Global Machinery Company Chainsaw PCH37 User Manual

PET
PCH37  
INSTRUCTION MANUAL  
Code: PCH37  
Date: 060426  
Black  
Cyan  
Magenta  
Yellow  
Edition: 04  
Op: DCR  
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Dear Customer  
Description of symbols  
If you require any help with your product, whether it  
is a Warranty claim, spare part or user information,  
please phone our Help Line for an immediate response.  
Phone 1300 880 001 in Australia or  
The rating plate on your tool may show symbols.  
These represent important information about the  
product or instructions on its use.  
Conforms to relevant safety standards.  
0800 445 721 in New Zealand.  
Wear hearing protection.  
Wear eye protection.  
Wear head protection.  
Introduction  
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.  
Read these instructions for use carefully.  
Wear safety footwear.  
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 safety gloves.  
Warning.  
CAUTION. Carefully read through this entire Instruction  
Manual before using your new GMC Power Tool. Take  
special care to heed the Cautions and Warnings.  
Use at a distance of at least 10m  
from other people.  
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.  
Explosive material.  
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.  
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.  
WARNING! Danger of kickback.  
Do not operate unit in the rain.  
Do not attempt to hold saw with one hand.  
Do not use the point of the bar.  
Hold saw properly with both hands.  
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Symbols on the machine  
Specifications  
Fuel inlet.  
(Position: under the fuel tank cap.)  
Engine displacement:  
Maximum engine power:  
Engine type:  
37cc  
1200W  
Chain oil inlet.  
(Position: next to the oil tank cap.)  
Air cooled, single  
cylinder, two-stroke cycle  
On/Off.  
(Position: on the on/off switch.)  
Recommended maximum  
engine speed at idling:  
Setting the on/off switch to Off, stops the engine  
immediately.  
2600min-1  
9000min-1  
Maximum engine speed  
with cutting attachment:  
Run position.  
Start position (when engine is warm.)  
Start position (when engine is cold.)  
Fuel type:  
Unleaded petrol/  
2-stroke oil (50/1)  
Fuel tank capacity:  
Oil tank capacity:  
Spark plug:  
310ml  
210ml  
Choke control  
(Position: next to knob on the top cover)  
LD L8RTF NGK BM6A  
Champion CJ8  
High run adjustment screw.  
Low run adjustment screw.  
Oil feeding system:  
Sprocket wheel:  
Automatic pump  
Idle adjustment screw.  
(Position: left side of machine close to  
pull start handle.)  
6–teeth x 9.53mm  
(3/8”) pitch  
Guide bar type:  
Guide bar cut length:  
Chain type:  
Sprocket nose  
405mm (16”)  
Oregon 91VG  
9.53mm (3/8”)  
Chain brake released (hollow arrow) and  
activated (solid arrow.) (Position: right side  
of machine, on chain drive cover.)  
Chain pitch:  
Weight (including  
guide bar and chain):  
5.2kg  
Sound pressure level:  
93.4 dB(A)  
4
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f) If devices are provided for the connection of dust  
extraction and collection facilities ensure that these  
are connected and properly used. Use of these  
devices can reduce dust-related hazards.  
General safety instructions  
WARNING. Read and understand all instructions.  
Failure to follow all instructions listed below may result  
in fire and/or serious injury.  
Save these instructions  
1) Work area  
3) Power tool use and care  
a) Do not force the power tool. Use the correct power  
tool for your application. The correct power tool will  
do the job better and safer at the rate for which it was  
designed.  
a) Keep work area clean and well lit. Cluttered and dark  
areas invite accidents.  
b)Do not operate power tools in explosive  
atmospheres, such as in the presence of flammable  
liquids, gases, or dust. Power tools create sparks which  
may ignite the dust or fumes.  
b)Do not use the power tool if the switch does not turn  
it on and off. Any power tool that cannot be controlled  
with the switch is dangerous and must be repaired.  
c) Turn tool off completely before making any  
adjustments, changing accessories, or storing power  
tools. Such preventive safety measures reduce the risk  
of starting the power tool accidentally.  
c) Keep children and bystanders away while operating a  
power tool. Distractions can cause you to lose control.  
2) Personal safety  
a) Stay alert, watch what you are doing and use  
common sense when operating a power tool. Do  
not use a power tool while you are tired or under the  
influence of drugs, alcohol, or medication. A moment  
of inattention while operating power tools may result in  
serious personal injury.  
d)Store idle power tools out of the reach of children  
and do not allow persons unfamiliar with the power  
tool or these instructions to operate the power tool.  
Power tools are dangerous in the hands of untrained  
users.  
e) Maintain power tools. Check for misalignment or  
binding of moving parts, breakage of parts and any  
other condition that may affect the power tool’s  
operation. If damaged, have the power tool repaired  
before use. Many accidents are caused by poorly  
maintained power tools.  
b)Use safety equipment. Always wear eye protection.  
Safety equipment such as a dust mask, non-skid  
safety shoes, hard hat, or hearing protection used for  
appropriate conditions will reduce personal injuries.  
c) Remove any adjusting key or wrench before turning  
the tool on. A wrench or a key that is left attached to  
a rotating part of the power tool may result in personal  
injury.  
f) Keep cutting tools sharp and clean.  
Properly maintained cutting tools with sharp cutting edges  
are less likely to bind and are easier to control.  
d)Do not overreach. Keep proper footing and balance  
at all times. This enables better control of the power tool  
in unexpected situations.  
g)Use the power tool, accessories and tool bits etc.,  
In accordance with these instructions and in the  
manner intended for the particular type of power  
tool, taking into account the working conditions  
and the work to be performed. Use of the power tool  
for operations different from intended could result in a  
hazardous situation.  
e) Dress properly. Do not wear loose clothing or  
jewellery. Keep your hair, clothing and gloves away from  
moving parts. Loose clothes, jewellery or long hair can be  
caught in moving parts.  
5
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During transport the brake must be applied to avoid  
accidental start-up.  
4) Service  
a) Have your power tool serviced by a qualified repair  
personnel using only identical replacement parts.  
This will ensure that the safety of the power tool is  
maintained.  
Do not use the chain saw in rainy or windy conditions or  
in poor light.  
Find a suitable position before beginning work.  
When working on slopes, the saw operator must stand  
beside or above the wood to cut, i.e. felled trees.  
Additional safety rules for petrol chain saws  
NOTE. For safety reasons the chain saw is shipped with  
the chain brake fully engaged. This brake must be released  
before the saw becomes operational.  
Use the chain saw holding it firmly with both hands.  
Make a wedge-shaped cut before felling the tree, then  
the felling cut leaving a hinge for the felling direction.  
Never cut into the ground.  
Beware of any falling branches after felling operations.  
Beware of wood splinters when cutting chopped wood.  
Ensure your chain saw is suitable for the job.  
Never cut into wire fences.  
Never cut into samplings.  
Never cut into prepared wood.  
Use the chain saw to cut only wood.  
Never work above shoulder level or reach out to cut a  
branch: ensure you have stable footing at all times.  
It is advisable to provide a support for the chain saw  
when cutting branches. Do not cut using the bar point  
and beware of branches under tension.  
Do not operate in a hazardous location. Such areas  
include where there is a risk of explosion of petrol fumes,  
leaking gas or explosive dust.  
Children under 18 must not use chain saws.  
Do not operate in a confined area. Exhaust gases, smoke  
or fumes could reach dangerous concentrations.  
Keep people away from the chain saw when in use.  
Check the following conditions before beginning work:  
– There should be no people in the felling area.  
– Make sure there is a second person within  
calling distance.  
Protect your tool. This chain is NOT WEATHERPROOF  
and should not be exposed to direct sunlight, high  
ambient temperature and damp, wet or high humidity  
conditions.  
– The working area should be free from obstacles.  
Take care not to spill fuel. When refuelling the chain saw  
ensure that the motor has been switched off. Prevent the  
spilling of fuel as this may also ignite with the hot motor.  
Never refuel whilst the engine running.  
Wear suitable clothes which do not hinder movement.  
Use specific protection during operations involving head,  
hands, feet, eyes and ears.  
Be careful where you store the chain saw. Store the tool  
in a dry area away from flammable liquids.  
It is recommended the use of a helmet with a visor during  
felling, branch cutting and chopping operations.  
Keep your distance. The chain saw emits exhaust fumes.  
Ensure bystanders keep a safe distance.  
Wear gloves with an external protection when using the  
chain saw.  
Operating instructions and instructions for common  
cutting tasks, including the use of personal protection  
equipment, the need for adequate training and the risks  
involved when operating the unit while tired, ill or under  
the influence of alcohol or other drugs.  
Use ear protection to prevent hearing injuries.  
Wear safety boots when using the chain saw.  
Use the bar cover when moving the chain saw away from  
the working site.  
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Ensure you use oil-mix fuel. Ensure that you mix 50 parts  
unleaded fuel to 1 part 2-stroke oil. If not, the engine will  
overheat and cause damage to your chain saw.  
DANGER!  
BEWARE OF KICKBACK!  
WARNING! Kickback can lead to dangerous loss of control  
of the chain saw and result in serious or fatal injury to the  
saw operator or to anyone standing close by. Always be  
alert. Rotational kickback and pinch kickback are major  
chain saw operational dangers and the leading cause of  
most accidents.  
Never fill fuel tank indoors. Never fill fuel tank when  
engine is running or hot. Do not smoke when filling  
fuel tank.  
Kickback safety precautions  
Kickback may occur when the tip of the guide bar  
touches an object, or when the wood closes in and  
pinches the saw chain.  
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.  
If the bar tip or point contacts, it can produce a rapid  
reverse reaction, kicking the guide bar up and back  
towards the operator. This is known as rotational  
kickback.  
Pinching the saw chain along the top of the guide  
bar may push the guide bar rapidly back towards the  
operator. This is known as pinch kickback.  
Contents of carton  
The GMC Petrol Chainsaw is supplied with the following  
accessories as standard.  
Either of these reactions can cause loss of control of the  
saw, resulting in serious personal injury.  
Chain  
Do not rely exclusively on the safety devices built into  
your saw. Take the following steps to help avoid accident  
or injury:  
Guide bar  
Guide bar cover  
Double ended wrench  
Screwdriver  
Chain file  
Reduce the element of surprise by understanding what  
causes kickback.  
Keep a firm grip on the chain saw using both hands, the  
right hand on the rear handle and the left hand on the  
front handle when the motor is running. A firm grip will help  
maintain control. Do not let go whilst the motor is running.  
Make sure that the area of operation is free of  
obstructions. Do not let the point of the guide bar contact  
a log, branch or any other object.  
Use high speeds when cutting.  
Do not overreach or cut above shoulder height.  
Carefully follow the sharpening and maintenance  
instructions given in this manual.  
Use only replacement bars and chains specified by the  
manufacturer.  
7
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Know your product  
1. Guide bar  
2. Chain  
3. Chain tensioning screw  
4. Chain drive cover  
5. Chain drive cover nuts (x 2)  
6. Cylinder cover  
7. Ventilation slide cover  
8. Air filter  
18  
21  
20  
23  
13  
11 12  
10  
6
9
7
14 24 19  
31  
9. Front guard (chain brake)  
10. Top handle  
11. Top cover  
12. Top cover knob  
13. Rear handle  
14. Recoil starter  
15. Idling adjustment screw  
16. Fast run adjustment screw  
17. Slow run adjustment screw  
18. Choke control  
15  
4
5 22  
1
2
19. On/Off switch  
20. Trigger switch  
21. Lock off switch  
22. Chain catcher  
23. Oil tank cap  
24. Fuel tank cap  
25. Drive sprocket wheel (not shown)  
26. Spacer  
3
8
17  
16  
27. Chain tensioner pin  
28. Double ended wrench  
29. Screwdriver  
30. Chain file  
31. Guide bar cover  
29 30  
28  
25  
26  
27  
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6. Place the chain (2) around the  
drive sprocket wheel (25) with  
the chain links in the direction  
shown on the bar and fit the  
chain around the guide bar.  
Installing the guide bar and chain  
WARNING. The chain has sharp  
edges. Use work gloves for safety.  
1. Pull the front guard (9) towards  
the rear of the saw until there  
is a “click” to make sure that  
the chain brake is released.  
7. Fit the chain drive cover  
and fasten the two nuts (5),  
finger tight.  
2. Remove the two chain drive  
cover nuts (5) with the double  
ended wrench (28) and  
remove the chain drive cover (4).  
8. With the guide bar pointing upwards, tighten the chain  
tensioner screw (3) until the links of the chain just touch  
the bottom edge of the guide bar.  
9. With the guide bar pointing  
upwards, tighten drive nuts.  
3. Remove the spacer (26) and discard.  
4. Fully loosen the chain tensioning screw (3).  
10. Check that the chain can be  
smoothly pulled around the  
guide bar by hand and that  
it maintains contact with the  
guide bar, top and bottom.  
To check tension, rotate the  
chain to its tightest condition  
then suspend a 0.9kg weight  
from the chain at the mid  
 
point of the underside of the  
bar. The maximum distance  
 
��  
5. Place the guide bar (1) in  
position over the two threaded  
studs with the chain tensioning  
pin (27), in the hole in the  
guide bar.  
between the driving links and  
the bar should be 6.5mm.  
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NOTE. Ensure the engine is switched off when making any  
adjustments to the chain and bar.  
NOTE. Do not discard an unwanted fuel container with  
household waste. It must be taken to an authorised  
repository site.  
CAUTION. A new chain will stretch after just a few minutes  
of use. Check and, if necessary, re-adjust the chain tension.  
A loose chain causes rapid wear to both the chain and the  
guide bar and could derail causing a major safety hazard.  
Mixing fuel (50:1 mixing ratio)  
1. Measure out the quantities of petrol and oil to be mixed.  
2. Put some of the petrol into a clean, approved fuel  
container.  
Filling up with fuel and oil  
3. Pour in all of the oil and mix well.  
WARNINGS. Petrol is very flammable. Avoid smoking or  
causing any sparks or flames near fuel. Make sure that  
you stop the motor and allow it to cool before refuelling the  
machine. Select outdoor bare ground for fuelling and move at  
least 3m away from the fuelling point before starting the motor.  
4. Pour in the rest of the petrol and again mix well (at least  
one minute).  
5. It is very important to mix the two ingredients properly to  
prevent unnecessary engine wear.  
Only use oil that is expressly labelled for use with air-  
cooled 2-stroke engines. DO NOT use BIA or TCW  
(2-stroke water-cooling type) mixed oil.  
6. Make sure that the container is clearly labelled that it is  
2-stroke mixture.  
Fuelling the chain saw  
The recommended mixing ratio is PETROL 50: OIL 1  
1. The engine must be stopped  
and cool. Place the chainsaw  
on its side with the fuel tank  
cap facing upwards.  
Use unleaded petrol with a minimum Octane number of  
89. If you use petrol with an Octane number lower than 89,  
there is a danger that the engine might overheat and the  
piston seize.  
2. Make sure that the fuel  
mixture is well mixed.  
Poor quality petrol or oil may damage sealing rings, fuel  
lines or the fuel tank. Do not use wasted or regenerated  
oil, it can damage the oil pump.  
3. Remove the fuel tank cap (24).  
4. Fill the fuel tank to about 80%  
of its capacity.  
CAUTION. To maximise the lifetime of the engine, avoid the  
following:  
5. Fasten the fuel cap securely  
and wipe up any fuel spillage  
around the machine.  
Do not use raw petrol, it will severely damage the engine  
very quickly.  
Do not use oil meant for 4-stroke engines, it will cause  
spark plug fouling, exhaust blocking and piston ring  
sticking.  
Do not use fuel mixtures that have been left standing  
for one month or more, they can cause clogging of the  
carburettor.  
Before storing the chain saw for an extended period, empty  
the fuel tank, clean it then run the motor to empty the  
carburettor.  
10  
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4. Hold the chain saw securely  
on the ground and pull  
vigorously on the recoil starter  
(14). Repeat (at least 15  
times) until the engine “kicks”  
(attempts to start).  
Adding chain oil  
WARNING. Never start work  
unless the chain and bar are  
lubricated.  
1. Place the chain saw on its  
side with the oil cap facing up.  
Untwist and remove the oil  
tank cap (23).  
5. With the lock off switch  
(21) held depressed slightly  
pull on the trigger switch (20)  
and then release it. The  
choke control will click back  
one position.  
2. Fill the tank to 80% capacity  
with chain oil.  
3. Fasten the cap and wipe up  
any oil spillage.  
6. Pull the recoil starter (14)  
again and restart the engine.  
Allow the engine to warm up.  
7. When the engine is warm first  
depress the lock off switch  
Starting the chainsaw  
WARNING. Do not start the motor whilst the saw hangs  
from one hand. This is very dangerous as the chain may  
come in contact with your body.  
then pull fully on the trigger switch for a short burst.  
The choke control will fully retract to the RUN position,  
your chainsaw is now ready for use.  
1. Fill the fuel and oil tanks respectively and tighten the  
caps securely.  
2. Set the on/off switch (19)  
to On (the I position). Make  
sure that the chain brake is  
released by pulling the front  
guard (9) towards the rear of  
the saw.  
8. When restarting the engine when it is still warm, set the  
choke control to the START position. Hold the chain saw  
securely on the ground and pull vigorously on the recoil  
starter (14). Allow the engine to run for a few moments  
with the trigger switch pulled slightly.  
3. When the machine is cold first  
pull out the choke control (18)  
to the CHOKE position. (Fully  
withdrawn).  
9. When the engine is fully warm, pull on the trigger switch.  
The choke control will fully retract to the RUN position.  
NOTE. Once the choke control  
has been pulled out, it cannot be  
pushed back to the run position.  
It returns automatically when the  
trigger switch is operated.  
11  
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5. Turn the L screw (17) slowly clockwise until the idling  
speed is at its maximum then turn the screw back  
(anticlockwise) 1/4 of a turn.  
Stopping the chainsaw  
1. Release the trigger switch.  
2. Set the on/off switch (19) to  
Off (the O position).  
6. Turn the idling adjusting screw (T) (15) anticlockwise until  
the chain does not turn.  
7. If the idling speed is too slow, turn screw (T) clockwise.  
8. Make a test cut and adjust screw (16) for best cutting  
power, not for maximum speed.  
Checking the oil supply  
Run the engine at medium  
Chain Brake  
speed and check that the chain  
splatters a thin line of oil which  
can be seen on the ground when  
the bar is pointed downwards.  
This is normal. If there is no  
line of chain oil, stop the motor  
immediately and investigate the  
cause. The oil tank could be  
empty or the oil supply to the  
chain blocked. This may require  
removal of the bar and checking  
that the upper oil hole in the bar  
is clear of any blockages.  
The chain brake operates automatically in the event of  
kickback. As the guide bar (1) kicks up, the wrist of the  
operator’s hand on the top handle knocks against the front  
guard (9) causing the front guard to move forward and  
activating the chain brake.  
1. The chain brake can be  
operated manually by moving  
the front guard forward.  
2. To release the chain brake,  
pull the front guard towards  
the top handle until a “click”  
is heard.  
CAUTION. Check that the chain brake is operating correctly  
each time the chain saw is used.  
Adjusting the carburettor  
The carburettor is factory set and  
should not require adjustment.  
Changes in operating conditions  
may require fine tuning of the  
carburettor. Proceed as follows.  
H
L
Bucking spikes  
The Chainsaw has bucking spikes to assist with cutting  
and reduce the chance of kickback, use them as follows:  
T
1. Fit the bucking spike in the bark at point A.  
1. Stop the engine and screw in  
both the H and L needles (16  
and 17) using screwdriver (29).  
Do not force.  
2. Using point A as a pivot point lift  
the rear of the chainsaw so the  
chain enters the wood to be cut.  
3. Pivot and repeat the operation  
until the trunk has been cut  
completely.  
2. Turn the H screw (16) back 3/4 of a turn.  
3. Turn the L screw (17) back 1-1/2 turns.  
4. Use the central part of the  
bar and never the tip for  
cutting purposes.  
4. Start the engine and let it warm up with the trigger switch  
half pulled in. When the engine is warm, release the  
trigger switch.  
12  
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5. Remove the cylinder cover (6).  
Operating in cold temperatures  
6. Remove the slide cover, turn  
it the other way round with the  
snow crystal symbol at the  
top and the sun symbol at the  
bottom and replace the slide  
cover in the cylinder cover.  
Replace the cylinder cover and  
restore all other components in  
their original positions.  
The ventilation slide cover (7) is factory set for use of the  
chain saw in normal temperatures. It can be changed for  
use in temperatures around or below freezing point. In this  
case the position of slide cover (7) is reversed to allow the  
air entering the carburettor to be first warmed by the engine  
to increase the efficiency of the operation.  
1. Turn off the engine.  
2. Loosen top cover knob (12)  
and remove cover (11).  
Operation  
WARNINGS.  
3. Remove air filter (8) and  
disengage the choke control  
(18) from its grommet in the  
cylinder cover (6) and also  
remove the idle adjustment  
screw cover.  
Always follow the safety instructions given at the front  
of this manual. This chain saw must only be used for  
cutting wood. It must not be used for cutting other types  
of material. Do not use the chain saw as a lever for lifting,  
moving or splitting objects.  
4. Remove the four screws that secure the cylinder cover  
(6).Three screws are located in the chamber under the  
top cover. The fourth screw is located at the top front left-  
hand side of the saw.  
Do not attach the chain saw to a fixed stand.  
Do not attach any devices to the chain saw other than  
those specified by the manufacturer.  
Helpful hints  
Do not force the saw into the cut. Apply only light pressure  
whilst running the engine at full throttle.  
If the saw chain gets caught in the cut, do not try to  
remove it by twisting the guide or pulling forcibly. Use a  
lever or wedge to open up the cut so that the saw chain  
is freed.  
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While cutting, always:  
Felling a tree  
WARNING. Felling a tree should only be done by  
trained operators.  
Run the chainsaw motor at full revs. This makes the job  
safer, as there is less chance of pull-in or kick-back.  
Position your body to the left of the chainsaw so if it kicks  
back uncontrollably, it goes over your right shoulder,  
never stand in the cutting line of the saw.  
Decide the direction in which  
you wish the tree to fall taking  
into account the direction  
of the wind, the position of  
branches, lean of the tree,  
ease of subsequent limbing  
and bucking and other factors  
prevalent at the time.  
Keep a firm grip with your left hand on the front handle,  
with your thumb securely below the handle.  
The swivel of your wrist in a kick-back situation will  
activate the chain brake.  
Make sure the chain is tensioned correctly.  
1. Clear the area around the tree and make sure that you  
have a good foothold and clear retreat path.  
Guard against kickback  
Check the operation of the chain brake each time you use  
the chain saw.  
2. Ensure that others in the area are aware of the felling  
and ensure people and animals are well clear.  
Run the saw at full throttle for 1-2 seconds then push the  
front guard (9) forwards. The chain should stop immediately.  
If the chain is slow to stop or only slows down you must  
take the tool to an authorised repair centre to have the  
brake band and clutch drum replaced. Disengage the chain  
brake by pulling the front guard backwards until you hear  
a click. Do not use the chain saw if the chain brake is not  
operating correctly.  
3. Make a notch cut one-third of the way into the tree on the  
felling side.  
4. Make the felling cut on the opposite side to the initial  
notch and slightly higher than the notch. As the felling cut  
gets close to the notch cut, the tree will begin to fall.  
5. Remove the saw from the cut, stop the engine with the  
on/off switch (19), put the saw down and leave the area  
along the retreat path.  
Be constantly aware of the position of the upper quadrant  
of the blade tip. This is the part that triggers a kickback  
when it hits resistance.  
1
Limbing  
Limbing is the process of  
Never engage the upper quadrant of the guide bar with  
whatever you are cutting and avoid contact with any  
hidden branches or obstructions. Ensure there is a clear  
work area.  
removing the branches from  
a fallen tree.  
2
Check the direction in which a branch will bend before  
cutting it. Always cut on the opposite side to the bending  
direction so that the guide bar is not pinched in the cut.  
For large limbs that cannot be removed in one cut, make  
an initial cut from the bent side and finish by sawing from  
the opposite direction. Do not remove limbs that are  
supporting the fallen tree on the ground until the tree has  
been cut into lengths.  
Always clear away brush, vegetation and any obstructing  
debris before attempting a cut that might trigger a  
kickback.  
Avoid cuts that will cause the chainsaw to jam in a tree  
trunk or limb.  
Observe the size of wood shavings, if they become dusty  
your chain could need sharpening.  
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2. Remove the air filter (8).  
WARNINGS. Always keep a balanced stance. Do not stand  
on the log. Be alert to the fact that the log may roll over.  
When working on a slope, always stand on the uphill side  
of the log.  
3. Split the air filter into its two  
halves and clean the mesh.  
Dry particles can be removed  
by tapping on a hard surface.  
More stubborn dirt may  
require washing out the filter  
with petrol or using an air  
compressor.  
Bucking  
Bucking is cutting a log into  
lengths for easier handling.  
To saw a log lying on the ground,  
1
2
2
1
first saw halfway, then roll the log  
over and cut from the opposite  
side. To saw the end of a log  
supported off the ground, first  
4. Re-assemble the two halves  
and replace the airfilter, top  
cover (11) and knob (12).  
5. Take off the guide bar (1)  
and maintain it as follows,  
remove any sawdust from the  
groove in the guide bar.  
saw up from the bottom one-third through the log then finish  
by sawing down from the top. To saw a log in the middle of  
two supports holding it off the ground, first saw down from  
the top one-third through the log then finish by sawing up  
from the bottom.  
6. Make sure that the oil port is  
not clogged. Grease the nose  
sprocket at the tip of the  
guide bar.  
CAUTION. Avoid cutting into the ground as this will very  
quickly dull the saw chain.  
7. Check for fuel and oil leakage  
and loose fastenings,  
especially those securing the  
handles and the guide bar. If  
any defects are found, take  
the tool to an authorised  
repair centre.  
Pruning  
Pruning is the removal of a limb  
or branch from a standing tree.  
2
WARNINGS. Do not use an  
unstable foothold or ladder. Do  
not overreach. Do not saw above  
shoulder height. Always use both  
hands to hold the saw.  
1
8. Clean any dust away from the cooling vents as clogged  
vents can cause overheating.  
First cut up from the bottom and finish down from the top.  
Maintenance  
NOTE. Before cleaning your chain saw or carrying out any  
maintenance procedure, make sure that the engine is off  
and is cool. Disconnect the spark plug to prevent  
accidental starting.  
Maintenance to be preformed after each use  
1. Loosen the top cover knob (12) and remove the top  
cover (11).  
15  
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Chain sharpening  
Sharpen the chain regularly to maintain optimum  
performance of the saw. Signs of a dull chain are:  
The sawdust becomes powder-like  
Extra force is required to execute a cut  
The cut does not track in a straight line  
Increased vibration  
Increased fuel consumption  
WARNING. Wear heavy  
gloves when handling the chain.  
Hold the guide bar (1) securely  
in a vice.  
Sharpen each cutter using  
the chain file (30). Always use  
outward strokes.  
After sharpening, the cutters  
must all have the same width  
and length. After every 3-4 times use an authourised repair  
centre to professionally sharpen your saw chain. They have  
the special tools necessary to ensure the correct cutting  
angles and depths.  
Guide bar wear  
Reverse the guide bar every 8 working hours to ensure  
uniform wear. Check the bar rails frequently and if  
necessary remove burs and square-up the rails using a  
flat file.  
16  
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17  
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18  
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19  
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Carefully read the entire Instruction Manual  
before using this product.  
Before returning this product for a Warranty Claim or any other reason  
Please Call 1300 880 001 (Australia) or 0800 445 721 (New Zealand)  
When you make your call, please have the following information at hand:  
GMC Product Type  
GMC Product Code  
A GMC Service Engineer will take your call and, in most cases, will be able to solve your problem over the phone.  
You are welcome to use this phone-in service to make suggestions or give comments about any GMC product.  
With continuing product development changes may have occurred which render the product received slightly  
different to that shown in this instruction manual.  
The manufacturer reserves the right to change specifications without notice.  
Note: Specifications may differ from country to country.  
Helpline 1300 880 001 (Australia) or 0800 445 721 (New Zealand)  
and enter your receipt details.  
The GMC 777 Helpline operates from 7am to 7pm, 7 days a week (EST).  
This allows you to contact GMC directly with any queries  
and technical questions you have regarding products.  
Save this Manual for future reference  
GMC Head Office:  
45-55 South Centre Road, Melbourne Airport, Victoria, Australia 3045  
Telephone (03) 8346 1100 Fax (03) 8346 1200  
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