Bobcat t870 fuel problems

Bobcat t870 fuel problems DEFAULT

7256789 | Delphi Fuel Pump fits Bobcat D34

Restore performance to your Doosan Bobcat 3.4L D34 Diesel Engine with the Genuine OEM 7256789 by Delphi.

FEATURES:

Bobcat Part # 7256789
Remanufactured, Genuine OEM, There is a refundable core charge associated with this product
12-Month Unlimited Mileage Warranty
Necessary Gaskets and Seals are Included

Additional OE Part Numbers: 7334031REM, 7334031, EX836100

Applications:

S750 Bobcat Skid-Steer Loader
S770 Bobcat Skid-Steer Loader
S850 Bobcat Skid-Steer Loader
T750 Bobcat Compact Track Loader
T770 Bobcat Compact Track Loader
T870 Bobcat Compact Track Loader
A770 Bobcat All-Wheel Steer Loader

About the Manufacturer:

Delphi Technologies is a global supplier of Fuel Systems products to both the OEM and the aftermarket. Their reach goes beyond Diesel into hybrids, electric vehicles, and gasoline applications. Delphi has been around for decades and can be trusted to keep your diesel engine running strong.

Additional information to know:

Injections pumps are a critical part of your diesel engine’s operation. Both older mechanical injection systems and newer high pressure common rail injection systems are vulnerable to foreighn debris, poor fuel quality, or water in fuel. Prior to installing your replacement injection pump on engine, it is very important to identify the cause of the initial failure. If the injection pump is replaced prior to making sure all fuel lines, fuel rails, and injectors are free of metal and other debris, your replacement pump may fail prematurely.

Warranty by product type. Below is a list of products and associated warranties:
Diesel Fuel Injection Pumps: 12 Months, Unlimited Miles/Hours
Turbochargers: 12 Months, Unlimited Miles/Hours
Diesel Fuel Injectors: 12 Months Unlimited Miles/Hours
Select Common Rail Injectors: 24 Months, Unlimited Miles/Hours
All Other Products: Warranted against defects of material/workmanship as shipped
**Note: Unless otherwise stated, no labor warranty included**

SKUBobcat 7256789
SKUDelphi EX836100
SKUBobcat 7334031
SKUBobcat 7334031REM
Sours: https://mydieselpro.com/product/7256789-bobcat-d34-fuel-injection-pump/

High-Pressure Common Rail (HPCR) fuel system

High-Pressure Common Rail (HPCR) fuel system

A highly efficient fuel injection system is essential for the clean operation of a diesel engine. HPCR is an advanced fuel injection design that does a better job regulating fuel pressure and injection timing. HPCR is already being used on Bobcat’s high-output engines, and its Engine Control Unit (ECU) technology is instrumental in meeting Stage IIIB and Stage IV requirements.

It allows the application of further technologies such as Diesel Oxidation Catalyst (DOC), Selective Catalytic Reduction (SCR) and Diesel Particulate Filter (DPF) systems, which are described below.

 

How does HPCR work?

Fuel Pressure

  • The high pressure pump applies high pressure to the fuel (1600 – 2400 bar)
  • The Common Rail stores pressurised fuel
  • The injectors deliver fuel to the engine

 

Injection Timing

The ECU (Engine Control Unit) controls the injectors precisely to allow multiple fuel injections during each combustion cycle.

 

The benefits of better combustion

High pressure transforms the fuel into an extremely fine mist as it leaves the injectors. The fuel combusts more thoroughly in this form, leading to:

  • Lower fuel costs: as the fuel burns more completely, the engine needs less of it.
  • Cleaner exhaust: less unburned fuel is emitted in the exhaust.
  • Better performance: multiple injections during each combustion cycle make combustion last longer, creating more energy and more output from the engine.
  • Increased comfort: longer-lasting combustion lowers peak engine cylinder pressure, which reduces engine noise levels, making operation more comfortable.
Sours: https://www.bobcat.com/eu/learn/technology/high-pressure-common-rail-fuel-system
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Fuel Injection Pump, 7256789

The fuel injection system is a major area of focus for advancement towards clean operating diesel engines. High-pressure common rail fuel system is an advanced fuel injection design that regulates fuel pressure and injection timing.

  • The pump applies high pressure to fuel (22,000 “ 34,000 psi)
  • The common rail stores pressurized fuel
  • The injectors deliver fuel to the engine

Fuel injection pump failure can be for two reasons:

  • Mechanical problems within the injection pump housing like debris clogging the injector. Will-fit fuel injection pumps may have defective internal parts which disrupts timing of the fuel transfer process, requiring a complete replacement,
  • Low or dirty fuel which effects the lubrication of the fuel pump or causes clogs.

Fits the following Bobcat equipment:

All-Wheel Steer Loader: A770

Skid Steer Loaders: S740, S750, S770, S850

Toolcat Work Machines: T740, T750, T770, T870

VersaHandlers: V519, V723

Parts can vary depending on your serial number. Check the Bobcat Online Parts Catalog to ensure the correct part for your equipment.

Sours: https://www.bobcatparts.com/engine-components/7256789-fuel-injection-pump.html

Troubleshooting Bobcat Doosan D18 | D24 | D34 Fuel Systems

We get a lot of calls from our customers asking about the various components on the Bobcat common rail fuel injection systems. One of the most common problems we hear about is equipment where fuel has been contaminated and contamination has moved to the fuel injection pump, the fuel rail, and the fuel injectors. Here are a few tips to help you get your Bobcat equipment up and working the way it should be.

The Injection Pump:

The Bobcat D24 and D34 injection pump for these engines is extremely sensitive to fuel contamination. If the injection pump is failing or has failed, the engine may not start or run but with low power.

A quick check you can do with the injection pump is to connect a scanner to the equipment and monitor desired vs actual rail pressure. If the injection pump is failing, the pump will have a difficult time keeping up with desired engine rail pressure.

Diesel Pro can test your injection pump. If you are interested in having your pump tested, give us a call.

D24 Pump: 7249380 Injection Pump

InletMeteringValve:

We get asked frequently about whether the inlet metering valve can be checked on the equipment. The inlet metering valve is responsible for metering rail pressure on the Bobcat D24 and D34 diesel engine. If the valve fails, the engine has no way of responding to commands to move rail pressure up or down.

One quick check you can do with the Inlet metering valve (IMV) is to put your finger on the valve and turn the key on in the equipment. You should feel a small vibration when the IMV is energized. If you do not, your IMV may be bad or wiring to the IMV may be compromised.

7256772 Inlet Metering Valve

FuelInjectors:

The Fuel injectors for the Bobcat Doosan D24 and D34 engines are high pressure common rail by Delphi. The most common reason for failure we see in these injectors is fuel contamination. The fuel control valves in these injectors are very small and any amount of debris in the injector can get lodged in the control valve and cause problems.

As we spoke about the injection pump and rail pressure earlier, the fuel injectors can also bleed rail pressure. With a scanner, you can monitor desired vs actual rail pressure to check and see if the engine has adequate rail pressure. The injectors will bleed rail pressure through the fuel return or could even have a nozzle stuck open (less common). Bobcat equipment software has a test to check the injectors to see if the respond to a signal.

Diesel Pro has developed an 8-step testing procedure to electronically simulate the on-engine conditions on our test equipment. If you are interested in having us test your injectors, give us a call.

D18 & D24 Injectors: 7275454 FUEL INJECTOR
D34 Fuel Injector: 7261663 Bobcat Doosan D34 Fuel Injector
Fuel Rail:

When the fuel system becomes contaminated with metal or other debris, chances are this debris will settle into the fuel rail. Bobcat recommends replacing the fuel rail when customers have an issue with contamination. The reason for this is there is no great way of cleaning the fuel rail. If you replace the injection pump or injectors and do not replace the fuel rail, there is a chance the debris sitting in the rail from a previous failure will once again be introduced into the components which were just replaced and cause premature failure.

D24 Fuel Rail 7030409 FUEL RAIL

Summary:

  • Fuel contamination is the leading cause of failure
  • If you are experiencing rail pressure codes or problems, it is most likely an issue with your injection pump or injectors
  • Keep the fill area on your equipment clean and free of debris
  • Change the fuel filter regularly to keep your fuel as clean as possible

 

Applications:

  • Excavators: E32, E35, E42, E45, E50, E55, E85
  • Toolcat Machines: 5600, 5610
  • Skid Steer Loaders:  S450, S510, S530, S550, S570, S590, S595, S630, S650
  • Track Loaders:  T450, T550, T590, T595, T630, T650
Sours: https://mydieselpro.com/troubleshooting-bobcat-doosan-d24-and-d34-fuel-systems/

Problems fuel bobcat t870

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Bobcat No Start, Troubleshooting Fuel System and Replacing A Fuel Injector in the Bobcat D24 engine

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