TM-9-2910-226-34
PUMP, FUEL, METERING AND DISTRIBUTING, ASSEMBLY
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT, MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
JUNE 1974
TM-9-2910-226-34 - Page 107 of 208
TM 9-2910-226-34
Figure 3-97. Timing device assembly, exploded view.
(2) Inspect the timing device housing (H) for
cracks, nicks, burs, and damage to mating surfaces.
Replace the housing when cracked. Minor nicks or
burs may be cleaned up with crocus cloth.
(3) Inspect the splines of the weight and spider
assembly (G), sliding gear (L), and timing device
hub (P) for damage, wear, and fit on mating sur-
faces. Remove minor burs and scratches from splines
with crocus cloth. Replace all parts having splines
which are damaged or do not fit properly with
mating surfaces.
(4) Refer to figure 3-98. Inspect the pins that
secure the weights to the spider. Weight and spiders
assembled with pin (A) should be discarded and
replaced. Weight and spiders assembled with pin (B)
can be reused if the pins have no end play and are
tight.
Figure 3-98. Comparison of timing device weight pins.
(5) Examine the weight on the spider assembly
(G) for freedom of movement. Replace the weight
and spider assembly when the weights do not move
freely.
C
. Assembly.
Assemble the timing device
assembly as follows:
(1) The parts for the universal timing device
repair kit are listed in Appendix B. When any part in
the repair kit— 5702661 except hardware items, must
be replaced, replace all parts applicable to the timing
device assembly.
(2) Refer to figure 3-97. Do not install timing
cover at this time. The timing device assembly parts
will be installed during assembly of pump.
3-28. Repair of Hydraulic Head Assembly.
NOTE
Except for the upper and lower head
preformed packings, component parts of the
hydraulic heads are not spare parts. If any
part shows evidence of wear or other damage
replace the complete head assembly. Refer to
figure 3-99. Hydraulic head assemblies
identified by American Bosch part number
HD9070A (FSN 2910-084-0259), used on
some code F pumps, are prone to cracking
between the delivery valve screw and
cylinder No. 3 port. These heads must be
replaced upon disassembly of injection
pump.
3-61
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