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98C Pro Recock issue
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qdenning View Drop Down
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Joined: 25 September 2008
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    Posted: 25 September 2008 at 11:04pm
I just purchased a used 98C pro locally and I'm having a problem where it will shoot 1 shot after a manual cock, and it partially re-cocks itself.  I have to tug back on the bolt lever about 1/4" then it will fire 1 shot again.  So far here's what I've tried:
-replaced sear spring
-replaced rear bolt 'o-ring'
-lubed with extreme rage oil (per local shop's recommendation)
-replaced 1 valve lock bolt

Still has the same problem.  I'm about to give up and take it to the shop, any ideas??  PS- I'm new at this.
Thanks!!

9/26 UPDATE:
I've replaced the rear bolt and the sear, they were slightly worn.  This still hasn't fixed the issue.  To restate the issue. It will cock manually just fine, fires fine, but after it fires you have to just ever so slightly bump the bolt lever back about 1/8" of an inch before you hear the click and it's ready to fire again.


Edited by qdenning - 26 September 2008 at 2:00pm
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Robotech View Drop Down
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Points: 425 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Robotech Quote  Post ReplyReply Direct Link To This Post Posted: 26 September 2008 at 12:33pm
Partially re-cocks?  That doesn't sound right.  You mean like it is getting jammed when it tries to re-cock? 
New to the sport?

Proud owner of a WS-66 A-5 ACP
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oldpbnoob View Drop Down
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Points: 5676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote oldpbnoob Quote  Post ReplyReply Direct Link To This Post Posted: 26 September 2008 at 2:52pm
Typically, if the marker is gassed up and the rear bolt fails to catch on the sear, you get "full auto". Seems obvious, but you are doing this with the tank on right?
"When I grow up I want to marry a rich man and live in a condor next to the beach" -- My 7yr old daughter.
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Points: 396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AoSpades Quote  Post ReplyReply Direct Link To This Post Posted: 26 September 2008 at 4:52pm
Make sure your springs are in the right places. when the shorter spring is switched it tends to half cock.
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qdenning View Drop Down
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yes tank is on, it's not making the 'full auto' type sound like it makes when running out of air.

springs are in the right place

thanks for the tips, keep 'em coming!
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check your powertube, might be cracked or something may be blocking it from cocking all the way. 1/8 in. means something very small could be blocking that other 1/8 in. it needs.
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uno187 View Drop Down
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Points: 155 		Post Options Post Options   Thanks (0) Thanks(0)   Quote uno187 Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2008 at 10:39am
check the ball detent. if it is in backwards this will happen. it's the orange thing in the front of the gun where the ball is fed.

http://www.tippmannparts.com/index.cfm?fuseaction=catalog.pr odInfo&productID=509&categoryID=12

it should curve forward toward the barrel to keep the ball in place in front of the bolt ready to fire. if it curves toward the front bolt allowing the ball to roll into the barrel it is in backwards.

good luck
98 Custom Pro
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Mack View Drop Down
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Originally posted by qdenning qdenning wrote:

I just purchased a used 98C pro locally and I'm having a problem where it will shoot 1 shot after a manual cock, and it partially re-cocks itself.  I have to tug back on the bolt lever about 1/4" then it will fire 1 shot again.  So far here's what I've tried:
-replaced sear spring
-replaced rear bolt 'o-ring'
-lubed with extreme rage oil (per local shop's recommendation)
-replaced 1 valve lock bolt

Still has the same problem.  I'm about to give up and take it to the shop, any ideas??  PS- I'm new at this.
Thanks!!

9/26 UPDATE:
I've replaced the rear bolt and the sear, they were slightly worn.  This still hasn't fixed the issue.  To restate the issue. It will cock manually just fine, fires fine, but after it fires you have to just ever so slightly bump the bolt lever back about 1/8" of an inch before you hear the click and it's ready to fire again.


I've experienced this as well.  While I have never found the exact cause, I have found that in some cases a thorough cleaning will fix it.  I do have one marker that it has become a constant problem with though.  I have theories on why it happens but, as I have been unable to replicate the problem by moving the internals through a firing cycle (without air on the marker) with the left half of the body shell off I am not certain of the cause.

My theories are below:
  • Body shells are tightened down sufficiently to hinder back and forth movement of sear. 
    • This would prevent the sear from moving back far enough for the front of it to catch on the slider on the trigger.
    • Essentially the hammer would be locked back by the sear, but the trigger would be unable to release it.
    • Then, when you pull the bolt handle back to "recock" it allows the sear to move back and reset.
  • The slider spring is worn out.
    • Which might prevent the slider from popping back out to catch the sear.  (Binding between the slider and trigger might have the same effect.)
    • If this was the case though, I'm not sure that "recocking" would necessarily be the solution.
  • Some type of issue hindering forward trigger movement. 
    • If the trigger didn't return fully forward, it is possible that the slider would not drop below the end of the sear and thus couldn't trip it.
    • This could be caused by binding/wear with the pins that hold the trigger in place.
    • It could also be caused by a weak trigger return spring.
    • Theoretically, a loose saftey could also slide a bit and cause the trigger to bind.
    • In these cases I could see the "recocking" fixing the problem as removing the pressure of the drive spring from the trigger assembly (as transferred through the sear) might be sufficient to allow everything to move into place.
As I said though, due to difficulty in making the issue occur when I am observing the internals, I am not really sure.


Edited by Mack - 01 October 2008 at 12:00pm
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qdenning View Drop Down
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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote qdenning Quote  Post ReplyReply Direct Link To This Post Posted: 08 October 2008 at 1:25pm
Thanks for the feedback!!

I took it to my local shop and they gave it a thorough cleaning, lube job, and replaced an 'o-ring' in the front.  Problem solved.  I shot about 2000 balls through it at a scenario game on Saturday with zero problems.
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