BainMan
TYF Newbie
- Joined
- Aug 26, 2020
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My question: Why does the T1 Air Ride system use nitrogen in the reservoir, when the compressor uses air from the atmosphere?
From the factory service manual:
The compressor draws air from the atmosphere or reservoir, compresses and dries and supplies it to the Air Suspension Controller. The compressor exhausts air to the atmosphere from the Air Suspension Controller.
Also from the factory service manual when replacing an air shock:
Using CH-52667 Air Spring Inflator and the shop nitrogen tank, fill the automatic level control air supply reservoir to 16 Bar (232 PSI).
Is the nitrogen required when changing out an air shock? Is it more necessary when the entire reservoir was empty and must be refilled? My initial guess as to why nitrogen instead of air is to not put a bunch of wet shop air into the system on initial fill.. Any other reason? Won't most of the nitrogen be expelled within the first few months as the compressor inflates and deflates based on vehicles auto levelling over time?
Background: 2021 Yukon XL Denali - rear sag after sitting. 2.5cm droop after 13 hours. Full droop (4.5cm) noted at 4 days, but was probably sooner, that's just how long we were gone . Passenger side seems is worse. No leaks apparent at compressor/valve after soapy water test. Planning to pull the air shock off and check for leaks at the bladder, but the "boot" makes it difficult, the shock will have to be completely removed, disassembled, and filled with air before it can be tested.. With the nitrogen requirement, trying to determine if I should just let a shop handle it, but not looking forward to turning a $300 parts bill into $1,200(?) parts and labor...
From the factory service manual:
The compressor draws air from the atmosphere or reservoir, compresses and dries and supplies it to the Air Suspension Controller. The compressor exhausts air to the atmosphere from the Air Suspension Controller.
Also from the factory service manual when replacing an air shock:
Using CH-52667 Air Spring Inflator and the shop nitrogen tank, fill the automatic level control air supply reservoir to 16 Bar (232 PSI).
Is the nitrogen required when changing out an air shock? Is it more necessary when the entire reservoir was empty and must be refilled? My initial guess as to why nitrogen instead of air is to not put a bunch of wet shop air into the system on initial fill.. Any other reason? Won't most of the nitrogen be expelled within the first few months as the compressor inflates and deflates based on vehicles auto levelling over time?
Background: 2021 Yukon XL Denali - rear sag after sitting. 2.5cm droop after 13 hours. Full droop (4.5cm) noted at 4 days, but was probably sooner, that's just how long we were gone . Passenger side seems is worse. No leaks apparent at compressor/valve after soapy water test. Planning to pull the air shock off and check for leaks at the bladder, but the "boot" makes it difficult, the shock will have to be completely removed, disassembled, and filled with air before it can be tested.. With the nitrogen requirement, trying to determine if I should just let a shop handle it, but not looking forward to turning a $300 parts bill into $1,200(?) parts and labor...
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