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Old 01-03-2009, 01:11 AM #1
u238
 
 
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MQ and back block

After installing an MQ valve, you no longer have the cocking rod to keep the back block straight. The effect seems quite pronounced on my karnivor after removing the ICS as an experiment. Are twisting and shear stresses on the pump arm and bolt anything to worry about? How do MQ users deal with this issue?
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Old 01-03-2009, 01:54 AM #2
uberPHAGE 2
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dont take the ics rod out...
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Old 01-03-2009, 02:17 AM #3
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Yes, on a normal cocker (not a Karni's ICS) the cocking rod will stick out further then normal, and remain stationary as the back block moves. The rod can be cut down shorter if so desired.

In any case, the rod should definitely be left in place. Otherwise, the backblock will twist at an angle and either damage the block, snap the pump arm, or possibly your ram shaft.
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Old 01-03-2009, 06:08 AM #4
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I don't know, I removed my cocking rod because I could watch the back block when it was cycling and it wasn't even touching the rod for guidance. Keep in mind, you have to make sure everything is perfectly aligned. I took it out and ran it that way all last season without any problems. But I never tried to set any speed records either, 15bps tops.

It's a moint point for me now, because I just halfblocked my gun. If you think about it, a halfblock doesn't have a rod guiding the sled - it's just the bolt preventing up/down side to side play.
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Old 01-03-2009, 04:36 PM #5
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If I pull the cocking rod out of the hammer assembly and leave it on the back block, will it clear the MQ valve?
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Old 01-04-2009, 12:13 AM #6
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You'll have to cut down your ICS rod to 1.5" OAL. Use a hacksaw or dremel.
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Old 01-04-2009, 11:05 PM #7
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I see. Hacksaw is ready.
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