Table 4-28. Cylinder Bore Wear Limits

TM 9-2815-210-34-2-2

FRAME 2

NOTE

Cylinder bores (2) in crankcase (1) are machined to

t w o different sizes. Cylinder sleeves are also machined

t o two different sizes to fit different size cylinder bores.

T h e two sizes of cylinder bores and cylinder sleeves are

called "Y" and "Z".

A l l six cylinder bores (2) are not always the same size.

C y l i n d e r bores (2) and cylinder sleeves are called by

n u m b e r s one to six counting from front to rear of

crankcase.

Look

at left side of crankcase (1) opposite each cylinder bore (2) about one

inch

below top of crankcase. The letter "Y" opposite a cylinder bore means

this

is a Y-size cylinder bore. The letter "Z" opposite a cylinder bore means

this

is a Z-size cylinder bore.

NOTE

Readings must be within limits given in table 4-28. If

r e a d i n g s are not within given limits, throw away part

and get a new one.

M e a s u r e inside diameter of all six cylinder bores (2). Note this measurement

a n d the number cylinder it was taken from.

GO TO FRAME 3

Table 4-28. Cylinder Bore Wear Limits

Size and Fit

Index

of New Parts

Wear Limit

Number

I t e m / P o i n t of Measurement

(inches)

Y - s i z e cylinder bore inside diameter

4 . 7 5 1 6 to 4.7520

None

Z - s i z e cylinder bore inside diameter

4.7511 to 407515

None