Instructions / Assembly

VI. CRITERIA FOR RECONDITIONING
Critera for reconditioning of EH025-type engine
Part to be repaired
Gauge
Adjustment
accuracy
Adjustment
limit
Usage limit
Remarks
Tool
If not
adjustable
Bore diameter φ34 +0.02
0
0.06 0.06 Cylinder
gauge
Inside diameter
of valve guide
φ3 +0.025
+0.005
0.10 0.10 Diameter of
central part
Inside
micrometer
Replacement
External diameter
of skirt in thrust
direction(4.5-8.2mm
higher from bottom)
φ33.98
0
～0.021
-0.04 -0.04 Micrometer
Replacement
Width of ring
grooves
Top
2nd
Oil
1.0
1.0
2.0
+0.04
+0.02
+0.03
+0.01
+0.03
+0.01
+0.06 +0.06 Slide
calipas
Replacement
PIN hole φ8 +0.005
-0.004
+0.03 +0.03 Replacement
Gap between
PISTON and
CYLINDER
0.02L
～0.061
0.1 0.1 At skirt
bottom
in piston
thrust
direction
Cylinder
gauge,
micrometer
Replacement
Gap between ring
grooves and rings
Top
2nd
Oil
0.03
～0.07
0.02
～0.06
0.04
～0.14
0.12
0.12
0.20
0.12
0.12
0.20
Gap gauge Replacement
Authorized tally of
PISTON and PISTON PIN
0.004T
～0.011L
0.04 0.04 Micrometer
R e p l a c e w h e n t h e w h o l e
r i n g w o r k i n g f a c e t o u c h e s
t h e C Y L I N D E R .
Closed gap
Top
2nd
Oil
0.10
～0.25
0.10
～0.25
0.10
～0.60
0.8
0.8
0.8
0.8
0.8
0.8
Gap gauge Replacement
Width
Top
2nd
Oil
1.0
1.0
2.0
-0.01
-0.03
-0.01
-0.03
-0.03
-0.11
-0.05
-0.05
-0.14
-0.05
-0.05
-0.14
Micrometer Replacement
External diameter
of PISTON
φ8 0
-0.006
-0.012 -0.012
34
CYLINDER BLOCK
PISTONPISTON RING