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10

CHAIN SAW’S SAFETY FUNCTION

 WARNING:

•  Following  safety  functions  does  NOT  guarantee  all  time  protection  from  injury. 

Only proper usage and technique can reduce the risk of kickback and other 

dangerous accidents.

•  Always check the safety functions before use.

•  If the chain saw fails any of the checking, switch off the engine immediately, and do 

NOT use the chain saw. Contact Makita authorized service center.

Chain brake

The chain brake is designed to stop the chain to standstill within a fraction of a second. 

It is activated when the kickback is sufficiently strong.
To engage the chain brake manually, push the front hand guard forward (forwards the 

tip of the saw) with your left hand. 
To release the chain brake, pull the front hand guard towards backward (towards you). 

NOTICE:

•  Do not accelerate the engine with the chain brake actuated (except for testing). 
•  Always release the chain brake before starting the operation. 

Checking the chain brake

1.  Run the engine at idle speed. 

2.  Hold the chain saw with both hands. Hold the top handle with your right hand, 

the front handle with your left. Make sure that the guide bar and the chain do not 

contact with any object.

3.  Push  the  front  hand  guard  using  the  back  of  your  hand,  until  the  chain  brake 

engages. 

4.  Accelerate till engine reaches full throttle for less than 3 seconds. Make sure that 

the saw chain does not move at all.

5.  Bring the engine back to idle and release the chain brake.

Checking the brake band

The brake band is at the back of the sprocket cover. Chain brake wears out in course 

of time. Have it checked and serviced by Makita authorized service center at least 

every 3 month.

Throttle trigger lock-out

Throttle trigger lock-out is designed to prevent accidental start. You can pull the throttle 

trigger only when the throttle trigger lock-out is pressed (i.e. when you grasp the handle).

Checking throttle trigger lock-out

Check the throttle trigger lock-out returns its original position after releasing your hand 

from the top handle.

Engine stop

Make sure that the engine stops when you intend to.

Checking the engine stop

Start the engine. Then release the throttle trigger, and press down the combination 

switch to lower (O) position. 

Chain catcher

Chain catcher is designed to catch the chain in case the saw chain jumps from the 

guide bar. The saw chain should not jump if it is properly tensioned. Always check 

and adjust the tension of the saw chain in accordance with this instruction manual. 

Checking chain catcher

Check the chain catcher is not damaged and securely sits on the housing.

Summary of Contents for EA3700T

Page 1: ...hain Saw ORIGINAL INSTRUCTION MANUAL Important Read this instruction manual carefully before putting the chain saw into operation and strictly observe the safety regulations Keep this instruction manual EA3700T ...

Page 2: ...Caution kickback Particular care and caution Warning This saw is to be used by properly trained operators only Chain brake Forbidden Hold the saw with both hands while working One handed use is extremely hazardous Wear protective helmet eye and ear protection Fuel and oil mixture Wear protective gloves Chain oil fill oil pump Use appropriate protection for foot leg and hand arm Saw chain oil adjust...

Page 3: ... following protective equipment must be used during operation of the chain saw The kind of clothing should be appropriate i e it should be tight fitting but not be a hindrance Do not wear jewelry or clothing which could become entangled with bushes or shrubs If you have long hair always wear a hairnet It is necessary to wear a protective helmet whenever working with the chain saw The protective he...

Page 4: ...handle with the left hand Hold the handles tightly with your thumbs facing your fingers It is extremely dangerous to work with one hand as the saw can fall through the completed cut uncontrolled high risk of injury Furthermore it is impossible to control kickback with one hand CAUTION When releasing the throttle lever the chain will keep on running for a short period of time freewheeling Continuou...

Page 5: ...piece with your foot and do not allow anyone else to hold or steady it For cutting down trees or performing crosscuts the spike bumper Z must be applied to the wood to be cut 13 Secure round pieces against rotation Hold the saw firmly in place to avoid skating skid movement or bouncing of the saw when starting a cut At the end of the cut be careful to keep your balance due to the drop Take into ac...

Page 6: ... Perform the cut near the ground When correcting the cut always do so over the whole width of the notch Cut down the tree 18 B above the bottom edge of the notch D The cut must be exactly horizontal The distance between both cuts must be approx 1 10 of the trunk diameter The material between both cuts C serves as a hinge Never cut it through otherwise the tree will fall without any control Insert ...

Page 7: ...s or accessories and guide bar chain combinations or lengths which are not approved bring a high risk of accidents We cannot accept any responsibility for accidents and damage resulting from using sawing devices or accessories which have not been approved First aid For the event of a possible accident please make sure that a first aid kit is always immediately available close by Immediately replac...

Page 8: ...in case of kickback Chain speed at max power m s 19 Sprocket pitch mm inch 0 95 3 8 Number of teeth Z 6 Due to our continuing program of research and development the specifications herein are subject to change without notice Specifications may differ from country to country Guide bar and saw chain Guide bar type Sprocket nose bar Saw chain Type 91PX Bar length 300 mm 350 mm 400 mm Cutting length 2...

Page 9: ...er 4 Front hand guard 5 Guide bar 6 Saw chain 7 Air cleaner cover 8 Hook attachment point 9 Muffler cover 10 Sprocket cover 11 Chain adjusting screw 12 Retaining nut 13 Combination switch 14 Throttle trigger lock out 15 Starter grip 16 Oil tank cap 17 Starter case 18 Fuel level gauge 19 Fuel tank cap 20 Guide bar cover ...

Page 10: ...nt hand guard using the back of your hand until the chain brake engages 4 Accelerate till engine reaches full throttle for less than 3 seconds Make sure that the saw chain does not move at all 5 Bring the engine back to idle and release the chain brake Checking the brake band The brake band is at the back of the sprocket cover Chain brake wears out in course of time Have it checked and serviced by...

Page 11: ...aining nut 4 Remove the sprocket cover NOTICE You can not remove the sprocket cover without releasing the chain brake 5 Place the guide bar over the bar bolts 6 Check the direction of the saw chain The arrows on the saw chain must point the same direction as the arrow on the saw housing 7 Fit the saw chain at the sprocket first then fit the saw chain on the guide bar tip 8 Lift the saw chain over ...

Page 12: ... the chain tension frequently new chain tends to become longer during use To adjust tension of the saw chain perform the following procedure 1 Release the chain brake by pulling the front hand guard 2 Unscrew the retaining nut a bit to loosen the sprocket cover 3 Slightly lift and hold the tip of the guide bar 4 Turn the chain adjusting screw to adjust the saw chain tension 5 Adjust the chain tens...

Page 13: ...l results in making more polluting combustion residues It also causes clog exhaust channel in the cylinder and muffler and causes poor performance and excessive fuel consumption The Storage of Fuel Fuels have a limited storage life Fuel mixtures age through evaporation especially at high temperatures Aged fuel and fuel mixtures can cause starting problems and damage the engine Purchase only that a...

Page 14: ...te with adjusting screw There are three degrees of the oil pump feed rate i e high middle or low Adjusting screw locates at the top of the chain saw Use a screwdriver and adjust the amount of oil delivery appropriately Cleaning the oil guide To ensure secure operation of the oil pump clean the oil guide groove at the housing and the oil feed hole in the guide bar regularly Checking the chain lubri...

Page 15: ...o 10 pushes 2 Move the combination switch to the choke position This also actuates the half throttle lock 3 Pull the starter grip slowly until feeling compression Then pull it strongly It may take two to four attempts until engine fires 4 As soon as the engine fires move the combination switch to the middle I position Then pull the starter grip strongly again until the engine starts running 5 Gras...

Page 16: ... adjust the screws H and L in the illustration If the saw chain moves in idle without pulling throttle trigger it is necessary to adjust the idle speed Adjust the idle speed as follows 1 Start and warm up the engine for two or three minutes but do not drive the engine at high speed 2 To reduce the idle speed turn the adjusting screw counterclockwise 3 To increase the idle speed turn the adjusting ...

Page 17: ...ch Generally two or three strokes of the file are enough Have the chain resharpened at a service centre when you have already sharpened it yourself several times Proper sharpening CAUTION Use only chains and guide bars designed for this saw Excessive depth 3 increases the risk of kickback Sharpening criteria for saw chain 91PX 91VXL Maintain all cutter parts 1 on the saw chain the same length Cutt...

Page 18: ... has markings for the correct sharpening angle of 30 When using the file holder align the markings parallel to the saw chain and limit the filing depth to 4 5 of the file diameter After sharpening the chain check the depth of the cut using the chain gauge tool optional accessory Remove the small excess with a special flat file optional accessory Round off the front of the depth gauge Replacing the...

Page 19: ...arter grip and make a knot as illustrated 5 Pass another end of the rope through the rope guide of the starter case 6 Pass that end of the rope through the rope guide of the reel and make a knot Pull the rope lightly to place the knot into the reel 7 Place the reel onto the starter case as the hook on the back of the reel engages with the hook of the spiral spring 1 3 2 4 ...

Page 20: ...ile pulling the starter rope fully and holding it turn the ratchet wheel Make sure that the ratchet wheel still can make half turn at that state If it does not turn rope tension is too tight In that case remove the starter grip from the rope and then release and rewind the starter rope again NOTICE The tool may be broken if the rope tension is too tight 13 Fit the starter case in position and tigh...

Page 21: ...t dirt or foreign materials from falling into the carburetor 2 Loosen the bolt and remove the air cleaner cover 3 Remove the air cleaner NOTE During cleaning cover the opening with a clean cloth to prevent dirt or foreign materials from falling into the carburetor Replace the air cleaner immediately if it is damaged 4 Tap it or clean it with a brush or air compressor to remove the dirt NOTE Depend...

Page 22: ...ion head is used to filter the fuel required by the carburetor Perform visual inspection periodically 1 Open the tank cap use a wire hook and pull out the suction head through the tank opening 2 If the filter is hard or clogged up replace it 3 After checking cleaning or replacing fix the fuel filter onto the fuel pipe with the hose clamp Push the fuel filter in all the way to the bottom of the fue...

Page 23: ...place it Cleaning the cylinder space CAUTION Always wear eye protection After long period of operation dust may accumulate in cylinder space It may cause overheating of the engine Clean the cylinder space occasionally Perform cleaning as follows 1 Remove the sprocket cover muffler cover starter case and fan cover 2 Clean the cylinder space and cylinder fins Use a brush or air compressor if necessa...

Page 24: ...t at a dry and clean place Biologically degradable saw chain oil can only be kept for a limited period Beyond two years after manufacture biological oils begin to acquire an adhesive quality and cause damage to the oil pump and components in the lubricating system Before taking the chain saw out of service for a longer period empty the oil tank and fill it with a small quantity of engine oil SAE 3...

Page 25: ...eed rate Combination switch Inspection Throttle trigger lock out Inspection Throttle trigger Inspection Fuel tank cap Check tightness Oil tank cap Check tightness Air cleaner Cleaning Idle speed The saw chain does not move at idle speed Cylinder space Cleaning Spark plug Inspection Cleaning Muffler Check tightness of screws Chain catcher Inspection Screws and nuts Inspection Fuel filter Inspection...

Page 26: ...arburetor See section Prevention from carburetor icing No oil on the saw chain Oil tank is empty Fill the oil tank Oil guide groove is dirty Clean the groove Oil delivery is not adjusted properly Adjust amount of oil delivery Oil pump malfunction Ask your local authorized service center for repair Chain does not stop even the chain brake is activated Brake band worn down Stop using the tool immedi...

Page 27: ...27 ...

Page 28: ...885380 875 IDE Makita Corporation Anjo Aichi Japan www makita com ...

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