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TROUBLE SHOOTING MALFUNCTIONS WITH RECOMMENDED SERVICE PROCEDURES

DISCLAIMER
All services besides general maintenance should be performed by a Glock Inc. certified armorer.

All information provided within these pages is simply for informational use only.  TopGlock.Com or any contributing authors are not responsible for actions that are taken by readers of this information presented in these pages.  Glock Inc is in no way associated with this site nor does it endorse any of the information contained herein.

*The text below is an aid in troubleshooting problems that you may be having.  The actual problem could be a combination of the issues below.  This list is not to be used as a definitive solution to any problems that may occur.

  
OBSERVED PROBLEM PROBABLE CAUSES CORRECTION
FAILURE TO EXTRACT Extractor worn/broken/missing Replace
  Overpowered/underpowered/defective ammunition Change amunition
  Dirt under extraction claw Clean extractor and check function
  Dirty chamber Clean chamber
  Shooting with an unlock wrist Lock shooting hand wrist
FAILURE TO EJECT OR ERRATIC EJECTION (INCLUDING STOVE PIPES Broken or damaged ejector Replace trigger mechanism housing with ejector
  Underpowered ammunition Change ammunition
  Dirty chamber Clean chamber
  Lack of lubrication Lubricate
  Dirty gun Clean
FAILURE TO FEED Magazine not properly inserted Reinsert magazine
  Underpowered ammunition Change ammunition
  Dirty magazine Clean and inspect magazine
  Weak magazine spring Replace if necessary
  Dirty chamber Clean chamber
  Tight extractor Replace or clean as needed
  Shooting with an unlocked wrist Lock wrist
  Deformed magazine Magazine sides or lips deformed - replace magazine
  Weak recoil spring  Replace
SLIDE FAILS TO LOCK OPEN ON LAST ROUND Magazine follower broken Replace follower
  Dirty magazine Clean and inspect magazine
  Weak magazine spring Replace if necessary
  Worn slide stop lever notch Replace if necessary
  Dirty gun Clean
  Needs lubrication Lubricate
  Deformed magazine Magazine sides deformed by attempting to load too many rounds - replace magazine
  Trigger pin inserted too far The trigger pin may be inserted too far to the left. This can cause the spring on the slide top lever to bind. Check to see if the slide stop lever moves freely. If not, press the trigger pin slightly to the right until the slide stop lever moves freely.
  Slide stop lever damaged Inspect and replace if necessary
  Underpowered ammunition Change ammunition
  Shooting with an unlock wrist Lock wrist
FAILURE TO FIRE Slide out of battery (DO NOT FORCE INTO BATTERY) due to:  
  Deformed or defective round Inspect and replace round
  Underpowered ammunition Change ammunition
  Damaged or weak recoil spring Replace recoil spring
  Mating surfaces or barrel, slide and receiver excessively dirty Field strip and clean
  Gun dirty - obstructed chamber Clean chamber
  Shooting with an unlock wrist Lock wrist
NO PRIMER STRIKE Worn or broken firing pin tip Replace
  Obstructed channel Clear
  Spring cups inverted Change
LIGHT CENTERED STRIKE Hard primer Change ammunition
  Obstructed firing pin channel Remove, inspect and clean firing pin and firing pin spring. Clean firing pin channel.
LIGHT OFF CENTERED STRIKE Tight extractor Change
  Dirty gun Clean
  Slide lock reversed or not beveled Replace
INCONSISTANT TRIGGER PULL OR WILL NOT RELEASE Connector loose in housing Replace housing
  Gun excessively dirty Clean
  Wrong trigger bar Replace
  Connector needs lubrication Lubricate
  Trigger bar is bent or damaged Replace trigger bar
LOCKS OPEN EARLY Improper hand position Change grip
  Reverse tension on slide stop lever spring Replace
  Damaged slide stop lever spring Replace
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