TM 5-3810-295-34
(59) from throttle shaft (71).
free cloth. Do not wet with the cleaning solvent.
(16) Remove lock seal (60) and wire (61). Compress
13-24. Inspection and Repair
retaining ring (62) and remove. Pull throttle assembly
a. Oil seals removed from the pump body must be
from pump.
replaced. Replace all gaskets and packing.
NOTE
b Check all parts for wear or excessive scoring,
The throttle shaft is a select fit in its sleeve
replace any defective parts.
and sizes are identified by color code. Shaft
c Inspect filter screen for holes or imbedded metal
must be handled with care.
particles in mesh. Replace screen if damaged.
(17) Remove throttle cover (63), spacers (64) and
d. Check pump gear teeth for scoring, chipping,
preformed packing (65). Discard packing. Remove
cracks or wear; discard if damaged. Check pump gear
setscrew (66) and lockwasher (67) from shaft (71).
shaft bearing surface for wear or scoring. Replace
Remove plunger (68) and shims (69). Pull pin (70) from
shaft if bearing surface is worn smaller than 0.4998-
throttle shaft (71).
inch diameter.
(18) Remove lock seal and wire (72) from screw
e Check gear width. Width must be 0.7483--0.7486
(73). Remove screw (73), washer (74) and lockwasher
inch. Gear pocket depth in pump body and cover shall
(75). Lift off cover (76) from main housing. Remove
be 0.7478--0.7483 inch. Replace gears if these
gasket (77) and discard.
measurements are not met.
(19) Using snap ring pliers remove retaining ring
f Check shaft bore in pump body and cover. Bore
(79). Remove retainer (80), shims (81) and spring (82).
shall have an ID of 0.5013---0.5016 inch.
Pull guide and clip assembly (83), Remove phl!nger (84),
g Inspect shut-down valve and valve seat for wear,
spring (85) and washer (86) from the guide and clip as-
bonding failure or corrosion. Replace if damaged.
sembly. Remove adjusting screw (87).
Valve seat shall have a minimum seat 0.015 inch wide.
(20) Remove screws (88) and lift tachometer hous-
CAUTION
ing (89) from main housing. Remove gasket (90) and
Starting switch must be in the OFF position
discard.
when checking coil.
(21) Drive tachometer assembly from the main
k Using an Ohmmeter check coil assembly resist-
housing, using a brass punch and hammer.
ance, replace if resistance is not 28.0-30.0 Ohms.
(22) Remove felt washer (91) and seal (92) from
i Check governor weight shaft bushing in the front
shaft (96) and discard. Remove gear (93), bushing (94)
cover assembly. If bushing ID is larger than 0.054
and spacer (95) from shaft (96). Disassemble angle
inch, replace.
joint (97) and housing (89).
i. The mating surfaces of the pump body and cover
(23) Screw off filter cap (98) and remove seal (99),
must fit tightly together. Check for scratches or slight
spring (100) and screen assembly (101) from the main
damage which may result in pressure leaks. Check for
housing.
wear at areas contacted by gears and shafts. Replace
(24) Remove adjusting nuts (102) and adjusting
the cover and/or body if necessary.
screws (103) from main housing.
k. Check governor barrel and plunger for wear. If
(25) Remove screws (104) and nameplate (105).
worn, replace governor plunger with a new plunger of
Remove plug (106) and preformed packing (107). Dis-
same class size as etched on face of governor barrel.
card preformed packing. Remove plug (108) from main
NOTE
housing (116).
Due to hardness of governor barrd sleeve, it
(26) Remove driver (109) and washer (110) from
wears very little. If worn excessively, or if
plunger (113). Remove pin (111), spacer (112) plunger
plunger shows signs of scoring, barrel must be
(113), shims (114) and spring (115) from housing (118).
replaced.
(27) Remove pin (117) and housing (118) from
13-25. Reassembly and Installation
governor barrel (119) if required.
a. Refer to figure 13-6 and reassemble the shutdown
(28) Heat main housing (116) if it is necessary to
valve as follows:
remove barrel (119). See paragraph 13-24i.
(1) Install plug (15) into housing (14). Install new
(29) Remove dowel (120), ring dowel (121) and
packing (13) on new shaft (12) and coat with lubricant.
bushing (122) from housing (116) if required.
(2) Screw shaft (12) into housing (14) until it is
13-23. Cleaning
0.118 inch below housing face. Without moving shaft,
a Clean all metal parts with cleaning solvent,
press on knob (11) until it contacts housing (14) which
Federal Specification P-D-680, or equivalent. Dry com-
will act as a stop.
pletely with compressed air.
(3) Place valve (10) into housing (14) with the rub-
& Clean filter screen and retainer by soaking in fuel
ber side toward the housing.
oil and dry with compressed air.
(4) Place spring washer (9) on valve with the con-
c Wipe coil assembly (6, fig. 13-6) with a clean lint-
13-13
