Usage:
3606 (8RB553-UP),
G3606 (3XF31-UP),
3608 (6MC332332-332, 6MC461-Up),
G3608 (4WF26-Up),
3612 (9RC52-52, 9RC174-Up),
G3612 (1YG54-Up),
3616 (1PD24-24, 1PD213-UP),
G3616 (4CG37-Up) Engines
- SUPPLEMENT: 08/01/97
Engine News; August 1995; Page 15; "New Crankshaft Main Bearing Installation Procedure"
In Step 9, and incorrect part number is given for the Thread Lubricant. The correct part number is 6V-4876. Please make note of this correction in the applicable Disassembly And Assembly modules.
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Reference: Service Manual Module, SENR3600-01, Disassembly And Assembly 3606 and 3608 Diesel Engines.
Service Manual Module, SENR4259-02, Disassembly And Assembly G3606 and G3608 Engines.
Service Manual Module, SENR3594-02, Disassembly And Assembly 3612 and 3616 Diesel Engines.
Service Manual Module, SENR5535-02, Disassembly And Assembly G3612 and G3616 Engines.
This article replaces the article titled "Main Bearing Cap Installation Procedure", that appeared on Page 10 of the June 1995 issue of Engine News.
Effective with the above engine serial numbers, the crankshaft main bearing installation procedure has changed. Make note of this new procedure in the Reference Service Manual Modules.
Install Crankshaft Main Bearings 1203-012
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NOTICE The bearing has a location tab. When viewed from the flywheel, counterclockwise rotation is required for bearing upper half installation. Be sure the tab is properly seated in its groove. Be sure the tab does not shear in the groove.
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NOTE: If the main bearing cap studs were removed, use a 2.00 - 12 Taper Lock Tap to clean the threads in the cylinder block prior to installing the studs. Tighten the studs to 100 ± 20 N·m (75 ± 15 lb ft).
1. Use a clean cloth to wipe main bearing upper half. Put clean engine oil on the bearing upper half. Use tool (A) to "roll" main bearing upper half (1) into the cylinder block.
NOTE: (3606, G3606, 3612, G3612) The No. 4 main bearing journal does not have an oil hole. Tool (A) cannot be used to roll in the main bearing upper half. It is necessary to push the main bearing upper half into position by hand.
NOTE: (3608, G3608, 3616, G3616) The No. 5 main bearing journal does not have an oil hole. Tool (A) cannot be used to roll in the main bearing upper half. It is necessary to push the main bearing upper half into position by hand.
2. Install thrust plates (2). If necessary, carefully pry the crankshaft forward or backward so thrust plates (2) can be rolled into position in the cylinder block.
NOTE: (3606, G3606, 3612, G3612) Install thrust plates on main bearing No. 7 (rear main bearing) for rear driven equipment. Install the thrust plates on main bearing No. 1 (front main bearing) for front driven equipment.
NOTE: (3608, G3608, 3616, G3616) Install thrust plates on main bearing No. 9 (rear main bearing) for rear driven equipment. Install the thrust plates on main bearing No. 1 (front main bearing) for front driven equipment.
3. Use a clean cloth to wipe main bearing lower half and half bore in bearing cap. Be sure there is no thread lubricant present on the main bearing lower half or on the bearing cap. Install main bearing lower half (4) in the main bearing cap. Be sure the tab on the back of the bearing is engaged with the slot in the main bearing cap.
4. Put clean engine oil on the main bearing lower half. Be sure not to put engine oil on the back side of the bearing.
5. Use tool (B) to raise the main bearing cap on the studs.
6. Be sure dowel (3) engages with the hole in the cylinder block. The dowel extends from the main bearing cap 10.0 ± 0.5 mm (.39 ± .02 in).
7. Install washers and nuts to hold the main bearing cap. Tighten the nuts securely by hand. Remove tool (B) from the main bearing cap.
8. Remove pins, part of tool (B), from the bearing cap.
9. Put 4C-5593 Thread Lubricant on the washer face and threads of each main bearing cap saddle bolt (5).
10. Install main bearing cap saddle bolts (5). Do not tighten the saddle bolts on the left side of the engine (side opposite the bearing tab).
11. Tighten the main bearing cap saddle bolt on the right side of the engine (bearing tab side) to 215 ± 40 N·m (160 ± 30 lb ft).
NOTE: Be sure the threaded collar is inserted into the tensioner cylinder and the retainer is installed.
12. Put tensioner cylinders and threaded collars [tool (C)] in position on the tray under the main bearing studs. Put the reaction sleeve, or pedestal, in place on the stud over the main bearing cap nut and secure with dowel handle.
13. Fasten the link to the tensioner and install the spring clips.
14. Use the handling equipment to raise the tensioner cylinder off the tray. Place a level [tool (D)] on the tensioner cylinder. Use adjusting screws on handling equipment to level the tensioner cylinder. Remove the level [tool (D)].
15. Use the handling group to lift the tensioner to the stud and start the threaded collar onto the stud. Hand tighten the threaded collars on the main bearing cap studs.
16. Attach the hoses from the pump to the tensioner cylinders.
17. Tighten the threaded collar with a 1/2 inch drive ratchet. Tighten; then back off 1/4 turn.
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Before running the pump, be sure all connections are secure. Be sure all hoses are in good condition. Oil escaping under high pressure can cause personal injury.
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18. Run the pump until a pressure of 65 000 ± 2400 kPa (9425 ± 350 psi) is registered on the gauge. This will put tension on the studs so the nuts can be tightened.
19. Use dowel handle [part of tooling (C)] to tighten each nut hand tight. The nut should turn 5 to 8 holes. If the nut turns more or less, begin the procedure again.
20. Slowly release the hydraulic pressure.
21. Repeat Steps 18 through 20.
22. Remove tooling (B) and (C).
23. After the installation of the main bearing, be sure the crankshaft can be turned.
24. Tighten the main bearing cap saddle bolt on the left side of the engine (side opposite bearing tab) to 215 ± 40 N·m (160 ± 30 lb ft).
25. Tighten the main bearing cap saddle bolt on the right side of the engine (bearing tab side) to 1825 ± 175 N·m (1350 ± 130 lb ft).
26. Tighten the main bearing cap saddle bolt on the left side of the engine (side opposite bearing tab) to 1825 ± 175 N·m (1350 ± 130 lb ft).
NOTE: An alternate method of torque for Steps 25 and 26 is included in Steps 27 and 28.
27. Tighten the main bearing cap saddle on the right side of the engine (bearing tab side) to 450 ± 50 N·m (330 ± 37 lb ft). Then, turn the bolt an additional 120 ± 5 degrees.
28. Tighten the main bearing cap saddle on the left side of the engine (side opposite bearing tab) to 450 ± 50 N·m (330 ± 37 lb ft). Then, turn the bolt an additional 120 ± degrees.
End by:
a. measure and record crankshaft deflection
b. install crankcase explosion relief valves
c. install centrifugal oil filters
d. install oil filler and oil level gauge
e. install crankcase access covers
f. connect the drive coupling to the flywheel
g. check and align engine and driven equipment
h. install flywheel guards.