Ingersoll-Rand ST900 Series User Manual (English)

Questions and Answers:

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jeanette86Aug 14, 2025
What to do if the Ingersoll-Rand ST900 motor will not run?
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  Christina JohnsonAug 14, 2025
  If the Ingersoll-Rand Controller motor won't run, start by checking for blockages or damage in the air supply lines or tank. Inspect the motor assembly and power train, repairing or replacing parts as needed. Clear any foreign material from the motor or piping. Ensure the exhaust system isn't blocked by removing the housing exhaust cover and checking for obstructions. If these steps don't resolve the issue, the control valve or relay valve may be defective and require replacement.
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Robert RayAug 17, 2025
Why is my Ingersoll-Rand Controller losing power?
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  Alexis LawsonAug 17, 2025
  If you're experiencing a loss of power in your Ingersoll-Rand Controller, begin by checking the air supply to the starter. Look for any blockages or damage to the air lines that might be restricting the air supply. Inspect the relay valve for malfunctions, cleaning or replacing lines or the valve itself, and lubricating the relay valve. Ensure there are no obstructions in the exhaust flow, such as blocked or damaged piping, dirt, foreign material, or ice build-up; clean or replace the piping and remove any obstructions. If the issue persists, the motor assembly may be damaged and require replacement.
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Brett ChanAug 20, 2025
Why is oil blowing out of the exhaust of my Ingersoll-Rand ST900?
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  Amy EvansAug 20, 2025
  If oil is blowing out of the exhaust of your Ingersoll-Rand Controller, inspect the air line and remove the source of the oil. Check for a missing splash deflector retaining screw or pipe plug and install it if necessary. If the issue persists, the rotor seals or static O-rings may be worn or damaged, requiring replacement of the static seals on the outside of the motor, or consider sending the motor to Ingersoll Rand for rebuilding.
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Kathryn WilliamsAug 25, 2025
What to do if the drive will not engage on my Ingersoll-Rand Controller?
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  lisa85Aug 25, 2025
  If the drive on your Ingersoll-Rand Controller will not engage, check for any foreign material obstructing the starter drive and remove it. Inspect the drive components for damage or wear and replace them as necessary.
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johnrichardsAug 27, 2025
Why won't the drive engage on my Ingersoll-Rand Controller?
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  Ariel WilliamsAug 27, 2025
  If the drive on your Ingersoll-Rand Controller will not engage, ensure there is pressure to the drive housing port by checking the air supply. Remove any blockages from the internal drive housing ports. Eliminate any fluid present in the drive unit components. Replace any damaged or worn piston assembly, O-rings, or seals. If the O-rings and seals are dry, re-lubricate them.
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katrinamataAug 30, 2025
Why is oil leaking from the gear case of my Ingersoll-Rand ST900?
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  Melissa FriedmanAug 30, 2025
  If oil is leaking from the gear case of your Ingersoll-Rand Controller, replace any worn or damaged O-rings. Ensure joints fit properly and that the starter assembly cap screws are tightened to 60 ft-lb (81 Nm), and that all seals and O-rings fit and seal properly at their perimeters, replacing them if necessary. Operate the equipment according to recommendations to avoid excessive high-speed operation. Replace worn components if there's a high number of start cycles. Tighten or replace loose or leaking pipe plugs using Ingersoll Rand SMB-441 Pipe Sealant. Tighten the splash deflector retaining screw or replace the pipe plug if missing.
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katherine16Sep 3, 2025
Why is my Ingersoll-Rand ST900 Controller leaking air or gas?
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  Gary CurtisSep 3, 2025
  If your Ingersoll-Rand Controller has air or gas leakage, ensure that joints fit properly and that starter assembly cap screws are tightened to 60 ft-lb (81 Nm) torque. Make sure all seals and O-rings fit and seal properly at their perimeters; replace them if they do not. Operate according to recommendations to prevent excessive high-speed operation. Replace worn components if there is a high number of start cycles. Tighten or replace loose or leaking pipe plugs. Tighten the splash deflector retaining screw or replace the pipe plug if it is missing.
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Elizabeth SmithSep 6, 2025
What to do if the Ingersoll-Rand ST900 Controller motor runs, pinion engages, but does not rotate flywheel?
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  Mathew ThompsonSep 6, 2025
  If the motor runs and the pinion engages, but does not rotate the flywheel on your Ingersoll-Rand Controller, disassemble the drive train and replace any worn or damaged parts.
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John Chapman MDSep 9, 2025
What causes excessive butt engagement in an Ingersoll-Rand Controller?
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  Shelby Vasquez DVMSep 9, 2025
  If you're experiencing excessive butt engagement with your Ingersoll-Rand Controller, inspect the drive pinion and flywheel, replacing them if necessary. Inspect the drive components and replace any worn or damaged parts. Check the air supply to ensure adequate pressure. If the drive pinion is incorrect, replace it with the proper one.