M1 Garand Stoppage/Malfunction, Cause, Action/Remedy - Based on US Army FM 23-5, TM 9-1005-222-35 & TM 9-1275
|
Stoppage/Malfunction |
Probable Cause |
Action/Remedy |
|
Failure to feed ammunition. |
• Lack of lubrication of operating parts. • Defective or worn parts. • Short recoil. |
• Clean and lubricate parts. • Replace parts. • See 'short recoil' under stoppage/malfunction list. |
|
Failure to chamber ammunition. |
• Lack of lubrication of operating parts. • Dirty chamber. • Defective ammunition. |
• Clean and lubricate parts. • Clean chamber. • Replace ammunition. |
|
Failure to lock bolt. |
• Lack of lubrication of operating parts. • Dirty chamber. • Dirty locking recesses. • Weak op rod spring. |
• Clean and lubricate parts. • Clean chamber. • Clean recesses. • Replace op rod spring. |
|
Failure to fire ammunition. |
• Defective ammunition. • Defective firing pin. • Defective trigger housing group. |
• Replace ammunition. • Replace firing pin. • Repair trigger housing group. |
|
Failure to unlock bolt. |
• Dirty chamber. • Lack of lubrication of operating parts. • Insufficient gas. • Follower arm pin worn. • Follower arm bent or out of tolerance. |
• Clean chamber. • Clean and lubricate parts. • Tighten gas cylinder lock screw, and/or clean or replace worn parts. • Replace follower arm pin; verify pin hole diameter. • Replace follower arm. |
|
Failure to extract spent cartridge case. |
• Dirty chamber. • Defective ammunition. • Broken extractor. |
• Clean chamber. • Replace ammunition. • Replace extractor. |
|
Failure to eject cartridge case. |
• Broken ejector or spring. • Short recoil. |
• Replace ejector or spring. • See 'short recoil' under stoppage/malfunction list. |
|
Failure to !+#% hammer. |
• Defective trigger housing group. • Short recoil. |
• Repair trigger-housing group. • See 'short recoil' under stoppage/malfunction list. |
|
Cartridge clip inserts with difficulty. |
• Deformed cartridge clip. • Broken clip ejector. • Interference between bullet guide and follower arm. |
• Replace. • Replace. • Replace bullet guide or follower arm. |
|
Short recoil (op rod does not fully cycle). |
• Undersized or out of round op rod piston. • Oversized gas cylinder. • Undersized barrel at gas port. • Carbon in gas cylinder. • Carbon or foreign matter in gas port of barrel. • Op rod assembly binding. • Leak in gas cylinder lock screw with valve. • Defective op rod spring. • Bolt binding. • Distorted or damaged receiver. |
• Replace op rod assembly. • Replace. • Rebarrel firearm. • Clean. • Clean. • Replace op rod assembly if damaged, or relieve wood from gun stock assembly, where op rod binds on wood. • Replace gas cylinder look screw with valve. • Replace op rod spring. • Remove burs from bolt. • Repair or replace receiver. |
|
Bolt fails to close tightly. |
• Extractor does not open enough to pass over rim of cartridge. • Op rod assembly binding. • Weak or broken op rod spring. • Rust or dirt in chamber. • Damaged cartridge, or frozen ejector. • Damaged/deformed bolt and/or receiver • Insufficient headspace. |
• Clean bolt assembly. • Replace op rod or relieve wood from stock assembly where op rod binds on wood. • Replace op rod spring. • Clean barrel chamber. • Repair or replace ejector. • Replace bolt or receiver. • Replace bolt assembly by selective fit or headspace. |
