784C, 785C and 785C HAA Off-Highway Truck/Tractors Power Train Caterpillar


Torque Converter

Usage:

784C 2PZ



Illustration 1g01434406



Illustration 2g01434404

View A




Illustration 3g01434403

(1) Lockup clutch

Thickness of three new discs and of two new plates ... 21.35 ± 0.34 mm (0.841 ± 0.013 inch)

Thickness of one new 286-4365 Friction Disc ... 4.83 ± 0.08 mm (0.190 ± 0.003 inch)

Thickness of one new 1T-1897 Plate ... 3.43 ± 0.05 mm (0.135 ± 0.002 inch)




Illustration 4g00293522

Bolt Tightening Sequence for Bolts (2)

(2) Torque for 12 bolts ... 50 ± 7 N·m (37 ± 5 lb ft)

Use the following procedure to tighten 12 bolts (2) :

Tighten four of the bolts in numbered sequence 1 through 4. Then, tighten all 12 bolts in numbered sequence 5 through 16. Overlap the starting point in order to make sure that all of the bolts are at the required torque.




Illustration 5g00293524

Bolt Tightening Sequence for Bolts (3)

(3) Torque for 24 bolts ... 80 ± 10 N·m (59 ± 7 lb ft)

Use the following procedure to tighten 24 bolts (3) :

Tighten eight of the bolts in numbered sequence 1 through 8. Then, tighten all 24 bolts in numbered sequence 9 through 32. Overlap the starting point in order to make sure that all of the bolts are at the required torque.

(4) Torque for eight bolts ... 50 ± 7 N·m (37 ± 5 lb ft)

(5) Torque for six bolts ... 30 ± 5 N·m (22 ± 4 lb ft)

(6) Torque for 12 bolts ... 80 ± 10 N·m (60 ± 7 lb ft)

(7) Torque for three bolts ... 120 ± 15 N·m (89 ± 11 lb ft)

(8) Torque for 12 bolts ... 120 ± 15 N·m (88 ± 11 lb ft)

(9) 1T-1257 Springs for one-way clutch

Quantity ... 2
Length under test force ... 17.8 mm (0.70 inch)
Test force ... 30 ± 2.0 N (6.9 ± 0.45 lb)
Free length after test ... 27.4 mm (1.08 inch)
Outside diameter ... 5.84 mm (0.230 inch)



Illustration 6g00293523

Bolt Tightening Sequence for Bolts (10)

(10) Torque for 24 bolts ... 240 ± 25 N·m (177 ± 18 lb ft)

Use the following procedure to tighten 24 bolts (10) :

Tighten eight of the bolts in numbered sequence 1 through 8. Then, tighten all 24 bolts in numbered sequence 9 through 32. Overlap the starting point in order to make sure that all of the bolts are at the required torque.

(11) Torque for eight bolts ... 50 ± 7 N·m (37 ± 5 lb ft)

(12) Put a small amount of lubricant on the lip of the seal before installation.

(13) Torque for one bolt ... 240 ± 25 N·m (177 ± 18 lb ft)

(14) Torque for 11 bolts ... 50 ± 7 N·m (37 ± 5 lb ft)

(C) Installation depth of 223-9743 Lip Seal ... 50.8 ± 0.3 mm (2 ± 0.012 inch)

Table 1
Components     Clearance Across The Diameter     Running (1)    
(A) Stator and Turbine     new    
0.71 to 0.91 mm (0.028 to 0.036 inch)    

0.36 to 0.46 mm (0.014 to 0.018 inch)    
max
worn

1.83 mm (0.072 inch)    

0.91 mm (0.036 inch)    
(B) Stator and Impeller     new    
0.71 to 0.91 mm (0.028 to 0.036 inch)    

0.36 to 0.46 mm (0.014 to 0.018 inch)    
max
worn

1.83 mm (0.072 inch)    

0.91 mm (0.036 inch)    
( 1 ) One half of the clearance across the diameter

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