TM 5-3810-289-34
Note. If shaft bore is scored 1/3 of circumference
the idle and maximum or high-speed springs, plungers,
or more in cover or housing, scrap part. If scored less
adjusting screw and shims. The springs control engine
than 1/3 clean up and reuse pat.
speed and adjustments are made by the shims or
e. Reassembly.
adjusting screw.
(1) Lubricate and slide shafts and gears into
b. Removal Refer to paragraph 3-2.
cover. Make sure parts are clean.
c. Disassembly of Automotive Governor.
(2) Position new gasket (8) and install
(1) Remove capscrews (16 and 17, fig. 3-
housing to cover. Aline locating notches together (fig. 3-
governor spring pack cover (1) to main housing.
Note.
Location of notches determine pump
(2) Lift off cover (fig. 3-15) and discard
rotation.
gasket (18, fig. 3-63).
(3) Secure cover to housing with dowels,
(3) Remove snap ring (12) which holds
cap screws and lockwashers. Tighten capscrews to
governor spring pack in sleeve, with a pair of snap ring
13/17 foot pounds (fig. '3-62). Check to see that pump
pliers.
turns freely with finger pressure.
(4) Remove governor spring (3), spring
Note. Total gear backlash must b 0.001/0.004
retainer (11) and shims (2) from spring pack cover (1).
inch. The drive shaft must protrude 2 370/2 412 inch
(5) Remove idle spring plunger guide (7),
from the housing End clear mace should not exceed
idle spring (9, or springs, idle spring plunger (5, , and
0.0015 inch nor be less than 0.0009 inch.
spring rest washer. (fig. 3-16).
d. Disassembly of Mechanical Variable Speed
Caution: If pump binds or has excessive play,
Governor PT(type G) (f)fig. 3-64).
check for error in assembly which must be corrected
(1) Remove filter screen assembly (fig. 3-
to prevent early pump failure.
and lower filter screen, O-ring, and O-ring retainer (fig. 3-
(2)
Remove capscrews and washers
securing MVS governor to main housing.
Lift off
governor and discard O-ring packing.
Figure 3-61. Locating notches.
1
Spring pack cover
2
Governor spring shim
3
Governor spring
4
Idle spring plunger adapter
5
Idle spring plunger
6
Idle adjusting screw clip
7
Plunger guide
8
Screw, idle adjusting
9
Idle spring
10
Washer, adjusting screw
11
Spring retainer
12
Snap ring
13
Pipe plug
14
Seal (2)
15
Seal wire (2)
16
Capscrew, spring pack cover
17
Capscrew, spring pack cover (3)
18
Spring pack cover gasket
19
Lockwasher, spring pack cover (4)
20
Washer, plain, spring pack cover (4)
Figure 3-62. Gear pump capscrews torque.
Figure 3-63. Automotive governor - exploded view.
3-9. Governor Spring Pack
a. General. The governor spring pack consists of
3-22
