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Pelican Technical Article:

Replacing the Air Conditioner Fan

Mike Holloway

Time:

1 hour1 hr

Tab:

$87 to $462

Talent:

**

Tools:

Phillips Head Screwdriver, 10mm Socket, 10mm Open end wrench

Applicable Models:

Mercedes-Benz R107 (1972-89)

Parts Required:

ACM fan assembly

Hot Tip:

Remove grille

Performance Gain:

Air conditioner will cool better

Complementary Modification:

Wash down air conditioner fins

In order for your air conditioner to work there should be a stream of airflow passing over the condenser fins. The low boiling point of the Freon within the condenser allows the temperature to decrease. The decrease in temperature allows a convection effect, which brings the surrounding air temperature down. The cool air is passed over the system coils and brought through the cabin. The effectiveness is achieved by airflow making the fan a valuable component. The auxiliary fan that helps keep your car at a proper operating temperature is mounted in front of the A/C condenser and can be replaced without removing all of these components. You do not need to "break" the lines to the condenser or discharge the A/C system to perform this work. This article will show you how to replace your fan without opening the A/C lines.

You will need to remove the front grille before starting this job.

Before you do any work on your car it is important that you wear safety glasses, work gloves and dispose of all fluids in a safe manner. Coolant is poisonous and should be treated as such. Animals and small children have been known to die from ingesting coolant. If you have to jack up your car, make sure to use jack stands and chock your wheels as well as applying the parking brake. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability. Always wear eye and hand protection.

After the grille has been removed, the fan is in plain sight.
Figure 1

After the grille has been removed, the fan is in plain sight.

Using a Phillips Head screwdriver, loosen and remove the bracket located in the center.
Figure 2

Using a Phillips Head screwdriver, loosen and remove the bracket located in the center.

Using a 10mm socket, loosen and remove the bolts holding the cross beams.
Figure 3

Using a 10mm socket, loosen and remove the bolts holding the cross beams.

The electrical lines may have a cable tie holding them to the cross beams.
Figure 4

The electrical lines may have a cable tie holding them to the cross beams. These will have to be cut and replaced.

There will be a bolt under the condenser core, which has to be loosened and removed.
Figure 5

There will be a bolt under the condenser core, which has to be loosened and removed. A 10mm wrench must be used.

It is also possible to use the open end of the wrench as well.
Figure 6

It is also possible to use the open end of the wrench as well.

A 10mm socket can be used to loosen the bolts holding the AC condenser.
Figure 7

A 10mm socket can be used to loosen the bolts holding the AC condenser. You may choose to leave the bolts on at the top and remove the bottom ones and shift the AC condenser towards the engine bay. This will allow room to lift the fan assembly forward.

The grille under the front end must be removed as well.
Figure 8

The grille under the front end must be removed as well. This is done with a Phillips head screwdriver.

The 10mm bolts located under the AC condenser will also have to be removed.
Figure 9

The 10mm bolts located under the AC condenser will also have to be removed. All the bolts are the same size. which will reduce the amount of bolt labeling required.

The bolts at the top of the AC condenser only have to be loosened, allowing the AC condenser to swing back.
Figure 10

The bolts at the top of the AC condenser only have to be loosened, allowing the AC condenser to swing back. Be careful not to stress the AC lines.

There is a bolt behind the cross members that has to be removed as well.
Figure 11

There is a bolt behind the cross members that has to be removed as well. Use a 10mm wrench.

There is a 10mm bolt behind the AC condenser unit that also has to be removed.
Figure 12

There is a 10mm bolt behind the AC condenser unit that also has to be removed. Use a 10mm socket to loosen and remove the fastener.

The AC condenser can now swing backwards to allow room to remove the fan assembly.
Figure 13

The AC condenser can now swing backwards to allow room to remove the fan assembly.

There is an electrical lead that has to be unplugged.
Figure 14

There is an electrical lead that has to be unplugged.

After the lead has been unplugged, the fan is ready to be removed.
Figure 15

After the lead has been unplugged, the fan is ready to be removed.

After the fan has been removed, it is now ready to be replaced.
Figure 16

After the fan has been removed, it is now ready to be replaced. Installation is the opposite of removal.



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