Banks Power Cummins Motorhomes: (Diesel ’93 - 98 B5.9L & C8.3L) Power Systems- Stinger system 8.3L, 250-325-hp rated Class-A Pusher MH - Manual (Page 3)

The Cummins C8.3L engine uses a divided exhaust
manifold and turbocharger. The pyrometer probe must be
installed to sample exhaust temperature in one of the two
exhaust passages. Typically the exhaust temperature will
not differ appreciably between the two passages. We
recommend installing the probe in the rear manifold
passage to simplify routing the probe wiring.
Stuff a small shop towel or rag 4 to 5 inches into
the rear exhaust manifold passage through the
turbocharger mounting flange. This is to prevent chips from
entering the manifold while drilling and tapping.
Drill through the exhaust manifold into the rear passage
at the location shown in
Figure 1 . Use a 7 ⁄
16
inch drill,
keeping the drill perpendicular to the manifold surface.
Tap the drilled hole with a 1 ⁄
4
NPT pipe tap. Check
the thread depth as you tap by periodically
removing the tap and screwing the probe fitting (supplied
in pyrometer kit) into the tapped hole. The probe should
thread in 3 to 3
1 ⁄
2
turns hand tight. Do not install the probe
in place at this time.
Remove as many loose chips as possible from the
exhaust manifold. A shop vacuum, small brush, or
fingers will help. Now remove the rag using a welding rod
or coat hanger bent into a hook.
CAUTION! Make sure rags are removed from exhaust
manifold prior to reinstalling turbine housing!
Install the probe in the manifold. Anti-seize on the
threads is recommended.
TURBOCHARGER DISASSEMBLY AND REASSEMBLY:
Clamp the turbine inlet flange of the turbocharger in
a bench vise. Loosen the six bolts, attaching the
turbine housing to the center bearing section of the
turbocharger. (
See Figure 2 )
Remove the bolts, lockplates, and clamp plates.
Carefully remove the center bearing and compressor
assembly from the cast iron turbine housing. If the
turbocharger has been in service for some time, rust and
carbon may prevent the center bearing and compressor
assembly from easily separating from the turbine housing. If
light hammer blows, penetrating oil or heat will not free the
compressor assembly from the turbine housing, the clamp
bolt adjacent to the turbo oil inlet connection may be backed
out so as to push against the bearing casting and separate
the two components. Remove any loose rust or carbon from
the bearing housing that might prevent proper engagement
into the new turbine housing.
14.
13.
12.
11.
10.
9.
8.
P.N. 96381 3
Figure 2
Figure 1