Mosquito™ Assembly/Disassembly Instructions

In addition to its many performance benefits, the Mosquito™ hotend is a modular design that is relatively simple to assemble and disassemble with the included tools. The steps outlined below will guide you through the assembly and disassembly steps for The Mosquito® Hotend, The Mosquito® Hotend - 2.85 mm, and the Mosquito® Magnum Hotend.

Disassembly

Tools needed:

2. Hex keys (included with hotend purchase)
   
3. 9mm deep hex socket & wrench (not included)
   

1. Locate the 1.27 mm hex key (the smallest one) that was included in the Mosquito™ packaging (see Figure 1). Replacement wrenches can be purchased as set here: Hotend Wrench Set

Figure 1. Hex Keys Included with Mosquito™

2. Use the 1.27 mm hex key to remove the M1.4 socket head cap screws in the bottom of the hot block (Figure 2). 
   

           Figure 2. Bottom Face of Hot Block

3. Once the M1.4 screws are removed, the hot block and heat sink will slide apart with little effort. Collect the stand-off tubes and M1.4 screws to ensure they are not damaged or misplaced. If parts are damaged, replacements can be purchased as kit here: Hot Block Hardware. If switching to new M1.4 screws, it may be necessary to clear the red thread locker from the heat sink threads with an M1.4x0.3 tap.

        Figure 3. Heat sink                                                       Figure 4. Stand-off tubes and M1.4 screws

4. The hot block and heat break can be separated using a 9 mm deep hex socket for the Mosquito® Magnum Hotend and The Mosquito® Hotend. The Mosquito® Hotend - 2.85 mm requires a 9 mm open end wrench as a socket will not fit over the fins on the heat break. Place the socket over the heat break, snug against the copper bushing on the distal end. If disassembling The Mosquito® Hotend - 2.85 mm, seat the bushing of the heat break snugly into the open end wrench. Remove the heat break by applying a counterclockwise torque. 
   

           Figure 5. Hot Block and Heat Break

Warning: If disassembling a Mosquito Magnum, carefully remove the Heat Break Insulator from the heat break bushing by sliding the Heat Break Insulator over the heat break fins/break. Please note, the Heat Break Insulator is extremely fragile, and care must be taken when handling it. More information on this can be found here.

 Mosquito Hotend Assembly

Tools needed:

6. Hex keys
   
7. 9mm deep hex socket & wrench
   
8. Boron Nitride Paste
   
9. Red thread locker (such as Red Loctite)
   

2. Use the 9 mm deep hex socket & wrench to thread the heat break into the hot block. If assembling The Mosquito® Hotend - 2.85 mm, seat the bushing of the heat break snugly into an open end wrench. The heat break should be torqued down to approximately 4 Nm. 
   

Warning: If reassembling a Mosquito Magnum, carefully attach the Heat Break Insulator to the heat break by sliding the Heat Break Insulator over the heat break fins/break and onto the heat break bushing. Please note, the Heat Break Insulator is extremely fragile, and care must be taken when handling it.

The insulator is machined to slide on and off the heat break bushing with ease, so you should not have to apply force to the insulator during the process. A light touch is all it takes! However, as there are occasionally slight variations in diameter, you may find that the insulator does not slide as easily as we describe. In this case, we recommend gently rotating the insulator as you guide it down to meet the bushing of the heat break.

You should not use any tools in an attempt to install or remove the insulator. If you are in a situation where you believe tools are necessary, please reach out to Slice support before doing so to be sure we do not have an alternate solution.

More information on this can be found here.

3. Insert the stand-off tubes into the hot block. 
   

4. Carefully align the heat sink with the 4 stand-off tubes and the heat break tube. Slide the heat sink down until it is fully seated against the tubes and heat break. If heat sink is not properly aligned, it will damage the heat break when tightened down. 
   

5. After carefully aligning and fully seating the heat sink onto the hot block stand-off tubes and heat break, coat the ends of the M1.4 socket head cap screws with a red thread locker. Application of thread locker is only necessary if screws were purchased without thread locker on them or if coating has visibly worn away. 
   

6. Insert the M1.4 socket head cap screws into the bottom of the hot block. Use the 1.27 mm hex key to tighten down the screws to “finger tight”. 
   

Warning: Do not overtighten the M1.4 screws, as the threads can be damaged, or the heads stripped out, potentially damaging your hotend.

7. Give yourself a pat on the back and break out a cold drink. You have successfully re-assembled your Mosquito® hotend. 
   

For more information please refer to www.sliceengineering.com