Dissassemble the brake mechanism and replace worn or damaged parts. The brake band should have a minimum thickness of 0. Assembly Mod. Begin with by fitting the hand guard. Lubricate all moving parts with thin oil. Fit the brake spring by means of a Phillips screwdriver.
Fit the plate clamp over the spring. Make sure that the guide pin on the brake fits into the hole in the crankcase before the screws are tightened. Fitthecoverplateontheguidebar attach- ment. Do not forget the washer between the crankcase and brake! Lift up the toggle-joint carefully by means of a screwdriver. Dismantle the hand guard. Press the hand guard out of the bearing. The other end of the spring is controlled by a pin which goes into the centre.
For this reason do not try to lift up the spring there. Remove the lock-ring by means of a small screwdriver. Hold your thumb over so that the ring does not fly away. Observe care so that the sprin loaded catch does not fly away. The brake spring is tensioned with a very large force and can cause perso- nal injury if the brake is not released prior to further work. Hold your hand over. Press out the sprung tubular pin and pull out the plate insert from the hand guard. Clean and check all parts.
The thickness of the brake band should be at least 0. Press down the hand guard in the correct position. Press out the spring tensioned tubular pin and pull out the complete plate insert from the hand guard. Replace the insert if the bearing pin is worn.
Clean all the parts of the chain brake and check them for wear or damage. Replace the brake band if it is worn more than this. Begin by fitting the hand guard.
Lubricate the bearing pin and catch with oil. Place the catch in position with the extruding part downwards. Press away the catch by means of a screwdriver and press down the hand guard in the correct position. Fit the lock-ring on the bearing pin. Press together the brake spring far enough so that the guide pin in the back of the spring housing is released.
Press down the spring and check that the pin goes into the centre of the spring. Press down the brake band in its rear attachment A. Place the toggle-joint in position over its bearing pin B. Make sure that it is correctly positioned.
Press the brake spring over the guide pin. Push the guide sleeve in the spring and outside of the guide pin. Press the spring together by means of a suitable Phillips screwdriver far enough so that the guide pin in the back edge of the spring housing is released. Fit the chain brake on the engine. Check that the guide pin on the chain brake goes into the corresponding hole in the crankcase. The engine should be switched off during this check.
Hold the saw approx. H mm over a stable object. Release the front handle and allow the saw to turn round the back handle by virtue of its own weight. When the guide bar point hits the object the brake should be activated. Hold the handle with both hands and rev up. Release the chain brake by turning the left wrist towards the hand guard without releasing the grip round the front handle.
The chain should stop immediately. Chain catcher Replace the chain catcher if it is deformed or cracked. Checking of the brake effect Place the saw on a stable surface and start the engine. Chain catcher The chain catcher has the purpose of catching the chain if it breaks. It is therefore important that it is not deformed or cracked.
Replace if this should be the case. Throttle lock Dismantling Remove the screws. Remove the handle half, throttle control and lock. Throttle lock Dismantling Removethescrewswhichholdthehandle halves together and where appropriate also the screw which holds the spring for the vibration damper. Lift off the handle half and throttle control together with the lock. Do not lubricate! Fitting mod. Dismantle the spring and throttle control lock. Dismantling mod.
Dismantle the covers by means of pres- sing a screwdriver into the back edge of the covers. If the handle is electrically heated see chap. Press out the sprung tubular pin which is located behind the cover far enough so that the spring and the throttle control lock can be lifted off.
The sprung tubular pin should go through the spring eyelet. Fit in the reverse order to dismantling. Thank you very much for your reading. When working on the starter unit wear protective glasses to avoid eye injuries in the event that the return spring flies out. Dismantling 1. Dismantle the starter from the engine unit. Remove all screws and lift off the starter. You can download and read. Regularly check that the muffler is securely attached to the chain saw. Page 9 2 Throttle lock Make sure the throttle control is manuual at the idle setting when you release the throttle lock.
Fuelling The oil pump The chain is lubricated by an automatic oil pump. Page 22 C Clearing the trunk and preparing your retreat Remove any branches that are in the way. Page 12 2 Sharpening your chain and adjusting raker clearance The risk of kickback is increased with a badly sharpened chain! Technical Data Recommended original and replacement bar and chain combinations Following is a list of recommended cutting equipment for the Jonsered chain saw model To do this it is best to work from the top down jjonsered keep the trunk between you and the chain saw.
Check the throttle trigger elements are not soft or for smooth operation. The oil pump The chain is lubricated by an automatic oil pump. Air Filter Air filter The air filter must be regularly cleaned from dust and dirt in order to avoid: The chain is correctly tensioned when there is no slack on the underside of the bar, but it can still be turned easily by hand.
To maintain cutting performance you must file back the raker teeth to the recommended height. Mounting Guide Bar And Chain Mounting guide bar and chain Always wear gloves, when working with the chain, in order to protect your hands from injury. Always wear safety goggles for eye protection. Below you will find some general maintenance instructions. If you have more questions, contact your servicing dealer. If the muffler on your saw is fitted with a spark arrestor mesh this must be cleaned regularly.
If any binding occurs, or if engine fails to return to idle, the saw should be taken to your dealer, before it is used again. The cooling system consists of: Readjust if use of any bolts other than genuine Jonsered replacements necessary.
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