769D TRUCK & 771D QUARRY TRUCK POWER TRAIN Caterpillar


Lockup Clutch And Solenoid Valve Group 128-2352

Usage:


Bottom View


Section A-A


Section B-B


NOTICE

Do not use caustic (corrosive) materials to clean any parts in this valve group. Caustic materials will cause corrosion and damage to parts.


At Low Idle:

Lockup clutch pilot pressure ... 1725 ± 70 kPa (250 ± 10 psi)

Lockup clutch maximum pressure ... 1725 ± 70 kPa (250 ± 10 psi)

Lockup clutch primary pressure ... 965 ± 35 kPa (140 ± 5 psi)

(1) Torque coil assembly nut to ... 5.0 ± 0.5 N·m (3.7 ± .4 lb ft)

(2) Torque cartridge assembly to ... 50 ± 5 N·m (37 ± 4 lb ft)

(3) 9J-1330 Shim thickness ... 0.79 mm (.031 in)

One shim will change pressure ... 62 kPa (9.0 psi)

2S-0675 Spacer thickness ... 0.4 mm (.016 in)

One shim will change pressure ... 31 kPa (4.5 psi)

8J-4452 Shim thickness ... 0.12 mm (.005 in)

One shim will change pressure ... 10 kPa (1.5 psi)

(4) 8P-9739 Load Piston Orifice:

Orifice thickness ... 6.60 mm (.260 in)

Outside diameter ... 15.62 ± 0.08 mm (.614 ± .003 in)

(5) 8E-6144 Spring (outer):

Color code ... white stripe and red stripe

Length under test force ... 79.0 mm (3.1 in)

Test force ... 141.4 ± 9.0 N (31.8 ± 2.0 lb)

Free length after test ... 95.8 mm (3.77 in)

Outside diameter ... 14.8 mm (.582 in)

(6) 6Y-7267 Spring (inner):

Color code ... red stripe

Length under test force ... 65 mm (2.6 in)

Test force ... 55.28 ± 2.76 N (12 ± .620 lb)

Free length after test ... 96.13 mm (3.784 in)

Outside diameter ... 8.12 mm (.320 in)

(7) 9D-7884 Spring:

Length under test force ... 18.6 mm (.73 in)

Test force ... 161 N (36.3 lb)

Free length after test ... 23.88 mm (.937 in)

Outside diameter ... 15.78 mm (.622 in)

Color code ... white stripe

(8) 9P-0683 Spring:

Length under test force ... 25.4 mm (1.00 in)

Test force ... 35.6 ± 2.8 N (8.00 ± .63 lb)

Free length after test ... 66.04 mm (2.600 in)

Outside diameter ... 21.4 mm (.84 in)

(9) 4M-2381 Spring:

Quantity ... 2

Length under test force ... 12.2 mm (.48 in)

Test force ... 2.30 ± 0.18 N (.517 ± .041 lb)

Free length after test ... 22.6 mm (.89 in)

Outside diameter ... 7.62 mm (.300 in)

(10) 5J-2721 Shim thickness ... 0.13 mm (.005 in)

One shim will change pressure ... 10 kPa (1.5 psi)

6J-3993 Shim thickness ... 0.25 mm (.010 in)

One shim will change pressure ... 19 kPa (2.8 psi)

5J-1036 Shim thickness ... 0.80 mm (.031 in)

One shim will change pressure ... 60 kPa (8.7 psi)

(11) 9W-7410 Spring:

Color code ... three light blue stripes

First test:

Length under test force ... 79.5 mm (3.13 in)

Test force ... 78.3 ± 3.9 N (18.0 ± .9 lb)

Second test (add to the above values):

Length under test force ... 63.0 mm (2.48 in)

Test force ... 159.0 ± 4.8 N (36.0 ± 1.1 lb)

Free length after test ... 87.63 mm (3.450 in)

Outside diameter ... 14.73 mm (.580 in)

(12) Torque two bolts to ... 30 ± 7 N.m (22 ± 5 lb)

(13) Torque for four bolts that hold the cover on ... 30 ± 7 N·m (22 ± 5 lb ft)

Caterpillar Information System:

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