Onan B43E series User Manual

CRANKSHAFT
GEAR
PULLER
E MARKS
LIGN WHEN
ING TIMING
EARS
VT-1029
FIGURE 11. TIMING GEAR REMOVAL AND INSTALLATION
PISTONS AND CONNECTING RODS
Observe the following procedure when removing pistons
and connecting rods from the engine.
1. Drain Oil.
2. Remove the cylinder head and oil base pan from the
engine.
3. Remove the ridge from the top of each cylinder with
a ridge reamer before attempting piston removal
(Figure 12).
1- Improper piston removal can
cause piston damage. Use ridge
reamer to remove cylinder ridge before removing
piston.
FIGURE 12. REMOVING RIDGE FROM CYLINDER
4. Turn the crankshaft until the piston is at the bottom
of its stroke and remove the connecting rod nuts. Lift
the rod bearing cap from the rod and push the rod
and piston assembly out through the top of the
cylinder using a hammer handle. Avoid scratching
the crankpin and cylinder wall when removing the
piston and rod.
Mark each piston and rod assembly
so they can be
returned to their respectivecylinders after overhaul.
Keep connecting rod bearing caps with their
respective rods.
L
L
5. Remove the piston rings from the piston with a
piston ring spreader asshown in Figure 13. Remove
the piston pin retainer and push the piston pin out.
FIGURE 13. REMOVING PISTON RINGS
Remove dirt and deposits from the piston surfaces with
an approved cleaning solvent. Clean the piston ring
grooves with agroove cleaner or the end
of a piston ring
filed to a sharp point (Figure 14). Care must be taken not
to remove metal from the groove sides.
ACAUT~ON Improper pisfon cleaning can cause
m piston damage. Do nof use a caustic
cleaning solvent
or wire brush for cleaning pistons.
When cleaning the connecting rods in solvent, be sure
to include the rod bore.
Blow out all passages with
compressed air.
104
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Onan B43E series Specifications

General

Brand	Onan
Model	B43E series
Category	Engine
Language	English