TM 5-3810-206-35
Section IV. ENGINE GOVERNOR
(2) Remove two screws (37) and lockwashers
3-8.
General
(36), from body (40).
Engine model 687C-18-ES is controlled by an overspeed
(3) Remove governor base (4) from body (40).
governor (para 3-9) and a fly weight governor integral
(4) Remove washer (7), gasket (6), and sleeve
with fuel injection pump (para 3-17). The governor used
bearing (5) from base (4).
to control engine model D333TA is described in
(5) Remove spider and shaft (11) from body
(40).
(6) Remove clips (8) and weight pins (9) from
the two governor control weights (10), and remove
3-9.
Overspeed Governor for Engine Model 687C-
weights from spider and shaft (11).
18-ES
(7) Remove retaining ring (45), sleeve bearing
a. General. The overspeed governor is driven by
(13), and thrust bearing sleeve (12) from spider and
the tachometer drive, and is located at front end of the
shaft (11).
camshaft. This governor actuates the shutdown lever of
(8) Remove spring (21) from bolt (20) and lever
the fuel injection pump through a microswitch controlled
(16).
circuit. See the wiring diagram in TM 5-3810-206-12.
(9) Remove two adjusting screw locknuts (22)
b. Removal and Installation. Remove or install the
and bolt (20) from rocker arm shaft (23).
overspeed governor on engine model 687C-18-ES (TM
(10) Remove nut (24) and screw (25) from rocker
5-3810-206-12).
arm shaft (23).
c. Disassembly.
(11) Remove ring (35) from rocker arm shaft
(1) Remove weight stop ring (1, fig. 3-6),
(23).
flatwasher (2), and outer oil seal (3) from governor base
(4).
KEY to fig. 3-6:
1
Weight stop ring
17
Washer
32
Washer (2 rqr)
2
Flatwasher
18
Nut
33
Screw (2 rqr)
3
Seal (2 rqr)
19
Pin
34
Bracket
4
Base
20
Bolt
35
Ring
5
Sleeve bearing
21
Spring
36
Lockwasher (2 rqr)
6
Gasket
22
Nut (2 rqr)
37
Screw (2 rqr)
7
Washer (2 rqr)
23
Rocker arm shaft
38
Connector nut
8
Clips (4 rqr)
24
Nut
39
Bushing
9
Weight pin (2 rqr)
25
Screw
40
Body
10
Governor control eight (2 rqr)
26
Flatwasher
41
Bracket
11
Spider and shaft
27
Packing
42
Nut (2 rqr)
12
Thrust bearing sleeve
28
Sleeve bearing
43
Sleeve bearing
13
Sleeve bearing
29
Capscrew (2 rqr)
44
Connector
14
Screw (2 rqr)
30
Screw (2 rqr)
45
Retaining ring
15
Governor thrust yoke
31
Sensitive switch
46
Key
16
Lever
Figure 3-6. Overspeed governor, exploded view.
3-10
