wsm L3400, Руководство по ремонту

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1-S44
L2800, L3400, WSM ENGINE
Valve Seating
1. Coat the valve face lightly with prussian blue and put the valve on
its seat to check the contact.
2. If the valve does not seat all the way around the valve seat or the
valve contact is less than 70 %, correct the valve seating as
follows.
3. If the valve contact does not comply with the reference value,
replace the valve or correct the contact of valve seating.
W1028219
Correcting Valve and Valve Seat
NOTE
■
• Before correcting the valve and seat, check the valve stem
and the I.D. of valve guide section, and repair them if
necessary.
• 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 1.047 rad (60 °) (intake
valve) or 0.785 rad (45 °) (exhaust valve) seat cutter (Code No.
07909-33102).
2. Resurface the seat surface with a 0.523 rad (30 °) valve seat
cutter to intake valve seat and with a 0.262 rad (15 °) valve seat
cutter to exhaust valve seat so that the width is close to specified
valve seat width (2.12 mm, 0.0835 in.).
3. After resurfacing the seat, inspect for even valve seating, apply a
thin film of compound between the valve face and valve seat, and
fit them with valve lapping tool.
4. Check the valve seating with prussian blue. The valve seating
surface should show good contact all the way around.
W1028350
Valve seat width Factory spec.
2.12 mm
0.0835 in.
(1) Correct
(2) Incorrect (3) Incorrect
(a) Identical Dimensions
(b) Valve Seat Width
(c) 0.523 rad (30 °) or 0.262 rad (15 °)
(d) 0.262 rad (15 °) or 0.523 rad (30 °)
(e) 0.785 rad (45 °) or 1.047 rad (60 °) A : Check Correct
B : Correct Seat Width
C : Check Contact
KiSC issued 08, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland