Patent ID: 8109849

Claim:
A device for compressing an automatic belt tensioning cylinder on an engine comprising: a pneumatic cylinder having a cylinder body and a piston rod having an end selectively extendable from the cylinder body; a toggle valve assembly that is operable to supply pressurized air to said pneumatic cylinder so as to selectively extend the piston rod from the cylinder body or retract the piston rod into the cylinder body; and, a jig assembly having a first wall affixed to the cylinder body and adapted to receive the piston rod, a pusher block secured to the extendable end of the piston rod, and a second wall opposite the first wall, the jig assembly receiving the tensioning cylinder between the pusher block and the second wall such that upon extension of the piston rod the tensioning cylinder is compressed between the pusher block and the second wall, wherein a first end of the tensioning cylinder is fixed on the engine and is received against the pusher block, and a second end of the tensioning cylinder is engaged by the second wall and is moved toward the first end of the tensioning cylinder as the piston rod extends from the cylinder body to compress the tensioning cylinder and release tension on a belt tensioned by the tensioning cylinder.