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
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
Since September 2004, Avtodiesel OJSC has switched to equipping YaMZ engines that meet Euro-1 and Euro-2 requirements with fan drives equipped with an electromagnetic switch
The power unit, depending on the model and configuration, can be equipped with a clutch of several models
The nozzle of the YaMZ-238 diesel engine is of a closed type, with a multi-hole atomizer and hydraulic control of the needle lift
Engine fuel supply equipment - split type
The fuel pump assembly is shown in fig. 1.
With a high-pressure fuel pump, the speed controller 5, the fuel priming pump 9 and the fuel injection advance clutch 4 are combined in one unit
The YaMZ-6583.10 engine is designed for installation on onboard vehicles, chassis, truck tractors, dump trucks produced by KrAZ Holding Company
Remove the cylinder head
Remove the crankcase and crankcase gasket
Cylinder liners are “wet” type, made of special wear-resistant cast iron
A high-pressure fuel pump (HPF) of the “Compact-40” type with an electronic control system (ECS) assembled with an actuator mechanism, a fuel priming pump and a damper clutch is shown in Figure 1
The first maintenance of injectors is carried out after 250 hours of operation from the start of engine operation
Inspect the cylinder block. If it has cracks, it needs to be replaced