SOS PARTICLE COUNT LIMITS FOR THE FAIRFIELD DRIVE IS HIGHER THAN THE LIMITS FOR OTHER CATERPILLAR MACHINES Caterpillar


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SOS PARTICLE COUNT LIMITS FOR THE FAIRFIELD DRIVE IS HIGHER THAN THE LIMITS FOR OTHER CATERPILLAR MACHINES [TIBU3854]
MACHINE ARRANGEMENT
SOS PARTICLE COUNT LIMITS FOR THE FAIRFIELD DRIVE IS HIGHER THAN THE LIMITS FOR OTHER CATERPILLAR MACHINES

CONFIDENTIAL TIBU3854-00

TECHNICAL INFORMATION BULLETIN

May 14, 2003

Asphalt Pavers

AP-800C (1PM1-Up)

AP-1000B (7HN1-Up)

AP-1055B (8BM1-up, ABB1-Up)

BG-230 (9AL1-Up)

BG-260C (8GN1-Up)

BG-2455C (6TN1-Up, ACM1-Up)

 

Component Code 7542

SUBJECT: SOS PARTICLE COUNT LIMITS FOR THE FAIRFIELD DRIVE IS HIGHER THAN THE LIMITS FOR OTHER AVSEPILLAR MACHINES

PROBLEM:

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.

SOLUTION:

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.

Groups Affected

Asphalt Paver

Part Number

Description

BG-230

AP-800C

162-7569

Brake and Planetary Group

8I-0729

Final Drive Planetary Group

145-0093

Final Drive Planetary Group

AP-1055B

BG-2455C

207-9592

Brake and Planetary Group

149-4890

Brake and Planetary Group

136-4524

Final Drive Planetary Group

AP-1000B

BG-260C

207-9592

Brake and Planetary Group

149-4890

Brake and Planetary Group

136-4523

Final Drive Planetary Group

207-9594

Final Drive Planetary Group

 

COPYRIGHT 2003 AVSpare
ALL RIGHTS RESERVED

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