INSPECTION - TM-10-3930-638-24-P0784

TM 10-3930-638-24&P

4-2. ENGINE MAINTENANCE (cont)

a. Cylinder Block Assembly (cont).

REMARKS

ITEM

ACTION

LOCATION

STEP

INSPECTION (cont)

c. Measure cylin-

Check taper and out-of-roundness with

der sleeve

bore gauge. If taper or out-of-roundness

(cont)

exceeds 0.002 inch, replace block

bores

Cylinder sleeve (1)

a. Inspect

Replace if smooth, shiny surface along

complete length or heavy vertical lines

fringed by metal transferring from one

spot to another are observed

WARNING

Blue Vitriol solution contains acid. Wear safety glasses to protect

eyes from accidental splashing and avoid splashing solution on

skin. If solution is splashed on your skin or in your eyes, wash

off immediately with water and get medical aid.

b. Check chrome

Wet inside of sleeve with cotton swab

plating

saturated with Blue Vitriol solution. If

bright copper color is observed, replace

sleeve. Rinse tested surfaces with water

after check

NOTE

If Blue Vitriol solution cannot be obtained from druggist, a satis-

` factory solution can be made from copper sulfate crystals avail-

able at hobby stores or pharmacies. To prepare solution: add one

tablespoon fresh battery acid to one cup water; add 1/2 level

teaspoon copper sulfate crystals to solution; stir with plastic spoon

until crystals are dissolved.

c. Check sleeve

Use inside micrometer or bore gage. Check

inside diameter below top ring location and at several

for taper

points down length. Replace if taper is

more than 0.002 inch

d. Check sleeve

Use bore gage. Measure lengthwise just be-

out-of-round-

low top ring location at four points 90

ness

degrees from each other. Replace if out-

of-roundness exceeds 0.001 inch. (Use

micrometer to check bore gage.)

Oil falter to block

Inspect

Replace if bent or threads damaged

adapter (5) and

stud (3)

4-6