Check

Elimination of the revealed malfunction in system is carried out by a method of replacement of faulty blocks on the serviceable.

Detection of malfunction carry out in the following order:

– connect the voltmeter or a control lamp 12В between feeding cable of a glow plug and "weight" (for example, unpainted massive parts of the engine);

– include ignition (work better to carry out with the assistant who will put in action system of prestarting heating by means of the ignition key or opening and the subsequent closing of a door of the driver, depending on a design) and check tension giving from the storage battery to a candle (after the termination of the period of heating tension should will go down to zero).

At air temperature of 20 °C time intervals of giving of tension to glow plugs should make 5–6 with at a burning control lamp and 10 with, since the moment when the control lamp will go out. Time of burning of a control lamp increases at fall of temperature and decreases at its increase.

If a food to a glow plug does not move, the reason most likely or in failure of the relay of a glow plug (if it is applied in this system), or in malfunction of conducting.

Replacement of a faulty glow plug carry out in the following order:

disconnect the plug of a "minus" wire from a conclusion of the storage battery;

– disconnect the main feeding cable from a glow plug clip;

– by an ohmmeter measure resistance between a clip of a candle and the plug of a "minus" wire. If the received value is more than several ohm (resistance of a glow plug approximately equally 1–1,5 Ohm), the candle is faulty;

connect the ampermeter between feeding cable of a candle and a candle and measure a steady current of consumption, ignoring thus initial fluctuation which approximately for 50 % will be higher. At high consumption of a current or, on the contrary, its total absence the candle is faulty;

– carry out visual survey of a candle (for this purpose the glow plug is necessary for removing).

PREVENTION In order to avoid a burn do not touch glow plugs if the system of prestarting heating just worked or the engine was switched off recently.

Removal of a glow plug carry out in the following order:

disconnect a wire from the minus plug of the storage battery;

Fig. 3.76. Removal of a fixing plate of that tire (nuts of fastening of a core of the tire and a washer are removed previously)

отвернтите fastening nuts also remove washers from a fixing plate of that tire then remove that tire (fig. 3.76)

Fig. 3.77. Glow plug removal from a head of the block of cylinders.

– turn out a glow plug and take it from a head of the block of cylinders (fig. 3.77) . Check a candle on existence of mechanical damages. A large number of a deposit or destruction of a tip of a candle — the testimony of malfunction of a fuel nozzle which is subject to replacement. Similarly carry out visual survey of other candles. If necessary replace faulty fuel nozzles.

Operability of a glow plug can be checked, submitting on it tension of 12 Century. The serviceable glow plug heats up to reddening of a working tip during 5 pages. If heating time more than 5 with or when giving tension heats up the candle center, instead of its tip, the candle is faulty and is subject to replacement.

Fig. 3.78. The fuse of a power-supply circuit of a glow plug protected by a plastic casing

Installation of a glow plug is carried out to sequences, return to removal. Before installation it is recommended to grease a carving part of a candle with special antiprigarny structure. After a candle nazhivleniye in a carving opening of a head of the block of cylinders tighten it the regulated moment.

PREVENTION Observe precautionary measures at check of operability of a glow plug. Hold I shine with a special clip or flat-nose pliers. The electric power-supply circuit of a glow plug should be supplied with the fuse (fig. 3.78) . After carrying out check do not hurry to establish a candle into place, and let's to it be cooled within several minutes.