Husqvarna 181 Workshop Manual Download | Manualshive

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Summary of Contents for 181

Page 1: ...Workshop manual chain saw model 101 88 11 26 181 ...

Page 2: ...cal D a t a 3 2 ServiceD a t a 5 3 SpecialTools 7 4 F u e l system 1 1 5 Electricsystem 17 6 Lubricating system 1 7 Cylinder Piston 23 8 Crankcase Crankshaft _ 9 Starter 33 10 wCentrifugalClutch 35 11 SafetyEquipment 37 ...

Page 3: ...RCJ 7Y 0 5 mm 0 020 56 watts at 120 r s 7 200 r rein Diaphragm carburetor make Tillotson type HS 216 Basic setting H 1 0 L 1 0 0 85 Iitres 0 22 US gallon 0 19 Imp gallon Fuel mixture 4 1 25 With Husqvarna Twostroke Oil 2 1 50 0 50 Iitres 0 13 US gallon 0 11 Imp gallon Automatic No supply during idling Adjustable for 4 different delivery rates Recommended ositions Bar 18 Pos 2 Bar 20 and more Pos 3...

Page 4: ...0 sec 0 2 kp cm2 2 8 psi per 30 see TOOIS 5025038 01 Pressure gauge 5025047 01 Cover plate inlet port 5025081 01 Cover plate exhaust port Fuel tank PreSSUre 0 05 MPa 0 5 kp cm2 7 I p L No leakage permitted 5025038 01 Pressuregauge Starter Make sure that it is possible to turn the pulley at least about 1 4 turn further when the cord is pulled out completely Carburetor p 0 03 MPa 0 3 kp cm2 4 3 psi ...

Page 5: ...screw spark plug protector 5 5 4 5 3 5 3 Allen key Fitting tool compl for crankshaft and sealing ring p 9 N o T 5 Stud fitting tool H 5 8 5 Socket spanner 5 Holding bar compl R 5 Ball bearing puller compl 5 Piston sto 5 Revolution counter 5 Vacuum gauge compl 7 ...

Page 6: ...ouch paint orange 1 8 I a C ampingdevice 5 A5 Glue adhesive 5 5 SEM electric system tester 5 Air gap tool d 5 Extractor sealing ring 5 Puller for engineblock Q 5 Fitting drift sealing ring 5 Loctite AA normal locking power 5 b Loctite AAV strong locking power 9 ...

Page 7: ...ness Fuel and oil The twostroke engine is lubricated by oil mixed with petrol in various pro portions depending on the type of oil used Ordinary twostroke oil 1 25 4 oil Husqvarna Twostroke oil 1 50 2 oil See also the mixing table below M t Mixing table 2 4 Litres Pints Litres Petrol in Petrol in Litres Petrol in Petrol in of oil of oil of petrol Imp gallon US gallon of petrol Imp gallon US gallon...

Page 8: ...te that the centre pin of the diaphragm enters the forked end of the lever of the needle valve Connect the pressure gauge 5025038 01 to the fuel inlet of the carburetor and pump until a pressure of 0 03 MPa 0 3 kp cm2 is reached Check for any leakage at the needle valve or at the gasket on the pump side The easiest way of locating leakages is to pour some petrol where you suspect the leakages to b...

Page 9: ...e 57 mm 0 o 5 Cover plate inlet port o Q o 5 Cover plate exhaust port o 5 Assembling pliers centrifugal clutch 5 Repair kit for elec tric cables 5 Cable clip pliers 5 Fitting sleeve for sealing ring T5 U spanner for vibration damper 4 5 Hook for fuel filter ...

Page 10: ...fuel filter as follows Loosen the fuel hose from the carburetor and lay the chain saw on the clutch side Open the tank cap If there is enough fuel in the tank some of it now ought to run out of the hose After having made the abovementioned checks you make a basic adjustment of the carburetor needles i e H 1 turn open and L 1 turn open Start the chain saw and warm it u by applying full throttle and...

Page 11: ...ction to the needle valve nor the metering diaphragm Check that the filter screen near the main jet is not dirty or damaged M s Clean all fuel lines and jets with compressed air Replace damaged or worn parts with new ones Assembly P s Locate the fuel screen carefully in its seating Locate the pump diaphragm next to the carburetor housing and then add gasket and cover Tighten the four screws of the...

Page 12: ... guide I r r e g u i d l s p e x x E n g i s t o w h a c c e l e x c h o r e q u i x x x x L e a n o u x x x x x x N f u s u p D i f f i c a d j u s t Too r i c s u p N i d l i s p e E x t r n e e p o s i x x x x x x x x x x x x 15 ...

Page 13: ...eed position Then open it equivalent to 10 min on a clock face to obtain a somewhat richer supply to aid acceleration By means of the T needle adjust the idling speed to 2 300 2 500 r rein ensuring that the chain does not rotate when engine is idling Give full throttle a couple of times to check that the engine responds If not open the L needle by abt 3 min Check again A H Adjust the high speed ne...

Page 14: ...k all cables and connections Cables that are squeezed or otherwise damaged should be exchanged Check simultaneously the gap between the magnet of the flywheel and the core of the module The gap should be 0 30 mm Use air gap tool 5025134 02 If no ignition after checks A 1 A 4 the igntion coil should be exchanged by means of a special tester eg our electric system tester No 5025124 01 see chapter 3 ...

Page 15: ...t retain the pump Use Allen key No 5025019 01 Remove the pump from the crankcase by levering around the edges of the housing with screwdrivers Lift the suction hose and oil filter out of the oil tank Clean the parts and change any that may be damaged Check if there is dirt in the suction channel A by rotatin9 the PumP shaft in both directions When the pump works properly and is filled with oil the...

Page 16: ...embly is made in reverse order The flywheel nut should be tightened by torque 30 35 Nm Do not forget the washer under the flywheel nut Check the gap between flywheel and electronic unit Use air gap tool No 5025134 02 F s p To ensure proper connection between switch spring and ignition cable use assembling pliers No 5025006 01 for fitting the switch spring on the ignition cable 18 ...

Page 17: ...6 Lubricatingsystem H Trouble shootingguide T o m u l u b r i c a I n s u f f i c l u b r i c P l a s d r i v g e d a m a L u b r i c a o n i f e l l p o s i L e a k x x I x x x x x x x x x ...

Page 18: ...t a piece of wood to make the pump piston slide out of the casing Assembly Asssembly of the oil pump is made in reverse order to dismantling 1 Check that the sealing ring C on the pressure side is fitted clean and undamaged Use sleeve No 5025052 01 to protect the sealing ring when the pump is fitted into the crankcase 2 After fitting the pump into the crankcase check that the pump piston turns eas...

Page 19: ...haust port and combustion chamber Control Check the following before assembly and take the measures required Broken cooling fins damaged threads or broken stud In case of severe damages exchange the cylinder at exhaust port Restore the thread by means of HeIi Coil inserts Seizure marks in the cylinder wall especially at Polish the marks with a fine emery clotch to remove exhaust port aluminium dep...

Page 20: ...7 Cylinder Piston H Connect the choke control fuel hose and throttle push rod to the carburetor Fit the screw for the air filter elbow ...

Page 21: ... should point towards the exhaust port Push the wristpin in and fit the circlips Turn them round with a pair of flat hose pliers to check that they run smoothly in the grooves Lubricate the piston with a few drops of oil Fit the supporting piece in mounting set No 5025070 01 below the piston Pressthe piston rings by means of the piston ring compressor in mounting set No 5025070 01 Push the cylinde...

Page 22: ...r and piston Drain the oil tank and fix the chain saw in the clamping device No 5025102 01 Remove the oil pump from the crankcase Note the thrust Lift the oil hose and filter out of the oil tank Remove the cylinder base gasket Remove the six screws three on each side that connect the crankcase to the tank unit Separate the crankcase from the tank unit 27 ...

Page 23: ...ave the crankcase in the clamping device to cool down Fit the balI bearing in the magneto side of the crankcase as described above but on the work bench Fitting tool is not necessary Turn the crankcase in the clamping device in order to get the crankshaft in an upright position Grease the gasket face and fit a new gasket Locate the magneto side of the crankcase ensuring that the gasket is not disp...

Page 24: ...nkshaftcheck A defective crankshaft must be replaced Some crank webs may be blue coloured around the crankpin This is however a normal result of the heat treatment around the crankpin hole Check the big end of the connecting rod Should there be seizure marks or discolored spots on the sides the crankshaft must be changed The connecting rod should not show any radial play up and down The axial play...

Page 25: ... Check the vibration dampers before reassembling the tank unit and the crank case If they are limp or damaged they should be changed Use U spanner No 5025066 02 Assemblyof crankcase tank unit Assembly of the crankcase tank unit is made in reverse order ...

Page 26: ...red in the crankcase Fit the seal ring on the magneto side Use fitting tool No 5025030 08 but on the reverse side The distance between the sealing ring and the upper part of the seat A should be 3 5 mm If lessthe flywheel will damage the sealing ring Fit the oil pump see chapter 2 Fit the cylinder and pressure test the crankcase see chapter 2 ...

Page 27: ...nto the starter housing Lubri cate with a few drops of ordinary engine oil Put the plastic cover back and tighten the screws If necessary exchange the starting cord and fit it on the pulley Wind up the cord 3 turns on the pulley Note right direction and put it in its place in the starter housing Check that the spring grips the pulley then fit the washer and the screw Pull the cord through the cord...

Page 28: ...that its ends connect in the centre of a clutch shoe Do not overstretch the spring 1 Changingthe worm gear The worm gear of the oil pump drive is easily removed from the clutch drum It has four dogs which fit into four corresponding grooves in the clutch drum When fitting a new gear put it in the clutch drum and check that it fits exactly into the grooves of the drum Then fit the drum with gear on...

Page 29: ... w _f Lubricate the worm gear of the oil pump drive with Molykote before fitting the clutch drum The needle bearing is to be lubricated with ball bearing grease Two pumps with the grease gun into the hole of the crankshaft are sufficient ...

Page 30: ...ease the brake Remove the screw from the front support of the hand guard by means of Allen key No 5025019 01 Remove the two sleeveswith a screw driver Loosen the nut M and lift off the hand guard When dismantling the brake band use a drift 4 mm to push out the roll pin The catch may be changed after pushing out the roll pin with a drift 4 mm Check the wear on the locking part of the catch see A 37...

Page 31: ...d make a rough check on the spot as follows Hold the saw horizontally over a trunk at a height of abt 25 cm As the saw by force of its own weight swings around the rear handle and hits the trunk the brake should be released Note that during this check the engine must not be running M c b Clean the brake band and the mechanism Check that the band has at least 0 75 mm thickness on the most worn part...

Page 32: ...e lever shaft and the lever The safety catch is removed by pushing out the roll pin with a drift 2 mm Reassembly is made in reverse order to dismantling Check that the spring enters the groove of the safety catch correctly and that the throttle lever works properly C Changingthe chain catcher Do not forget to check the chain catcher and change it when damaged Remove the clutch cover Use Allen key ...

Page 33: ...ltivators Cylinder Lawn Mowers Echo Chainsaws Echo Strimmers Electric Chainsaws Fertiliser Spreaders Garden Blowers Garden Rollers Lawn Rollers Garden Shredders Garden Tractors Garden Vacuums Hayter Lawn Mowers Hedge Cutters Hedgecutters Hover Mowers Husqvarna Chainsaws Kawasaki Brush Cutters Kawasaki Strimmers Lawn Mowers Scarifiers Lawn Tractors Leaf Blowers Leaf Vacuums Petrol Chainsaws Petrol ...

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