Before making any adjustment or maintenance  
procedures to the mower ensure it is turned off and the  
spark plug lead is removed.  
If you do not have a torque wrench ask a mower service  
dealer to tighten the blade bolts before you use the mower.  
WARNING. If the blade bolts are not tightened correctly  
they could loosen and/or come out and it would be possible  
for the blades to fly off while you are operating the mower.  
Note. Wear heavy gloves to protect your hands.  
1. Tilt the mower back so the spark plug is facing up.  
2. Remove the blade disc with a spanner to remove the  
central blade bolt first.  
Maintenance  
For all maintenance information refer to the Briggs &  
Stratton instruction manual.  
3. Remove all 4 single blades including the washer  
and nuts.  
4. Clean dirt and grass from around the blade mounting area.  
11  
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GMC customer assist  
If your product needs repairing, replacing,  
technical service or you simply need help or advice,  
please contact us on our Customer Assist Line  
1300 880 001 (Australia) or 0800 445 721 (New Zealand).  
For prompt service we suggest you log your service request  
online at www.gmcservice.com.au. Should you not have  
access to the Internet, please contact our service department  
on 1300 880 001 (Australia) or 0800 445 721 (New Zealand).  
7am 7pm, 7days a week (AEST).  
Please note that if repair or replacement is required,  
you must provide a valid original purchase receipt.  
You will need the following details at hand to log your service request;  
Personal details: First & Last name, address, pick up address,  
contact phone numbers, email address  
Product details: Product number, date of purchase, retailer bought from,  
State & postcode, receipt number, reason for the request,  
copy of official purchase receipt  
Attach your purchase receipt and save with this Manual for future reference.  
Please refer to our website www.gmcompany.com for full GMC warranty Terms and Conditions.  
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