Kubota MX5100, Workshop Manual

Page: 97 / 454

1-S5
MX5100, WSM ENGINE
2. SERVICING SPECIFICATIONS
ENGINE BODY
W1116131
Item Factory Specification Allowable Limit
Valve Clearance (When Cold) 0.18 to 0.22 mm
0.0071 to 0.0086 in.
–
Compression Pressure
(When Cranking with Starting Motor) 3.24 to 3.72 MPa /
290 min
-1
(rpm)
33.0 to 38.0 kgf/cm
2
/
290 min
-1
(rpm)
470 to 540 psi /
290 min
-1
(rpm)
2.55 MPa /
290 min
-1
(rpm)
26.0 kgf/cm
2
/
290 min
-1
(rpm)
370 psi /
290 min
-1
(rpm)
Top Clearance 0.575 to 0.675 mm
0.0227 to 0.0265 in.
–
Cylinder Head Surface Flatness – 0.05 mm / 500 mm
0.002 in. /
19.7 in.
Valve Recessing
(Protrusion to Recessing) Protrusion
Recessing
0.05 mm
0.002 in.
0.15 mm
0.0059 in.
–
0.40 mm
0.016 in.
Valve Stem to Valve Guide
Valve Stem
Valve Guide
Clearance
O.D.
I.D.
0.040 to 0.070 mm
0.0016 to 0.0027 in.
7.960 to 7.975 mm
0.3134 to 0.3139 in.
8.015 to 8.030 mm
0.3156 to 0.3161 in.
0.10 mm
0.0039 in.
–
–
Valve Face Angle (Intake)
Angle (Exhaust)
1.0 rad
60 °
0.79 rad
45 °
–
–
Valve Seat Width (Intake)
Width (Exhaust)
2.12 mm
0.0835 in.
2.12 mm
0.0835 in.
–
–
Valve Seat Angle (Intake)
Angle (Exhaust)
1.0 rad
60 °
0.79 rad
45 °
–
–
Valve Timing (Intake Valve) Open
Close
0.35 rad (20 °)
before T.D.C.
0.79 rad (45 °)
after B.D.C.
–
–