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 TM 55-4920-405-13&P
Disconnect the tubing from the rear of
(b)
Remove flywheel (12).
(a)
the gage.
(c)
Remove alternator stator (11).
Remove the hardware that retains the
(b)
(d)
Remove governor (23).
u - c l a m p . Push the gage out of the
(e)
Remove the gear cover screws and
control panel.
Replace the defective gage.
(c)
(f) Drive out two dowel pins at the right
side of the gear cover.
d. Miscellaneous.
(g) Remove the gear cover and gear cover
gasket.
( 1 ) Tires and Wheels. (See figure 4-9.) To
remove a tire and wheel, proceed as
( 1 5 ) Cover Plate. To remove cover plate (20,
follows:
(a) Jack up the corner of the test stand to
(a) Remove the screws and lockwashers
raise the tire off the ground.
that attach the cover plate to the
(b) Remove lug nuts (1) and washers (2).
crankcase assembly.
(c) Remove tire (4) with assembled tube
(b) Remove the cover plate and cover
and wheel halves from the test stand.
plate gasket.
(c) Clean cover plate, replace it if it is
------ --
CA--TION.
--U--
damaged, and replace the cover plate
gasket.
At this point, remove valve cap (6) and
stem (7) from the tire that you are re-
(16) Fuel Tank. To remove fuel tank (19, fig-
moving. Make sure that tube (3) is
completely deflated before proceeding
with the next step.
(a) Remove all hydraulic system compo-
nents around the fuel tank.
(d) Remove nuts (8), washers (9), and
(b) Make sure that there is no gasoline in
bolts (10).
the fuel tank.
(c) Disconnect the fuel line from the fuel
(e) Using a tire iron or other prying tool,
separate two wheel halves (5 and 11).
Remove the tire and deflated tube.
(d) Remove the hardware that attaches the
(f) Replace the defective tire.
fuel tank to test stand frame (18).
(e) Remove the fuel tank.
( 2 ) Brake Drum. To remove the brake drum
(f) Clean and repair, or replace a
from a wheel, proceed as follows:
damaged fuel tank as needed.
Remove the tire and wheel from the
(a)
( 1 7 ) Crankcase Assembly. To remove crank-
axle on which the brake drum you
case assembly (22, figure 4-8), proceed
want to remove is located.
as follows:
Remove the cotter pin from the
(b)
castellated locknut that attaches the
(a)
Remove shrouding.
brake drum to the axle.
(b)
Remove ignition wires.
Remove the castellated locknut,
(c)
(c)
Remove spark plugs.
washer, and bearing from the axle.
(d)
Remove the magneto.
Slide the brake drum off over the
(d)
(e)
Remove the oil filter.
axle spindle and brake assembly.
(f)
Remove the fuel strainer.
Replace the defective brake drum.
(e)
(g)
Remove the fuel pump.
(h)
Remove the carburetor.
(i)
Remove the governor.
4-5. DETAILED REPAIR INSTRUCTIONS.
(j)
Remove the two cylinder heads and
cylinder blocks.
a . Electrical System.
(k) Remove the flywheel.
(1) Remove the alternator.
(m) Remove the engine gear cover.
(1) Ignition Wire Assembly. To repair the
(n) Remove the cover plate.
ignition wire assembly, proceed as
(o) Remove the engine mounting bolts.
follows:
Lift the crankcase assembly out of the
test stand frame.
(a) Replace damaged end connectors.
(p) Clean and repair, or replace the
(b) Using insulating tape, wrap all insula-
crankcase assembly as necessary.
tion breaks. Use at least four layers
of tape over the insulation breaks.
(18) Engine Oil Pressure Gage. To remove
(c) If an ignition wire is beyond repair,
ENGINE OIL PRESSURE gage (2, figure
replace it.
4-21
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