. OPERATION TROUBLESHOOTING 3 - 151 CHASSIS ( ) : Always contact your Komatsu distributor when dealing with these items. In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs. Problem Main causes Remedy Torque converter oil temperature caution lamp flashes Leakage of oil or entry of air due to damage or defective tightening of oil pipe, pipe joint ( Check, repair) Wear, scuffing of gear pump ( Check, repair) Insufficient oil in transmission case Add oil to specified level. See CHECK BEFORE STARTING. Loose fan belt Replace belt. See EVERY 500 HOURS SERVICE.
Clogged oil cooler ( Clean or replace) Long distance traveled in torque converter range Drive in direct range Disconnected, broken wiring to sensor ( Repair, connect wiring) Steering wheel is heavy Lack of grease at link Add grease Internal leakage inside steering cylinder ( Replace cylinder seal) Steering wheel pulls Tire inflation pressure not uniform on left and right Make tire inflation pressure uniform. See CHECK BEFORE STARTING. Dragging, pulling of front brake Check wear of front brake pad. For details, see EVERY 500 HOURS SERVICE.
Braking effect is poor when brake pedal is depressed Brake pulls to one side Pad has reached wear limit ( Replace pad) Rear disc has reached wear limit ( Replace disc) Insufficient oil pressure Charge to specified pressure Insufficient brake oil Add oil to the transmission case. See CHECK BEFORE STARTING. Air in brake circuit Bleed air. See WHEN REQUIRED. Dump body speed is slow Defective gear pump ( Replace gear pump) Insufficient oil Add oil to specified level. See CHECK BEFORE STARTING. Suspension is hard Entry of soil or sand due to breakage of dust seal, gas leakage due to breakage of U-packing ( Replace U-packing) Gas leaking from valve core ( Replace valve core)