2002/06/24 Caterpillar

Correction to Specifications , "Torque Converter and Transmission Pressure Chart" {3030, 3101, 3160}

Usage:

776D AFS

Off-Highway Truck/Tractor: 776D (S/N: AFS1-UP) 777D (S/N: AGC1-UP) 777D HAA (S/N: AGY1-UP)

Specification, RENR3318, "776D, 777D and 777D HAA Tractor/Off-Highway Trucks Power Train", "Torque Converter and Transmission Pressure Chart". This module is part of Service Manual, RENR3330.

Disregard Table 12. Disregard Table 13. Disregard Table 14. Refer to the following information.

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Table 12
Station ⁽¹⁾	A	B	C	E	F	G	H
Engaged Clutch	4	2	1	5	6	7	3
Type of Test	Pressure
Clutch Pressure At High Idle In Torque Converter Drive	-	2365 kPa (345 psi) ⁽²⁾	3000 ± 225 kPa (435 ± 33 psi)	-	2585 kPa (375 psi) ⁽²⁾	2790 kPa (405 psi) ⁽²⁾	-
Clutch Pressure At Low Idle In Torque Converter Drive	-	2365 kPa (345 psi) ⁽²⁾	2930 ± 225 kPa (425 ± 33 psi)	-	2585 kPa (375 psi) ⁽²⁾	2760 kPa (400 psi) ⁽²⁾	-
Primary Clutch Pressure At High Idle in Direct Drive	1410 kPa (205 psi) ⁽²⁾	2365 kPa (345 psi) ⁽²⁾	3000 ± 225 kPa (435 ± 33 psi)	2480 kPa (360 psi) ⁽²⁾	2585 kPa (375 psi) ⁽²⁾	2790 kPa (405 psi) ⁽²⁾	1860 kPa (270 psi) ⁽²⁾
Primary Clutch Pressure At Low Idle	515 ± 40 kPa (75 ± 6 psi)	275 ± 40 kPa (40 ± 6 psi)	345 ± 40 kPa (50 ± 6 psi)	345 ± 40 kPa (50 ± 6 psi)	415 ± 40 kPa (60 ± 6 psi)	415 ± 40 kPa (60 ± 6 psi)	550 ± 40 kPa (80 ± 6 psi)

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^( 1 )	Station "D" is not used.
^( 2 )	Tolerance is + 240 kPa (35 psi) or - 105 kPa (15 psi).

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Table 13
(7) Shims for the Pressure Control Valve
Valve Location ⁽¹⁾	A	B	C	E	F	G	H
Clutch that is engaged	4	2	1	5	6	7	3
The thickness of the shim	Pressure Change	Pressure Change	Pressure Change	Pressure Change	Pressure Change	Pressure Change	Pressure Change
5J-2721 Shim
0.13 mm (.005 inch)	13 kPa (1.9 psi)	16 kPa (2.4 psi)	20 kPa (2.9 psi)	17 kPa (2.4 psi)	17 kPa (2.4 psi)	18 kPa (2.7 psi)	18 kPa (2.6 psi)
6J-3993 Shim
0.25 mm (.010 inch)	26 kPa (3.8 psi)	33 kPa (4.8 psi)	41 kPa (5.9 psi)	33 kPa (4.8 psi)	33 kPa (4.8 psi)	37 kPa (5.4 psi)	35 kPa (5.1 psi)
4M-1751 Spacer
0.40 mm (0.016 inch)	42 kPa (6.1 psi)	53 kPa (7.7 psi)	65 kPa (9.4 psi)	53 kPa (7.7 psi)	53 kPa (7.7 psi)	59 kPa (8.6 psi)	56 kPa (8.2 psi)
5J-1036 Shim
0.80 mm (0.032 inch)	84 kPa (12.2 psi)	103 kPa (15.0 psi)	126 kPa (18.2 psi)	103 kPa (15.0 psi)	103 kPa (15.0 psi)	1144 kPa (16.6 psi)	109 kPa (15.8 psi)

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^( 1 )

Valve location (D) is not used.

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Table 14
Specifications and Identification of the Components of the Pressure Control Valve
Location of the Load Piston Body ⁽¹⁾	A	B	C	E	F	G	H
Thickness of the Load Piston Orifice	2.54 mm (0.100 inch)	2.54 mm (0.100 inch)	2.54 mm (0.100 inch)	4.58 mm (0.180 inch)	4.58 mm (0.180 inch)	4.58 mm (0.180 inch)	4.58 mm (0.180 inch)
Color of the Outer Spring of the Load Piston	Light Blue	Yellow	Light Green	Yellow	Yellow	Light Green	Light Green
Color of the Inner Spring of the Load Piston	Yellow	Light Blue	Light Blue	Light Blue	Light Blue	Yellow	Orange
Size of the Decay Orifice	1.57 mm (0.062 inch)	1.19 mm (0.047 inch)	-	1.57 mm (0.062 inch)	1.57 mm (0.062 inch)	-	1.40 mm (0.055 inch)
Color of the Decay Orifice	Green	Blue	-	Green	Green	-	Yellow
Overall Length of the Load Piston	58.5 mm (2.30 inch)	51.5 mm (2.03 inch)	51.5 mm (2.03 inch)	51.5 mm (2.03 inch)	51.5 mm (2.03 inch)	51.5 mm (2.03 inch)	58.5 mm (2.30 inch)