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Page Title:
Fuel Supply Pump Assembly. |
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 TM 9-2910-226-34
3-61. Tappet Assembly.
Wear limits
(direct and
Sizes and fits
general support
Fig
Ref.
maintenance)
of new parts
Point of measurement
letter
No.
GUIDE ASSEMBLY GU9021A, PIN P/N 9039,
B-8
ROLLER ASSY. PL768A (CODES A, B, C, D.
E, F Pumps)
0.4732 to 3.4739
ID of roller bushing type bearing
a
0.4745
0.4723 to 0.4725
OD of tappet roller pin
b
0.4720
0.0007L to 0.0016L
Fit of pin in roller bearing
a-b
0.0018L
c
0.9839 to 0.9845
0.9837
ODof tappet roller
0.4730 to 0.4738
d
0.4729
ID of pin bore in guide
0.0005L to 0.0015L
b-d
0.0016L
Fit of pin in guide bore
GUIDE ASSEMBLY GU9011A, PIN P/N 9013,
ROLLER ASSY. PL903A (USED ON CODE G PUMP)
0.3749 to 0.3754
ID of roller bushing type bearing
0.3760
0.3742 to 0.3745
0.3739
a
OD of tappet roller pin
0.0004L to 0.0012L
0.0014L
a-b
Fit of pin in bushing
c
0.6689 to 0.6693
0.6688
OD of tappet roller
0.3750 to 0.3758
0.3760
d
ID of bore in guide
0.0005L to 0.0016L
0.0018L
b-d
Fit of pin in guide bore
3-62. Fuel Supply Pump Assembly.
Wear limits
(direct and
general support
Sizes and fits
Ref.
Fig.
maintenance )
of new parts
Point of measurement
letter
No.
l
a
0.4375 to 0.4380
ID of shaft bore in housing
B-5
l
b
0.3121 to 0.3124
OD of idler gear pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l
c
0.3125 to 0.3130
ID of idler gear. . . . . . . . . . . . . . . . . . . . . .
*
b-c
0.000lL to 0.0009L
F i t o f g e a r o n p i n. . . . . . . . . . . . . . . . . . .
l
d
0.4365 to 0.4370
OD of drive shaft . . . . . . . . . . . . . . . . . . . . . . . .
l
a-d
0.0006L to 0.0010L
Fit of shaft in housing . . . . . . . . . . . . . . . . . . . . ...
e
Check valve spring:
0.5420
Free Length. . . . . . . . . . .
61./3
63 to 70
Spring rate . . . . . . . . . . . . . . . . . . . . . . . .
13.6 lbs
14 to 18 lbs
Lb compression at 0.3120-inch length . . . . . . . . . . . .
Overflow valve spring in Pump Cover:
(1) Spring SP 9044, (CV9057A, 80 psi) (used
on LDS-465-2, code A Pump).
1.995
Free length, inches . . . . . . . . . . . . . . . . . . .
1.95
36.0
37.5
Spring rate, lbs/in. . . . . . . . . . . . . . . . .
3.9
3.8
Lbs. compression at 0.890-inch length . . . . . .
11.7
Lbs. compression at 0.680-inch length . . . . . . . . .
11.3
(2) Spring SP7961, (CV9052A, 60 psi) (used
on LDS-465-1, code F Pump)
1.000
Free length, inches. . . . . . . . . . . . . . .
30
Spring rate, lbs/in. . . . . . . . . . . . . . . . .
4.55
4.4
Lbs. compression at 0.840-inch length . . . . . . . . . . .
* See paragraph 3-59.
3-112
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