Flexxaire FX 2000 Series, Manual

Printed in Canada

June 14, 2007

Section 2 - Hydraulic Fan Group

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Page 2-5

Figure 5

Figure 6, Push

        Position

Figure 7, Pull

              Position

Figure 8, Neutral
      Position

Some  designs will require the removal of
capscrews and 2 half-moon rings or
equivalents (links); the pulley can then be slid
toward  the  hub  to  give  easier  access  to  the
hydraulic fittings, as shown in 

Figure 4

.

Figure 4

G.

If the primary operation of the fan is to “pull” air
towards  the  engine,  then  the  blades  must  be
mounted with the concave surface towards the
engine (assuming clockwise rotation of the fan).  If
the  primary  operation  of  the  fan  is  to  “push” air
away  from  the  engine,  then  the  blades  must  be
mounted with the concave surface away from the
engine.  The illustrations that follow show a fan that
primarily “pulls” air.

H.

The  quantity  and  location  of  the  counterweights
vary depending upon application.  Please refer to
the install sheet supplied with your fan. Insert the
supplied 1/4" NC long hex bolt through the lower
hole  in  the  blade cap, the blade shaft and the
blade.  Tighten  the assembly to the blade shaft
using the supplied  1/4" NC flanged lock nut.

I.

Insert the 1/4" NC short flange-head bolts through
the  upper holes in the blade caps and blades.
Tighten  the  blade  caps  to  the  blades  using  the
supplied 1/4" NC flanged lock nuts.  Regular hex-
head bolts with washers may be supplied in place
of flange-head bolts.

Note:

If any of the supplied flanged lock nuts are lost
or need to be replaced, they may be
substituted  with  grade  8  flanged nuts.

Loctite® 242 or equivalent must be applied
to the bolt if lock nuts are not used.

J.

Rotate  fan  by  hand  in  “PUSH”,  “PULL” and
“NEUTRAL”  modes (as shown in 

Figure  6

,

Figure 7

 & 

Figure 8

 respectively) to ensure that

the blade does not hit any obstructions such as
bolts, brackets, or braces. Secure remaining fan
blades.  Carefully  torque blade bolts with a
certified torque wrench to the following
specification:

1/4" - 20 NC to 9 ft./lbs.

WARNING - DO NOT OVER TORQUE

K.

Rotate fan blades once again by hand in
“NEUTRAL”,  “PULL”  and  “PUSH”  modes  to
ensure that the blades do not hit any obstructions
such as bolts, brackets, or braces.

L.

Tighten fan belts and replace all fan guards and
safety equipment. 

M.

Attach the "WARNING" label to the machine, on
a housing or guard, in a location near the fan
where it can be easily seen.

N.

Attach the "ATTENTION" label to the machine, in
the engine compartment, near the hub assembly
or another visible area.

2.2.2. Hydraulic Control Installation Guide

The Flexxaire

®

 FX Fan assembly requires a hydraulic

source and valving to operate.