SPX Cooling Technologies MARLEY HP700 - Manual (Page 5)

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The U1 split taper bushing provided with the fan installation kit
will be either a Type 1 or a Type 2 bushing. A Type 1 bushing will
use the fan shaft key provided with the Geareducer. A Type 2
bushing uses an integral key that is shared by the output shaft
and the fan hub keyways. To distinguish which type of bushing
is provided, refer to Figure 4.
1–Remove the fan shaft key from the top of the Geareducer shaft
and discard if a Type 2 split taper bushing is being used. Thoroughly
clean the fan shaft and fan hub center bore to remove any debris
and/or protective coatings. After cleaning, apply a coat of anti-seize
compound from the end of the fan shaft down to the length of the
shaft keyway.
2–Remove the U1 split taper bushing from its packaging. Discard
and replace the 5/8-11NC black steel cap screws provided within
the bushing packaging with the 5/8-11NC stainless steel cap screws
provided with the fan installation kit. Thoroughly clean the bushing
center bore and outside taper (barrel) surface to remove any protec-
tive coating. After cleaning, apply a thin coat of anti-seize compound
to the outer taper surface of the bushing.
3–Aligning the outside taper (barrel) bushing key with the keyway
of the hub bore, loosely start the Type 1 or Type 2 bushing into the
bore of the hub. The three (3) threaded holes in the hub must be
aligned with the non-threaded holes in the bushing flange—
Note,
the two (2) threaded holes in the bushing flange are used only
for disassembly. Apply anti-seize compound to the threads of the
5/8-11NC stainless steel cap screws. Insert the cap screws through
the non-threaded holes in the bushing flange and thread them by
hand into the hub two or three turns only.
4–If a Type 1 split taper bushing is being used, prior to installing the
bushing-hub assembly onto the fan shaft, fully seat the key in the
fan shaft keyway. The key is a tight fit across the width and must
never be altered.
U1 Split Taper Bushing
➠
Fan Hub Installation