Specifications

TM 05539-IN
0006 00-1
TROUBLESHOOTING PROCEDURES 0006 00
GENERAL
Table 1 lists possible malfunctions, tests or inspections, and corrective action for troubleshooting the M40A3/A5 Sniper
Rifle at the Organizational and Intermediate Maintenance level.
Table 1. Organizational and Intermediate Troubleshooting Chart.
MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION
1. Magazine Inserts
with Difficulty.
1. Check for bent or deformed magazine. Replace magazine.
2. Check for excessive dirt in receiver well or in
magazine.
Clean and lubricate receiver well and
magazine. Refer to TM 05539-OR_.
3. Check for ammunition not fully seated in
magazine.
Remove ammunition and reload properly.
Refer to TM 05539-OR_.
2. Magazine Cannot
be Retained in
Weapon.
1. Check for magazine not fully seated. Remove and install magazine properly.
Ensure the latch clicks.
2. Check for magazine damaged or deformed. Replace magazine.
3. Check for deformed locking recess at top
front of magazine.
Replace magazine.
3. Failure to Feed
(Bolt Moves
Forward Without
Feeding
Cartridge).
1. Check for magazine improperly loaded.
2. Check for weak or broken magazine spring.
3. Check for defective/dirty magazine.
4. Check for damaged or dirty ammunition.
Re-insert ammunition properly. Refer to TM
05539-OR_.
Replace magazine.
Clean or replace magazine as necessary.
Clean or replace ammunition. Refer to
TM 05539-OR_.
4. Bolt Fails to Lock. 1. Check for ammunition not seated in chamber
properly.
Ensure ammunition is seated fully into
chamber.
2. Check for dirty breech/chamber. Clean breech/chamber as necessary. Refer to
TM 05539-OR_.
3. Check for defective extractor. Replace defective extractor. Refer to
WP 0013 00.
4. Check for damaged/dirty bolt assembly. Clean and lubricate or repair bolt assembly as
necessary. Refer to TM 05539-OR_.
5. Check for damaged receiver. Evacuate to higher level of maintenance.
6. Check for defective ejector. Evacuate to higher level of maintenance.
7. Check for damaged/defective bolt. Evacuate to higher level of maintenance.
2