2009/07/20 Caterpillar

Track-Type Tractor:

D8T (S/N: J8B1-UP)

D8T (S/N: KPZ1-UP)

Service Magazine SEPD1001, July 2009, "An Improved Oil Supply Line for the Turbocharger Is Used on Some Track-Type Tractors ". Disregard this article. Refer to the article that follows. Part numbers for components have been updated.

Description of Change: The new oil supply line for the turbocharger is designed to eliminate the stresses from assembly. Also, points for the installation for clips have been added to the top and bottom of the oil supply line in order to eliminate stress from engine vibration.

Adaptable To: The new 324-1520 Hose As is a direct replacement for the existing 253-2626 Tube As. Refer to Illustration 1 through Illustration 3 for the layout of the new parts.

Illustration 1	g02156912
Rear view of the engine 332-9227 Bracket As mounting (1) Turbocharger (2) 4P-4460 Gasket (3) 0S-1571 Bolt (4) 5M-2894 Hard Washer (5) 324-1520 Hose As (6) 6V-6317 Bolt (7) 6V-5839 Washer (8) 325-6994 Clip (9) 325-6995 Clip (10) 332-9227 Bracket As (11) 6V-4248 Bolt (12) 0S-1594 Bolt

Illustration 2	g02156939
331-7463 Bracket As mounting (4) 5M-2894 Hard Washer (13) 331-7463 Bracket As (14) 3B-1915 Bolt

Illustration 3	g02159859
Right side view of the engine (5) 324-1520 Hose As (15) 228-7091 O-Ring Seal (16) 238-5080 O-Ring Seal (17) 6V-8722 Elbow (18) Oil return line from the turbocharger

Refer to Table 1 for the list of the parts that are needed in order to install the new 324-1520 Hose As.

Table 1

Quantity	Part Number	Description
1	324-1520	Hose As
2	325-6994	Clip
2	325-6995	Clip
1	331-7463	Bracket As
1	332-9227	Bracket As
8	5M-2894	Hard Washer
1	6V-4248	Bolt
1	6V-6317	Bolt
2	0S-1594	Bolt
2	3B-1915	Bolt
1	4P-4460	Gasket
2	0S-1571	Bolt
1	228-7091	O-Ring Seal
1	238-5080	O-Ring Seal
1	6V-8722	Elbow

This change is effective for the machine serial numbers that are listed in Table 2.

Table 2

Effective Serial Numbers

S/N:J8B2207-UP

S/N:KPZ3572-UP