M11 Series – Service Manual – 001-007   Bearings, Thrust

Cummins® Engine Company, Inc., recommends replacing the thrust bearings when the main bearings are replaced.

Drain the lubricating oil. Refer to Procedure
007-037.

Remove the lubricating oil pan. Refer to Procedure
007-025.

The number four main bearing cap has thrust bearings. The cap is located with two dowel pins.

Remove the thrust bearings from the number four main bearing cap.

Mark the thrust bearings in the oil passage groove as being front or rear bearings.

CAUTION  Do not damage the crankshaft when removing the upper thrust bearings.

Use a blunt tool to remove the upper thrust bearings.

Use Lubriplate™ 105, or equivalent, to coat the upper thrust bearings.

Push the crankshaft toward the rear of the engine to install the rear thrust bearing, and to the front of the engine to install the front thrust bearing.

Install the upper thrust bearings in the number four main bearing saddle.

The grooves
must be toward the crankshaft.

Use Lubriplate™ 105, or equivalent, to coat the lower thrust bearings.

Install the lower thrust bearings in the number four main bearing cap as shown.

The grooves of the thrust bearing
must be toward the crankshaft. The locating dowels
must not protrude above the thrust bearing surface.

Use clean 15W-40 oil to coat the capscrew threads and on both sides of the washers.

Drain the excess oil from the capscrews before installing them in the cylinder block.

The main bearing caps are numbered one through seven from front to rear in the cylinder block. The caps
must be installed so the number on the cap matches the bearing saddle in the block. The lock tangs in the main bearing saddle and bearing cap
must be on the same side.

Install the main bearing caps.

CAUTION  The use of improper torque procedure will damage the engine.

Make sure the proper main cap capscrew torque procedure is used when torquing main bearings.

Tighten all older blocks (prior to engine serial number (ESN) 35011095) main bearing capscrew in alternating sequence to the following torque values:

All torque-to-yield blocks engine serial number (ESN) First 35011095) or blocks with TTY stamped on the rear engine serial number stamp pad
must be tightened in alternating sequence to the following torque values:

Use a dial indicator to measure the crankshaft end clearance.

If the end clearance is
not within the specifications, refer to M11 Series Shop Manual, Bulletin 3666075, to inspect the main bearing cap and thrust bearing surfaces in the cylinder block.

Install the lubricating oil pan. Refer to Procedure
007-025.

Fill the engine with lubricating oil. Refer to Procedure
007-037.

Operate the engine to normal operating temperature and check for leaks.

NOTE: The engine
must have adequate oil pressure within 15 seconds after starting. If the warning light indicating low oil pressure has
not gone out or there is no oil pressure indicated on a gauge within 15 seconds, shut off the engine immediately to avoid engine damage. Confirm the correct oil level is in the oil pan.