Frymaster D - Manual (Page 42)

DECATHLON SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-37
1.8.7 Improper Basket Lift Function
Bell-Crank Basket Lifts
Most Decathlon Series gas fryers are equipped with a bell-
crank style basket lift. A cam and a bell crank are connected
to the basket lift arm by a flat metal link. The cam is attached
to a drive motor. The motor rotates the cam, raising or
lowering the lift arm linked to the bell crank. A roller-
activated microswitch is used to limit travel. When the roller
in the microswitch is in contact with the cam, the motor is
energized. As the cam rotates, the roller loses contact with
the cam and the motor power circuit is broken, de-energizing
the motor.
Timing circuitry in the controller initiates and stops
basket lift operation. When the product button is pressed,
the timing circuitry activates a coil in the basket lift relay
to supply power to the motor. The microswitch stops the
motor at the lift’s lower travel limit and the switch
contacts are reversed. At the end of the programmed
cooking time, the timing circuit activates the coil once
more and the lift rises until the microswitch again loses
contact with the cam, opening the motor power circuit and
stopping the motor.
Problems with the bell-crank basket lift system can be
grouped into two categories:
• binds and jams or
• motor and gear wear.
Binds and jams. Noisy, jerky, or erratic lift movement is
usually due to lack of lubrication. Apply a light coat of
Lubriplate or similar lightweight white grease to the
connection points to correct the problem.
Motor Problems. If power is reaching the motor but the
motor fails to run, the motor is burned out and must be
replaced.
Back view of bell-crank basket lift.
Bell-crank basket-lift arms.