16. TROUBLESHOOTING 16.4.3 CHASSIS ( ): Always contact your Komatsu distributor when dealing with these items. In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs. If “02” or “04” is displayed, stop the machine at a safe place and apply the parking brake. After checking the service code, contact your Komatsu distributor for repairs.
2-114 Problem Main causes Remedy Torque converter oil temperature monitor lamp flashes ‡ Leakage of oil or entry of air due to damage or defective tighten- ing of oil pipe, pipe joint ‡ Wear, scuffing of gear pump ‡ Insufficient oil in transmission case ‡ Loose fan belt ‡ Clogged oil cooler ‡ Long distance traveled in torque converter range ‡ Disconnected, broken wiring to sensor (‡ Check, repair) (‡ Check, replace) ‡ Add oil to specified level. See CHECK BEFORE STARTING. ‡ Replace belt. See EVERY 500 HOURS SERVICE.
(‡ Clean or replace) ‡ Drive in direct range (‡ Repair, connect wiring) Steering wheel is heavy ‡ Lack of grease at link ‡ Internal leakage inside steering cylinder ‡ Add grease (‡ Replace cylinder seal) Steering wheel pulls ‡ Tire inflation pressure not uni- form on left and right ‡ Dragging, pulling of front brake ‡ Make tire inflation pressure uniform. See CHECK BEFORE STARTING. ‡ Check wear of front brake pad. For details, see EVERY 500 HOURS SERVICE.
Braking effect is poor when brake pedal is depressed ‡ Pad has reached wear limit ‡ Rear disc has reached wear limit ‡ Insufficient air pressure ‡ Insufficient brake oil ‡ Air in brake circuit (‡ Replace pad) (‡ Replace disc) ‡ Charge to specified pressure ‡ Add brake oil. See CHECK BE- FORE STARTING. ‡ Bleed air. See WHEN RE- QUIRED. Brake pulls to one side