|
| |
TM 5-4210-220-34
3-8.
ENGINE - Continued
(14) With bearing in place, tighten rear end plate 5/8 in. bolts to 110 ft lb (149 Nm) and 3/8 in. bolts to 35 ft lb (47
Nm).
(15) Remove camshaft bearing.
(16) Trim off any excess gasket material in oil pan gasket mounting area.
(17) If required, rebuild engine.
REPAIR
a.
Cylinder Block Rebore
NOTE
Use J29005 shop line boring tool, or for machine shop rebore, refer to b. following.
Block removed from truck and stripped as detailed in REMOVAL preceding.
(1) In order to rework cylinder block with damaged saddles caused by a spun main bearing using line borer
J29005, t here must be two undamaged main bearings saddles, one of which must be the rear main saddle.
(2) If rear main saddle is damaged, block must be machine shop line bored; see b. following.
(3) Remove all main bearing caps. Clean rework area.
(4) The two undamaged saddles act as an alinement saddle for centering rings of line borer J29005.
(5) In a block that has front and rear saddles that can be used as the alinement saddles, boring tool will only
have to be installed and set once to enable repair work to be done to either number 2, 3, or both main
bearing saddles.
(6) Where the two alinement saddles are next to each other, the closest to the rear saddle is repaired first.
(7) Set centering rings into the alinement saddles. Install main bearing caps and capscrews, but do not tighten.
Lubricate centering ring holes with oil (item 17, Appendix B). Slide boring bar through centering rings. Bar
must rotate freely.
(8) Tighten main bearing capscrews to 230 ft lb (312 Nm). Centering rings should be held stationary and bar free
to rotate.
(9) Install main bearing capscrews fingertight into all remaining saddles to prevent chips from entering bolt holes.
(10) Fasten torsion bar and hydraulic feed unit on either end of cylinder block. Index the flat on the feed rod into
boring bar. Snug set screw.
(11) Zero the micrometer with the test block. Micrometer is 0.005 in. (0.13 mm) per revolution.
3-191
|
