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Maintaining and Storing Your Nitro 4-Tec
Your Nitro 4-Tec requires timely maintenance in order to stay in
If the engine is
worn or damaged
top running condition. Neglecting the maintenance could allow
enough to require
dirt, deposits, and moisture to build up inside the engine
replacing the piston,
leading to internal engine failure. The following procedures
sleeve, or connecting rod,
should be taken very seriously.
consider exchanging your
old engine for a brand new
After each hour of running:
engine under the terms of
the Traxxas Lifetime Engine
Replacement Plan (ERP). It
could save you time and
effort. Details are in your
model's documentation
package or on our website.
The TRX 2.5 is
After each running session:
designed to be easy
to rebuild. Critical
engine components such
as the crankcase,
crankshaft, and engine
bearings are made to
extremely high quality
standards and should
under normal
circumstances outlast
multiple sets of pistons,
sleeves, connecting rods,
and wrist pins
(reciprocating assemblies).
It could be more
economical for you to
continue to use your good
bearings and crankshafts,
and simply replace the
reciprocating assembly as
needed. Engine assembly is
not difficult and replacing
the reciprocating assembly
does not require any
special tools or skills.
44
Clean and re-oil the air filter.The instructions for this
procedure are on page 27. We cannot stress enough the
value of cleaning your air filter at the scheduled intervals.
Do not neglect your air filter maintenance!
Clean the outside of the engine of accumulated dirt, oil, and
grime. Accumulated grime will decrease the engine's ability to
cool itself.
Perform after-run maintenance on the engine.This clears the
engine of destructive moisture and other corrosive deposits.
This is extremely important for the life of the engine. See
page 42 for after-run maintenance procedures.
Inspect the vehicle for obvious damage or wear. Look for:
1. Loose or missing screws
2. Cracked, bent, or damaged parts
3. Cut or loose wiring
4. Cut or kinked fuel lines
5. Signs of fuel leakage
Inspect the gears for wear, broken teeth, or debris lodged
between the teeth.
Other periodic maintenance:
Piston/sleeve: The life of the piston and
sleeve will vary greatly with how the
engine was used and maintained.The
piston and sleeve should be replaced
when they no longer seal effectively
(loss of compression). Symptoms include
the engine being difficult to start when
warm, stalling when warm, and stalling
when throttle is suddenly closed to idle.
Replace the wrist pin and G-clip
whenever the piston and sleeve are
replaced.
Connecting rod: The connecting rod
should be replaced when the piston and
sleeve are replaced or after three gallons
of fuel, whichever comes first. Also
replace the piston wrist pin and G-clip whenever the
connecting rod is replaced. As with other internal engine
components, connecting rod life depends engine's usage
and the quality and frequency of the engine maintenance.
EZ-Start: The cush drive elements in the EZ-Start drive
unit should be inspected after 3-gallons of fuel. If the cush
drive elements appear deformed or hardened they should
be replaced. Inspect the EZ-Start gears for any signs of
wear. Damaged gears should be replaced. Coat the gears
with a thin layer of white lithium grease.
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