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40
UMP SUBMACHINE GUN
Stoppage Cause Remedy
No cartridge fed by bolt. Magazine not properly Insert magazine properly.
inserted.
Magazine loose Check magazine catch and
notch on magazine. If
required take UMP to
maintenance shop.
Follower spring lame Replace magazine or
follower spring and take to
maintenance shop.
Magazine lips damaged Replace magazine or
magazine housing and
take the damaged one to
maintenance shop
Bolt not fully closed. Cartridge chamber dirty Clean cartridge chamber.
Cartridge not fully fed.
Cartridge damaged Recock
Recoil spring lame Take UMP to maintenance
shop
Improperly cocked Allow cocking lever to snap
forward. On releasing
cocking lever do not ride it
forward.
Bolt does not stay open Magazine spring lame. Replace magazine and
after last shot take damaged one to the
maintenance shop
Catch damaged Take UMP to maintenance
shop.
Magazine stuck in Magazine damaged Replace magazine spring
magazine well and take damaged one to
to the maintenance shop
Magazine catch defective Take UMP to maintenance
shop.