Traxxas 45104-1 - Manual (Page 13)

13
STEP
7:
Remove the
3x23mm cap-head machine
screws that fasten the header to the engine.
Carefully
remove
the
header
to
avoid damaging the gasket. To separate the engine
from
the engine
mount, remove the four 3x8mm cap- head machine screws.
Rebuilding
the Engine
STEP
1:
Remove the 4mm locknut from the front pipe hanger. Pull the pipe from the rear exhaust header.
STEP
2:
Unplug the blue wire from the glow plug. Remove the fuel
line from the
carburetor inlet
and from the
exhaust header pressure fitting. Disconnect the red and black wires from the EZ-Start
®
motor.
STEP
3:
Remove the EZ-Start
gearbox by removing
the three
3x8mm round-head machine screws.
STEP
4:
Use a 2.5mm hex driver to remove the yellow ground wire from the engine mount. Move the EZ-Start wiring harness out of the way. STEP
5:
Use a 2.5mm hex driver to remove the three remaining
3x10mm
cap-head
machine
screws
from the engine mount. STEP
6:
Pull the engine from the chassis. Turn the engine so that the throttle linkage to the carburetor will come out.
Changing
the piston
and
sleeve assembly
STEP
9:
Use a 5/16-inch nut driver to remove the
glow plug and copper gasket. STEP
10:
Use a 2.5mm allen wrench to remove the four 3x12mm cap-head screws that fasten the cylinder head. Rock the cylinder head gently from side to
side to
release it
from
the sleeve.
Note the
thin aluminum head gaskets. We recommend that you replace
these gaskets
with new
ones upon
reassembly.
STEP
11:
Remove the backplate and the starter shaft. Replace the backplate gasket with a new one during assembly.
STEP
12:
The piston and sleeve are a matched set. When the piston and sleeve are disassembled, they must be reassembled in the same orientation. Use a hobby knife to scratch a mark to indicate the location of the piston in relation to the pinning of the sleeve.
STEP
8:
Removing the carburetor is not necessary to rebuild the engine, unless you intend to replace the internal bearings of the engine. Remove the carburetor by loosening the 3mm locknut and pulling the carburetor straight up.