SG 552-1 Commando Gearbox Replacement

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• Using a flathead screwdriver, remove the pin holding the hand guard in place.
• To remove this, turn the pin clockwise and push it through at the same time.
• Remove the hand guard.
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• Using a Phillips #1 screwdriver, remove the two 8mm screws above the hand guard on both sides of the gun.
• There should be four total.
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• Turn the gun over so that you are facing the bottom of the gun.
• Using a Phillips #1 screwdriver, remove the following screws:
• Remove the 8mm screw that is located directly underneath the cocking lever.
• Remove the 8mm screw located beside the screw you just removed.
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• Carefully tug on the tip of the gun and pull the barrel and its cover out.
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• Locate the hand grip.
• Using a Phillips #0 screwdriver, remove the two 6mm screws at the bottom of the hand grip.
• Slide the cover off.
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• Pull the motor out of the hand grip.
• Using a Phillips #1 screwdriver, remove the two 5mm screws inside of the hand grip.
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• Locate the pin holding the folding stock in place.
• Using an allen wrench or something small, carefully push the pin out.
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• Using a Phillips #1 screwdriver, remove the 20mm screw behind the folding stock and above the gearbox.
• Remove the cover that was held on by the screw.
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• Using a flathead screwdriver, remove the two 5mm screws beside the safety switch on both sides of the gun.
• Slide off the piece that was held on by those screws.
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• Using a small allen wrench, carefully unscrew the screws holding the safety switch in place on both sides of the gun.
• The screws do not have to be taken out all the way, just slightly loosen them until you are able to pull the switch off.
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• Using a Phillips #0 screwdriver, remove the two 6mm screws that were underneath the safety switch on both sides of the gun.
• Carefully remove the pieces that were held on by the screws.
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• Pull apart the cover when pulling the gearbox out.
• Pull the gearbox out.
• The gears will fall out when taking the gearbox out. Careful not to lose them.
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Amanda Toan

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Cal Poly, Team 18-41, Regan Fall 2012 crwdns2935289:0Cal Poly, Team 18-41, Regan Fall 2012crwdne2935289:0

CPSU-REGAN-F12S18G41

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