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SG 552-1 Commando Gearbox Replacement

Introduction

This guide will be showing step-by-step instructions on how to get to and replace the gearbox of the airsoft gun.

What you need

  1. SG 552-1 Commando Gearbox Replacement, Gearbox: step 1, image 1 of 2 SG 552-1 Commando Gearbox Replacement, Gearbox: step 1, image 2 of 2

    • 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.

    Edit

  2. SG 552-1 Commando Gearbox Replacement: step 2, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 2, image 2 of 2

    • 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.

    Edit

  3. SG 552-1 Commando Gearbox Replacement: step 3, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 3, image 2 of 2

    • 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.

    Edit

  4. SG 552-1 Commando Gearbox Replacement: step 4, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 4, image 2 of 2

    • Carefully tug on the tip of the gun and pull the barrel and its cover out.

    Edit

  6. SG 552-1 Commando Gearbox Replacement: step 5, image 1 of 3 SG 552-1 Commando Gearbox Replacement: step 5, image 2 of 3 SG 552-1 Commando Gearbox Replacement: step 5, image 3 of 3

    • 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.

    Edit

  7. SG 552-1 Commando Gearbox Replacement: step 6, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 6, image 2 of 2

    • Pull the motor out of the hand grip.

    • Using a Phillips #1 screwdriver, remove the two 5mm screws inside of the hand grip.

    Edit

  8. SG 552-1 Commando Gearbox Replacement: step 7, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 7, image 2 of 2

    • Locate the pin holding the folding stock in place.

    • Using an allen wrench or something small, carefully push the pin out.

    Edit

  9. SG 552-1 Commando Gearbox Replacement: step 8, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 8, image 2 of 2

    • 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.

    Edit

  10. SG 552-1 Commando Gearbox Replacement: step 9, image 1 of 3 SG 552-1 Commando Gearbox Replacement: step 9, image 2 of 3 SG 552-1 Commando Gearbox Replacement: step 9, image 3 of 3

    • 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.

    Edit

  11. SG 552-1 Commando Gearbox Replacement: step 10, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 10, image 2 of 2

    • 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.

    Edit

  12. SG 552-1 Commando Gearbox Replacement: step 11, image 1 of 2 SG 552-1 Commando Gearbox Replacement: step 11, image 2 of 2

    • 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.

    Edit

  13. SG 552-1 Commando Gearbox Replacement: step 12, image 1 of 3 SG 552-1 Commando Gearbox Replacement: step 12, image 2 of 3 SG 552-1 Commando Gearbox Replacement: step 12, image 3 of 3

    • 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.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

3 other people completed this guide.

Author

with 4 other contributors

Amanda Toan

Member since: 10/05/12

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1 Guide authored

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Team

Cal Poly, Team 18-41, Regan Fall 2012 Member of Cal Poly, Team 18-41, Regan Fall 2012

CPSU-REGAN-F12S18G41

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6 Guides authored

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