Long-range tractors Volvo FH 12 are often equipped with additional equipment for a comfortable rest for the driver, and one of the most important units is a built-in refrigerator. The need to dismantle it may arise for various reasons: from the failure of the compressor to the desire to free up space in the cabin or replace the device with a more modern model. Removal process requires care, since the equipment is built into the furniture set and connected to the vehicle's electrical network.
Before before starting work, it is important to understand that depending on the year of manufacture of the tractor and the configuration, fastening design may differ. In some modifications this is a built-in unit, in others it is a drawer fixed in a niche. Careful preparation tool and workplace will avoid damage to plastic panels and electrical connectors, which are often fragile after long-term use.
In this article we will analyze in detail all the stages of dismantling, paying special attention to safety precautions and the nuances of wiring connections. Following the sequence This action ensures that after servicing you can easily return the equipment to its place or install a new one. Do not rush to tear off the bolts, first study the structure of the unit.
⚠️ Attention: Before starting any work on electrical equipment Volvo FH 12 be sure to turn off the engine and remove the key from the ignition switch to avoid a short circuit.
Preparation of tools and workplace
The success of the operation directly depends on the quality of preparation. You do not need specialized expensive equipment, but the set should be complete. The main difficulty lies in the limited cabin space, therefore compact tool it will be preferable to bulky analogues. Ensure good lighting of the work area in advance, since fasteners are often located in darkened niches.
For dismantling you will need the following tools:
- 🔧 A set of screwdrivers (phillips and flat) for removing decorative trims.
- 🔩 Set of heads and knobs (sizes 8, 10, 13 mm) for unscrewing bolts.
- ✂️ Pliers or duckbills for working with clamps and clamps.
- 🔦 Powerful flashlight or portable lamp.
- 🧤 Gloves to protect your hands from sharp metal edges.
It is also recommended to have on hand multimeter to check the voltage before disconnecting the wires if you plan on further diagnostics. Plastic spatulas (pullers) will help you carefully snap off the clips without leaving scratches on the dashboard or furniture. Volvo famous for its ergonomics, but the plastic in older models can be brittle, so proceed without excessive force.
☑️ Preparation for dismantling
Disconnecting the power supply and accessing the node
The first step is to completely de-energize the system. B Volvo FH 12 the refrigerator can be powered from the on-board 24V network through a separate fuse or directly from the batteries through the main power switch. Locate the fuse box, usually located in the side panel of the cab or under the dash on the passenger side. The fuse location diagram is often pasted on the inside of the unit cover.
If there is no separate fuse for the refrigerator or you are not sure which one is responsible for it, the safest option is to disconnect the ground. To do this, open the door and find the main battery switch, usually located on the frame outside or in a special compartment inside the cabin (depending on the modification). No voltage It is critical to avoid sparks when disconnecting the connectors, which can melt the contacts.
After turning off the power, proceed to release access. If the refrigerator is built into a cabinet unit, you may need to remove adjacent shelves or drawers. Often the unit itself is covered with a decorative frame or panel. Carefully pry it around the perimeter with a plastic spatula. Clips they may fit tightly, especially if they have not been opened for a long time. Movements should be confident, but smooth.
Removing fastening elements
After removing the decorative elements, the body of the refrigeration unit itself will open to your attention. It is fixed in the niche using metal corners, bolts or guide slides. In Volvo FH 12 most often a combined fastening method is used: on the bottom of the slide, and on top or on the sides - fixing bolts to prevent vibration during movement.
Carefully inspect the perimeter of the device. The fasteners may be hidden under rubber plugs or stickers.
- 🔍 Check the bottom for bolts holding the base.
- 🔍 Inspect the side walls of the niche for hidden screws.
- 🔍 Make sure the device is not secured with straps or additional ties.
Use a socket of the appropriate size (usually 10 mm) to loosen the bolts. If the thread has become “stuck” due to vibration and temperature changes, do not use excessive force right away - try gently tapping the bolt or using a penetrating lubricant (WD-40 or equivalent), waiting 5-10 minutes. Torn off thread or a broken bolt will add extra work for you to drill out the remains.
⚠️ Attention: When unscrewing the fasteners, hold the refrigerator with your second hand or ask an assistant. Once the last bolts are removed, it may suddenly move out or fall, damaging the cab floor or your legs.
Disconnecting wiring and communications
When the mechanical fasteners are loosened, you can carefully slide the unit out enough to access the rear panel. This is where the electrical connector and, in some models, the heat or refrigerant removal system tubes are located (although in automotive compressor models the circuit is usually sealed). The main focus is on the electrical connector.
Connectors in trucks Volvo usually have a secure fit. Locate the latch or retaining ring on the chip body. Press the latch and smoothly pull the connector towards you. Do not pull on the wires themselves - this will cause them to break at the base of the contacts. If the connector does not fit, check whether you forgot to unclip the additional safety mechanism.
The table below shows the main types of connections that may be encountered during dismantling:
| Connection type | Description | Disconnection method |
|---|---|---|
| ISO plug | Standard snap connector | Press the tab and pull |
| Terminal block | Screw terminals under the cover | Unscrew the screws with a screwdriver |
| Soldering | Direct connection of wires (rarely) | Cut and twist for insulation |
If you are removing the refrigerator completely, insulate the bare ends car wires with electrical tape or heat shrink to prevent oxidation and short circuit in the future. Tightness insulation is important in conditions of high humidity and vibration.
What to do if the connector is oxidized?
If the contacts are inside The connectors are covered with a green oxide coating, do not connect a new device right away. Clean the contacts with a special contact cleaner spray or carefully walk with fine sandpaper, then blow with compressed air.
Removing the unit from the niche
This is the final and most physically expensive stage. Truck refrigerators, even compact ones, are heavy due to the compressor and insulation. In Volvo FH 12 the niche may be deep, and the unit may get stuck due to a tight fit or uneven floor.
Gently pull the device towards you. If it is tight, check to see if any wires or hoses are caught on the edges of the furniture. Sometimes rugs or objects that have fallen behind the closet get in the way. Move the unit smoothly, without jerking. If a skid system is used, make sure that they are not deformed.
After removal, inspect the niche. Dust, crumbs or condensation may accumulate there. Cleaning the cavity before installing new equipment or returning old equipment will extend its service life. Check the condition of the cabin floor under the refrigerator - there are no signs of corrosion or damage to the wiring laid under the floor.
Typical errors and precautions
When performing work, beginners often make mistakes that can lead to additional expenses. One of the most common is an attempt to remove the unit without completely disconnecting all the fasteners. Hidden bolt This can cause a breakage of the case or a torn piece of furniture when jerked.
Another mistake is neglecting the insulation of the wires. Left hanging “snot” wires can get into moving mechanisms (if the removal is partial) or cause the batteries to discharge while parked. Electrical system Volvo is sensitive to power surges and short circuits.
Also, do not ignore the condition of the seals. When re-installing (or installing a new refrigerator in the same niche), check whether the housing is pressing on the sealing rubber, which may disrupt the seal of the chamber. Correct fit ensures efficient operation of the compressor.
Frequently asked questions (FAQ)
Is it possible to remove the refrigerator on a Volvo FH 12 alone?
Technically, this is possible if the unit is small in volume (up to 30 liters) and you have sufficient physical strength. However, given the cramped cabin and the weight of the device, it is strongly recommended to work with an assistant so as not to drop the refrigerator and damage the interior.
Does it need to drain the freon before removal?
No, in compressor-type car refrigerators the circuit is sealed and does not require draining the refrigerant during dismantling, unless you plan to repair the refrigeration system itself with flaring of tubes. You remove the device as a single unit.
What tool is needed to remove bolts in a niche?
Most often, standard 8, 10 or 13 mm sockets are used. However, some modifications of Volvo furniture may contain star screws (Torx), so it is advisable to have a set of T20-T30 bits.
What to do if the refrigerator stops working after removal?
If the problem arose after dismantling and reinstallation, most likely the contact in the electrical connector is broken or the wire is broken. Check the continuity of the circuit with a multimeter and make sure that the connector is latched until a characteristic click is heard.