New Holland TK65, Service Manual

Page: 32 / 41

22 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.381.00 -- 05 -- 2001
CYLINDER HEAD DATA
mm (in.)
CYLINDER HEAD DATA
Bore 100 Bore 104
Cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . with valve seats cut directly in the
casting and press--fitted steel valve
guides.
Original height of cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 (3.622)
Maximum face re--grinding depth that can be removed from the
cylinder head in the event of reboring . . . . . . . . . . . . . . . . . . . . . . . 0.5 (0.0197)
Diameter of standard valve guide bores in head . . . . . . . . . . . . . . 13.950 to 13.983 (0.5492 to 0.5505)
Outside diameter of standard valve guides . . . . . . . . . . . . . . . . . . . 13.993 to 14.016 (0.5509 to 0.5518)
Guide interference fit in bores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.010 to 0.066 (0.0004 to 0.0026)
Inside diameter of valve guide (fitted in head) . . . . . . . . . . . . . . . . 8.023 to 8.043 (0.3159 to 0.3166)
Valve stem diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.985 to 8.000 (0.3144 to 0.315)
Assembly clearance between valve stem and guide . . . . . . . . . . . 0.023 to 0.058 (0.0009 to 0.0023)
Maximum permitted wear endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . 0.13 (0.0005)
Maximum run--out of valve guided on its stem measured through
360
o
with dial gauge contact point resting on valve head contact
band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03 (0.0012)
Valve guide oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 (0.0079)
Valve seat angle in head:
-- inlet valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60
o
± 5’
-- exhaust valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
o
± 5’
Valve face angle:
-- inlet valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60
o
30’ ± 7’
-- exhaust valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
o
30’ ± 7’
Valve head diameter:
-- inlet valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45.300 to 45.500 (1.7835 to 1.7913)
-- exhaust valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.500 to 37.750 (1.4764 to 1.4862)
Valve stand--in relative to cylinder head face . . . . . . . . . . . . . . . . . 0.7 to 1.0 (0.0275 to 0.0394)
Maximum permissible valve stand--in . . . . . . . . . . . . . . . . . . . . . . . . 1.3 (0.0512)
Inlet and exhaust valve springs:
-- free length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44.6 (1.7559)
-- length with valve closed, under load of 256 to 284 N
(26.1 to 28.9 kg, 57.54 to 63.71 lbs.) . . . . . . . . . . . . . . . . . . . . . . 34 (1.3386)
-- length with valve open, under load of 502 to 554 N
(51.2 to 56.5 kg, 112.88 to 124.56 lbs.) . . . . . . . . . . . . . . . . . . . . 23.8 (0.937)
Injector protrusion relative to head face:
D
BOSCH injector no. 500307714 and 500317389 . . . . . . . . . . . . 0.3 to 1.1 (0.0118 to 0.0433)