Kubota M5040, Workshop Manual

Page: 130 / 559

1-S4
M5040, M6040, M7040, WSM ENGINE
2. SERVICING SPECIFICATIONS
ENGINE BODY
W1013874
Item Factory Specification Allowable Limit
Compression Pressure 3.92 MPa /
250 min
−
1
(rpm)
40.0 kgf/cm
2
/
250 min
−
1
(rpm)
569 psi /
250 min
−
1
(rpm)
2.90 MPa /
250 min
−
1
(rpm)
29.6 kgf/cm
2
/
250 min
−
1
(rpm)
421 psi /
250 min
−
1
(rpm)
Variance Among Cylinders – 10 % or less
Valve Clearance (Cold) 0.13 to 0.17 mm
0.0051 to 0.0067 in.
–
Top Clearance 0.60 to 0.80 mm
0.0236 to 0.0315 in.
–
Cylinder Head Surface Flatness – 0.05 mm
0.0020 in.
Valve Recessing (Intake and Exhaust) 0.65 to 0.85 mm
0.0256 to 0.0335 in.
1.2 mm
0.0472 in.
Valve Stem to Valve Guide (Intake and
Exhaust)
Valve Stem
Valve Guide
Clearance
O.D.
I.D.
0.055 to 0.085 mm
0.0022 to 0.0033 in.
6.960 to 6.975 mm
0.2740 to 0.2746 in.
7.030 to 7.045 mm
0.2768 to 0.2774 in.
0.1 mm
0.0039 in.
–
–
Valve Face (Intake and Exhaust) Angle 0.785 rad
(45 °)
–
Valve Seat (Intake and Exhaust) Angle
Width
0.785 rad
(45 °)
3.3 to 3.6 mm
0.1299 to 0.1417 in.
–
–
Intake Valve Timing Open
Close
0.24 rad (14
°
)
before T.D.C.
0.70 rad (40
°
)
after B.D.C.
–
–
Exhaust Valve Timing Open
Close
0.87 rad (50
°
)
before B.D.C.
0.24 rad (14
°
)
after T.D.C.
–
–
Valve Spring (Intake and Exhaust) Tilt
Free Length
–
35.1 to 35.6 mm
1.3819 to 1.4016 in.
1.0 mm
0.039 in.
34.6 mm
1.3622 in.
KiSC issued 06, 2008 A