Minnich A-1CL - User Manual

Questions and Answers

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David LevineAug 17, 2025
How to troubleshoot Minnich A-1CL Drill that does not run?
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  Michael DennisAug 18, 2025
  If the Minnich Drill isn't getting enough air, especially when using multiple drill units, try switching the airline with a drill that's working. If the drill then runs, inspect the air control valve. If the valve is functional, check the drill itself. Ensure the valves on both the air compressor and drill unit are fully open. The compressor should provide 100 SCFM per drill and 110 PSI at the drill manifold when using large drills. Also, verify all fittings are properly connected and not leaking.
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afarrellAug 20, 2025
Why does my Minnich A-1CL Drill run slow?
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  Joseph CollinsAug 20, 2025
  If the Minnich Drill runs slowly or drills ineffectively, and you're using multiple drill units, try turning off one or two drills. If the remaining drills speed up, the issue might be the air compressor. It should have 100 SCFM per drill and 110 PSI at the drill manifold when drilling with large drills.
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Ann SimsAug 22, 2025
What to do if Minnich A-1CL electrical circuit failure?
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  David HuntAug 23, 2025
  If the Minnich Drill does not run, and you suspect a failure in the electrical circuit, check the switches, connections, coils, ground, and voltage. If jump-starting the power unit (like backhoes or graders), verify the amps and voltage supplied to the coils from the battery, as it might be too low.
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Autumn WilliamsAug 25, 2025
How to fix restriction in Minnich A-1CL air line?
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  Donald MartinAug 26, 2025
  If the Minnich Drill runs slowly or drills ineffectively, there might be a restriction in the airline, such as a foreign object or a reduction caused by a reducer fitting. Inspect the air line to resolve the issue.
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Christine LongAug 27, 2025
How to check the drill solenoid valve on Minnich A-1CL Drill?
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  colinrhodesAug 28, 2025
  If the Minnich Drill does not run and you have multi drill units with remote electrical controls, check the drill solenoid valve. You should feel the solenoid move when it's activated. Ensure there's current to the solenoid coil. If there's no movement, replace the solenoid.
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Robert EdwardsAug 30, 2025
How to adjust air pressure for Minnich Drill?
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  Casey LongAug 30, 2025
  If your Minnich Drill runs slowly or drills ineffectively, ensure the air pressure to the cylinder feeding the drill into the concrete is properly adjusted. Excessive pressure can cause the drill to bind, while too little pressure won't feed the drill adequately. Air pressure varies by drill model: Horizontal units with large drills use 22-26 PSI; units with 15lb class drills use 16-20 PSI; vertical units use 5-6 PSI. With correct pressure, the drill steel should have a slight rattle.
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browntiffanySep 2, 2025
What to do if Minnich Drill coupling or hose obstruction?
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  Keith WalshSep 2, 2025
  If the Minnich Drill does not run, check for any obstructions in the coupling or hose. If there is an obstruction, remove it.
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James AndrewsSep 4, 2025
Why is Minnich A-1CL carrier binding?
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  hillrichardSep 4, 2025
  If the Minnich Drill runs slowly or drills ineffectively, it could be due to a mechanical binding of the drill carrier. Ensure the eight bearing pads are correctly adjusted. The square tube that the drill carrier slides on must be free of rust for smooth movement. Also, the drill steel must not be binding in the guide bearing.
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Brendan McmillanSep 7, 2025
What to do if mechanical failure of Minnich Drill?
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  Alison GutierrezSep 7, 2025
  If the Minnich Drill does not run, disassemble the drill and inspect it for damaged parts.
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ukirkSep 9, 2025
Why is Minnich A-1CL not hammering properly?
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  Aaron JenkinsSep 9, 2025
  If the Minnich Drill runs slowly or drills ineffectively, it might be due to using 3 1/4” shank drill steel in a 4 1/4” shank chuck drill. While the drill steel will rotate, it won't allow the drill piston to hammer correctly. Replace it with the correct 4 1/4” drill steel.