RUNRACE : Service & Maintenance Manual - rev. 2.0
Page 3.11
3.4. AUTOMATIC LUBRICATION SYSTEM
Up until serial number 3905, the machine was equipped with an oil reservoir and pump for the
automatic lubrication of the tread belt. Starting from serial number 3906, these components have
been eliminated, and the automatic tread belt lubrication function is no longer available. However,
for reasons of compatibility, the machine configuration SW procedure still retains the parts
pertaining to the lubrication system.
The principal reasons for the elimination of the automatic lubrication pump are:
•
Difficulty in finding the right compromise between the quantity of oil and the interval between
successive lubrication cycles, as these are considerably influenced by the working conditions:
how much the machine is used, the average speed, weight of the users, ambient temperature
conditions etc… Incorrect values of these parameters have in fact caused problems of both
excessive and insufficient lubrication.
•
Technological advances have made available new materials for the manufacture of self-
lubricating tread belts.
3.4.1. M
ECHANICAL COMPONENTS
The pump and reservoir were positioned above the guard of the up-down motor photocell. In
response to a start command transmitted by the CPU board, a long connecting tube conveyed the oil
from the reservoir to the area indicated in the figure below:
3.4.2. C
ONTROL SIGNALS
To start the pump, the CPU board sends a signal to the power distribution board which, by means of
a relay, closes the contact carrying the supply voltage (220 VAC) to the pump. The CPU board
asserts the pump-enable signal for a preset period each time that the machine has covered a preset
distance. These values are determined by machine configuration parameters as specified in
paragraph 9.2. .
Resetting the pump enable signal opens the relay contact, switching off the pump.
The reservoir incorporates a float for monitoring the oil level. When the oil level falls below the
minimum mark, a signal is transmitted to the CPU board causing it to display the message “BELT
LUBRICANT OUT: REFILL” or “BELT LUBRICANT OUT, ACT NOW”, depending on the SW
release installed, on the LCD at each power-up.
WARNING: This message is ambiguous and may be misinterpreted. In fact it does not
mean that the oil is finished, but only that the oil level is low. When this message first
appears the lubrication can continue to function for at least another 2-3 cycles.
WARNING: The machine can be manually “forced” to perform an unscheduled
lubrication cycle by simultaneously pressing the “1”, “4” and “7” keys.
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