2014/12/12 Caterpillar

Engine:

All 3600

All C280

All G3600

Engine News SEBD9844, 06 February 2013, "Proper Installation of Connecting Rod Bearings for G3600, 3600, and C280 Engines". Disregard the previous article. Refer to the information below.

The 227-2902 Bearing is harder than the previous bearing, therefore additional caution must be taken during the assembly process to ensure cleanliness. The assembly steps listed here will help prevent contamination of the bearing surface.

Note: For G3600 low compression engines, the 227-2902 Bearing is relatively new. For these engines, the 227-2902 Bearing is a direct replacement for the 192-7870 Connecting Rod Bearing. The change is effective at the factory with the engine serial numbers that are listed in Table 1.

Table 1

Effective Serial Numbers

S/N:4ZS1479-UP

S/N:BEN00676-UP

S/N:BKE00564-UP

S/N:BLB00668-UP

Instructions to Ensure Cleanliness During Assembly

• Handle parts and store parts properly.

• Inspect all parts for contaminants and defects.

• Keep all parts free of contaminants.

Refer to Table 2 in order to select the correct bearing.

Table 2

Connecting Rod Bearings
Part Number	Description
227-2902	Standard Size Bearing
262-7162	0.50 mm (0.02 inch) Undersized
262-7163	1.0 mm (0.04 inch) Undersized

1. Only install the bearing in a clean environment. Avoid open doors or fans that might allow dust to be blown into the crankshaft and rod bearing area. If the engine is not in a building, a temporary wall may be necessary in order to control the environment.

2. If the crankshaft has been turned or polished, the oil passage plugs must be removed. Clean the threaded holes and oil passages thoroughly with a brush and solvent. A new 7W-1632 Plug must then be installed and staked. Apply Loctite Dri- Loc 200 to all of the male threads and all around the circumference of the threads.

   Torque for the plug ... 300 ± 40 N·m (220 ± 30 lb ft)

3. Rotate the crankshaft in order to position the piston being removed at TDC. Install the 145-5190 Piston Support or the 156-7160 Piston Support As in place of the piston cooling jet.

4. During the removal process, remove the connecting rod cap. Remove the connecting rod bolts.

5. Rotate the crankshaft journal away from the connecting rod in order to provide clearance for cleaning the connecting rod bore.

   When the journal is clear of the connecting rod, cover the journal with a clean cloth and tape the cloth to the journal. This precaution will prevent debris from landing on the journal or from entering an oil passage.

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Illustration 1	g02425997
(1) Connecting rod bore (2) Backs of rod bearing (3) Connecting rod bearing surfaces

6. Make sure that the crankshaft rod bore (1) and the backs of rod bearing (2) are clean and dry. Clean the crankshaft rod bore and the backs of the bearing with cleaning fluid in order to remove any oil or rust preventative. Refer to table 3. Install the bearing dry. Refer to Illustration 1.
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   Table 3

   Approved Cleaning Fluids

   Brake Clean

   Solvent 140

   Mineral Spirits

   Agitene

7. Coat the crankshaft and connecting rod bearing surfaces (3) with SAE 40 engine oil before installing the piston and rod assembly.

   Note: Do not use white lithium grease or heavy assembly lube. These lubricants will hold debris in place.

   The hard surface of the 227-2902 Bearing, unlike the previous bearing, will not allow debris to be imbedded. Debris on the bearing or crankshaft journal can lead to bearing failure.

8. Torque the rod bolts by following the latest tightening procedure. Refer to Engine News, SEBD9967, 14 November 2014, "A New Torque Procedure for Connecting Rod Bolts Is Now Used on 3600, G3600, and C280 Engines " and Specifications Manual, RENR5907, "Connecting Rod", "Tightening Procedure for Connecting Rod Bolts".

9. Run the prelube pump for at least two hours. This procedure will flush debris that was trapped in the crankshaft and bearing area during the overhaul process.

10. After the first hour of prelube, rotate the engine with the barring group at least one revolution every 15 minutes.

11. Start the engine and run at the lightest load possible and at 750 RPM for approximately ten minutes.

12. Shut down and remove the turbo screens if installed. Then restart and resume warm-up.

13. After the initial ten minutes increase the speed to the normal operating rpm. After the engine jacket water and engine oil have reached a minimum of 50° C (122 ° F), load the engine according to the normal site process.

    If the engine has had a major overhaul involving new rings, liners, and or pistons, load the engine in 15 minute load steps. Step the load at 25, 50, and 75 percent of full load.

14. If all engine parameters are still normal, operate at full load as needed.