Marley Geareducer 3600, User Manual

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2
fan hub installation
The following instructions detail the process for installing a fan
on a Marley Geareducer with a straight fan shaft using a split
taper bushing or a tapered fan shaft utilizing a bolted fan hub
retention plate.
Straight Fan Shaft with Split Taper Bushing
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·lbƒ
(95 N·m).
Tapered Fan Shaft
Warning
– Correct key installation is imperative for proper and
safe operation
1. Remove the retention plate and hardware from the top of the
Geareducer shaft. 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 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.
3. Raise the hub assembly above the fan shaft for installation.
Slowly lower the assembly onto the shaft with the keyways
aligned. Make certain the key does not slide down during
installation.
After the hub assembly is installed the bottom end of the key
must extend through the bottom of the center hub, and the top
end of the key must be at least 5/8" (16mm) above the top of
the fan shaft. Do not force the key down once these criteria
are met.
4. Figure 1 illustrates proper retention plate and hardware instal-
lation. The retention plate is designed to allow clearance for
the fan shaft key, and when properly installed will not extend
over or interfere with the key in any way. Torque the retention
bolts to 70 ft·lb
ƒ
(95 N·m) then turn up the locking strap corners
to prevent the bolts from loosening.
GEAREDUCER
FAN SHAFT
TAPERED SIDE
OF KEY
PREVIOUS
STYLE KEY
1 3 /
8
"
1 3 /
8
"
1 5
/
8
"
1 1
/
2
"
1
1 /
2 "
1 1 /
2
"
KEY
FAN HUB
LOCKING
STRAPS
RETENTION
PLATE
RETENTION
BOLTS
Figure 1
Retention Plate Assembly
Figure 2
Key Installation