New Holland 667TA/EBF, Руководство по ремонту, Страница: 101 / 150

2-83
87519804 NA Issued 11-06 Bur
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
CHECKING THE ECCENTRIC LIFT AND BEARING
SURFACE
STEP 47
BS06K266 Figure 2-139
Check camshaft with a micrometer (1) the bearing
surface (2) measurement must not have greater than
0.04 mm (0.0016 in.) of wear otherwise replace
camshaft. Also check the eccentric (lobe) lift (3),
which must be equal to 7.582 mm (0.2985 in.) for
exhaust eccentric (lobes). And 6.045 mm (0.2380 in.)
for intake eccentrics (lobes). If different values are
found than specifications replace the camshaft.
Check the diameter of camshaft support journals with
a micrometer (1) on two axis perpendicular to each
other.
BEARINGS
STEP 48
BS06K267 Figure 2-140
The camshaft bearings (2) must be force-fitted into
their respective seats.
The inner surfaces must show no traces of seizing or
wear.
Use a bore gauge (3) to measure the diameter of
f r o n t a n d r e a r b e a r i n g s ( 2 ) a n d o f c a m s h a f t
intermediate seats (1).
M e a s u r e m e n t s m u s t b e t a k e n o n t w o a x i s
perpendicular to each other.
BS06K268 Figure 2-141
MAIN FEATURES OF CAMSHAFT BEARINGS AND THEIR RESPECTIVE SEATS
B-DIMENSIONS AFTER DRIVING THE BEARING
1
3
2
3
2
1
B
A
A