(a) Refer to figure 3-78 and remove fan.
(b) Install in reverse order.
(2) Cleaning, Inspection and Repair.
(a) Clean all parts in an approved
cleaning solvent and dry thoroughly.
(b) Visually inspect fan blades for bends,
cracks, or other damage. Inspect mounting hardware for
burs or stripped threads.
(c) Repair by straightening bends,
welding cracks, or replacing defective hardware.
c. Fan Idler Pulley (Engine Model D333TA).
(1) Removal and installation. Refer to view A
of figure 3-79 and remove fan idler pulley. Install in
reverse order.
(2) Disassembly and reassembly. Refer to
view D of figure 3-79 and reassemble fan hub.
Reassemble in reverse order.
(3) Cleaning, inspection, and repair.
(a) Clean all parts in an approved
cleaning solvent and dry thoroughly.
(b) Visually inspect all parts for damage
or defect. Inspect seal for deterioration, bearings for wear
or scoring, and mounting hardware for burs or stripped
threads.
(c) Repair by replacing damaged,
defective, or worn parts.
3-97. Fan Belt
a. Removal and Installation
(1) From engine model 687-18-ES. Refer to
from pulleys. Install in reverse order.
(2) From engine model D333TA. Refer to view
A of figure 3-79, loosen adjustment screw, then remove
belts from pulleys. Install in reverse order.
Figure 3-75. Fan guard (engine model D33TA)
Note
removal and installation.
When twin belts are used, replace
belts in matched pairs when one is
(1) Removal and installation
defective
(a) Remove fan belt (para 3-97).
(b) Refer to figure 3-77 and remove fan and
b. Cleaning and Installation.
support bracket
(1) Clean belts with a rag dampened in an
(c) Install in reverse order.
approved cleaning solution and dry thoroughly.
(2) Cleaning, inspection and repair.
(2) Visually inspect belt for fraying, tearing, or
(a) Clean all parts in an approved cleaning
other deterioration. Replace defective belt(s). See note
solvent and dry thoroughly.
in a(2) above 398. Thermostat Housing, Thermostat, and
(b) Visually inspect all parts for cracks, breaks,
Coolant Lines
damaged threads, or other defect.
a. On Engine Model 687C-18-ES.
(c) Repair by replacing defective parts or
mounting hardware.
b. Fan (Engine Model DE33TA).
(1) Removal and Installation
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