ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320BO-MME-OOO
6-3. ELECTRICAL HIGH PRESSURE FUEL
PUMP. (cont)
c.
Electric Motor Repair.
(1) Commutator Turning Procedure.
(a) Place
armature shaft in
1/4-inch collet.
with female center.
commutator
end of
machine lathe with
Support slotted end
(b) Set speed at 2000 rpm and
turn a smooth finish to a maximum of 16
microinches.
A diamond
tool
will
usually give best results.
Remove as
little stock as is required in order to
minimize burrs.
(c) Use stiff-bristled brush to
remove any copper chips from commutator
slots.
NOTE
If it is
necessary
to turn
commutator to a diameter less
than
0.700
inch
(1.778 cm),
replace armature.
(2) Replacing Broken Brush Guides.
(a) Remove setscrews (1, figure
6-6) from rear end bell (2) to release
brush guides (3).
(b) Heat brass insert in brush
guide with soldering iron. When solder
is
soft,
pull terminal clip (4) and
leadwire assembly (5) out of brush
guide.
(c) Ensure that terminal clip
is properly attached to leadwire and
free of excess solder.
(d) Remove brush guide.
(e) Insert new brush
guide.
Ensure that set screw hole is alined
with hole in rear end bell.
(f) Install
set
screws
and
tighten lightly.
Put drop of thread-
locking compound (MIL-S-46163) on each
set screw.
(g) Make sure leadwire assembly
is positioned as shown in figure 6-6.
(h) Push terminal
clip
into
brush guide until it snaps into posi-
tion.
Solder in place.
(i) Position red lead against
inside wall of rear end bell and secure
with drop of silicone rubber.
d.
E
(1)
6-5) onto
(2)
lectric Motor Reassembly.
Press
bearing
(14,
figure
front armature shaft.
Place
shim
set
(17) and
deflector (16) on rear armature shaft.
(3) Press bearing (15) onto rear
armature shaft.
WARNING
To prevent injury, ensure that
compressed
air is
used
with
caution.
Wear eye protection and
gloves.
(4) Use compressed air to remove
excess carbon dust and other contamina-
tion from motor.
(5) Insert armature (13) into
motor stator (12).
Install coupling
(8.1) and front end bell (8). Do not
attach pump until
after motor test
(paragraph 6-3e).
6-8
