24. SERVICE PROCEDURE 24.2.4 CHECK AND TIGHTEN TRACK SHOE BOLTS If the machine is used with track shoe bolts loose, they will break, so tighten any loose bolts immediately. Method for tightening (shoe bolt) 1. First tighten to a tightening torque of 1372 ± 137 Nm (140 ± 14 kgm, 1013 ± 101 lbft)) then check that the nut and shoe are in close contact with the link contact surface. 2. After checking, tighten a further 120° ± 10°. Method for tightening (master link connecting bolt) 1. First tighten to a tightening torque of 686 ± 69 Nm (70 ± 7 kgm, 506 ± 51 lbft) then check that the link contact surfaces are in close contact. 2. After checking, tighten a further 180° ± 10°.
Order for tightening Tighten the bolts in the order shown in the diagram on the right. 24.2.5 CHECK ELECTRICAL INTAKE AIR HEATER Before the start of the cold season (once a year), contact your Komatsu distributor to have the electrical intake air heater repaired or checked for dirt or disconnections. 3-31