American Dryer Corp. ML-145 - Manual (Page 16)

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G. BLOWER MOTOR and IMPELLOR (GAS and STEAM)
The impellor is shaft driven. The blower motor
drives the shaft on which the impellor is
mounted. This enables the impellor to run at a
higher RPM, thereby producing a higher
airflow. (CFM).
H. IDLER ASSEMBLY
(Viewing from the rear of the dryer.)
The idler assembly is located approximately
on the lower center of the dryer. The idler
assembly consists of two (2) idler pulleys, the
small and large pulleys. The idler’s main
purpose is to reduce the speed and increase
torque provided to the tumbler (basket) bearing.
Also, at the idler assembly, belt tension can be
adjusted.
I. TUMBLER (BASKET) BEARING
and PULLEY ARRANGEMENT
The tumbler (basket) bearing and pulley
arrangement is located (viewing from the rear
of the dryer) approximately at the upper center
of the dryer. The arrangement consists of a
pulley and two (2) bearings which serve to
drive, adjust, and support the tumbler (basket).