Checks And Corrections; Service Data - Robin DY23-2D Service Manual

9. CHECKS AND CORRECTIONS
After disassembling and cleaning the engine, check and repair, if necessary, according to
the correction table. The correction table applies whenever the engines are repaired.
It is important for the servicemen to be familiar with the contents of this table.
Correct maintenance is recornrnendk by observing the correction standards specified.
The meanings of the terms used in the correction table are as follows
:
( 1
1
CORRECTION
Repair, adjustment or replacement of any engine parts.
( 2
1
CORRECTION LIMIT
The limit on wear, damage or functional deterioration of engine parts beyond which
normal engine performance cannot be expected without repairing such parts.
( 3 ) USE LIMIT
The limit
beyond which parts can no longer be used in respect of performance or
strength.
( 4 ) STANDARD DIMENSIONS
The design dimensions of new parts minus tolerance.
(5) CORRECTION TOLERANCE
Tolerance on the dimensions of engine parts refinished or adjusted.
9 - 1 SERVICE DATA
Engine
DY23
STD
Limit
ITEM
CYLINDER HEAD
@ Flatness
I /
0 . 0 5
( 0 . 0 0 2 )
@Valve seat contact width
( @ )
e V a l v e guide inside dia.
I I
I
Unit
:
mm (in)
DY27
0.05
(0.002)
1.6
2.2
( 0 . 0 6 3 )
(0.087)
1.6
2.2
( 0 . 0 6 3 )
(0.087)
5 . 5 - 5 . 5 1 8 5 . 6 5
( 0 . 2 1 6 5 - 0 . 2 1 7 2 ) ( 0 . 2 2 2 4 )
-
58
-