ISM, ISMe, and QSM11 – 001-007   Bearings, Thrust

WARNING  To reduce the possibility of personal injury, avoid direct contact of hot oil with your skin

WARNING  Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion, and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.

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

• Drain the lubricating oil. Refer to Procedure 007-037 in Section 7.
• Remove the lubricating oil pan. Refer to Procedure 007-025 in Section 7.

The Number 4 main bearing cap has thrust bearings. The cap is located with two dowel pins.

Remove the thrust bearings from the Number 4 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, Part Number 3163086, Part Number 3163087 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, Part Number 3163086, Part Number 3163087 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.

Use clean 15W-40 engine 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.

Make certain that the proper main cap capscrew torque procedure is used when torquing main bearings. The use of the improper torque procedure will damage the engine. Refer to Procedure 001-006 in Section 1.

Use a dial indicator to measure the crankshaft end clearance.

Crankshaft End Clearance

If the end clearance is not within the specifications, inspect the main bearing cap and thrust bearing surfaces in the cylinder block.

• Install the lubricating oil pan. Refer to Procedure 007-025 in Section 7.
• 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.

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