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Heckler And Koch HK UMP45, UMP40 Operators Manual

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    							21
    LOADING THE SUBMACHINE GUN
    Starting Situation 2: There is an empty magazine in the weapon.  
    The bolt is held back by the bolt catch.
    • Put the UMP on  (Safe).
    • Push magazine catch forward and remove empty magazine.
    • Insert the filled magazine into the magazine well until the magazine
    catch engages audibly. Tug to check.
    • Depress upper end of bolt catch (Fig. 25), thus releasing the bolt and
    allowing it to snap forwards. 
    • The UMP is now fully loaded and with the safety on.
    FIg. 25  Depress bolt catch to release the bolt  
    						
    							22
    FORWARD ASSIST
    With heavy external fouling of the UMP, (sand, sludge) or to load the
    weapon quietly, the thumb recess on the bolt may be used as a forward
    assist (Fig 25A). To do so use the thumb recess, push bolt forwards
    until it is in the forward most position.
    FIg. 25A Forward Assist  
    						
    							23
    STORAGE OF THE WEAPON
    1. Store the weapon clean and lubricated.
    2. Store the weapon without a round in the chamber.
    3. Store the weapon with the cocking lever forward and the hammer
    down (at rest).
    4. After no more than twelve (12) months unload all loaded magazines
    and replace the ammunition with fresh ammunition.
    5. Clean and lubricate the weapon and magazines every twelve (12)
    months while in storage.
    6. Store the weapon is a clean, dry environment with regulated
    temperature controls. 
    						
    							24
    UMP SUBMACHINE GUN
    Disassembly of the UMP
    NOTE: The UMP is disassembled and reassembled without the use
    of tools. The use of force is prohibited. The user of this weapon is
    not allowed to disassemble the weapon beyond that which is
    covered in this operators manual. Such disassembly may only be
    carried out by qualified maintenance personnel. 
    Safety check 
    • Put the UMP on “Safe”.
    • Remove the magazine.
    • Pull cocking lever backwards as far as it will go and engage it in the
    indent in the cocking lever.
    • Check to make sure the cartridge chamber is empty. 
    •  Swivel cocking lever downward and allow the bolt to move forward. 
    Disassembly into assembly groups 
    • Detach carrying sling. 
    • Unfold buttstock.
    • Pull out buttstock locking pin and store in the hole on the buttstock.
    • Swivel lower receiver downward and detach (Fig. 26).
    Fig. 26  Detaching lower receiver
    CAUTION: When detaching the UMP lower receiver during
    disassembly, ensure the lower receiver does not rotate more than
    80° around the axis where the attachment lugs hook on to the
    support bolts. Doing so will severely damage the attachment lugs.
    attachment lugs
    support bolts 
    						
    							25
    DISASSEMBLY
    • Fold buttstock. 
    • Pull back cocking lever and remove recoil spring assembly with bolt to
    the rear (Fig. 27).
    Fig. 27 Removing recoil spring assembly with bolt  
    						
    							26
    UMP SUBMACHINE GUN
    Disassembly of the Bolt 
    • Push and hold firing pin forward.
    • Pull out firing pin retaining pin to the left (Fig. 28). 
    •  Remove firing pin and firing pin spring to the rear. To do this, push
    locking catch to the right (Fig. 29).  With your thumb prevent the firing
    pin with firing pin spring from springing out. 
    Fig. 28                                       Fig. 29
    Pull out firing pin retaining pin    Push locking catch to the right
    WARNING: Never disassemble the firing pin. It is possible to
    assemble the firing pin assembly incorrectly and in doing so,
    disabling the UMP firing pin safety. Please contact HK for more
    information.
    Assembly of the Bolt 
    • Place firing pin spring onto firing pin. 
    • Insert firing pin spring and firing pin into the bolt from the rear and
    push them forwards (Fig. 30). 
    • Using any pointed object push firing pin forwards (Fig. 31). 
    • Insert firing pin retaining pin from the left to retain firing pin in the bolt.
    Fig. 30                                       Fig. 31
    Insert firing pin spring            Push firing pin forwards  
    and firing pin 
    locking
    catch 
    						
    							27
    DISASSEMBLY
    Disassembly of the Magazine 
    • Depress locking plate through magazine floor plate and slide
    magazine floor plate to the rear. 
    • Detach magazine floor plate to the rear. 
    • Remove follower spring with locking plate and follower.
    CAUTION: Magazine floor plate is under spring tension. With your
    thumb secure locking plate with follower spring to prevent it from
    springing out. 
    Assembly of Magazine 
    • Insert follower and follower spring with locking plate into the
    magazine housing from below.
    • Fully depress follower spring and locking plate (Fig.29) and slide
    magazine floor plate onto magazine housing from the rear.
    • Push magazine floor plate forwards as far as it will go. 
    • Check that the floorplate is fully seated and secured in place by the
    tab of the locking plate. 
    						
    							28
    UMP SUBMACHINE GUN
    Reassembly of the UMP
    • Fold buttstock. 
    • Insert the bolt and recoil spring assembly to the receiver from the rear.
    • Unfold buttstock. 
    • From below, engage lower receiver (hammer between cocked and
    released positions) into the support bolts on the upper receiver and
    swivel it upwards (Fig. 32).
    • Insert locking pin into the upper receiver to secure lower receiver.
    • Put the UMP on   (Safe). 
    • Insert empty magazine.
    • Carry out a function check as described on page 30 (cock, check bolt
    catch function, set safety/selector lever on “Fire”, pull trigger, set
    safety/selector lever to “Safe”). 
    • Attach carrying sling (Fig. 33).
    Fig. 32                                            Fig. 33
    Engage lower receiver                     Attaching carrying sling
    support bolts 
    						
    							29
    FUNCTION CHECK
    NOTE: A Function Check should be performed anytime the weapon
    is reassembled. This quick check indicates whether or not the
    weapon has been properly assembled and/or assembled with all
    components. A properly executed Function Check can also reveal
    many of the more obvious malfunctions that could occur between
    the interactive components of the weapon. ALWAYS clear the
    weapon before performing the Function Check! ENSURE the
    weapon is clear!
    1. Clear the weapon.
    2. Place the cocking lever and bolt group in the forward position.
    3. With the weapon on “Safe”, pull the trigger. Hammer should not fall.
    4. Place the weapon on “Semi-automatic”. Pull the trigger and hold the
    trigger back. Hammer should fall.
    5. Still holding the trigger back, recock the weapon. Release the trigger.
    Listen for the “click” of the trigger and sear resetting. Pull the trigger.
    Hammer should fall.
    6. Place the weapon on “Burst”, if applicable. Recock the weapon. Pull
    the trigger and hold the trigger back. Hammer should fall.
    7. Still holding the trigger back, recock the weapon. Release the trigger.
    You should not hear the hammer fall. (The hammer should already be
    forward).
    8. Place the weapon on “Fully-automatic”, if applicable. Recock the
    weapon. Pull the trigger and hold the trigger back. Hammer should
    fall.
    9. Still holding the trigger back, recock the weapon. Release the trigger.
    You should not hear the hammer fall. (Again, the hammer should
    already be forward).
    The Function Check is now complete. 
    						
    							30
    UMP SUBMACHINE GUN
    Operator Cleaning
    • The functional performance of any mechanical device varies greatly
    on the quality and frequency of the maintenance performed on that
    item. Firearms are no exception. The operator spends most of the
    time with the weapon and therefore has the best opportunity to
    perform the necessary upkeep required to insure top performance at
    all times.
    • Metal components of new UMPs are coated in a thick, oily
    preservative that should be removed prior to the weapon being used
    or fired. This preservative oil, applied by HK personnel prior to the
    shipment of the weapons from the manufacturing facility in Germany,
    guarantees that the weapons and accessories will remain corrosion-
    free during storage and transport. However, this preservative fluid is
    not considered a lubricant and therefore should be removed and
    replaced with a high-quality weapons lubricant whenever possible.
    This preservative fluid attracts debris and dirt and possesses little or
    no lubrication qualities.
    • Cleaning the UMP, especially with its polymer construction, need not
    take hours and a great deal of effort. With the right equipment a very
    fouled UMP should be able to be thoroughly cleaned in less than 10
    minutes. A solvent tank where the parts can be immersed in and
    scrubbed will save a great deal of time and effort as will compressed
    air to blow off the fouling and solvent or to spread the lubricant. There
    are companies, such as Safety-Kleen, that sell or rent such solvent
    tanks and will exchange the solvent on a regular basis at a
    reasonable price.
    NOTE: If using Ultra Sonic-type cleaning machines, do not immense
    the painted portion of the UMP, specifically the color pictogram firing
    mode markings on the lower receiver. Ultra sonic cleaning will
    remove the markings! 
    • If such a set up is not available to you, a complete weapons cleaning
    kit specially designed for the HK UMP will reduce your cleaning time
    and make the job easier.
    • Any quality weapons solvent or oil can be used to clean the UMP.
    Basically, if it’s safe to put your bare hands into it won’t hurt the
    surfaces of the weapon. Break-Free (CLP), Ballistol, Militecor any
    of the other brand-name cleaners or lubricants specifically designed
    for use with weapons will work well on the UMP.
    • At HK we recommend two types of operator cleaning. Normal
    cleaning and Major cleaning. 
    						
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