Kubota K008-3 Workshop Manual page 352

(3)Inspection
1.Piston rod warp
Mount the piston rod on a V-block.
Set a dial indicator at the center of the rod.
Rotate the piston rod and read the indicator. Warp
is one-half of the difference between the maxi-
mum and the minimum readings.
If the valve exceeds the allowable limit, replace
the piston rod.
• Reference value .. warp within 0.05 mm, 0.002in.
• Allowable value ... warp within 0.5 mm, 0.0197in.
2.Clearance between piston rod and bushing
Measure the piston rod O.D. and cylinder head
bushing I.D. and determin the clearance.
25 to 40 mm
Reference
value
45 to 75 mm
25 to 40 mm
Allowable
limit
45 to 75 mm
0.9843 to 1.5748 in
Reference
value
1.7717 to 2.9528 in
0.9843 to 1.5748 in
Allowable
limit
1.7717 to 2.9528 in
3.Clearance between cylinder tube I.D. and Pis-
ton ring O.D.
Measure the cylinder tube I.D.
Calculate the piston ring thickness plus piston ring
groove O.D. determin the clearance.
less than 60 mm
Reference
65 to 115 mm
value
more than 120 mm
less than 60 mm
Allowable
65 to 115 mm
limit
more than 120 mm
2.3622 in less
Reference
2.5590 to 4.5276 in
value
4.7244 in more
0.9843 to 1.5748 in
Allowable
1.7717 to 2.9528 in
limit
4.7244 in more
IV-S-96
Rod size Clearance
less than 0.25 mm
less than 0.30 mm
0.4 mm
0.5 mm
less than 0.010 in
less than 0.012 in
0.0158 in
0.0197 in
Rod size Clearance
0.05 to 0.30 mm
0.05 to 0.35 mm
0.05 to 0.40 mm
0.60 mm
0.70 mm
0.80 mm
0.0020 to 0.0118 in
0.0020 to 0.0138 in
0.0020 to 0.0157 in
0.0236 in
0.0276 in
0.0315 in
Courtesy of Machine.Market