Figure 3-26. 1/4 Turn Head Bolts in Sequence
CYLINDER
1. Raise the cylinder just enough to place clean shop towels
under the piston.This will prevent any dirt or debris, such
as broken ring pieces, from falling into the crankcase bore.
NOTE
Exercise caution to avoid bending the cylinder studs. Even a
slight bend or nick can cause a stress riser leading to stud
failure.
2. Carefully remove the cylinder. Exercise caution to avoid
bending the cylinder studs. As the piston becomes free of
the cylinder, hold it upright to prevent it from striking the
studs or dragging across the stud thread area.
3. Mark cylinder FRONT or REAR as appropriate.
4. Slide approximately 6.0 in. (152 mm) of plastic tubing,
rubber hose or conduit over each cylinder stud. Use
material with I.D. of 0.5 in. (12.7 mm) to protect cylinder
studs and piston from damage.
5. See Figure 3-27. Remove o-ring seal (4) from the bottom
of the cylinder liner. Discard o-ring seal.
6. See Figure 3-28. Remove o-ring from dowel pin (4) on
base of cylinder deck. Discard o-ring.
7. For inspection and repair information, see 3.23 CYL-
INDER.
1. Dowel pin
2. Head gasket
3. Cylinder
4. O-ring seal
Figure 3-27. Cylinder Assembly
PISTON
TOOL NAMEPART NUMBER
PISTON PIN CIRCLIP
REMOVER/INSTALLER
HD-42317-A
PISTON PIN REMOVERHD-42320-A
1. Verify that clean shop towels are properly positioned over
the crankcase bore to prevent the piston pin circlip from
falling into the crankcase.
Wear safety glasses or goggles when removing or
installing piston pin retaining rings. Piston pin retaining
rings are compressed in the ring groove and can fly out
when removed from the groove, which could result in
serious eye injury. (00293a)
2. See Figure 3-28. Remove the piston pin circlip.
a. Insert the PISTON PIN CIRCLIP
REMOVER/INSTALLER (Part No. HD-42317-A) (1)
into the piston pin bore. Position claw on tool in slot
of piston (2) (directly under circlip).
b. Hold a shop towel over the piston pin bore in case a
circlip should fly out during removal. Squeeze the
handles of the tool together and pull from bore.
Remove circlip from claw and discard.
3-30 2008 Dyna Service: Engine
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