Overview – AIR BALANCE TUBE 4017508-20
The Cummins AIR BALANCE TUBE 4017508-20 is a direct replacement used in Cummins turbo air balancing and crankcase ventilation plumbing, with no modification required at installation.
Parts Characteristics
A formed steel air balance tube with flanged ends that equalises pressure between two points in the induction or crankcase system. Its shape is specific to the engine layout, and a cracked or dented tube lets unmetered air into the system and upsets boost control.
Applicable Models & Applications
Fitted to the corresponding Cummins air-balance routing. Match the tube shape, flange pattern and length against your old part – balance tubes are rarely interchangeable between engine families.
Maintenance & Replacement
Inspect the tube and its joints for cracks, especially around the welded seams and flange faces, and for loose or missing clamps. An air balance leak is an unmetered-air leak, and it shows up as erratic boost and a fault code rather than an obvious hiss.
Replace the gaskets or seals at both flanges whenever the tube is removed. Reusing a crushed gasket is the usual reason a freshly refitted tube still leaks, and the leak is harder to find the second time.
Torque the flange bolts evenly in the sequence the manual gives. A tube pulled up on one side distorts the flange face and the new gasket cannot seal, so the joint weeps air under load.
Keep one spare balance tube for the engines you run most. They are awkward to fabricate on site and a bent one is easy to overlook until the boost trace tells the story.
Price Reference (USD)
As a reference, the AIR BALANCE TUBE 4017508-20 is typically priced between USD 20 and USD 60 depending on configuration, lot size, and current exchange rates.
Value & Service
We supply brand-new air balance tubes with the flange and length confirmed against your engine, so boost control stays where the calibration expects it.
Racer Machinery helps you standardize Cummins Hydraulic Parts procurement; the AIR BALANCE TUBE 4017508-20 can be set up as a repeat order for predictable servicing.
