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Page Title:
Section XVIII. REBUILD OF AIR COMPRESSOR ADJUSTABLE PULLEY, AIR INTAKE MANIFOLD, AND MISCELLANEOUS ENGINE COMPONENTS |
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 Connect a 24-volt power supply to the two
236. TESTS
terminals of the fuel pump. Loosen check nut
Caution: The flame heater fuel pump electri-
(N, fig. 432) and turn the relief valve adjust-
cal system is negative grounded. Pin "A" is
ing screw (M, fig. 432) until a reading of 90-
positive and pin "B" is negative. Do not reverse
100 psi is obtained on the pressure gage. Lock
polarity of pump during checking or installation.
the relief valve adjusting screw with 5/16- inch
Reversing polarity will permanently damage
check nut.
pump.
b. Flow Tests. Connect the flame heater
a. Relief Valve Setting. Refer to figure 444
fuel pump as shown in figure 444. Adjust the
and- connect test equipment as shown. Connect
rheostat to give the input voltages shown on
a 0-200 psi pressure gage to the outlet of the
flame heater fuel pump. Connect a hose from
flow must meet the requirements shown.
the inlet to a source of Diesel fuel (V'V- F- 800).
Section XVIII. REBUILD OF AIR COMPRESSOR ADJUSTABLE PULLEY, AIR INTAKE
MANIFOLD, AND MISCELLANEOUS ENGINE COMPONENTS
directed in paragraph 152c. Dry all
LEY
parts with compressed air.
Note. The key letters shown below in paren-
(2) Inspection. Inspect adjustable flange
theses refer to figure 445 except where other-
pulley (E) and adjustable pulley (B) for
wise indicated.
cracks and damage. Carefully inspect
all threads for galled, stripped, or
a. Removal. Remove air compressor adjust-
damaged areas. Check clamping sec-
able pulley as follows.
tions of the adjustable flange pulley for
broken or distorted sections. Check belt
(1) Remove two 3/8 x 1-1/2 cap screws (C)
surface of both pulley sections for
and 3/8- inch lock washers (D) securing
nicks, wear, and damage. Check keyway
the adjustable flange pulley (E) to the
of the adjustable pulley for galling due
adjustable pulley (B). Using adjusting
to loose operation on the compressor
pulley wrench -10935288 (figs. 23 and
crankshaft.
81), turn the adjustable flange pulley
counterclockwise to remove it.
c. Repair. Repair minor damage to belt sur-
faces of the adjustable flange pulley (E) and
adjustable pulley (B) with a fine mill file or
Note. The removal of two cap screws
crocus cloth dipped in dry-cleaning solvent or
is not required for disassembly, it just
mineral spirits paint thinner. Repair damaged
closer inspection of the
permits
threads of the adjustable pulley using a fine
threaded holes.
mill file. If threads for 3/8 x 1-1/2 cap screws
are slightly damaged, use a tap to repair the
(2) Remove 3/4- inch self-locking nut (F) se-
threads. Replace the adjustable flange pulley
curing the adjustable pulley (B) to com-
and adjustable pulley if either part is broken,
pressor crankshaft. Using a universal
cracked, or damaged beyond repair.
puller, remove the adjustable pulley
from the crankshaft.
d. Installation.
Install air compressor
adjustable pulley as follows.
(3) Remove 1/4 x 1 Woodruff key (A-11)
from compressor crankshaft.
(1) Install 1/4 x 1 Woodruff key (A-11) in
keyway of compressor shaft.
b. Cleaning and Inspection.
(2) Use a soft-faced hammer to drive the
(1) Cleaning. Clean adjustable flange pul-
adjustable pulley (B) on the compressor
ley (E), adjustable pulley (B), and re-
crankshaft. Install 3/4- inch self- lock-
lated parts using dry- cleaning solvent
ing nut (F) to secure the adjustable
and mineral spirits paint thinner as
pulley.
280
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