G343 ENGINE Caterpillar


Pistons

Usage:

Remove Pistons

preparatory steps:

a) remove cylinder head assembly

b) remove oil filter base

c) remove oil cooler

1. Remove the oil level gauge and gauge tube.

2. Remove the exhaust manifold water supply line and oil cooler water outlet elbow.

3. Remove the cylinder block inspection plate.

4. Clean the carbon ridge from the top of the cylinder liners.

5. Rotate the crankshaft clockwise (as viewed from the front of the engine) as necessary to gain access to the connecting rod cap.

6. Remove the connecting rod caps and retaining bolts.

7. Push the piston upward until the rings clear the cylinder liner. Lift the piston and connecting rod from the liner.

8. Repeat Steps 4 through 7 for the remaining pistons.

Install Pistons

1. Lubricate the piston, rings, connecting rod bearings, and cylinder walls with clean SAE 30 engine oil.

2. Using compressor (A), install the piston so that the "V" mark on the piston is aligned with the "V" mark on the spacer plate.

3. Install the connecting rod bearing, cap and bolts. Lubricate the bolt threads with clean SAE 30 engine oil. Tighten both nuts initially to 50 ± 5 lb. ft. (6,9 ± 0,7 mkg) plus 180° ± 10° additional turn.

NOTE: When installing the connecting rod caps, the numbered surfaces must mate.

4. Install the cylinder block inspection plate.

5. Install the oil cooler water outlet elbow and exhaust manifold water supply line.

6. Install the oil level gauge and gauge tube.

concluding steps:

a) install the oil cooler

b) install the oil filter base

c) install the cylinder head assembly

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