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.