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Note
Fan Hub Installation
The following instructions detail the process for installing a Marley
HP7000 fan on a Marley Geareducer
®
with a tapered fan (output)
shaft utilizing a bolted fan hub retention plate or a straight fan shaft
using a split taper bushing. Installation on other gear reduction
units may be different. Contact your Marley sales representative
for supplemental instructions if required.
If the fan installation is for a Marley 36, 38, 3600, or 4000 model
Geareducer, or uses a U1 split taper bushing on a straight (out-
put) shaft, refer to the applicable instructions below.
1–Remove the retention plate and hardware from the top of the
Geareducer shaft. Thoroughly clean the fan shaft, fan shaft key,
and the fan hub center bore to remove any debris and/or protective
coatings. After cleaning, apply a coat of anti-seize compound to
the top 7″ (180mm) of the fan shaft.
2–Prior to hub installation, fully seat the key in the fan shaft keyway.
The key is a tight fit across the width and must never be altered.
3–Raise the fan hub above the fan shaft for installation. Slowly lower
the hub onto the shaft with the keyways properly aligned. Make
certain the key does not slide down during installation. Stake the
key in the keyway with a center punch if necessary.
The fan shaft key should be approximately centered in the engaged
portion of the hub when engaged on the shaft. Verify the center hub
is fully seated by visual inspection.
4–Install the retention plate and hardware. Torque bolts to 70 ft·lb
ƒ
(95 N·m).
36 and 38 Series Geareducers use a tapered fan shaft key.
Correct key installation is imperative for proper and safe op-
eration. The following instructions detail installation for these
applications.
1–Remove the retention plate and hardware from the top of the
Geareducer. Thoroughly clean the fan shaft, fan shaft key, and the
hub center bore to remove any debris and/or protective coatings.
After cleaning, apply a coat of anti-seize compound to the top 7″
(180mm) of the fan shaft.
2–Install the 36 and 38 Series Geareducer fan shaft key in the fan
shaft keyway as shown in Figure 2. The key is a tight fit across the
width and must never be altered.
36 and 38 Geareducer