New Holland 667TA/EBF, Repair Manual

Page: 126 / 150

2-108
Issued 11-06 Bur 87519804 NA
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
CHECKING CYLINDER HEAD WATER SEAL
STEP 127
BS06K355 Figure 2-228
C h e ck t h e w a t e r s e a l b y m e a n s o f s u i t a b l e
equipment.
Use pump to feed water heated to 90° C (194° F) at a
pressure of 2 to 3 bar (29 to 43 psi.)
If leaks are detected from the freeze plugs, they must
be replaced by using a suitable beater for removal
and reassembling operations.
IMPORTANT: Prior to installing the freeze plugs,
apply water repellent sealant to them.
If leaks are detected from the cylinder head, the
cylinder head must be replaced.
CHECKING THE CYLINDER HEAD MATING
SURFACE
STEP 128
BS06K356
Figure 2-229
The plane of the supporting surface of the head (1) to
cylinder cluster is checked by means of a straight
edge (2) and a thickness gauge (3).
The warping found on the entire length of the cylinder
head must not be greater than 0.20mm (.0.008 in.).
If greater values are found, reface the cylinder head
according to values given in the next step.
STEP 129
BS06K357 Figure 2-230
The rated thickness "A" of the cylinder head is 105 ±
0.25mm (4.134 ± 0.0099 in.). Maximum allowed
metal removal must not exceed thickness "B" by
0.13 mm (0.005 in.).
IMPORTANT: After grinding, check valve sinking.
Regrind the valve seats if necessary, to obtain the
specified value
VALVES
BS06K358
Figure 2-231
INTAKE AND EXHAUST VALVE MAIN DATA
1
3
1
2