and disconnect and remove harness. Install new harness,
lead and installed on new lead in a similar manner.
making sure that all leads are correctly positioned and
securely fastened to terminals.
(2) Individual leads within a harness may be
Caution
replaced by cutting a length of wire lead as long. as the
Never remove, or install, leads to alternator while
defective lead, taping it to outside of harness at frequent
battery cables are installed.
Disconnect and tie
intervals, installing end terminals and connecting to
battery cables back to pre vent flash current
proper terminals. Be sure that protruding ends of old lead
are cut off as close to harness as practical, and that
Rectifying diodes in alternator, or transistors in
markers are removed from old lead and installed on both
voltage regulator are easily damaged by flash current.
ends of the substitute lead.
(3) When there are two or more defective
leads within a harness, the harness should be replaced.
Tag terminals, identifying lead color or marker number,
Section XIII. EXHAUST SYSTEM
Refer to figure 3-72, unscrew coupling and muffler to
3-90. General
remove. Install in reverse order.
a. Engine Model 687C-18-ES. This exhaust system
3-93 Exhaust Manifold (Engine Model 687C-18-ES)
provides a positive method of expelling exhaust gases
from cylinders to atmosphere through twin mufflers and
a. Removal and Installation
pipes.
Each muffler handles the exhaust of three
cylinders.
(1) Remove exhaust pipe and cap (para 3-19).
b. Engine Model D333TA. This exhaust system
(2) Remove muffler (para 3-92).
uses gases to power the turbocharger. The exhaust
(3) Refer to figure 3-71, remove four nuts,
manifold directs gases to turbocharger, and thence to
capscrews, flange and gaskets.
atmosphere through an unruffled exhaust pipe.
(4) Remove four nuts and clamp, four nuts and
washers, then remove two exhaust manifolds and
3-91. Exhaust Pipe and Cap
gaskets.
(5) Install in reverse order.
b. Cleaning, Inspection, and Repair.
and remove cap, and unscrew exhaust pipe from
(1) Clean all parts in an approved cleaning
coupling. Install in reverse order.
solution and dry thoroughly.
(2) Visually inspect manifold for cracks, breaks,
perform steps 1 and 2 and remove cap, hood, and
or other defect. Inspect gaskets for damage or defect.
exhaust pipe. Perform step 3 and remove elbow and
Inspect mounting hardware for bur, stripped threads or
plugs. Install in reverse order.
other defect.
(3) Repair by welding cracks or breaks, and
3-92. Muffler (Engine Model 687C-18-ES only)
replacing defective mounting hardware. Replace an
excessively damaged manifold.
3-80
