TM 9-2320-266-34
Figure 11-8. Piston Measurements.
Figure 11-10. Removing Piston Pin with Tool C-4158-L.
(8) Press the piston pin out of the connecting rod.
weight in grams, regardless of oversize, to maintain piston
balance. Pistons with pins are available in standard size
CAUTION
only.
When the pin falls free from the connecting
rod, stop the press to prevent damage to
NOTE
the bottom of the anvil.
Pay special attention to oversize bores
when overhauling the engine. Specifica-
(9) Remove the tool from the piston.
tions for these parts are in table 11-1.
clean and dry. Specified clearances between the piston and
c. Disassembly.
the cylinder wall are 0.0005 to 0.0015 inch. Measure the
(1) Install the bearing cap on the mating rod.
piston clearance at the top of the skirt at a 90 degree angle
(2) Remove the rings.
to the piston pin axis (figure 11-11).
(3) Arrange tool C4158-L for removal of the piston
pin (figure 11-9).
Figure 11-9. Arragement of Tool C4158-L for Removing
Piston Pin.
(4) Install the pilot on the main screw.
(5) Install the main screw through the piston pin.
(6) Install the anvil over the threaded end of the main
screw, with the small end of the anvil against the piston boss.
Be sure the spring is removed from the anvil.
(7) Install the nut loosely on the main screw and place
Figure 11-11. Meowing Piston Diameter.
the assembly on a press (figure 11-10).
Change 7
11-7
