D6T Track-Type Tractor Systems Caterpillar


Power Train Oil Pump

Usage:

D6T XW CG8


Illustration 1g02725239

Table 1
Section(1)  (A)  (B)  (C) 
Function  Torque Converter Charge Pump Section  Transmission Charge Pump Section  Torque Converter and Transmission Scavenge Section 
Output  135 L/min (35 US gpm)  50 L/min (13.21 US gpm)  102 L/min (26.95 US gpm) 
RPM  1800  1800  900 
Pressure  1035 kPa (150 psi)  2760 kPa (400 psi)  70 kPa (10 psi) 
(1) Rotation is counterclockwise in all sections.

Table 2
Specifications for 270-1762 Gear Pump Gp 
Item  Qty  Part  Specification Description 
5H-4279 Cup Plug  Apply high strength/ high temperature. Anaerobic flange sealant to the bore of the cup plug. 
Installation depth is 1.25 ± 0.25 mm (0.049 ± 0.010 inch).
6L-4783 Bolt  Torque to 30 ± 4 N·m (266 ± 35 lb in)
111-4919 Lip Type Seal  Apply high strength/ high temperature. Anaerobic flange sealant to the bore of the lip type seal. 
Lubricate the sealing lip of the lip type seal lightly with the lubricant that is being sealed.


Illustration 2g02725240
Section D-D

Table 3
Specifications for 270-1762 Gear Pump Gp 
Item  Qty  Part  Specification Description 
Lubricate the pump with clean oil before operation. The pump must turn freely before installation and after installation. Assemble the pump to the case of the case and frame. 
Clearance between the gears and the cover. Section (A) is the original dimension is 0.115 ± 0.033 mm (0.0045 ± 0.0013 inch)
Clearance between the gears and the body. Section (B) is the original dimension is 0.086 ± 0.021 mm (0.0034 ± 0.0008 inch)
Clearance between the gears and the cover. Section (C) is the original dimension is 0.104 ± 0.043 mm (0.0041 ± 0.0017 inch)
Original diameter of the shafts is 31.742 ± 0.005 mm (1.2497 ± 0.0002 inch)


Illustration 3g02725384
View of area J

Table 4
Specifications for 270-1762 Gear Pump Gp 
Item  Qty  Part  Specification Description 
Location of the joints of two bushings from the vertical centerline 30 ± 15 degrees. 
130-5704 Bushing  Bore of the bushing after installation is 31.786 ± 0.008 mm (1.2514 ± 0.0003 inch)
Installation depth is 1.50 ± 0.25 mm (0.059 ± 0.010 inch).


Illustration 4g02725409
View of area K

Table 5
Specifications for 270-1762 Gear Pump Gp 
Item  Qty  Part  Specification Description 
5M-3605 Dowel  Extension of the dowels from the face of the oil pump body (5) is 5.0 ± 0.5 mm (0.20 ± 0.02 inch)


Illustration 5g02725665
View of area L

Table 6
Specifications for 270-1762 Gear Pump Gp 
Item  Qty  Part  Specification Description 
Location of the joints of two bushings from the vertical centerline 30 ± 15 degrees. 
7M-9338 Bushing  Bore of the bushing after installation is 31.786 ± 0.008 mm (1.2514 ± 0.0003 inch)
Installation depth of (V) is 4.00 ± 0.25 mm (0.157 ± 0.010 inch).
Installation depth of (X) is 1.50 ± 0.25 mm (0.059 ± 0.010 inch).
8M-8489 Dowel  Extension of the dowels from the face of the oil pump body assembly (6) is 5.0 ± 0.5 mm (0.20 ± 0.02 inch)


Illustration 6g02725670
View of area M

Table 7
Specifications for 270-1762 Gear Pump Gp 
Item  Qty  Part  Specification Description 
Location of the joints of two bushings from the vertical centerline 30 ± 15 degrees. 
7M-9338 Bushing  Bore of the bushing after installation is 31.786 ± 0.008 mm (1.2514 ± 0.0003 inch)
Installation depth is 1.50 ± 0.25 mm (0.059 ± 0.010 inch).

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