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Old 03-25-2014, 01:33 PM   #1 (permalink)
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Low velocity on Tippman pro lite and pro am

I recently found some tippmann pro lites and and pro am in my brother in laws old gear. We took them out to the field but they wouldnt chrono past 200 and 214. I was wondering if there was an easy fix for that or if I need to buy a new part for it.

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Old 03-25-2014, 01:35 PM   #2 (permalink)
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Were you using a siphon tank? (not anti-siphon)
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Old 03-25-2014, 01:38 PM   #3 (permalink)
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are you using them with c02 or hpa (these were designed to run on c02)? did you adjust the velocity screw on the bottom (out = higher fps)? try replacing the hammer drive spring. a quick fix would be putting a bb or something in the cap to load the spring a little more. you could try taking them apart and giving them a good cleaning / lubing, but have a seal kit on hand if you do that. old o-rings usually leak once they've been moved.
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Old 03-25-2014, 01:39 PM   #4 (permalink)
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not the expert but i have had that same problem, there could be several problems that contribute to this, the most effective fix i found was new spring for rear bolt. if you have a hard time finding, i had good luck with a red 98 Custom spring.
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Old 03-25-2014, 02:13 PM   #5 (permalink)
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I used both hpa and co2 and adjusted the screw maximum both ways. I used just a regular co2 tank, not sure about siphon or anti siphon. Just whatever your standard co2 tank is nowadays. I havent taken it apart yet, since we got them out the night before we were going to use them.
Ill have to try the bb in the spring trick or try stealing a spring from one of the 98 rentals at the field. (my brother in law owns the field)
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Old 03-25-2014, 02:19 PM   #6 (permalink)
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They probably need new hammer springs. Tippmannparts.com will have them.

That site also has full schematics for those markers so you can take them apart and get familiar with what makes em tick.
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Old 03-25-2014, 03:20 PM   #7 (permalink)
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thanks, the hammer springs are only about $3 on there. I'm probably going to pick a couple up.
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Old 03-25-2014, 03:33 PM   #8 (permalink)
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I could be wrong, as usual, but I had always read that the more primitive valve design of the Pro-Am/Pro-Lite wouldn't work reliably, if at all, with HPA. Thought they worked best on liquid CO2. The CVX valve design of the Pro-Carb, and later Tippy's, can run HPA for sure. I had to combine a red hammer spring for a 98 with my Ninja SHP tank reg set at 900psi to get my Pro-Carbine up from 230-245fps to 275-290fps.
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Old 03-25-2014, 03:44 PM   #9 (permalink)
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was it cold out today and you use co2? the new drive springs will help, probably its been worn out. the production of the Prolite stopped about 98/99, so those guns are closing in on their "prom". you can also warm up the co2(room temp is fine) to get the velocity up.
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Old 03-25-2014, 04:12 PM   #10 (permalink)
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I could be wrong, as usual, but I had always read that the more primitive valve design of the Pro-Am/Pro-Lite wouldn't work reliably, if at all, with HPA. Thought they worked best on liquid CO2. The CVX valve design of the Pro-Carb, and later Tippy's, can run HPA for sure. I had to combine a red hammer spring for a 98 with my Ninja SHP tank reg set at 900psi to get my Pro-Carbine up from 230-245fps to 275-290fps.
My Pro-am and Pro-lite both run fine on HPA.
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