tm m4a1 - loud mechbox after repair

sdsbwc · January 3rd, 2007, 01:26

alrite, where shall i begin.. i have a tm m4a1 new type with a version 2 mechbox, no upgrades, all stock.. just recently my spure gear stripped which really messed things up inside.. i managed to get a brand new TM replacement spur gear, in which i decided to try and install myself.
well.. the gun shoots now, everything seems to be fine, EXCEPT it seems to be making a whole lot more noise than it used to. i lubed the bushings, and the new spur gear, but i may have left out a shim or 2, could any please tell me if the shims would the cause of the excess noise, or if it's something else..
any help would be apprectiated.. thanks.
sdsbwc

mcguyver · January 3rd, 2007, 01:28

Missing shims can cause excessive noise. Make sure you put them back exactly how they came out.

sdsbwc · January 3rd, 2007, 01:31

the problem is, someone else took them out, i tried to watch as closely as possible.. is there a set place for all shims to be placed? or is it on a gun to gun basis? thx for ur speedy reply..

thephenom · January 3rd, 2007, 01:33

There isn't a set place, but more along the lines of trial and errors. Read up and follow a mechbox reshimming guide. That should help.

sdsbwc · January 3rd, 2007, 01:36

whereabouts can i find that guide? i'd search through the forums but that'd probably take more time than i wanna spare, so if u kno off hand where i can find it, that'd be great..

Ace of Spades© · January 3rd, 2007, 09:30

Try Mechbox.com, they have a nice video guide on how to take apart and upgrade (brushings) a TM V2.

HaZarD SFD · January 3rd, 2007, 09:35

Basically remove what will keep the gears from spinning freely in the mechbox.
i.e. Tappet Plate, Anti-Reversal latch, Piston and spring. Put the gears in close
the mechbox and spin them and see if they wobble or feel loose. adjust shimms
accordingly to get the gears to not wobble at all but spin nice and smooth. Then
reassemble like it should be. Also make sure the motor gear sits nicely when back
together and adjust height screw.

IMHO thats how it works after seeing Foxtail do it on a Ver.2 if im wrong please correct it.

Also go to www.mechbox.com for more details

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January 3rd, 2007, 01:26	#1
sdsbwc Trader rating Join Date: Sep 2006 Location: Toronto	tm m4a1 - loud mechbox after repair alrite, where shall i begin.. i have a tm m4a1 new type with a version 2 mechbox, no upgrades, all stock.. just recently my spure gear stripped which really messed things up inside.. i managed to get a brand new TM replacement spur gear, in which i decided to try and install myself. well.. the gun shoots now, everything seems to be fine, EXCEPT it seems to be making a whole lot more noise than it used to. i lubed the bushings, and the new spur gear, but i may have left out a shim or 2, could any please tell me if the shims would the cause of the excess noise, or if it's something else.. any help would be apprectiated.. thanks. sdsbwc

January 3rd, 2007, 01:28	#2
mcguyver Trader rating Join Date: Aug 2005 Location: Northern Alberta	Missing shims can cause excessive noise. Make sure you put them back exactly how they came out. __________________ Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy.

January 3rd, 2007, 09:35	#7
HaZarD SFD Trader rating Join Date: Sep 2005 Location: Ottawa	Basically remove what will keep the gears from spinning freely in the mechbox. i.e. Tappet Plate, Anti-Reversal latch, Piston and spring. Put the gears in close the mechbox and spin them and see if they wobble or feel loose. adjust shimms accordingly to get the gears to not wobble at all but spin nice and smooth. Then reassemble like it should be. Also make sure the motor gear sits nicely when back together and adjust height screw. IMHO thats how it works after seeing Foxtail do it on a Ver.2 if im wrong please correct it. Also go to www.mechbox.com for more details __________________ No Comment.

January 3rd, 2007, 01:31	#3
sdsbwc Trader rating Join Date: Sep 2006 Location: Toronto	the problem is, someone else took them out, i tried to watch as closely as possible.. is there a set place for all shims to be placed? or is it on a gun to gun basis? thx for ur speedy reply..

January 3rd, 2007, 01:33	#4
thephenom Trader rating Join Date: Jan 2006 Location: Toronto	There isn't a set place, but more along the lines of trial and errors. Read up and follow a mechbox reshimming guide. That should help.

January 3rd, 2007, 01:36	#5
sdsbwc Trader rating Join Date: Sep 2006 Location: Toronto	whereabouts can i find that guide? i'd search through the forums but that'd probably take more time than i wanna spare, so if u kno off hand where i can find it, that'd be great..

tm m4a1 - loud mechbox after repair

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