11
Lifting
13
Nut
12
Lockwasher (9 rqr)
14
Lockwasher (6 rqr)
13
Capscrew (9 rqr)
15
Capscrew (6 rqr)
4
Lockwasher (2 rqr)
16
Fan blade
5
Capscrew- (2 rqr)
17
Spring
6
Flatwasher (4 rqr)
18
Adjustment support bracket
7
Ring (2 rqr)
19
shaft
8
Bearing (S rqr)
20
Setscrew
9
Pulley
21
Nut
10
Spacer
22
Fan Support
11
Pilot
23
Gasket
12
Washer
Figure 3-31. Fan assembly, for engine model 687C-18-ES exploded view.
(2) Inspect all threaded surfaces for burs or
combustion chambers,
which are
damage. Inspect shaft for wear or straightness. Inspect
made
of
Ethylene
Propylene
pulley grooves, bearings, spacer, and rings for wear or
Terpolymor (EPT).
damage. Inspect machined surfaces for scratches or
other damage. Inspect fan blades for damage, and
c. Cleaning, Inspection, Repair and Test. Refer to
mounting hardware for burs or stripped threads.
caution above, then clean, inspect, repair, and test
(3) Repair by replacing defective components
radiator in manner described in paragraph 3-22 above.
or mounting hardware.
3-24. Fan for Engine Model 687C-18-ES
3-25. Water Pump for Engine 687C-18-ES
a. Removal and Installation Remove or install the
a. Removal and Installation
fan (TM 5-3810-201-12).
(1) Drain coolant system and remove coolant
b. Disassembly and Reassembly.
hose from water pump (TM 5-3810-201-12).
(2) Remove four bolts (1, fig.
(1) Remove the fan blade and fan support
lockwashers (2), and cover (8) from body (11).
from mounting bracket (TM 5-3810-201-12).
(3) Remove packing (4) from cover (8).
(2) Remove nut (18, fig. 3-31), washer (12),
(4) Remove nut (5) and washer (6) from
and pilot (11).
blower shaft (14).
(3) Remove pulley (9) and support bracket
(5) Remove impeller (17) from shaft (14). Use
(18) from shaft (19).
special puller (table 2-1).
(4) Remove two rings (7), two bearings (8),
(6) Remove key (7) from shaft (14).
and spacer (10) from pulley (9).
(7) Remove wire (8), four capscrews (9),
(5) Reassemble by reversing the procedures
washers (10), and pump body (11) from blower.
in steps (1) through (4) above. Install new gasket (23)
(8) Press seal (15) from body (11), and
when fan is installed.
remove drain cock (16) and plug (12) from body (11).
c. Cleaning, Inspections, and Repair.
(1) Clean all parts and dry thoroughly before
inspection and reassembly. Discard all used gaskets
AGO 20051A
3-40
