When servicing each injector, check and adjust in the following order:
1. Adjust each nozzle to the injection start pressure:
The service life of the engine depends on the timely and thorough lubrication, as well as on the grade and quality of the oils and greases used
Install the driven coupling half (Fig. 1, 2) on the advance clutch (damper clutch) and fasten with bolts
The normal operation of the engine and its long service life can only be ensured if all recommendations are followed.
Power units are designed for operation at ambient temperatures from minus 60ºС to plus 50ºС, relative humidity up to 98% at a temperature of 25ºС, air dust content up to 0.4 g / m 3, as well as for movement car in mountainous conditions at an altitude of up to 4500 m above sea level and overcoming passes up to 4650 m above sea level with a corresponding decrease in power and economic indicators.
To adjust the fuel injection advance angle, two hatches are provided on the flywheel housing (see Fig. 1), and the angle values \u200b\u200bare marked on the flywheel in two places
Thermal gaps in the valve mechanism are used to ensure a hermetic fit of the valve on the seat, when the parts of the valve drive expand during engine operation
The YaMZ-238 diesel engine is equipped with a turbocharger that uses the energy of exhaust gases to boost the engine
The engine cooling system (fig. 1) is liquid, circulating, including a water pump, a liquid-oil heat exchanger, a fan, thermostats
Motors are equipped with a friction fan drive designed to turn the fan on and off depending on operating conditions
Dismantling and assembling the cylinder head
Remove the cylinder head only to troubleshoot parts of the cylinder-piston group, cylinder head gasket, valves, or to replace the head itself
Cylinder liners are "wet" type, made of special cast iron
Crankshaft - steel, made by hot stamping.
All surfaces of the shaft are nitrided and the depth of the nitrided layer is at least 0.35 mm.
The power unit, depending on the model and configuration, can be equipped with a gearbox of several models and different configurations
Before installing the demultiplier with a spacer on the crankcase of the main box and the spacer on the crankcase of the demultiplier, apply the anaerobic sealing compound UG-6 TU 6-01-1285-84 to the gaskets on both sides with a continuous strip 2-3 mm wide along the contour
Threaded connection / Tightening torque Nm (kgf m)
Main bearing cap bolts:
Proper operation of the gearbox and its service life are directly dependent on the culture of operation, so you need to carefully consider all routine maintenance provided for in this manual
