which can be tolerated in used engine
Specifications
parts and still ensure satisfactory per-
It should be emphasized that
formance.
Specifications, clearances and wear limits
the figures given as "Limits" must be
It should be specif-
are listed below.
qualified by the judgement of personnel
ically noted that the clearances apply on-
responsible for installing new parts.
ly when all new parts are used at the
These wear limits are, in general, listed
point where the various specifications
only for parts more frequently replaced
This also applies to references
apply.
For addition
in e n g i n e o v e r h a u l w o r k .
w i t h t h e t e x t o f t h e m a n u a l . The column
information, refer to the text.
entitled "Limits" i n t h i s c h a r t l i s t s t h e
amount of wear or increase in clearance
TABLE OF SPECIFICATIONS, NEW CLEARANCES AND WEAR LIMITS
These limits also apply to oversize and undersize parts.
LIMITS
MINIMUM
MAXIMUM
ENGINE PARTS (Standard Size, New)
Blower
.0040 "
.0025 "
.0005 "
Backlash (timing gears) ..................
.0080 "
.0020 "
Oil seal or seal collar (below end plate surface) . . . . . .
Dowel pin (projection beyond inside face
.3800 "
of end plates) . . . . . . . . . . . . . . . . . . . . . . .
Turbocharger
.0100 "
.0030 "
End play -- rotating shaft . . . . . . . . . . . . . . . . .
.
.0070 "
.0030 "
Radial movement -- rotating shaft . . . . . . . . . . . . . . . . .
.
Turbine wheel shaft journal bearings:
.6272 "
.6268 "
Inside diameter . . . . . . . . . . . . . . . . .
.
.9787 "
.9782 "
Outside diameter. . . . . . . . . . . . . . . . .
.
.6254 "
.6250 "
.....
.
Journal diameter -- turbine wheel shaft
Bearing bore -- center housing:
.9842 "
.9832 "
.9827 "
Inside diameter . . . . . . . . . . . . . . . . .
.
Back plate seal bore:
.6895 "
.6885 "
.6875 "
Inside diameter . . . . . . . . . . . . . . . . .
.
Thrust collar:
.2970 "
.3000 "
.2990 "
Thickness . . . . . . . . . . . . . . . . .
.
.3778 "
.3758 "
.3754 "
Bore - inside diameter . . . . . . . . . . . . . . . . .
.
Thrust Spacer:
.6705 "
.6725 "
.6715 "
Outside diameter . . . . . . . . . . . . . . . . .
.
.0715 "
.0695 "
.0685 "
Ring groove width . . . . . . . . . . . . . . . . .
.
Thrust washer, inboard:
.0920 "
.0900 "
Thickness . . . . . . . . . . . . . . . . .
.
Compressor wheel bore:
.3134 "
.3124 "
.3121 "
..................
Inside diameter (TV61)
