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 110 of 208
TM 9-2910-226-34
(4) With plunger stationary, check backlash of
drive gear. Backlash must not exceed 0.025-inch.
(5) Refer to figure 3-102. Position plunger sleeve
to expose plunger spill and fill ports. Using a
magnifying glass inspect the spill port and plunger
for evidence of erosion, wear patterns, nicks, burs or
scratches. If errosion is evident it will appear as
nibbling around around the fill and spill ports. If any
damage is evident, it is necessary to replace the
complete head assembly.
c. Assembly.
Refer to figure 3-100. Lubricate and
install new hydraulic head upper and lower
preformed packings (A) and (B).
3-29. Repair of Tappet Assembly.
a. Disassembly.
Refer to figure 3-103. Remove tappet roller pin (C)
and tappet roller assembly (A) from tappet guide
(B).
Figure 3-103. Disassembling or assembling tappet assembly.
b. Inspection.
Inspect the tappet assembly as
follows:
(1) Inspect the tappet guide (B) for evidence of
wear patterns.
(2) Check the inside and outside diameter of
tappet roller assembly (A) and outside diameter of
tappet roller pin (C), and the plunger outer spring
(T, fig. 3-109) against the limits specified in the
repair standards (para 3-60 and 3-61).
(3) Replace the tappet assembly or
they do not meet these requirements.
spring when
c. Assembly.
Refer to figure 3-103 and reverse the
sequence of instructions to assemble the tappet
assembly.
3-30. Repair of Quill Shaft Assembly.
NOTE
Components of the quill shaft assembly are
not spare parts; do not disassemble.
a.
Refer to figure 3-104. Check end play clearance
between quill shaft gear and shaft spacer. Clearance
shaft spacer. Clearance should be 0.001 to 0.006
inches. Inspect gears for chipped, cracked or broken
gear teeth.
b.
Inspect tapped hole for stripped or damaged
threads. Repair threads with suitable tap if possible.
c.
If threads are stripped, end play is excessive, or
gears are damaged, replace complete assembly.
Figure 3-104. Inspection of quill shaft assembly.
3-31. Repair
of Camshaft Assembly.
a. Dis-
assembly.
Disassemble camshaft assembly as
follows:
(1) Refer to figure 3-105. Place camshaft and
associated parts in a vise as shown. Straighten tabs
on bearing retaining lockwasher (A) and remove
bearing retaining locknut (B), using wrench–5120-
870-6926. Remove lockwasher.
3-64
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