Sarvicing; Clinder Head And Valves - Kubota WSM OC60-E2 Workshop Manual

OC60-E2, OC95-E2, WSM

[3] SARVICING

(1) Clinder Head and Valves

Cylinder Head Surface Flatness
1. Thoroughly clean the cylinder head surface.
2. Place a straightedge on the cylinder head's four sides and two
diagonal as shown in the photo.
3. Measure the clearance with a thickness gauge.
4. If the measurement exceeds the allowable limit, correct it with
a surface grinder.
Do not place the straight edge on the combustion
chamber.
Cylinder head surface
Allowable limit
flatness
Cylinder Head Flaw
1. Prepare an air spray red check.
2. Clean the surface of the cylinder head with the detergent (2).
3. Spray the cylinder head surface with the red permeative liquid
(1). Leave it five to ten minutes after spraying.
4. Wash away the red permeative liquid on the cylinder head
surface with the detergent (2).
5. Spray the cylinder head surface with the white developer (3).
6. If flawed, it can be identified as red marks.
(1) Red Permetive Liquid
(2) Detergent
Valve Recessing
1. Clean the cylinder head, the valve face and seat.
2. Insert the valve into guide.
3. Measure the valve recessing with a depth gauge.
4. If the measurement exceeds the allowable limit replace the
valve.
5. If it still exceeds the allowable limit after replacing the valve,
replace the cylinder head.
Factory spec.
Valve recessing
Allowable limit
S-41
ENGINE
0.05 mm
0.0020 in.
0000009255E
(3) White Developer
00000007716E
0.60 to 0.85 mm
0.0236 to 0.0335 in.
1.3 mm
0.0512 in.
0000009257E