CONFIDENTIAL TIBU3854-00

A high SOS particle count for lead, tin, copper, iron, silicon, zinc, and calcium does not necessarily mean the Fairfield Drive components are failing. The limits for the SOS particle counts for Asphalt Pavers drive is higher than the limits for other AVSpare machines. It has been proven that higher particle counts do not necessarily mean the component is failing.

NOTE: Changing the oil every 250 hours will reduce the particle count but not necessarily the wear of the components. It is recommended that the oil be changed after the first 50 hours and 500 hours thereafter. The recommended oil is TDTO 50WT.

The following particle count numbers are after break-in of the machine and/or components. If a sample comes back high, the planetary should be drained and flushed. Then another sample should be taken after 100 hours of operation.

Iron should be 550 or below. Silicon should be 44 or below. Clutch pack wear elements are lead, copper, and tin. Lead should be 99 or below. If lead is 100 or above, the clutches are experiencing abnormal wear. Copper should be 199 or below. If copper is 200 or above, the clutches are experiencing abnormal wear. Tin should be 7 or below. If tin is 8 or above, the clutches are experiencing abnormal wear.

The type of oil used will determine the high limits for the particle count for zinc and calcium. If TDTO 50WT oil is used, a particle count of between 3000 and 4000 would be considered normal for calcium and a particle count of between 1000 and 1400 would be considered normal for zinc.

Table 1 contains the groups that are affected by the higher particle count limits.

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