Originally Posted by Voidz
there is about 1-2 inches of play between the lower and upper tubes and the back block. is this normal?
Gonna need a pic of what you're talking about.
If you mean there's a 1"-2" gap between the body and the backblock, then no, that's not normal. You'll need to adjust the length of your pump arm to where there's only a slight, paperthin gap between them. You don't want it making contact every cycle, but you don't want a big gap, either.