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Page Title:
Injection Pump Assembly-continued |
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 TM 9-2910-226-34
Wear limits
(direct and
Sizes and fits
Ref.
general support
Fig
Point of measurement
of new parts
letter
maintenance)
No
B-3
Spring SP7951-13, No. 7383463, FSN 2990-830-
3882 (used on LDT-465, code E Pumps).
1,5150 to 1.6090
1.4750
Free length, inches . . . . . . . . . . . . . . . . . . . . . . . . .
38.0
Spring rate, lbs/in . . . . . . . . . . . . . . . . . . . . . .
40
6.2 to 6.77
6.0
Lbs. compression at 1.4000-inch length . . . . .
0.2485
OD of bracket pivot pin . . . . . . . . . . . . . . . . . . . . . . . . . .
d
0.2490 to 0.2495
0.5015
ID of shaft spring plate . . . . . . . . . . . . . . . . . . . . . . . . . .
0.5000 to 0.5010
e
*
Length of operating shaft bearing hub . . . . . . . . .
f
1.1860 to 1.1900
0.4970
OD of operating shaft bearing hub . . . . . . . . . . . . . . . . . . .
0.4980 to 0.4990
g
0.0035L
Fit of plate on bearing hub... . . . . . . . . . . . . . . . . . . . . . .
e-g
0.0010L to 0.0030L
OD of operating shaft end. . . . . . . . . . . . . . . . . . . . . . . .
h
0.2480
0.2485 to 0.2495
j
0.2460
OD of fulcrum sleeve pins . . . . . . . . . . . . . . . . . . . . . .
0.2495 to 0.2505
*
ID of fulcrum lever pivot pin holes . . . . . . . . . . . . . . . . . .
k
0.2500 to 0.2510
Fit of fulcrum lever on pin . . . . . . . . . . . . . . . . . . . .
0.0025L
d-k
0.0005L to 0.0020L
Fit of fulcrum lever on operating shaft . . . . . . . . .
0.0030L
h-k
0.0005L to 0.0025L
l
0.3780
ID of sliding sleeve . . . . . . . . . . . . . . . . . . .
0.3746 to 0.3756
0.0070L
Fit of sleeve on camshaft . . . . . . . . . . . . . . . . . . . . . . .
a-l
0.0006L to 0.0021L
0.2550
Width of slots in sliding sleeve . . . . . . . . . . . . . . . . . . .
0.2510 to 0.2530
m
0.0050L
0.0005L to 0.0035L
Fit of sliding sleeve on sleeve pin . . . . . . . . . . . . . . . . .
j-m
*
OD of camshaft ball bearing, . . . . . . . . . . . . . . . . . . . . . . . .
B-4
2.0467 to 2.0472
0.9840
a
0.9842 to 0.9846
OD of camshaft ball bearing journal . . . . . . . . . . . . . . . . . .
0.8100
0.8110 to 0.8115
OD of bushing type bearing journal . . . . . . . . . . . . . . . . .
d
Plunger outer spring:
Spring SP-9038, No. 10947155, FSN 2910-903-
4803 (used on A, B, C, D, E, F) (used on all
but LDS-427, code G Pump).
1.072
Free length, inches . . . . . . . . . . . . . . . . . . . . . . . .
380
400
Spring rate, lbs/in. . . . . . . . . . . . . . . . . . . . . . . . .
23
27 to 31
Lbs. compression at l.000-inch length . . . . . .
110
118 to 128
Lbs. compression at .765-inch length . . . . . . . . .
Spring SP903, No. 10944587, FSN 2910-619-
7586 (used on LDS-427-2, code G Pumps).
1.769
Free length, inches . . . . . . . . . . . . . . . . . . . . . .
102
109
Spring rate, lbs/in. . . . . . . . . . . . . . . . . . . . .
43
47 to 52
Lbs. compression at 1.3170-inch length . . . . . . .
67.5
71 to 79
Lbs. compression at 1.0810-inch length. . . .
e
1.3105 to l.3115
1.3100
OD of tappet assembly . . . . . . . . . . . . . .
f
1.3170
1.3125 to l.3135
ID of tappet bore in housing . . . . . . . . . . . . . . . . . . . . .
*
e-f
Fit of tappet in housing . . . . . . . . . . . . .
0.0010L to 0.0030L
*
ID of bushing type bearing bore in housing . . . . . . . . . .
0.9061to 0.9066
g
h
ID of camshaft bushing type bearing . . . . . . . . . . . . . . . . .
0.8154
0.8123 to 0.8134
Fit of camshaft unbearing . . . . . . . . . . . . . . . . . . . . . . . . . .
c-h
0.0044L
0.0008L to 0.0024L
*
OD of camshaft bushing type bearing . . . . . . . . . . . . . . . .
0.9080 to 0.9090
j
*
Fit of bushing in housing . . . . . . . . . . . . . . . . . . . . . . . . .
0.0014T to 0.0029T
g-j
*
ID of amshaft ball bearing bore in housing . . . . . . . . . . .
2.0462 to 2.0468
k
*
Fit of ball bearing in housing . . . . . . . . . . . . . . . . . . . . . . .
a-k
0.000IL to 0.0010T
*
l
ID of camshaft ball bearing
0.9839 to 0.9843
*
Fit of ball bearing on camshaft . . . . . . . . . . . . . . .
b-l
0.000IL to 0.0007T
* See paragraph 3-59
3-111
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