Kubota WSM STV32 User Manual

STV32 · STV36 · STV40, WSM ENGINE
1-S4
2. SERVICING SPECIFICATIONS
ENGINE BODY
Item Factory Specification Allowable Limit
Cylinder Head Surface Flatness 0.05 mm / 500 mm
0.0020 in. / 19.69 in.
Compression Pressure
(When Cranking with Starting Motor)
3.53 to 4.02 MPa /
290 (rpm)
36 to 41 /
290 (rpm)
512 to 583 psi /
290 (rpm)
2.55 MPa /
290 (rpm)
26 /
290 (rpm)
370 psi /
290 (rpm)
Difference among
Cylinders
10 % or less
Top Clearance 0.55 to 0.70 mm
0.0217 to 0.0276 in.
Valve Clearance (When Cold) 0.18 to 0.22 mm
0.0071 to 0.0087 in.
Valve Seat Width (Intake) 2.12 mm
0.0835 in.
Width (Exhaust) 2.12 mm
0.0835 in.
Valve Seat Angle (Intake) 1.047 rad
60
Angle (Exhaust) 0.785 rad
45
Valve Face Angle (Intake) 1.047 rad
60
Angle (Exhaust) 0.785 rad
45
Valve Stem to Valve Guide Clearance 0.040 to 0.070 mm
0.00157 to 0.00276 in.
0.1 mm
0.0039 in.
Valve Stem
(O.D.)
7.960 to 7.975 mm
0.31339 to 0.31398 in.
Valve Guide
(I.D.)
8.015 to 8.030 mm
0.31555 to 0.31614 in.
Valve Recessing Protrusion 0.05 mm
0.0020 in.
Recessing 0.15 mm
0.0059 in.
0.4 mm
0.0157 in.
KiSC issued 04, 2006 A

Kubota WSM STV32 Specifications

General

Brand	Kubota
Model	WSM STV32
Category	Tractor
Language	English