Kubota WSM User Manual

1-S5
ZD18(F) · ZD21(F) · ZD28(F), WSM
ENGINE
2. SERVICING SPECIFICATIONS
[D722-E-XFM5, D782-E-XFM5]
[1] ENGINE BODY
W1013874
Item Factory Specification Allowable Limit
Cylinder Head Surface Flatness – 0.05 mm
0.0020 in.
Top Clearance 0.50 to 0.70 mm
0.0197 to 0.0276 in.
–
Compression Pressure
Variance among Cylinders
2.84 to 3.24 MPa
29.0 to 33.0 kgf/cm
2
412 to 469 psi
–
2.26 MPa
23.0 kgf/cm
2
327 psi
10 % or less
Valve Clearance (Cold) 0.145 to 0.185 mm
0.00571 to 0.00728 in.
–
Valve Seat Width 2.12 mm
0.0835 in.
–
Valve Seat Angle 0.79 rad.
45°
–
Valve Face Angle 0.79 rad.
45°
–
Valve Recessing – 0.10 to 0.10 mm
– 0.0039 to 0.0039 in.
0.3 mm
0.0118 in.
Valve Stem to Valve Guide
Valve Stem
Valve Guide
Clearance
O.D.
I.D.
0.030 to 0.057 mm
0.00118 to 0.00224 in.
5.968 to 5.980 mm
0.23496 to 0.23543 in.
6.010 to 6.025 mm
0.23661 to 0.23720 in.
0.10 mm
0.0039 in.
–
–
Valve Timing (Intake Valve) Open
Close
0.35 rad. (20°)
before T.D.C.
0.79 rad. (45°)
after B.D.C.
–
–
Valve Timing (Exhaust Valve) Open
Close
0.89 rad. (50°)
before B.D.C.
0.26 rad. (15°)
after T.D.C.
–
–
KiSC issued 04, 2009 A

Kubota WSM Specifications

General

Brand	Kubota
Model	WSM
Category	Lawn Mower
Language	English