Servicing; Cylinder Head And Valves - Kubota WSM STV32 Workshop Manual

STV32 · STV36 · STV40, WSM

[4] SERVICING

(1) Cylinder Head and Valves

Cylinder Head Surface Flatness
1. Clean the cylinder head surface.
2. Place a straightedge on the cylinder head's four sides (A), (B),
(C) and (D) and two diagonal (E) and (F) as shown in the
figure.
Measure the clearance with a feeler gauge.
3. If the measurement exceeds the allowable limit, correct it with
a surface grinder.
A Do not place the straightedge on the combustion
chamber.
A Be sure to check the valve recessing after correcting.
Cylinder head surface
Allowable limit
flatness
Cylinder Head Flaw
1. Prepare an air spray red check (Code No. 07909-31371).
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
1-S46
ENGINE
0.05 mm
0.0020 in.
0000002081E
(3) White Developer
0000000875E
KiSC issued 04, 2006 A