Service manual

VALVES, VALVE SEAT AND GUIDE (Cont’d)
Reconditioning The Valve And Valve Seats (Cont’d)
Check the valve head depth in the cylinder head after
grinding the valves and seat. The correct specifications
are as follows[A]:
Intake – Standard 0.029 inch (0,74 mm)
Limit 0.05 inch (1,27 mm)
Exhaust – Standard 0.028 inch (0,71 mm)
Limit 0.047 inch (1,20 mm
Check the valve seat contact width [A]:
Intake – Standard 0.067 inch (1,70 mm)
Limit 0.087 inch (2,21 mm)
Exhaust – Standard 0.079 inch (2,0 mm)
Limit 0.098 inch (2,48 mm)
Valve Seat Insert
To remove the valve seat insert, put a bead of weld around
the inner face of the insert and allow to cool a few minutes,
then pry them out [B].
Press the new valve seat insert into the bore using a
hydraulic press.
After installation, grind the insert to the correct angle and
check the depth of the valve.
Valve Guide
The tools listed will be needed to do the following
procedure:
MEL1259 – Valve Guide Remover
Check the valve guides for wear with a dial indicator [C].
If the movement is more than the listed specifications,
replace the guide.
Intake – Standard 0.0015–0.0027 inch
(0,038–0,069 mm)
Limit 0.008 inch (0,2 mm)
Exhaust – Standard 0.0025–0.0038 inch
(0,064–0,96 mm)
Limit 0.010 inch (0,25 mm)
NOTE: Check the valve stem for wear before
replacing the valve guide [D].
A
B–08199
Depression
Contact
Width
C
B–08205
0.40 ”
(10 mm)
D
B–08204
Intake
Standard
0.3128–0.3134 ”
(7,946–7,961 mm)
Exhaust
Standard
0.3119–0.3124 ”
(7,921–7,936 mm)
Limit 0.310 ”
(7,88 mm)
–7–54–
853, 853H Loader
Service Manual
B
B–08201
Welding
Bead
Valve Seat
Insert