What order do the components go in a York compressor on-board air system?

Per the diagram: York compressor (with safety valve) → 3/8 line → oil separator → check valve → air tank → cross fitting, which splits to a manifold with gauge and pressure switch, an accessories/tools outlet, and a pressure regulator feeding the ARB locker solenoids.

What size line feeds the ARB lockers?

The diagram labels the lines from each solenoid to the lockers as '1/4 to ARB line'.

What size is the main air line from the compressor and tank?

3/8 — it is labeled on the line from the compressor to the oil separator and on the line from the air tank to the cross.

Where does the pressure switch and gauge mount?

On a manifold connected to the cross fitting downstream of the air tank; the manifold has a 'Guage' and a 'Pressure Switch'.

How are the ARB lockers controlled in this setup?

Regulated air from the pressure regulator feeds a manifold with two solenoids; each solenoid feeds a 1/4-inch ARB line to an ARB locker.

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On-Board Air System Diagram - York Compressor, Air Tank & ARB Locker Plumbing

Onboard air plumbing schematic with oil separator, air tank, manifolds and ARB lines

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Schematic of an onboard air system showing oil separator, air tank, cross, manifolds and 1/4-inch ARB locker lines.

AI caption February 2009 · Photo 637 of 2788

This document is a hand-drawn pneumatic (on-board air) system schematic, uploaded as one page of a multi-part set for a 1989 Ford Bronco. It shows the air flow path for a York compressor-based on-board air setup used to power ARB air lockers and accessories. The system begins at the York compressor, which feeds through a safety valve and 3/8-inch line to an oil separator, then through a check valve into an air tank. From the air tank, a 3/8 line runs to a cross fitting: one branch goes to a manifold with a gauge and pressure switch, another branch feeds accessories/tools, and a third drops down to a pressure regulator. The regulated output feeds a lower manifold with two solenoids, each of which connects via 1/4-inch line to an ARB line and then to an ARB locker (front and rear). The diagram identifies plumbing sizes (3/8 tank/supply lines, 1/4 ARB locker lines) and component order, letting a reader understand how to plumb compressor, tank, regulator, solenoids, and lockers in a DIY on-board air system. No year, make, model, or part numbers appear in the document itself.

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Frequently asked questions

What order do the components go in a York compressor on-board air system?: Per the diagram: York compressor (with safety valve) → 3/8 line → oil separator → check valve → air tank → cross fitting, which splits to a manifold with gauge and pressure switch, an accessories/tools outlet, and a pressure regulator feeding the ARB locker solenoids.
What size line feeds the ARB lockers?: The diagram labels the lines from each solenoid to the lockers as '1/4 to ARB line'.
What size is the main air line from the compressor and tank?: 3/8 — it is labeled on the line from the compressor to the oil separator and on the line from the air tank to the cross.
Where does the pressure switch and gauge mount?: On a manifold connected to the cross fitting downstream of the air tank; the manifold has a 'Guage' and a 'Pressure Switch'.
How are the ARB lockers controlled in this setup?: Regulated air from the pressure regulator feeds a manifold with two solenoids; each solenoid feeds a 1/4-inch ARB line to an ARB locker.