Traxxas 4 Nitro Tec 4804 Operating Instructions Manual Download

Page: 16 / 19

STEP 7:

Remo

e the 3x23mm roundhead machine

scre

ws that f

asten the header to the

engine

Carefully remo

e the header to

oid damaging the gask

et.

separ

ate the engine from the engine

mount, remo

e the f

our 3x8mm caphead

machine scre

REB

UILDING THE

ENGINE

STEP 1:

Remo

e the 4mm loc

ut from the front

pipe hanger

Pull the pipe from the rear

xhaust header

STEP 2:

Remo

e the y

ello

w g

round wire from the EZ-Star

STEP 3:

Unplug the b

lue wire from the glo

w plug.

Remo

e the

fuel line from the carb

uretor inlet and from the e

xhaust

header pressure fitting.

Disconnect the red and b

lac

wires from the EZ-Star

t motor

STEP 4:

the car on its side

With a 2mm he

x dr

er and a

Phillips head scre

wdr

, remo

e the 6 engine mount

bolts

STEP 5:

Pull the engine from the chassis

n the engine

so that the flywheel will clear the br

e disk and the

throttle linkage to the carb

uretor will release

STEP 6:

Remo

e EZ-Star

t from engine b

y remo

ving the tw

remaining Phillips head scre

STEP 9:

Changing the piston and slee

ve assemb

Use a 5/16 inch n

ut dr

er to remo

e the glo

w plug and

copper gask

et.

STEP 10:

Use a 2.5mm allen wrench to remo

e the f

our 3x12mm

cap head scre

ws that f

asten the cylinder head.

Roc

the cylinder head gently from side to side to release it

from the slee

Note the thin alumin

um head gask

ets

recommend that y

ou replace these gask

ets with

w ones upon reassemb

STEP 11:

Remo

e the bac

kplate and the

star

ter shaft.

Replace the bac

kplate

gask

et with a ne

w one dur

ing

assemb

STEP 12:

The piston and slee

e are a matched set.

When the

piston and slee

e are disassemb

led, the

y m

ust be

reassemb

led in the same or

ientation.

Use a hob

knif

e to scr

atch a mar

k to indicate the location of the

piston in relation to the pinning of the slee

STEP 8:

Remo

ving the carb

uretor is not necessar

y to reb

uild

the engine

, unless y

ou intend to replace the inter

nal

bear

ings of the engine

Remo

e the carb

uretor b

loosening the 3mm loc

ut and pulling the carb

uretor

str

aight up

Summary of Contents for 4 Nitro Tec 4804

Page 1: ...OPERATING INSTRUCTIONS TEC COVERS MODELS 4804 AND 4810 ...

Page 2: ...he fill neck The model can carefully be refueled while the engine is running Keep your fuel bottle tightly capped 8 Install the air filter Page 6 Remove the black cap which covers the carburetor air intake Locate the rubber air filter base and install it on the carburetor intake Insert the pre lubed foam element into the rubber base 9 Switch on the radio system Page 5 Always turn the transmitter o...

Page 3: ...as a good special purpose car fuel Some fuels are capable of destroying your TRX Pro 15 engine If you must use a fuel other than those listed contact TRAXXAS first at 1 888 TRAXXAS to find out if the fuel is safe for use with TRX engines FUEL BOTTLE Fuel is usually purchased by the gallon or quart so a smaller bottle with a dispensing tube is required to fill the fuel tank The fuel tank in the Nit...

Page 4: ...t the transmitter uses to send signals to the model All Traxxas RTR models operate on a 27 MHZ FREQUENCY BAND CHANNEL The 27 MHZ FREQUENCY BAND is divided into 6 CHANNELS so that up to six cars can be operated simultaneously These CHANNELS are referred to by their number and flag color The chart below lists the channels and their flag colors CRYSTAL X TAL The CRYSTAL is the plug in device that det...

Page 5: ...groove in the rim Make sure that the foam insert is not pinched between the wheel and the tire 4 Glue the tires to the rim by pulling the tire back from the rim and placing a drop of thin CA glue onto the bead CAUTION Wear eye protection to prevent injury from glue spattering into your eyes Quickly re seat the tire bead into the rim and allow to dry 5 Repeat step 4 at several points around the tir...

Page 6: ...tral posi tions 4 With the front wheels off the ground operate the steering control on the transmitter channel 1 Check for rapid operation of the steering servo and that the steering mechanism is not loose or binding If the servo operates slowly check for weak batteries Turn the steering trim control on the transmitter to adjust the servo so that the front wheels are pointing straight ahead Check ...

Page 7: ...o system is not waterproof Avoid driving through puddles wet grass or mud Water could damage the electronics Do not continue to operate the Nitro 4 Tec with low batteries After the battery power drops below a certain point the model will continue with the last command it had from the transmitter Indications of low battery power include slow operation and sluggish servos On the transmitter a flashi...

Page 8: ...f you press the EZ start button too long you will flood the engine and the EZ Start will not be able spin it over see page 13 With a full tank of fuel it will only take a second to move the fuel up to the carburetor STEP 7 SHUTTING OFF THE ENGINE Before starting the engine it is important to know how to shut it off The correct method is to pinch and hold the carburetor s fuel line at idle speed un...

Page 9: ...ume of fuel flowing through the engine look for the following conditions 1 The engine should accelerate sluggishly 2 There should be a thick trail of blue smoke coming from the exhaust If you do not observe the conditions above then turn the high speed needle out 15 counterclockwise and retest Do not run at full speed during the first tank of fuel Do not rev the engine with the wheels off the grou...

Page 10: ...he throt tle shaft see the drawing on page 7 The low speed mixture affects the idle quality and the low end engine power and throttle response To check your low speed mixture setting perform this simple test 1 Drive the car for several minutes until the engine is in its nor mal operating temperature range 2 Pull it in stop and listen to the idle speed If after a few seconds the idle speed begins t...

Page 11: ...lignment settings for the Nitro 4 Tec with stock tires and inserts 11 Contact Traxxas for assistance 1 888 TRAXXAS 972 265 8000 outside USA E mail us at support Traxxas com 1 Remove the right rear wheel Remove the E clip from the two speed shaft Slide the pulley and belt off of the shaft being careful not to lose the pin that sits under the pulley Remove the pin Slide the spur gears off of the sha...

Page 12: ... at support Traxxas com 3x14mm Washerhead Self tapping screws 3x10mm Countersunk Self tapping screws Installing the front body mounts Installing the rear body mounts Foam Body Bumper Front Camber Degrees 1 0 Rear Camber Degrees 1 0 Front Caster Degrees 12 0 Front Toe In Degrees 0 0 This setting is achieved by having the 1mm caster spacer in the front and the 2mm caster spacer in the rear where the...

Page 13: ... e o f w i n d s h i e l d A l i g n e d g e a t b a s e o f r e a r w i n d o w cut out for EZ Start plug Front Rear These templates have been provided to locate the holes on the body for the front and rear body mounts Cut out the templates along the solid lines as close to the edge as possible Tape the templates to the body Use a Dremel motor tool or tapered reamer to make the holes in the body ...

Page 14: ...ton for several seconds This lights the glow plug and burns off any remaining fuel Reconnect the EZ Start motor Do not prime the engine Partially open the throttle and press the EZ Start button The engine should start immediately GLOW PLUGS The glow plug in your engine is a consumable item which must be replaced periodically to maintain peak performance and starting ease To test for a leaking glow...

Page 15: ...ed mixture adjustment page 7 9 26 Low speed mixture too rich Lean the low speed mixture adjustment page 7 9 27 Idle speed set too low Increase idle speed page 9 28 Fuel flow blocked Check that all fuel lines are clear with no pin hole leaks Check for dirt blockage in the carburetor fuel inlet and high speed needle seat Install inline fuel filter page 13 29 Air bubble in the fuel line Prime the eng...

Page 16: ...e STEP 6 Remove EZ Start from engine by removing the two remaining Phillips head screws STEP 9 Changing the piston and sleeve assembly 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...

Page 17: ... the wrist pin also Rinse thoroughly with dena tured alcohol and lube with after run oil STEP 13 Pull the sleeve straight up and out of the crankcase If the sleeve will not move rotate the crankshaft until the sleeve pushes up STEP 14 Rotate the crankshaft to bottom dead center Lightly grab the connecting rod with a pair of needlenose pli ers and gently pull it off of the crankshaft journal STEP 1...

Page 18: ...ee step 14 STEP 25 To assemble the connecting rod and piston place a drop of caster oil in the top end of the connecting rod Insert the wrist pin through the piston and the top of the connecting rod Secure the wrist pin with the G clip Make sure the G clip fits securely into the groove machined in the piston Be careful not to scratch the sides of the piston STEP 26 Reinstall the crankshaft into th...

Page 19: ... 1100 Klein Road Plano Texas 75074 Phone 972 265 8000 Fax 972 265 8011 Traxxas U K P O Box 1128 Winterbourne Bristol BS36 2SH England Phone 44 117 956 1002 Fax 44 117 956 1121 Find Traxxas online at www Traxxas com ...

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Traxxas 4 Nitro Tec 4804, Operating Instructions Manual

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