In order to ensure an effective air seal, it is Important that a suitable caulking (we recommend
"STRIP CAULK" by 3M) be placed between the outlet adapter and the casing halves for a
short distance in each direction. Suggested approximate area of caulking is shown shaded m
Replace the self-tapping screws (22) which hold the front half of the casing to the outlet adapter.
It is important to reinsert the key before attempting to tighten the impeller setscrews. Failure
to do so will prevent proper tightening of the key setscrew. It Is also Imperative that the
sequence and torquing procedure outlined be followed exactly. Failure to sufficiently tighten
the setscrews may allow the Impeller to further loosen during operation of the blower, while
excessive tightening may damage the setscrews as well as impair their effectiveness.
BLOWER HUB LOCKING MECHANISM