. OPERATION OPERATION TRAVELING DOWNHILL When traveling downhill, travel at a safe speed which matches the width of the road, the condition of the road surface, and other conditions of the jobsite. WARNING 3 - 95 When the machine stops, p ut blocks under the tires immediately. sing the retarder, see the brake performance graph for the For the maximum permissi ble speed when traveling downhill u h for the downhill distance and grad e. Traveling continuously downhill at a speed greater than t he maximum permitted spee d on the brake performance graph is dangerous as the retarder brake may be damaged.
If the retarder oil temperatu re caution lamp on the machine moni tor lights up when the retarder is being used, shift down to travel downhill. (When this happens, the central warning lamp lig hts up and the alarm buzzer sounds.) If the caution lamp does no t go out even when the transmission i s shifted down, stop t he machine immediately, set the shift lever to the N position, run the engine at 1800 rpm, and wait for t he caution lamp to go out. again. If the retarder loses its effec t when it is used for traveling downhi ll, do as follows. 1. Release the retarder cont rol lever completely, then operate the retarder control lever 2.
If the retarder still has n o effect even when the retarder contr ol lever is operated a gain, return the retarder cont rol lever completely to the release for repairs. d position, then depress the brake ped al to stop the machine, and contact your Komatsu di stributor If the brake is applied suddenly, there is danger that the tires will slip. Operate the retarder slowly. If the brake is applied suddenly, the re is danger that the ti Do not move the gear shift l ever to the N position when the mach ine is traveling or whe n it is traveling down a slope . Always place the transmission in g ear before traveling.
o If the transmission is in N eutral, the engine cannot provide any braking effect and th e steering wheel will become heavier. In addition, there will be lac k of cooling oil for the retarder, so the re is danger that it wil l overheat or that the actuati on of the brake will be poor. o There may also be damag e to the transmission or other parts of t he power train, and the re is danger of unexpected a ccidents. NOTICE If the retarder control lever i s operated when traveling downhill, th e transmission can be shifted down sooner than wit h normal deceleration. It is also poss ible to travel without shifting up. Do not accelerate or shift up when using the retarder.
The engine speed will rise and this may cause the alarm buzzer to sound and the central warning lam p to flash.