3126B and 3126E Truck Engines Caterpillar


Cylinder Block

Usage:

3126B 1AJ



Illustration 1g01337176

(A) The dowels extend past the top deck of the cylinder block by the following distance. ... 14 ± 2 mm (0.5 ± 0.1 inch)

(B) The dowels extend past the front face of the cylinder block by the following distance. ... 8 ± 0.5 mm (0.32 ± 0.02 inch)

(C) The dowels extend past the rear face of the cylinder block by the following distance. ... 12 ± 0.5 mm (0.47 ± 0.02 inch)




Illustration 2g01337178

(1) Location of the bearing oil hole

(D) Bore diameters in the cylinder block for all camshaft bearings except the front bearing ... 69.000 ± 0.038 mm (2.7165 ± 0.0015 inch)




Illustration 3g01337177

(2) Location of the joint for the front camshaft bearing

(4) Location of the sequence number for the bearing cap

(3) Front camshaft bearing oil hole

Note: The front camshaft bearing is installed with the bearing oil hole in alignment with the oil hole in the cylinder block and bearing joint (2) in the position that is shown.

(E) Distance from the centerline of the crankshaft bore to the top surface of the cylinder block ... 322.00 mm (12.677 inch)

(F) Bore diameter in the cylinder block for the front camshaft bearing ... 70.000 ± 0.025 mm (2.7559 ± 0.0010 inch)

(G) Bearing cap

Width of the main bearing cap ... 159.995 mm (6.2990 inch)
Width of the cylinder block for the main bearing cap ... 159.977 to 160.018 mm (6.2983 to 6.2999 inch)

(H) Distance from the centerline of the crankshaft bore to the pan rail ... 110.00 mm (4.331 inch)

(J) Bore in the cylinder block for the seven main bearings ... 95.000 ± 0.013 mm (3.7402 ± 0.0005 inch)

(5) Main bearing cap bolts

Install the bearing caps with the sequence number to the right. The order is 1 through 7 (front to rear).

  1. Apply 6V-4876 Lubricant to the bolt threads and face of the washers.

  1. Tighten bolts (5) on each bearing cap.

    Tighten to the following torque. ... 54 ± 7 N·m (40 ± 5 lb ft)

  1. Tighten bolts (5) on each bearing cap again.

    Tighten the bolts by another one quarter of a turn. ... 90 ± 5 degrees

Note: Additional information on reconditioning procedures can be ordered. Refer to the following documents:

Guideline For Reusable Parts And Salvage Operations, SEBF8192, "Specifications and Salvage for Cylinder Blocks on 3114, 3116, 3126 and 3126B Engines"

Guideline For Reusable Parts And Salvage Operations, SEBF8261, "Installing a 7C-6208 Cylinder Sleeve in 3114 and 3116 Engines and a 107-7604 Cylinder Sleeve in 3126 Engines"

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