3306 VEHICULAR ENGINE FOR D5B, D6D & D7G TRACTORS – Pistons

Remove Pistons

START BY:

a) remove oil pan plate

b) remove oil pump

c) remove cylinder head

1. Remove the ring of carbon from the inner surface of the cylinder liners.

2. Turn the crankshaft until two pistons are at bottom center. Remove connecting rod caps (1) from the two connecting rods.

3. Put rubber hose or tape over the threads of the connecting rod bolts. This will prevent damage to the crankshaft when the pistons are removed.


NOTICE

Do not let the connecting rods hit the bottom of the cylinder liner or crankshaft when the pistons are removed or installed.


4. Push the piston and connecting rod away from the crankshaft until the piston rings are above the cylinder liner. Remove the two pistons (2) and connecting rods from the engine.

5. Keep each connecting rod cap with its respective connecting rod and piston. Put identification on each connecting rod as to its location in the engine.

6. Do Steps 2 through 5 for the removal of the other pistons.

Install Pistons

Turn the crankshaft until the bearing journals for the pistons to be installed are at bottom center.

2. Put clean engine oil on the crankshaft journals and on the inside of the cylinder liners. Put clean engine oil on the piston rings and connecting rod bearings.

3. Move the piston rings on the piston until the ring openings are approximately 90° apart.


NOTICE

Never install tool (A) (the ring compressor) without the use of the cylinder liner as a guide. Damage to the piston rings can be the result.


4. Put tool (A) in position on the cylinder liner as shown. Put the connecting rod and piston in the same cylinder liner from which it was removed and into the ring compressor. Make sure the “V” mark on the piston is in alignment with the “V” mark on the cylinder block.

5. Push the piston into position while the connecting rod is put into position over the crankshaft.

6. Put clean engine oil on bearings, bolt threads and surfaces of the nuts that make contact with the connecting rod caps. Put caps (1) in position on the connecting rods and install the nuts. Tighten the nuts to a torque of 30 ± 3 lb.ft. (40 ± 4 N·m.). Put a mark on each nut and the end of each bolt. Tighten the nuts 90° more.


NOTICE

When the connecting rod caps are installed, make sure the number on the side of the cap is next to and respective with the number on the side of the connecting rod.


7. Follow Steps 1 through 6 for the installation of the other pistons.

END BY:

a) install cylinder head

b) install oil pump

c) install oil pan plate

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