OPERATING AND MAINTENANCE-C.2 Alternative Method is turned to the "heat" position, the element should become red hot, and upon engagement of the starter motor ignition of the fuel should take place. With some engines, a different starter switch is pro- vided and the cold start aid is operated by means of a separate push button switch. 4.108, 4.107 and 4.99 engines are fitted with efficient starting equipment and no responsibility can be accepted for any damage caused by unauthorised start- ing aids. The cold starting procedure is the same i.e. Switch on by turning the starter switch in a clockwise direction to the first position.
Press the heater button for fifteen to twenty seconds and then, with the heater button still pressed, turn the starter switch in a further clockwise direction to engage the starter motor. As soon as the engine starts, release switch and heater button. To prevent thermostart damage, it is essential that the thermostart is not operated DRY. After any operation which allows fuel to drain from the the thermostart feed pipe, the pipe must be disconnected at the thermostart and all air bled from the pipe before the thermostart is operated. I Glow Plugs Where a thermostart starting aid has to be replaced, care must be taken not to exceed the torque figure quoted on Page B.2.
Excessive torque loading can crack the insulator adaptor causing an electrical short and hard starting characteristics. Glow plugs are sometimes fitted to engines in applica- tions such as refrigeration units, fork lift trucks and other certain 4.108 mechanically governed engines rated at 3,000 rev/min and below. As the buss bar connecting these glow plugs may not be insulated, extreme care must be exercised to keep pipes, clips or other metal objects well clear as the consequences of a direct short of this buss bar to earth when energised are obvious. It must be noted that in no circumstances should either or any other unauthorised starting aids be used at the same time as glow plugs.
To operate, use the following procedure :- Before operating the starter motor, press the "Heat" button for 20 to 30 seconds. I With the "Heat" button still pressed, engage the I starter motor until the engine starts. I Continue to press the "Heat" button for a few seconds I after the engine has started until even running has : been obtained. Ilf the engine does not start, disengage the starter I motor, but keep the "Heat" button pressed for a I further 10 to 15 seconds, when a further attempt should Stopping the Engine A spring loaded stop control is located near the normal engine controls and functions by cutting off the fuel at the fuel injection pump.
To operate, pull the knob and hold in mis position until the engine ceases to rotate. Ensure that the control returns to the "run" position, otherwise difficutly may be experienced in re-starting the engine. Return latest cold start switch to the "0" position. Some engines may have an electric solenoid stop control on the fuel injection pump operated by a switch on the control panel. Running In Procedure I be made to start the engine, keeping the glow plugs I energised whilst starting and for a few seconds after ithe engine has fired until even running is obtained.
It is not necessary to gradually run-in a new or factory rebuilt engine and any prolonged light load running during the early life of the engine can in fact prove harmful to the bedding in of piston rings and liners. Points to Note Full load can be applied On a new or factory rebuilt engine as soon as the engine is used, provided that the engine is first allowed to reach a temperature of at least 140°F (60°C). Ensure that the electrical connection to the starting aid is correctly made. Always ensure that the reservoir feeding fuel to the starting aid is fully primed and is not leaking.
With some later engines, this fuel reservoir has been deleted, the cold start aid being fed direct from the fuel filter through a non-return valve. PREVENTIVE MAINTENANCE I These preventive maintenance periods are general in I application. Check the periods given by the manu- Extended use of the cold starting equipment above the time periods already stated should be avoided, other- wise the starting aid in the induction manifold may be damaged also continuous flaming will starve the engine of oxygen. I facturer of the equipment in which the engine is 1 installed and, where necessary, use the shorter periods.
I These periods and procedures must also be adapted I to ensure correct operation for any local machine I regulations. I It is good maintenance to check for leakage and loose I fasteners at each service interval. In the event of difficult starting, check that fuel is reaching the starting aid in the induction manifold by unscrewing the inlet fuel connection. If fuel is reaching it satisfactorily, then it may be that the starting aid it- self is not working correctly. This can be checked by removing the air cleaner and watching the starting aid whilst the equipment is used.
When the starting switch I 1 hese maintenance periods are only for engines that I are operated with fuel and lubricating oil to the I The schedules which follow must be applied at the I interval (miles, kilometres, hours or months) which I specifications given in this manual. I occurs first.