Tolerances And Wear Limits - Shindaiwa 300 Service Manual

Seetion
14 Appendix
Tolerances and Wear Limits
DirnenSlons : in ches (mm)
300 300S 357 360 377 488
Piston Diameter
use a mlcromeler lo measure
Standard 1.4 1 57- 1 .4 1 63 1.4 1 57- 1.4 163 1.5732-1.5788 1691 - 1.69
1.691-1 .692 1691 -1.692
(35 96-35-9 75) (35.96-35-9 75) (39.96-39975) (39 .96-39 .975) (3 .9 -39.975) (42.95-42 .965)
Limi! .413 (359) 1. 41 3 (35 9) 1.453 (36 .9) 1.57 1 (399 ) 1.57 1 (39.9) 1.688 (4288)
Piston Pin Bore Diameter (Pin Boss Diameter) use
a
hole gauge lo measure
Standa rd 0. 394 (10) -0 .0004 (01 )-Mod els 300 Ihrough 488
Li mit
Ring Groove Width
use a c aliper lo meas ure (remove carbon firsl)
Stan dard 0 .059 (1 .5) +0.001 -0 .002 (+ 03- .06) 0 .039 (1 .0)
+
.00 1-.002 (+ .03- .05)
.051
(1.3)
+001/002
(+03-06)
Piston/Cylinder Clearance us e a thickness ga uge lo measure
Standard 000236-0.0078 (025-.06)-lV1odels 300 hrough 377 00 138-.0019 7
(035-.050)
Ring/Ring Groove Clearance
Standard 0.0015 -0. 0035 (.04-09)-AII Models
Lim il 0 .0079 (20)-AII Mode ls
SHINDAIWA CYLlNDERS CAN NOT BE BORED (Replace if deviati on is found) .
Cylinder Inside Diameter
use a te lescop ing gauge a d mlcrometer to measure
Standard 1.417 (36) 1.417 (36) 1.457 (37) 1.575 (40) 1.575 (40 ) 1.693 (43)
Limit 1.421 (36 1) 1.421 (36. 1) 1.461 (37 .1) 157 (41 .1) 1. 579 (411) 1.697 (43 .1)
Cylinder Out of Round
use a telescop in g gauge an d micrometer to measure
Standard 0.0002 (005)-A II Models
Lim il
0.001 (.03)- AII Mod els
Cylinder Taper use a telescoping gauge and micrometer lo measure
Standard 00004 (01 )-AI I Models
Li mit 0.0020 (.05)- AII Mod els
Compressi on Standard 140 psi- 156- AII Models
Piston Ring Width use a c all per lo measure
Standa rd 0059(1.5) 0.059( 1.5) 0 .059 ( 15)
0.059 (1.5) 0.05 ( 1.5) 0.05 19 ( 1.3)
Lim it 0.054 ( 1 3) 0.054 (1 .3) 0054 ( 1 3) 0 .054 (1 .3) 0 .054 (1 .3)
0 .0468(1 .1 9)
Piston Ring Thickness use a mic rome ter lo measu re
Standard 0.059 (15 ) 0 .059 (1 5) 0.059 (1 .5) 0. 059 ( 1.5)
005
( 1 5) 0 .063 (1 .6)
Limit 0 .05 1 (13) 0.05 1 ( 1 3) 0.051 (13) 0.051 (13) 0051 (13) 0.055 1 (14)
Piston Ring End Gap use a Ihickness gauge to ea sure
Standard 0.1-0.3 mm 0.1-0 .3 mm 1.6- 1.8 mm 1.6-1.8 mm 1.6-1 .8rnm 0. 1-03 mm
Llmit 0.7 mm 0.7 mm 2. 2 mm
2 2mm 22 mm 0 .7 mm
Piston Pin Diameter use a mlc ro meter to measure
Standard 0 .3937 (1 O)-lV1o de!s 300 thro gh 488
Limil 0.3929 (998)- Mo dels 300 th rough 488
Inside Diameter of Small End of Conecting Rod
use a cal lper lo measure
Standard 0.55 12 ( 14 )- Mod els 300 th rou g h 488
Limi! 0 .5528 (14.04)- Models 300 lhr gh 488
Crankshaft Off-Center (runout) use a dial indlca tor to measure
Standard 0.0007 (002)-A II Model s
Limi t 0 .0027 (0.07 )-AII Models
Crankshaft End Play use a thi c kness gauge o measure
Standard 0.0089-. 0138 0.0089-.0 138 0.09- .3
nm
0008 -. 01 38 0 008 -. 0138 0.00 2 .0094
Limi t
o
1-0.35 mm
o
1-035 mm 0 .09 .3 mm
o
1-0 .35 mm 0.1-0 .35 mm
0 .03-.24 mm
132
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