32
H.
FAN DRIVE COMPONENTS
When your radiator is supplied with a V-belt driven fan, the belt tension will need to be
checked frequently by the customer. On remote radiators, belts and sheaves are
installed by Rocore. On some engine-mounted radiators, belts and sheaves may be
mounted by the customer. For customer mounted fan drive components, here are some
pointers to keep in mind when installing the drive.
1. Make sure that all sheaves are aligned correctly (See Fig.14). Use a long level or
straight edge to check alignment.
2. Place the belts on the sheaves and then tension the drive on the slack side of the
belts with the idler until the belts begin to tighten (See Section IV. B. for correct belt
tension).
3. After the first 24 hours of operation, when the belts have had a chance to seat in the
grooves, re-check the belt tension.
4. Use of a tachometer to check for proper fan speed can assist in checking belt
tension.
I.
FAN POSITION
For engine-mounted radiators that use the engine-mounted fan for cooling, the fan must
be correctly positioned in the radiator’s fan shroud opening to obtain optimum fan
performance. The projected blade width needs to be 1/3 (for blower fan applications) or
2/3 (for sucker fan applications) into the fan shroud opening (See Fig. 15).
J.
STARTUP
If the radiator has been in storage, idle for an extended period of time or has been
subjected to adverse moisture conditions, add fresh grease to the motor bearings and
fan shaft bearings before startup. (See separate Section IV. A. for general greasing
instructions.)
WARNING! Inspect the fan before startup to make sure the blade tips do not hit
the shroud, fan ring or fan guards. Also inspect all moving parts (such as fans, shafts,
motors, sheaves and belts) for damage and/or loose bolts.
WARNING! Make sure that no foreign material or loose parts are in or near the air
stream, fan or other moving parts.
WARNING! As part of initial startup, check that the fan rotation and airflow
direction conform to the radiator assembly drawing.
WARNING! During initial startup, thoroughly check for excessive vibration, noise or
leaks.