INSTRUCTION MANUAL - Alessandri srl

70 ––––– 5. MAINTENANCEHave a set of maintenance tool always ready.Have a set of maintenance tool always ready for checking the machinery.Ask for our help with periodic checks and maintenance work.Our professional engineers with good expertise and skills will help you with maintenance, inspection and servicing.Consult your dealer.Tightening torque for bolts and nutsApplying excessive tightening torque to a bolt or nut may loosen or damage a tightened part, and too smalltightening torque may cause a oil leak from the mounting surface or a loose bolt, which leads to componentfailure. On essential parts, bolts and nuts should be tightened with an accurate tightening torque using atorque wrench in a correct way and correct order.When removing parts is required for maintenance, consult your dealer.The followings are the standard tightening torque for standard bolts and nuts.IMPORTANT:The tightening torque described below should be applied only to the bolts with "7" on theirhead. (JIS strength classification: 7T)• Apply 60% tightening torque for the bolts which do not appear here.• Apply 80% tightening torque when tightened to aluminum alloy.Thread size × Pitch mm M6×1.0 M8×1.25 M10×1.5 M12×1.75 M14×1.5 M16×1.5Tightening torqueN•m(kgf•m)10.8±1.0(1.1±0.1)25.5±2.9(2.6±0.3)49.0±4.9(5.0±0.5)88.3±9.8(9.0±1.0)137±9.8(14.0±1.5)226±9.8(23.0±2.0)