| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-219-14-8
4-7.10A. ENGINE - MAINTENANCE INSTRUCTIONS (Continued).
ENGINE REASSEMBLY
NOTE
The following is sequence for reassembly
of a typical two cylinder engine. The
procedure does not, in most cases, cover
reassembly of the various sub-assemblies.
This has been covered elsewhere in this
paragraph. Make sure work area and all
parts are kept clean during final assem-
bly of the engine.
a. Crankshaft End Play Adjustment.
If bearings are replaced you must measure crankshaft and shim as required to assure correct end play
exists when crankshaft is installed in crankcase. Proper end play is to be established by the following
procedure:
(1)
With a suitable micrometer, measure distance B. (The distance across the outer surfaces of
each pair of crankshaft fly-weights as shown below.)
(2)
Refer to Shim Chart (distance B) for the appropriate shim to be placed between the bearings
and outer flyweights.
(3)
After installing the first two bearings, and shims B, distance A is to be computed by measuring
the total distance between the outer-most race surfaces of the two bearings already installed, and adding to that
measurement, the thickness dimension of the bearing yet to be installed. The arrived-at sum of these
dimensions will constitute distance A.
(4)
Refer to Shim Chart (distance A) and select the appropriate shim(s) required between the two
left hand main bearings.
4-397
|
||
|
||
