Basic Engine -807640166

TM 9-2320-312-24-2

Testing and Adjusting Section

Basic Engine

Refer to Special Instruction, SMHS7606, "Use

of 1P-4000 Line Boring Tool Group" for the

instructions that are needed to use the 1P-4000

Line Boring Tool Group. The 1P-4000 Line Boring

i01432013

Tool Group is used in order to check the alignment

Piston Ring Groove - Inspect

of the main bearing bores. The 1P-3537 Dial

Bore Gauge Group can be used to check the

SMCS Code: 1214-040

size of the bore. Refer to Special Instruction,

GMG00981, "1P-3537 Dial Bore Gauge Group" for

The 186-0190 Piston Ring Groove Gauge Gp is

the instructions that are needed to use the 1P-3537

available to check the top ring groove in the piston.

Dial Bore Gauge Group.

Refer to the instruction card with the tool for the

correct use of the 186-0190 Piston Ring Groove

Gauge Gp.

i01854009

Cylinder Block - Inspect

i01284815

SMCS Code: 1201-040

Connecting Rod Bearings -

Table 24

Inspect

Required Tools

SMCS Code: 1219-040

Part

Part Name

Quantity

Number

The connecting rod bearings fit tightly in the bore

1P-3537

Dial Bore Gauge Group

in the rod. If the bearing joints are fretted, check

the bore size. This can be an indication of wear

because of a loose fit.

Connecting rod bearings are available with 0.25 mm

(0.010 inch) and 0.50 mm (0.020 inch) smaller

inside diameter than the original size bearings.

These bearings are for crankshafts that have been

ground.

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Main Bearings - Inspect

SMCS Code: 1203-040

g00285686

Illustration 78

Main bearings are available with 0.25 mm

1P-3537 Dial Bore Gauge Group

(0.010 inch) and a 0.50 mm (0.020 inch) smaller

inside diameter than the original size bearings.

If the main bearing caps are installed without

These bearings are for crankshafts that have been

bearings, the bore in the block for the main bearings

ground.

can be checked. Tighten the nuts on the bearing

caps to the torque that is given in Specifications,

Main bearings are also available with a larger

"Cylinder Block". Alignment error in the bores must

outside diameter than the original size bearings.

not be more than 0.08 mm (0.003 inch).

These bearings are used for the cylinder blocks

with the main bearing bore that is made larger than

The 1P-3537 Dial Bore Gauge Group can be used

the bore's original size. The size that is available

to check the size of the bore. Refer to Special

has a 0.50 mm (0.020 inch) outside diameter that is

Instruction, GMG00981, "1P-3537 Dial Bore Gauge

larger than the original size bearings.

Group" for the instructions that are needed to use

the 1P-3537 Dial Bore Gauge Group.