Vta dial tower on Aries 1

Vta dial tower will not go up or down there are 2 set screws one on the side one on the top I taken the top off which is the dial with numbers on it there's a meter shaft coming up  I don't think screws are stripped called vpi  want me to send pictures ,I guess he doesn't have any?  I been looking at some tt the only difference I see is the side screw has knob screw now, looks like same tower can anyone help me to fix it thanks 
The screws you want are on the side and BACK, not the top.  They are hex though.