The electronic components in the HEUI fuel system are very similar to those used in other EUI systems. However, in the HEUI system, the injectors are not actuated by a camshaft. A high pressure hydraulic pump, which draws oil from the pressure side of the lubrication pump, raises the pressure to a maximum of 22800 […]
Category: D9R
HEUI fuel system components
The water separator (1), which also functions as a primary fuel filter, is an important part of the fuel system. As with any high pressure fuel system with operating pressures at approximately 150000 kPa (22000 psi), fuel quality is important. Water in the fuel can cause corrosion of the plungers and barrels. Dirt can cause […]
3408E Engine D9R
The HEUI system has many features and benefits not possible with mechanical fuel systems. These features include a very clean exhaust, improved fuel consumption and cold starting, simplified maintenance with fewer moving parts, and reduced operating costs. The HEUI system eliminates many of the mechanical components of a “pump and line” system. It also provides […]
Left side of machine D9R
The primary fuel filter (1) and the secondary fuel filter (2) are located on the left side of the machine behind an access door. Also located in the compartment are the fuel hand primer pump (3), the fuel shutoff (4) from the tank, the windshield wiper fluid reservoir and individual washer pumps (5) which are […]
3408 Engine D9R
The air supply to the 3408 Engine flows through a “bonnet-type” inlet screen (1), which is mounted on the hood. A daily inspection of the inlet screen is important to ensure that dirt or other material does not clog the screen and restrict the flow of air to the engine. Also, a tubular-type precleaner is […]
Air conditioner components D9R
For machines equipped with an optional air conditioning system, the compressor (1) is located in the front of the engine compartment. The compressor is driven by a belt which is connected to a pulley on the front of the engine. The compressor is used to change the refrigerant from a low pressure, low temperature vapor […]
Crankcase oil drain D9R
Access to the drain plug for the crankcase oil is provided by removing the crankcase drain access cover. The D9R utilizes an “ecology-type” drain valve to help prevent spills or oil loss when the system is drained. To drain the oil, remove the plug (1) and then turn the valve (2). The valve can be […]
PRELUBRICATION STARTING SYSTEM D9R
The D9R can also be equipped with an optional engine prelubrication starting system. A prelubrication starting system will prime the engine with oil before the starter begins to crank the engine. This system reduces engine component wear that usually occurs during start-up. The prelubrication starter is located on the left side of the engine toward […]
24-Volt Electrical System D9R
The main battery compartment is located on the left side of the machine below the platform outside the cab door. Two 12-Volt maintenance free batteries connected in series provide 24 Volts to start the engine. To access the batteries, loosen the fastener on the battery compartment and lift the cover. Another battery compartment is located […]
Operator Station D9R (2)
The dozer control lever (1) is located at the right of the operator’s seat. The standard implement control lever allows the operator to control all the blade functions from one lever. Pushing the lever to the forward detent position causes the blade to FLOAT. When the lever is in the forward position (just to the […]