. OPERATION EXPLANATION OF COMPONENTS Conditions for switching fan rotation When using manual reverse rotation function 3 - 52 REMARK itched, the reverse rotation pilot lamp flashes. When the fan rotation direction is sw itched, the reverse rotation pilot lamp flashes To protect the machine, the fan rota tion direction may not change when the fan is operating under high lo ad or in low temperatures. (For details, se e Conditions for switching fan rotation.) rotation direction returns to the normal direction. When the engine is stopped, the fan rotation direction returns to the normal direction.
If the switch is set to position (b) (man ual reverse rotation ON), the switch will return to position (c) (Neutral) when the switch is released. Even if position (b) of the switch is n ot kept pressed, the fan will rotate in the reverse directi on for a fixed time, so there is no need to keep the swit ch pressed at position (b). During reverse rotation of the fan, if t he engine cooling water, hydraulic oil, or torque c onvert er oil o verhea t (the caution lamp for the oil temperature gauge on the machine monitor lights up), the reverse ro tation of the fan is forcibly stopped and the fan switche s to rotation in the normal direction. f the automatic reverse rotation functions: (Standard:
2 hours) se rotation (Standard: 2 minutes) to carry out the adjustment It is possible to adjust the following o Cycle fan automatic reverse rotation Continuous time fan automatic rever Please ask your Komatsu distributor Switching from normal rotation to reverse ro tation to reverse rotation only if all the following conditions are fulfilled. fan reverse rotation pilot lamp on the machine monitor will change from fan direction will not change. ing fan reverse rotation pilot lamp on the machine monitor will continue to tic reverse rotation switch is pressed once. d 1200 rpm.
The fan will switch from normal rotation to reverse rotation only if all the following conditions ar e fulfill If the direction is switched, the cooling monito hange flashing and will stay lighted up. If all the conditions are not fulfilled, the If ing fan reverse rotation pilot lamp on the machin Portion (b) of the cooling fan automa The engine speed is between Lo an The engine water temperature is less than 90°C (194°F). (The indicator on the engine water t emperature g auge is below horizontal) The hydraulic oil temperature is less than 90°C (194°F). (The indicator on the hydraulic oil t emperature g auge is below horizontal) The torque converter oil temperatu re is below 100°C (212°F).
(The indicator on the torque converter oil tal) ter the engine was started. temperature gauge is below horizon At least 30 seconds have passed af itor will continue to