DISASSEMBLY AND ASSEMBLY D346 Caterpillar

NOTE: Earlier engines have studs and later engines have bolts securing cylinder heads to engine block.

preparatory step:

a) remove pistons

1. Install tool setup (A) in cylinder liner. Unseat the liner from bore in cylinder block. Remove the tool setup.

2. Install slide hammer assembly (B), and remove cylinder liner from cylinder block.

3. Remove the two spacer plate-to-cylinder block mounting bolts from timing gear end of spacer plate.

4. Using four 3/8"-16NC forcing screws separate the spacer plate from cylinder block.

5. Remove the spacer plate and spacer plate gasket.

Install Cylinder Liner

NOTE: Before installing cylinder liners, spacer plate gasket must be replaced. Refer to topic SPACER PLATE.

1. Install new O-ring seals on cylinder liner. Lubricate seals and mating bore in cylinder block with liquid soap to ease installation.

2. Apply 7M7260 Liquid Gasket Material to the underside of cylinder liner flanges that contact the cylinder block. Do not apply gasket material to the cylinder block.

3. Using plate (A), drive the cylinder liner into cylinder block.

concluding steps:

a) measure cylinder liner projection

b) install pistons

Checking Cylinder Liner Projection

1. Make certain that top plate (4) and the cylinder liner flange are clean.

2. Use 3/4"-10 NC bolts, 3 in. (76,2 mm) long, with two 7M7875 Washers (3) on each bolt to secure top plate (4) to the cylinder block. Place two bolts with washers on each side of the cylinder liner. Tighten the bolts evenly, in four steps; 10 lb. ft (1,9 mkg), 25 lb. ft. (3,5 mkg), 50 lb. ft. (6,9 mkg) and finally to 70 lb. ft. (9,7 mkg).

NOTE: Use cylinder head nuts, washers and spacers on engines with cylinder head studs.

SECURING TOP PLATE TO CYLINDER BLOCK (Typical Example)
1-3H465 Plate. 2-1P2396 Adapter plate. 3-Cylinder head bolt washers. 4-Top plate.

3. Invert 3H465 Plate (1) from an 8B7548 Push Puller, in the center of adapter plate (2). Center crossbar (6) on the inverted 3H465 Plate. Using two 3/4"-10 NC bolts 7 in. (177,8 mm) long and two 3H465 Plates, secure the crossbar to the cylinder block as illustrated. Tighten the bolts evenly, in four steps; 5 lb. ft. (0,7 mkg), 15 lb. ft. (2,1 mkg), 25 lb. ft. (3,5 mkg) and finally to 50 lb. ft. (6,9 mkg). Distance from bottom edge of crossbar to top plate, must be the same on both sides of cylinder liner.

4. Zero the dial indicator using the back of 1P5507 Gauge with dial indicator (5) mounted in 1P2402 Block (7).

5. Measure liner projection as close as possible to the clamping area and at four locations around the liner. The liner projection must be within .002-.0076 in. (0,05-0,19 mm) and the four measurements should not vary more than .001 in. (0,03 mm). The average projection between adjacent cylinders must not vary more than .001 in. (0,03 mm).

MEASURING LINER HEIGHT PROJECTION (Typical Example)
5-Dial indicator. 6-Crossbar. 7-1P2402 Block.

NOTE: If liner projection varies from point to point around the liner, rotate the liner to a new position withing the bore. If still not within specified limits, move liner to a different bore.

NOTE: Measure and check the following dimensions when installing new parts. With all dimensions correct, proceed with the above listed Steps.

a. Top plate thickness .5142 ± .0010 in. (13,061 ± 0,025 mm).

b. Top plate gasket thickness, .008 ± .001 in. (0,20 ± 0,05 mm). (All surfaces must be clean and dry when instaling gasket.)

c. Cylinder liner flange thickness, .5252-.5268 in. (13,340-13,381 mm).

Finally, liner projection can be adjusted by machining the contact face of the cylinder block with use of the 8S3140 Cylinder Block Counterboring Tool Arrangement. Form FM055228 is part of the cylinder block counterboring tool arrangement and gives tool usage information.

Shims to various thicknesses also are available to adjust liner projection.