D6N Track-Type Tractor Power Train Caterpillar

For additional information, refer to the Power Train Hydraulic Schematic in the Systems Operation section of this module.

Table 1

Power Train Oil System
Machine Condition:		Brakes On	Brakes Off	Brakes Off
Actuating Control:		Parking Brake
Test Location
ER1	Engine Speed (RPM)	Low Idle	Low Idle	High Idle
	Transmission Gear	Neutral	Neutral	Neutral
	Power Train Oil Type (Weight)	SAE 30	SAE 30	SAE 30
Q1	Power Train Oil Temperature	75 ± 5°C (167 ± 9°F)	75 ± 5°C (167 ± 9°F)	75 ± 5°C (167 ± 9°F)
B1	Left Hand Brake Pressure	0	2750 ± 150 kPa (400 ± 22 psi)	2850 ± 150 kPa (415 ± 22 psi)
C1	Left Hand Clutch Pressure	2140 ± 150 kPa (310 ± 22 psi)	2140 ± 150 kPa (310 ± 22 psi)	2240 ± 150 kPa (325 ± 22 psi)
B2	Right Hand Brake Pressure	0	2750 ± 150 kPa (400 ± 22 psi)	2850 ± 150 kPa (415 ± 22 psi)
C2	Right Hand Clutch Pressure	2140 ± 150 kPa (310 ± 22 psi)	2140 ± 150 kPa (310 ± 22 psi)	2240 ± 150 kPa (325 ± 22 psi)
P	Transmission Main Relief Valve	2925 ± 125 kPa (424 ± 18 psi)	2925 ± 125 kPa (424 ± 18 psi)	3100 ± 150 kPa (450 ± 22 psi)
PV	Priority Valve Pressure (2)	1000 kPa (145 psi) Maximum	2925 ± 125 kPa (424 ± 18 psi)	1000 kPa (145 psi) Maximum
M	Torque Converter Inlet Pressure	N/A	N/A	640 ± 80 kPa (92 ± 12 psi)
N	Torque Converter Outlet Pressure	N/A	N/A	500 ± 70 kPa (72 ± 10 psi)
L1	Transmission Lube Pressure	12 kPa (2 psi) Minimum	12 kPa (2 psi) Minimum	250 ± 50 kPa (36 ± 7.5 psi)
LB1	Left Hand Clutch/Brake Lube Pressure	N/A	N/A	170 ± 30 kPa (25 ± 4 psi)
LB2	Right Hand Clutch/Brake Lube Pressure	N/A	N/A	170 ± 30 kPa (25 ± 4 psi)

( 2 )

The priority valve regulates the flow at high pressure under any of these conditions: (a) the engine speed is less than 1300 rpm. (b) The transmission speed or direction is changed. (c) The power train oil temperature in sump (Q1) is less than 40°C (104°F). The valve remains at low pressure when the parking brake is engaged.

Table 2

Power Train Oil System
Machine Condition:		Left Brake On	Right Brake On	Both Brakes On	Both Brakes On
Actuating Condition:		Hand Control	Hand Control	Foot Control	Foot Control
Test Location
ER1	Engine Speed (RPM)	High Idle	High Idle	High Idle	1935 ± 70 RPM
	Transmission Gear	Neutral	Neutral	Neutral	3 Forward Stall
	Power Train Oil Type (Weight)	SAE 30	SAE 30	SAE 30	SAE 30
Q1	Power Train Oil Temperature	75 ± 5°C (167 ± 9°F)	75 ± 5°C (167 ± 9°F)	75 ± 5°C (167 ± 9°F)	75 ± 5°C (167 ± 9°F)
B1	Left Hand Brake Pressure	325 kPa (47 psi) Maximum	2850 ± 150 kPa (415 ± 22 psi)	0	0
C1	Left Hand Clutch Pressure	0	2240 ± 150 kPa (325 ± 22 psi)	2240 ± 150 kPa (325 ± 22 psi)	2240 ± 150 kPa (325 ± 22 psi)
B2	Right Hand Brake Pressure	2850 ± 150 kPa (415 ± 22 psi)	325 kPa (47 psi) Maximum	0	0
C2	Right Hand Clutch Pressure	2240 ± 150 kPa (325 ± 22 psi)	0	2240 ± 150 kPa (325 ± 22 psi)	2240 ± 150 kPa (325 ± 22 psi)
P	Transmission Main Relief Valve	3100 ± 150 kPa (450 ± 22 psi)	3100 ± 150 kPa (450 ± 22 psi)	3100 ± 150 kPa (450 ± 22 psi)	3050 ± 150 kPa (445 ± 22 psi)
PV	Priority Valve Pressure (2)	1000 kPa (145 psi) Maximum	1000 kPa (145 psi) Maximum	1000 kPa (145 psi) Maximum	1000 kPa (145 psi) Maximum
M	Torque Converter Inlet Pressure	640 ± 80 kPa (92 ± 12 psi)	640 ± 70 kPa (92 ± 10 psi)	640 ± 80 kPa (92 ± 12 psi)	440 ± 80 kPa (64 ± 12 psi)
N	Torque Converter Outlet Pressure	500 ± 70 kPa (72 ± 10 psi)	500 ± 70 kPa (72 ± 10 psi)	500 ± 70 kPa (72 ± 10 psi)	420 ± 70 kPa (60 ± 10 psi)
L1	Transmission Lube Pressure	250 ± 50 kPa (360 ± 7.5 psi)	250 ± 50 kPa (360 ± 7.5 psi)	250 ± 50 kPa (360 ± 7.5 psi)	140 ± 30 kPa (20 ± 4.5 psi)
LB1	Left hand Clutch and Brake Lubrication	170 ± 30 kPa (25 ± 4 psi)	170 ± 30 kPa (25 ± 4 psi)	170 ± 30 kPa (25 ± 4 psi)	130 ± 30 kPa (19 ± 4.5 psi)
LB2	Right Hand Clutch and Brake Lubrication	170 ± 30 kPa (25 ± 4 psi)	170 ± 30 kPa (25 ± 4 psi)	170 ± 30 kPa (25 ± 4 psi)	130 ± 30 kPa (19 ± 4.5 psi)

( 2 )

The priority valve regulates the flow at high pressure under any of these conditions: (a) the engine speed is less than 1300 rpm. (b) The transmission speed or direction is changed. (c) The power train oil temperature in sump (Q1) is less than 40°C (104°F). The valve remains at low pressure when the parking brake is engaged.