2013/01/14 A New Idler Pulley Assembly Is Now Used For the D8T, 583T, and 587T {1405, 1802, 7320} Caterpillar


A New Idler Pulley Assembly Is Now Used For the D8T, 583T, and 587T {1405, 1802, 7320}
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2013/01/14 [SEPD1553]
ELECTRICAL AND STARTING SYSTEM
ALTERNATOR GP-CHARGING
2013/01/14 A New Idler Pulley Assembly Is Now Used For the D8T, 583T, and 587T {1405, 1802, 7320}
Pipelayer:
583T (S/N: CMX1-UP)
587T (S/N: FAT1-UP)
Track-Type Tractor:
D8T (S/N: J8B1-UP; KPZ1-UP)
Service Magazine SEPD1008, 7 September 2009, "A New Idler Pulley Assembly Is Now Used For the D8T, 583T, and 587T". Disregard this article. Refer to the information in the following article. The only change is to the effectivity listed above.

Description of Change: A new grooved idler pulley is now used for the D8T, 583T, and 587T. The new idler pulleys have improved protection from dust under the bolts as well as improved seals and grease for the internal bearing. These improvements will provide longer service life for the pulley by preventing debris from entering the seal and the pulley.

A new flat idler is now available for machines that are equipped with air conditioning. The machines now get a flat idler pulley with a dust cap that is pressed in the pulley. This new flat idler has a larger internal bearing as well as improved seals and grease for the internal bearing. The new pulley is not serviceable. The serviceable part number for the pulley is item 2 in Table 1. The serviceable pulley has the larger bearing, improved grease and seals for the bearing, and improved protection from dust.

Adaptable To: The new grooved 279-2589 Idler Pulley is effective with the following machines:

  • D8T (S/N: J8B2204-UP; KPZ3550-UP)

  • 583T (S/N: CMX507-UP)

  • 587T (S/N: FAT507-UP)

The new grooved 279-2589 Idler Pulley is adaptable to the following machines:

  • D8T (S/N: J8B1-2203; KPZ1-3549)

  • 583T (S/N: CMX1-506)

  • 587T (S/N: FAT1-506)

The new flat idler assembly with the dust cap is effective with the following machines that have air conditioning:

  • D8T (S/N: J8B2221-UP; KPZ3595-UP)

  • 583T (S/N: CMX526-UP)

  • 587T (S/N: FAT559-UP)

The serviceable 333-1207 Idler Assembly is adaptable to the following machines that have air conditioning:

Note: 333-1207 Idler Assembly does not have a press on dust cap but has an under bolt dust protection. Once, the new idler is in chassis it is not feasible to press in a new cap. Therefore the under bolt dust protection performs the equivalent task.

  • D8T (S/N: J8B1-UP; KPZ1-UP)

  • 583T (S/N: CMX1-UP)

  • 587T (S/N: FAT1-UP)

Table 1
Required Parts    
Item     New Part Number     Description     Former Part Number     Quantity    
1     279-2589 Idler Pulley     Grooved Idler Pulley for All Machines     289-6304 Idler Pulley     2    
2     333-1207 Idler Assembly  (1)     Flat Idler Pulley for Machines That Are Equipped with Air Conditioning     133-7023 Idler Pulley     1    
( 1 ) Serviceable replacement pulley

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