Where to Find the Orifice Tube on a Peterbilt 379 Truck

The orifice tube on a Peterbilt 379 is located on the high side of the AC system.

Peterbilt 379 Orifice Tube Location

The Peterbilt 379 is a classic American semi-truck known for its reliability and durability. Installing a new orifice tube in this vehicle is a straightforward job, with the tube located close to the evaporator core of the vehicle’s AC system, typically beneath the dash. A few simple tools and some patience are all that’s needed to complete this procedure.

To begin, you’ll need to disconnect the battery of your Peterbilt 379. Once it is disconnected, you can open the hood and locate the evaporator core, which is located at the center in front of you. It consists of several lines connecting different parts of your AC system. Find and disengage the rubber fitting that contains the orifice tube and carefully work it loose from its position so you can remove it from your truck.

Next, inspect the orifice tube for signs of leakage or blockage. If there is any obstruction or corrosion on its surface, clean it off with brake cleaner or rubbing alcohol so your new part will fit properly. Now insert your replacement tube inside its position carefully making sure that it is placed correctly before securing it back in place.

Finally, reconnect all parts of your truck’s AC back together as they were before and reconnect your battery to complete this procedure. Your newly installed orifice tube will ensure optimal performance from your truck’s AC while protecting essential components from damage due to overworking conditions.

What Is An Orifice Tube In Peterbilt 379?

An orifice tube is a component of a vehicles refrigeration system and is typically located behind the evaporator unit on the front side of the HVAC unit in a Peterbilt 379. Its main function is to regulate the flow of refrigerant within the system by providing a restriction in the flow path. The orifice tube helps maintain an ideal temperature throughout the vehicle by allowing only a certain amount of refrigerant to pass through at any given time.

Effects Of A Faulty Orifice Tube On Peterbilt 379

If an orifice tube becomes faulty, it can cause several issues within a vehicles refrigeration system. One of the most common issues associated with a faulty orifice tube is a lack of refrigerant flow, which can cause the compressor not to work properly. Other symptoms of a faulty orifice tube include decreased cooling capacity, strange noises from the compressor, and an inability to maintain desired temperatures within the cabin.

How To Replace An Orifice Tube On Peterbilt 379?

If an orifice tube needs to be replaced on a Peterbilt 379, there are several steps that must be taken in order to ensure that it is done properly and safely. First, locate and remove the old orifice tube and then mount the new one in its place. To do this, you will need tools such as spanner wrenches and hex socket wrenches in order to properly secure the new tube in place. After that, reassemble all components of your vehicles refrigeration system so that they are securely fastened and working correctly before testing out your newly installed orifice tube.

Tools Needed To Replace An Orifice Tube On Peterbilt 379

In order to replace an orifice tube on a Peterbilt 379, you will need specific tools such as spanner wrenches and hex socket wrenches in order to properly secure it into place. Additionally, other tools may be needed depending on what other components need to be removed during installation such as screws, bolts, and clips if any were used for securing other components within your vehicles refrigeration system. Having these tools available when replacing an orifice tube will help ensure that it is done correctly and safely without any further issues arising from its installation process.

Preparing The Vehicle For Replacing The Orifice Tube On Peterbilt 379

Before starting any repair work, it is important to properly prepare the vehicle for replacing the orifice tube on a Peterbilt 379. This involves removing any necessary parts from the HVAC unit and checking the system pressure. It is also important to take accurate measurements of the orifice tube, so that the correct type and size can be determined before proceeding with the repair.

Installing The New Orifice Tube On Peterbilt 379

Once the correct type and size of orifice tube has been determined, it is time to begin installing it on a Peterbilt 379. This involves carefully lining up both shafts inside the HVAC unit and then securely tightening all bolts on both shafts. If done correctly, this should ensure that the new orifice tube is firmly in place and ready for testing.

Testing The System After Replacing The Orifice Tube On Peterbilt 379

Once the new orifice tube has been securely installed, it is important to test the system to make sure that it functions properly. This can be done by checking for proper airflow throughout all vents in the vehicle, as well as by inspecting any other components such as filters and hoses for signs of leakage or wear. If all tests come back positive, then it can be assumed that the new orifice tube has been successfully installed on a Peterbilt 379.

FAQ & Answers

Q: What is an orifice tube in Peterbilt 379?
A: An orifice tube is a part of a refrigeration system that regulates the flow of the refrigerant. It is composed of two tubes, one for the inlet and one for the outlet, and has a small hole in between. This hole controls how much refrigerant can flow through at any given time.

Q: Where is the orifice tube located on Peterbilt 379?
A: The orifice tube is located on the front side of the HVAC unit, behind the evaporator unit.

Q: What are the effects of a faulty orifice tube on Peterbilt 379?
A: A faulty orifice tube can lead to a lack of adequate refrigerant flow and cause the compressor to not work properly.

Q: How to replace an orifice tube on Peterbilt 379?
A: To replace an orifice tube, first take out the old one and then mount a new one in place. Necessary tools include a spanner wrench and hex socket wrench. Before starting repair work, prepare the vehicle by removing necessary parts from HVAC unit and checking system pressure. Make sure to know correct type and size for replacing orifice tube before starting repair work as well as proper measurement for right type and size.

Q: What happens after replacing an orifice tube on Peterbilt 379?
A: After replacing an orifice tube, make sure to line up shafts inside HVAC unit and tighten bolts securely before testing out system performance.

The orifice tube on a Peterbilt 379 is located in the liquid line, behind the evaporator. It can be accessed by removing the rear kick panel and then tracing the liquid line. The orifice tube filters and regulates the flow of refrigerant to ensure optimal performance of the A/C system.