this article mainly introduces Caterpillar 311F LRR- JFT Crawler Excavator Engine Housing (front)-Remove


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Installation steps







pay attention to

Keep all the parts clean without impurities.

Impurities can cause rapid wear and shorten the service life of the components.



1. Ensure that all parts are clean and free from wear or damage. If necessary, replace all worn or damaged parts.







2. For engines with any accessory drive, if a new front housing is being installed, the plug (7) in position (Y) will be removed to maintain the lubrication of the accessory drive.

3. If removed but no longer installing the accessory driver, the oil channel in position (Y) must be plugged. Follow Step 3.a to

3.c, to keep the engine oil circulating.

a. Apply the tool (C) to the screw plug (7).

b . Install the plug (7) into the front housing (1).

c. Screw the plug (7) to a torque of 15N-m (133 lb in)
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4. Thoroughly clean the sealing cushion surface of the front housing (1) and the cylinder block.

5. If necessary, install the positioning pin (6) (not shown) onto the cylinder block.

6. Install the tool (B) to the position on the cylinder block (X).

7. Apply a thin layer of 3mm tool (A) onto the front housing (1), as shown in Figure 3.

8. Install the front housing (1) on tool (B) and positioning pin (6) (not shown).

9. Apply the tool (C) to the thread of the bolt (5).

10. Install the bolts (5) where available in the front housing (1) and tighten by hand.

11. Remove the tool (B) from the cylinder block.




12. Install the remaining bolts (5). Tighten the bolts to 25 N·m (221 lb in) in the order shown in Figure 5.

13. Install the camshaft gear. For the correct steps, see Disassembly and Assembly, "Camshaft gear-installation".

14. Install the fuel injection pump. See Disassembly and Assembly, "Fuel Fuel Pump-Installation" for the correct steps.

15. Install the engine oil pan. For the correct steps, see Disassembly and Assembly, "Engine oil pan-Removing".

16. Install accessory drives if necessary. For the correct steps, see Disassembly and Assembly, "Accessory Drive-Removing and installing".





17. If necessary, follow steps 17.a to 17. For c, to install the engine oil filler port (2).

a. Install the new O-ring seal (4) (not shown) on the engine oil fill port (2).

b. Install the engine oil fill port (2) on the front housing (1).

c. Install the bolts (3) into the engine oil fill port (2). Tighten the bolts to a torque of 25N-m (2211b in).







18. Install the cover plate (8) onto the front housing, if necessary. Follow steps 18.a to Step 18. And c to install the cover plate.

a. Install the new O-ring seal (10) onto the cover plate (8). Apply the tool (D) onto the O-ring seal (10).

b. Install the cover plate (8) on the front housing.

c. Install the bolts (9) to the cover plate and tighten the bolts to a torque of 25N-m (2211b in).

19. Install the fan drive device, if necessary. For the correct steps, see Disassembly and Assembly, "Fan Drive Removing and Installation".

End By: Fill the coolant to the cooling system. Refer to the Operation and Maintenance Manual, "Cooling System Coolant-Fill" for the correct procedures.
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