How to Solve Caterpillar Loader Machine Trouble Code 1239-1

Caterpillar Loader machines are known for their reliability and durability. However, like any other machinery, they can encounter issues from time to time. One common problem that operators may come across is trouble code 1239-1, which indicates a “Fuel Rail Pressure Is Low” error. In this article, we will discuss the possible causes of this issue and provide some solutions to help resolve it.

Caterpillar ET 2023C 2019C 2018A Electronic Technician Free Download
CAT Adapter 3 ET4 478-0235 High Quality Diagnostic Adapter
Caterpillar SIS 2021 2019 2018 Full EPC+Service Manual Free Download
Caterpillar Factory 18 Digits Password Service

Before we delve into the solutions, it is important to note that at this time, there is no known permanent solution for this particular trouble code. However, there are some steps you can take to mitigate the problem until a permanent solution is identified.

First, let’s look at the machines that may experience this trouble code:

– Compact Track Loader 299D2 (S/N: FD21-UP; BY41-UP)
– 299D2 XHP (S/N: DX21-UP; DX91-UP)
– Multi Terrain Loader 297D2 (S/N: BL71-UP)
– 297D2 XHP (S/N: HP21-UP)
– Skid Steer Loader 272D2 (S/N: BL21-UP)
– 272D2 XHP (S/N: MD21-UP)

Now, let’s move on to the possible solutions:

1. Check for lack of fuel to the engine:
If the trouble code only occurs when the fuel tank is low, it is likely that the fuel tank is the cause. When traveling across a slope with an incline greater than 18.4 degrees and the fuel tank is less than a quarter full, the fuel tank pickup tube may be above the fuel level. To address this, ensure that the fuel tank is adequately filled to prevent fuel starvation.

Additionally, check the fuel tank cap. If air vents when the fuel cap is removed, it indicates a venting issue. Inspect the fuel cap and replace it if the orange diaphragm is missing.

Furthermore, clogged filters can also contribute to low fuel pressure. Document the hours on the fuel filter and visually inspect the lift pump screen for any signs of clogging. If necessary, replace the fuel filter and lift pump filter to ensure proper fuel flow.

Finally, check that the lift pump creates approximately 83 kPa (12 psi) of pressure when deadheaded. Also, verify that the lift pump flow is approximately 0.5 gpm with free flow.

2. Check wiring and connectors:
Inspect the wires for the rail pressure sensor (A), pressure discharge valve (B), and pre-stroke control valve (PCV) (C). Ensure that they are not bent excessively or pulled tight at the connectors. Look for any signs of damage or wear on the wires and connectors. If any issues are found, repair or replace the affected components as necessary.

In conclusion, while trouble code 1239-1 may not have a permanent solution at this time, there are steps you can take to address the issue and keep your Caterpillar Loader machine running smoothly. By checking for lack of fuel, inspecting filters, and ensuring proper wiring and connectors, you can mitigate the effects of this trouble code. Remember to follow proper safety protocols and consult a professional if needed.

Be the first to comment

Leave a Reply

Your email address will not be published.