The process of dismantling refrigeration equipment in Scania trucks requires not only physical strength, but also strict adherence to technical regulations. Often, owners are faced with the need to remove the unit for routine maintenance, replace seals, or completely replace the device with a newer model. Incorrect actions can lead to damage to the wiring, loss of sealing of the cooling system, or even injury due to the weight of the structure.
Unlike domestic models, refrigeration units or built-in refrigerators in the cab of a Scania truck have a complex system of fastenings and connections to the on-board network. Before starting work, it is necessary to clearly understand the structure of a particular unit, since in different series of trucks - be it P, G, R or S - the layout may differ significantly. Ignoring these nuances can lead to costly repairs.
In this article we will analyze in detail the algorithm of actions that will allow you to safely and effectively dismantle the device. You will learn how to properly prepare the equipment, disconnect electrical circuits and physically remove the unit from the seat without damaging the interior of the cab or body.
Preparation of the workplace and safety precautions
The first and most important stage is the complete preparation of the truck for work. Safety should come first, since working with electrical equipment and heavy machinery carries certain risks. Before starting any manipulations, make sure that the engine is turned off and the ignition key is removed from the lock. This will eliminate the risk of accidentally starting the fans or compressor during operation.
Organize sufficient lighting in the work area. The truck cab or bed is often dark, and poor visibility can lead to errors when removing bolts or disconnecting connectors. Also prepare the necessary tools: a set of open-end and socket wrenches, screwdrivers with different types of slots, a multimeter to check the voltage and, possibly, plastic pullers for careful dismantling of the cladding.
⚠️ Attention: Before starting work, be sure to disconnect the ground on the battery. This is critical because Scania refrigeration equipment is often powered directly or through additional fuses, and an accidental short circuit can damage the vehicle's control unit.
If the refrigerator is built into a niche or has decorative panels, these must be removed first. Be careful not to break the plastic latches, which become brittle over time. Use a flat-head screwdriver wrapped in a rag to pry up the casing elements.
Draining the refrigerant and draining the system
One of the key points in the question of how to remove a Scania refrigerator is working with internal liquids and gases. Depending on the type of equipment (absorption refrigerator in the cab or compressor unit in the body), the procedure may differ. However, the general rule is that the condensate must be completely defrosted and drained.
Ammonia solutions may be present in absorption models, which are often found in the beds of Scania trucks. Although in modern systems the volumes are small, contact of this substance with the skin or mucous membranes is unacceptable. Compressor units require special attention to the oil in the crankcase if the design provides for draining it before transportation.
- 🧊 Completely defrost the chamber and remove all food.
- 💧 Find the drainage hole and place a container to drain the melt water.
- 🌬️ Leave doors open for several hours to completely evaporate moisture and eliminate odor.
- 🧤 Use protective gloves and goggles when working with technical liquids.
It is important to understand that refrigerant is in a closed circuit under pressure. Independent release of freon into the atmosphere is prohibited by environmental regulations and is technically dangerous without special equipment. If your goal is to repair the compressor or replace pipes, this operation must be carried out by licensed specialists. For normal dismantling of the housing, it is enough to make sure that the system is not under active pressure, which can disrupt the connections when unscrewing.
What to do if the liquid does not drain?
If the drain hole is clogged with ice or debris, do not try to pierce it with metal objects - you can damage the tube. Use warm (not boiling water!) water or a hair dryer at minimum power to defrost the plug.
Disconnecting the electrical circuit
The electrical part of Scania refrigerators is the most vulnerable if improperly dismantled. The voltage of the truck's on-board network is 24 volts, which already poses a danger in the event of a short circuit. Before touching the wires, you need to find a connection diagram for a specific node. It can be located on a sticker inside the refrigerator compartment or in the technical data sheet of the car.
Usually the connection is made through a special connector located at the back of the unit or at the bottom of the niche. Some Scania models require removal of the rear metal cover to access the terminal block. Be careful: the wires may be marked, but the insulation colors fade over time, so it is better to focus on the position of the contacts.
To perform the task efficiently, use a multimeter. Make sure that there is no voltage on the contacts after disconnecting the fuse. This will help avoid sparking and damage to the contact group. It is also worth checking the condition of the wires themselves: if the insulation is cracked, during dismantling you can accidentally short-circuit the wires.
| Wire type | Color (standard) | Function | Voltage |
|---|---|---|---|
| Power | Red / Brown | Current supply from battery | 24 V |
| Grounding | Black / White | Weight (body) | 0 V |
| Control | Blue / Green | Signal from panel | 12-24 V |
| Ventilation | Yellow | Fan power supply | 24 V |
After disconnecting all connectors, it is recommended to immediately insulate the bare ends of the wires on the side of the car to prevent accidental short circuit during further work. Insulation must be reliable, since vibration of the truck during subsequent operation can weaken the contact or cause a short circuit if the wires are left dangling.
Removing fasteners
Physically removing the Scania refrigerator is a step that requires care. The units are attached to the cab or body frame using bolted joints, which can be tightened with force and covered with a layer of dirt or rust. Before unscrewing, it is recommended to treat the threaded connections with a penetrating lubricant (for example, WD-40) and give it time to work.
The fasteners are usually located around the perimeter of the device: two bolts on top, two on the bottom and fixing elements on the sides. Some Scania models use special slides that allow the refrigerator to be pulled out for servicing. If the slide is jammed, do not use excessive force - check to see if any locking screw remains unscrewed.
☑️ Check before removing the fasteners
When unscrewing the bolts, hold the refrigerator body. Even small models can weigh 15-20 kg, and falling them can damage the cabin floor or break internal components. If the refrigerator is built into a cabinet panel, you may need to remove the side walls of the cabinet to access hidden bolts.
Pay special attention to the sealing tape. Often vibration-proofing material or sealant is glued around the perimeter of the planting. A sharp jerk can damage the cabin wall lining. Carefully trim the layer of sealant with a knife if it interferes with the free movement of the device.
Removing the unit and transporting
After all the fasteners have been loosened, the most crucial moment comes - removing the device. For large Scania refrigerators located in the sleeping compartment, one person may not be enough. Weight including the compressor and metal casing can reach 30-40 kg or more.
Remove the unit smoothly, without jerking. Be careful not to snag any remaining wires or hoses if they are running nearby in cable ducts. If the refrigerator has a pull-out mechanism, make sure it is completely clear of the guides before lifting it.
- 🚛 Use a dolly to transport heavy items if dismantling is taking place in the garage.
- 🤝 Use a second person to secure and support the weight.
- 📦 Prepare a place for temporary storage of removed equipment.
- 🧹 Immediately remove tools and debris from the work area.
When transporting a removed refrigerator, follow the rule: Compressor models should not be placed on their side or turned upside down. This may cause oil to leak from the compressor into the cooling circuit, causing damage the next time it is started. It should be transported strictly in a vertical position.
Frequent errors during dismantling
Many Scania truck owners make typical mistakes when trying to save time on dismantling. One of the most common is an attempt to remove the refrigerator without completely turning off the electrical system. This can lead to blown fuses or damage to the electronic temperature control module.
Another mistake is ignoring the condition of the fastener. Rusty bolts can break inside the threads, and then drilling them out will take much longer than careful preparation. Condensation is also often forgotten, and when the device is tilted, water flows into the cabin trim, causing corrosion and mold.
⚠️ Attention: Do not use open flames (gas burners) to warm frozen fasteners in the immediate vicinity of plastic elements of the Scania interior. This may lead to melting of the interior or fire.
Try to act methodically, checking the instructions. If you feel that the knot is not giving in, do not force things. There may be a hidden fastener that you overlooked. A careful inspection and understanding of the design is the key to successful completion of the work.
Questions and answers (FAQ)
Can a Scania refrigerator be removed by one person?
Technically possible if the model is small-sized (for example, a minibar in the cabin). However, for full-fledged refrigeration units or large built-in models, the assistance of a second person is strongly recommended due to the large weight and dimensions in order to avoid injuries and damage to the equipment.
Do you need to wait after installing the refrigerator before turning it on?
Yes, if the refrigerator was transported lying down or was strongly tilted during dismantling/installation, it is necessary to let it stand in an upright position for a minimum 2-4 hours. This is necessary for the oil to drain into the compressor.
What to do if the fuse burns out after removal?
Replace the fuse with a similar one. If it burns again immediately after switching on, then there is a short circuit in the circuit. It is necessary to check the integrity of the wires and the condition of the connection connector.
How to preserve the refrigerator if it will not be used for a long time?
After dismantling or disconnecting, thoroughly wash and dry the chamber. Leave doors ajar to prevent mold and odors. It is better to store the device in a dry room.