Chevrolet 70 Series 1970, Service Manual

Page: 438 / 841

53 AND 71 SERIES DIESEL ENGINES 6C-41
Figure 35—Removing or Installing Oil Connector
under "Engine Tune-Up O perations" e a r lie r in this
sectio n .
NOTE: The valve bridge adjusting sc r e w lock
nut m ust not be lo o sen ed or tightened with bridge
in p la c e. Hold the bridge with v is e to avoid bending
bridge guide or valve stem .
2. If wiring term in al bracket w as rem oved,
lo ca te bracket a ssem b ly at fu el tube r is e r s and
tighten clam p bolt with end wrench. In stall feed
w ire and insulator in threaded hole in cylinder
head flange, then connect feed w ire at term in al on
bracket (fig. 37).
3. If n e c e ssa r y to in sta ll fuel tubes, the stand­
ard tubes cannot be u sed with engine brake m ech­
an ism . The lon ger, curved tubes (fig. 5) m ust be
used to provide sp a ce for the engine brake hous­
in g s. When in stallin g fuel tubes tighten tube nuts
with torque w rench and adapter to 12 to 15 foot­
pounds.
4. Lay out the engine brake housing a s s e m ­
b lie s and attaching p a r ts in p osition s shown in
figu re 31 for 6-71 In -lin e engine or figure 32 for
8V -71 engine.
5. In stall o il connector sc r e w and lock nut
Figure 36—Installing Oil Connector in Housing
IPrior to Housing Installation)
( f ig .36) in drone housing a ssem b ly . S c r e w m ust
be in stalled far enough to avoid in terferen ce with
supply housing se a l when assem b lin g p arts on en­
gine.
NOTE: Unused threaded opening in drone hous­
in gs must be clo sed with sp ecia l self-lo c k in g
threaded plug.
6
. P la ce o il connector s e a l ring in counter­
b ore o il hole in o il supply housing(s) (fig. 38).
7. P la ce hold-down b olts through the engine
brake housings, then se t the housings in p la ce over
rock er arm sh a fts. The m aster piston fork and
guide a sse m b lie s m ust fit over the in jector push
rod c le v is e s .
8
. Tighten the hold-down bolts altern ately in
gradual sta g es to se a t p arts solid ly at cylinder
head, then tighten b o lts (fig. 39) to 90 foot-pounds
with torque wrench.
9. O bserve o il connector s e a l ring (fig. 38)
and if n e c e ssa r y u se narrow screw d r iv er to sea t
the se a l squarely in counterbore in housing and
■ f l l
WIRE ENDS
DISCONNECTED TO AVOID
DAMAGE FROM TWISTING
LOOSENING OR TIGHTENING TERMINAL BRACKET CLAMP REMOVING OR INSTALLING THREADED WIRE INSULATOR
Figure 37—Engine Brake Unit Wiring Replacement
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL