GR2100EC, WSM
ENGINE
1-S42
Correcting Valve and Valve Seat
A
Before correcting the valve and seat, check the valve
stem and the I.D. of valve guide section, and repair them
if necessary.
A
After correcting the valve seat, be sure to check the valve
recessing.
1) Correcting Valve
1. Correct the valve with a valve refacer.
2) Correcting Valve Seat
1. Slightly correct the seat surface with a 0.785 rad (45 ) valve
seat cutter (Code No. 07909-33102).
2. Fitting the valve, check the contact position of the valve face
and seat surface with prussian blue. (Visual check) [ If the
valve has been used for a long period, the seat tends to come
in contact with the upper side of the valve face.]
3. Grind the upper surface of the seat with a 0.262 rad (15 )
valve seat cutter until the valve seat touches to the center of
the valve face (so that (a) equals (b) as shown in the figure)
4. Grind the seat with a 0.785 rad (45 ) valve seat cutter again,
and visually recheck the contact between the valve and seat.
5. Repeat steps 3 and 4 until the correct contact is achieved.
6. Continue lapping until the seated rate becomes more than 70
% of the total contact area.
Valve Lapping
1. Apply compound evenly to the valve lapping surface.
2. Insert the valve into the valve guide. Lap the valve onto its
seat with a valve flapper or screwdriver.
3. After lapping the valve, wash the compound away and apply
oil, then repeat valve lapping with oil.
4. Apply prussian blue to the contact surface to check the seated
rate. If it is less than 70 %, repeat valve lapping again.
A
When valve lapping is performed, be sure to check the
valve recessing and adjust the valve clearance after
assembling the valve.
Valve face angle
Factory spec.
0.785 rad
45
Valve seat angle
Factory spec.
0.785 rad
45
(1)
Valve Seat Cutter
(a)
Identical Dimensions
(A)
Check Contact
(b)
Valve Seat Width
(B)
Correct Seat Width
(c)
0.262 rad (15 )
(C)
Correct Seat Surface
(d)
0.785 rad (45 )
(D)
Check Contact
0000003400E
0000000881E
KiSC issued 04, 2006 A
Содержание WSM GR2100EC
Страница 1: ...GR2100EC WORKSHOP MANUAL KiSC issued 04 2006 A ...
Страница 7: ...GR2100EC WSM SAFETY INSTRUCTIONS 5 0000009633E KiSC issued 04 2006 A ...
Страница 8: ...GR2100EC WSM SAFETY INSTRUCTIONS 6 0000009634E KiSC issued 04 2006 A ...
Страница 11: ...GR2100EC WSM DIMENSIONS 9 DIMENSIONS 0000009634E KiSC issued 04 2006 A ...
Страница 12: ...G GENERAL KiSC issued 04 2006 A ...
Страница 65: ...1 ENGINE KiSC issued 04 2006 A ...
Страница 129: ...2 TRANSAXLE KiSC issued 04 2006 A ...
Страница 179: ...3 BRAKES KiSC issued 04 2006 A ...
Страница 189: ...4 FRONT AXLE KiSC issued 04 2006 A ...
Страница 190: ...CONTENTS 1 STRUCTURE 4 M1 KiSC issued 04 2006 A ...
Страница 208: ...5 STEERING KiSC issued 04 2006 A ...
Страница 209: ...CONTENTS 1 HYDRAULIC CIRCUIT 5 M1 2 STEERING CONTROLLER 5 M2 3 STEERING CYLINDER 5 M4 KiSC issued 04 2006 A ...
Страница 226: ...6 HYDRAULIC SYSTEM KiSC issued 04 2006 A ...
Страница 251: ...7 ELECTRICAL SYSTEM KiSC issued 04 2006 A ...
Страница 253: ...GR2100EC WSM ELECTRICAL SYSTEM 7 M1 1 WIRING DIAGRAM 0000009632E KiSC issued 04 2006 A ...
Страница 281: ...8 MOWER KiSC issued 04 2006 A ...
Страница 282: ...CONTENTS 1 POWER TRANSMISSION 8 M1 2 LIFTING MECHANISM 8 M2 KiSC issued 04 2006 A ...