C175-16 Locomotive Engine Caterpillar

Crankshaft Main Bearings - Remove and Install

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A⁽¹⁾	253-3272	Cylinder	2
B⁽²⁾	178-9312	Hose As	2
C⁽³⁾	253-3276	Distribution Coupler	1
C⁽³⁾	185-0683	Gage As	1
D⁽⁴⁾⁽⁵⁾	227-6724	Electric Hydraulic Pump Gp (120 V)	1
	227-8834	Electric Hydraulic Pump Gp (240 V)	1
	191-5347	Hydraulic Pump Gp	1
	156-7167	Manual Hydraulic Pump	1
E	279-3473	Engine Turning Tool	1
E	329-3831⁽⁶⁾	Air Power Turning Tool	1
F	369-4007	Bearing Driver	1
G	-	Guide Stud M20 - 2.5 by 250 MM	2
H	284-5266	Spanner Wrench	1

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⁽¹⁾	Part of Tool Group 278-1150
⁽²⁾	Part of Tool Group 278-1150
⁽³⁾	Part of Tool Group 278-1150
⁽⁴⁾	Use any of the pumps that are listed in Tooling (D) for this procedure.
⁽⁵⁾	The latest pumps and hoses require 151685 kPa (22000 psi) capacity.
⁽⁶⁾	Optional

Start By:

Remove the starting motors.
Remove the fuel filter base.
Remove the fuel pump.
Remove the engine oil pump.
Remove the engine oil cooler.
Remove the engine oil scavenge pump.

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Illustration 1	g01212026

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Illustration 2	g03350574

Remove bolts (1) and remove side cover (2). Repeat for the remaining side covers on both sides of the engine.
Remove bolt (3) from each side of the engine and install Tooling (G).
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Illustration 3 g01212105
Install Tooling (A) onto the studs for the crankshaft main bearing cap. Tighten the threaded collar of Tooling (A). Loosen the threaded collar of Tooling (A) by 1 1/2 turns. Attach Tooling (B) onto Tooling (A). Attach Tooling (B) onto Tooling (C). Attach Tooling (C) onto Tooling (D). Apply approximately 135 MPa (19580 psi) of pressure to Tooling (A). Use the drive on Tooling (A) in order to loosen the nuts for the crankshaft main bearings. Rotate the drive on Tooling (A) by approximately three turns. Release the pressure on Tooling (A). Remove Tooling (A).
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Illustration 4 g03350575
Remove crankshaft main bearing nuts (4). Remove plate (5).
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Illustration 5 g03350579
Slide down crankshaft main bearing cap (6) on the studs. Remove crankshaft main bearing (7) from crankshaft main bearing cap (6).
Install Tooling (F) in order to remove the upper crankshaft main bearing. If necessary, use Tooling (E) in order to rotate the crankshaft and remove the upper crankshaft main bearing.

Installation Procedure

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Illustration 6	g03350579

Lubricate main bearing studs (8) with clean engine oil. Use Tooling (H) and a suitable torque wrench in order to check the torque on main bearing studs (8). Tighten main bearing studs (8) to a torque of 100 ± 20 N·m (74 ± 15 lb ft).
Note: Be sure that the back of the main bearing is clean and free from oil.
Lightly lubricate the upper crankshaft main bearing with clean engine oil. If necessary, use Tooling (E) in order to rotate the crankshaft and remove main bearing. Use Tooling (F) and install the upper crankshaft main bearing into the cylinder block.
Lightly lubricate crankshaft main bearing (7) with clean engine oil. Install crankshaft main bearing (7) into crankshaft main bearing cap (6). Lift crankshaft main bearing cap (6) into position.
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Illustration 7 g03350574

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Illustration 8 g03350575
Lubricate bolts (3) with clean engine oil. Remove Tooling (G). Install bolts (3) finger tight.
Lubricate the main bearing studs with clean engine oil. Install plate (5). Install nuts (4) for the crankshaft main bearings finger tight.
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Illustration 9 g03350574
Start at the front of the engine and tighten bolts (3) on the right side of the cylinder block to a torque of 100 ± 20 N·m (74 ± 15 lb ft).
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Illustration 10 g01212105

Note: Show 14 to 15 threads or 28 to 30 mm of protrusion of the stud above the nut before tension is applied. Show 16 to 17 threads or 32 to 34 mm of protrusion of the stud above the nut after tension is applied.
Install Tooling (A) onto the studs for the crankshaft main bearing cap. Tighten the threaded collar of Tooling (A). Loosen the threaded collar of Tooling (A) by 1 1/2 turns. Attach Tooling (B) onto Tooling (A). Attach Tooling (C) onto Tooling (D). Apply approximately 135 MPa (19580 psi) of pressure to Tooling (B). Use the drive on Tooling (A) in order to tighten the nuts for the crankshaft main bearings. Release the pressure on Tooling (A). Reapply approximately 135 MPa (19580 psi) of pressure to Tooling (A). Recheck nuts (3) for tightness. Remove Tooling (A).
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Illustration 11 g03350574
Start at the front of the engine and tighten bolts (3) on the left side of the cylinder block to a torque of 100 ± 20 N·m (74 ± 15 lb ft).
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Illustration 12 g03350574
Start at the front of the engine and tighten bolts (3) on the right side of the cylinder block to a torque of 530 ± 70 N·m (391 ± 52 lb ft).
Start at the front of the engine and tighten bolts (3) on the left side of the cylinder block to a torque of 530 ± 70 N·m (391 ± 52 lb ft).
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Illustration 13 g01212026
Install side cover (2). Install bolts (1). Repeat for the remaining side covers on both sides of the engine.