RAMSET TRAKFAST Operating instructions

TRAKFAST REPAIR MANUAL
6
Rev. 09/07
TOOL OPERATION
OVERVIEW
Magazine Assembly
The magazine assembly has two functions. Its primary func-
tion is to store and feed fasteners into the nose of the tool.
Its secondary function is to house the battery and battery
contact assembly.
Motor Assembly
The motor assembly is made up of components that:
• Control the piston assembly
• Control intake of the fuel/air mixture
• Vent exhaust gases
This assembly generates and controls forces that drive
the fasteners. It will require the majority of routine service
and/or repair.
• Piston Assembly
• O-Rings
Handle Assembly
The handle assembly contains electrical components, and
the fan motor and fan. The electrical components provide
spark for combustion. The fan mixes fuel with air and also
cools the motor.
Cover and
Filters
Fuel Cell
Compartment
Battery LED
Indicator Light
(opposite side) HANDLE ASSEMBLY
MAGAZINE ASSEMBLY
Magazine
Locking Knob
Trigger
Battery Compartment
(opposite side)
Follower Release
Lever
Follower
Lockout Bar
Nose
Motor
Housing
MOTOR ASSEMBLY

TRAKFAST REPAIR MANUAL
7
Rev. 09/07
TOOL OPERATION
START and PRE-COMBUSTION
When lower probe (E) is pressed against the work
surface, cage (F) is forced against the spring (G).
Combustion chamber (H) is raised up against
cylinder head (I), and O-Rings (J & M) seal off the
combustion chamber, creating an air tight seal.
This initial movement, pressing the lower probe
against the work surface, causes the fuel cell/meter-
ing valve assembly to pivot. This meters a precise
amount of fuel through the cylinder head and into
the combustion chamber cavity (K).
As the combustion chamber is raised, fan/enable
switch (L) is depressed and the chamber lockout
bar is moved out of the way of the cam. The fan
starts and mixes air with a metered amount of fuel
to provide a combustible mixture.
The chamber lockout bar prevents the trigger from
being activated until the lower probe is pressed
against the work piece, raising the combustion
chamber.

TRAKFAST REPAIR MANUAL
8
Rev. 09/07
Combustion
Depressing the trigger activates the ignition circuit.
This causes a spark (N) to jump the gap between
the spark element and cylinder head, igniting the
fuel/air mixture in the combustion chamber. Pis-
ton assembly (O) is forced downward driving the
fastener into the work surface.
TOOL OPERATION

TRAKFAST REPAIR MANUAL
9
Rev. 09/07
TOOL OPERATION
Power/Exhaust
Downward movement of the piston assembly, past
exhaust ports (P), allows exhaust gases to exit.
The pressure of the exhaust gases against the flat
washer compresses the wave washers, allowing the
gases to flow through the mid-check area (Q) and
out of the tool through the exhaust ports in the bot-
tom of the housing (R).
At the bottom of stroke, the piston assembly strikes
bumper (S).

TRAKFAST REPAIR MANUAL
10
Rev. 09/07
TOOL OPERATION
Return
Reduced pressure within the combustion chamber
allows wave washers (T) to reseal the combustion
chamber.
Rapid cooling of gases trapped in the combustion
chamber (U) creates vacuum.
This vacuum is strong enough to lift and hold the pis-
ton assembly in its starting position. As the piston as-
sembly moves up the sleeve, air is drawn in through
ports in the housing nose (V).

TRAKFAST REPAIR MANUAL
11
Rev. 09/07
TOOL OPERATION
Purging
The combustion chamber drops when the tool is
lifted from the work surface and the trigger is re-
leased. This opens the seal between the combustion
chamber and cylinder head O-Ring (W) and sleeve
O-Ring (X).
The fan is now able to circulate fresh air into the
combustion chamber, cooling the sleeve (Y) and
purging any remaining exhaust gases from the tool
through ports (Z).