New Holland 667TA/EBF, Repair Manual

Page: 100 / 150

2-82
Issued 11-06 Bur 87519804 NA
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
CHECKS AND SPECIFICATIONS ON ENGINE CRANKCASE
CHECKS AND MEASUREMENTS
STEP 45
BS06K264 Figure 2-137
After the engine has been disassembled, clean the
block thoroughly.
Check the crankcase carefully for cracks. Check the
condition of freeze plugs. They must be replaced if
they are rusty or their sealing properties are in doubt.
Inspect the cylinder bore surfaces, they must not
show traces of seizing, scoring, out-of-roundness,
taper or excessive wear.
Check the cylinder bore inner diameter (in order to
measure the amount of out-of-roundness, taper and
wear) a bore gauge (1) equipped with a dial indicator,
check the cylinder bore diameter (2).
IMPORTANT: If no ring gauge is available, use a
micrometer to perform the test.
STEP 46
BS06K265
Figure 2-138
Measurements must be taken for each cylinder, at
three different heights (1,2,3) of the bore and on two
planes perpendicular to each other. One parallel to
t h e e n g i n e l o n g i t u d i n a l a x i s ( A ) , t h e o t h e r
perpendicular (B), the greatest amount of wear is
usually found on the (B) plane, and during the first
measurement. When detecting out-of-roundness,
taper or wear, in the cylinder bore, they must be
bored and resurfaced. Cylinder bore reconditioning
must be done in standard increments of over sized
pistons and rings.
1
2
1
2
3
2
1
A
B