Husqvarna 3120K Operator's Manual

Also see for 3120K: Workshop manual supplement

English – 13Fitting the cutting headRemove the bolts (1). Removethe cover. Fit the drive beltover the clutch drum. Refit thecover and tighten the bolts.Feed the drive belt over thepulley on the cutting head (2).Slide on the belt cover andsecure the cutting headtogether with the belt guard.Tighten both bolts (4) by hand.Screw in the tensioning screw(3) so that the square nut is inline with the arrow on the beltguard. Shake the head toensure the spring can tensionthe belt. This automaticallyadjusts the belt to the correcttension. Tighten both bolts (4)using the combinationspanner.NOTE! After fitting a new beltthe belt tension must bereadjusted after the first twotanks of fuel have been used.Fitting the cutting bladeHusqvarna cutting blades aremanufactured and approvedfor freehand cutting. Thepaper labels on each side ofthe blade are there todistribute the pressure fromthe flange washer and preventthe blade from slipping.The blade is placed betweenthe flange hub (A) and theflange washer (B). The flangewasher is turned so that it fitsin the flange hub. The cuttingblade is tightened using thesocket spanner 501 69 17-02.The shaft can be locked usinga screwdriver, steel pin or thelike. This is slid in as far aspossible. The blade is tighte-ned clockwise.Tightening torque for the boltholding the blade is:15-25 Nm (130-215 in.lb).A B! WARNING!16 inch blade and blade guard should only beused on power cutters originally equippedwith a 16" blade guard. If a blade guard isfitted as a spare part on a power cutteroriginally equipped with a 14" blade guard, the16" cutting blade will rotate too fast. A cuttingblade with too high speed can burst or causeserious injury and damage.ASSEMBLY124 3Checking the drive shaft and flanges• Check that the threads onthe drive shaft areundamaged.• Check that the contactsurfaces of the cutting bladeand flanges are flat, runcorrectly on the spindle andare free from foreignobjects.Do not use flanges that aretwisted, have damagededges, untrue or dirty. Donot use different sizeflanges.Blade guardThe blade guard shouldalways be fitted on thepower cutter.The guard should be adjustedso that the rear section isclose to the work piece.Cutting fragments and sparksare then collected by theguard and led away from theuser.