What does air dryer do on semi truck?
Air dryers are installed between the air compressor and the “wet tank” on commercial trucks and motor coaches. Their purpose is to filter out water vapor, oil vapor, and other contaminants before they can reach the air tanks and valves. This helps prevent freeze-up during the winter and extends the life of air valves.
How does a semi air system work?
The air brake system on a commercial motor vehicle (CMV), or semi-truck as commonly referred to, uses compressed air to push the brake shoe lining onto the brake drum creating friction to slow the wheel down. The air is pumped through the air brake lines where it eventually reaches the air brake.
What are the fault codes for Volvo air dryer?
Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors.The brake control unit MID136 or the car control unit MID144 may be faulty. FMI 0 High voltage between the power contact 3 and the ground contact 4 on the air dryer connector.
Are there any problems with the Volvo D13?
There are some problems that are common. You will hear about the injector issues that plagued everyone for a while. They issued a new tool that swedges the inj cup at install. Instead of 4 pulls it now has just one. That has all but eliminated the leaking non sealing injector issue. The current weak link is in the head.
What to do if your air dryer has a fault?
FMI 9 Malfunction of the internal memory of the air dryer control unit or incorrectly programmed parameters. Try restarting MID185. perform reprogramming. If the fault persists, replace the air dryer. FMI 10 Parameters in the air dryer control unit are incorrectly programmed.
What should FMI 0 be on Volvo air dryer?
The car is standing still. If the DTC remains active, turn off the ignition, turn off the power from the batteries for at least 30 seconds before taking further action. FMI 0 Battery pressure is above 10 bar.