Rovan LT-4WD User manual

1
02
04
12
14
18
25
A Instructions and Precautions
B Installation guide
C Fuel Preparation
D Starting and Running
E Tuning Reference
F Exploded views
Welcome to use Rovan LT Truck with updated 4WD shaftdrive design and
incorporated alloy chassis and High-strength plastic materials. Please read this
manual carefully and make it fully understood, which would bring you more fun of
operating this product.
It is a remote control vehicle with high performance. Power is from a 2T gasoline
engine. LT need regular maintenance to make it optimize performance. Changing
worn out or damaged parts regularly would make it keep best situation.
Welcome ROVAN LT-4WD
Contents
Rovan own the reserved explanation right for all instructions and terms.

2
Warning:
Read the ENTIRE instruction manual to
become familiar with the features of the
product before operating. Failure to operate
the product correctly can result in damage
to the product, personal property and cause
serious injury. This is a sophisticated hobby
product. It must be operated with caution
and common sense and requires some basic
mechanical ability. Failure to operate this
product in a safe and responsible manner
could result in injury or damage to the product
or other property. Do not attempt disassembly,
use with incompatible components or augment
product in any way without the approval of
ROVAN company. This manual contains
for safety, operation and maintenance. It is
essential to read and follow all the instructions
and warnings in the manual, prior to assembly,
setup or use in order to operate correctly and
avoid damage or serious injury.
SECTION A
Notice
Procedures, which if not properly followed, create a possibility of physical property damage.
Caution
Procedures, which if not properly followed, create the probability of physical property damage AND
a possibility of serious injury.
Warning
Procedures, which if not properly followed, create the probability of property damage, collateral
damage, and serious injury OR create a high probability of superficial injury.
Meaning Of Special Language
Instructions and Precautions

3
Attentions
• Not for Children under 14 years. This is
not a toy.
• Caution: Always use 2.4Ghz transmitter or
more stronger signal frequency transmitter
to operate it.
• Warning: Failure to follow all instructions
can to damage to your vehicle, property
damage and bodily injury or death
• Notice: If you made changes or
adjustments not shown in the instruction
manual, your vehicle may be damaged. To
prevent any serious personal injury and/or
damage to property, please be responsible
when operating all remote controlled
models
• Warning: This model is controlled by a
radio signal subject to interference from
many sources outside your control. This
interference may cause momentary loss of
control, so it is advisable to always keep
some distance in all directions around
your model as a safety margin to avoid
collisions
• Notice: Always ensure all screws and nuts
are tightened.
• Notice: Always carefully follow the
directions and warnings for this and any
optional support equipment
• Warning: Always keep all chemicals, small
parts and anything electrical out of the
reach of children.
• Notice: Always ensure the failsafe is
properly set during binding.
• Notice: Always operate your model in
an open area away from cars traffic and
people.
• Warning: When operating this vehicle,
always keep it at least 20 feet from
spectators, especially small children
• Notice: Never run this vehicle in or through
water
• Notice: Never run your model in a public
street where damage can occur.
• Notice: Never run your model with low
transmitter batteries
• When finished operating, always power
off the engine first, then the receiver, the
transmitter
• Notice: Always perform maintenance on
the vehicle after each and every use.
• Notice: Due to engine vibration, all screws
and nuts will need to be checked to ensure
they are tight.
SECTION A
Instructions and Precautions

4
Installation Guide
Included Components
Needed Equipment
CAUTION: For fuel mixing instructions, safety precautions and guidelines, see Section B.
Included Components And Needed Equipment
SECTION B
Body+Receiver+Transmitter+ Servos+ Engine+ Receiver battery
Fuel
2T engine oil
Receiver
Battery,
Charger,
Rovan
Manual
Tool Bag
#0 Screwdriver Standard Screwdrive
ROVANLT
INSTRUCTION

5
Remove the 4 clips and 4 large screws from
the bottom of the side guards as shown.
Vehicle Preparation
Battery Charging Precautions
Charging Warnings And Precautions
Removing The Body
• Read all safety precautions and literature
prior to use of this product.
• Never leave the battery and charger
unattended during use.
• Never allow minors to charge battery
packs.
• Always inspect the battery for damage
before charging.
• Never attempt to charge dead or damaged
batteries.
• Never charge a battery if the cable has
been pinched or shorted.
• Never allow batteries or charger to come
into contact with moisture at any time.
• Never charge batteries in extremely hot or
cold places(recommended between 50-
80 degrees Fahrenheit/10-27 Celsius)or
place in direct sunlight.
• Always use only NiMH rechargeable
batteries. This Charger cannot charge
batteries such as “heavy duty,” “alkaline
battery,” mercury battery.”
• Always make connecting correct between
positive & negative pole and battery
charger.
• Please cut off battery and charger after
charging.
• Please terminate all process and contact
engineer of Rovan if there is something
wrong with your product.
• Please make sure you know charging
or releasing capacity of battery, and use
correct battery accord with charger.
• Always keep checking battery temperature
when charging.
• *Please stop charging if charger or battery
has become too hot or out of shape.
Warning:
Failure to exercise caution while using
this product and comply with the following
warnings could result in product malfunction,
electrical issues, excessive heat, FIRE, and
ultimately and property damage.
Installation Guide SECTION B

6
Charging The Receiver Battery
1. Remove the retaining clip and battery box
lid.
2. Remove the receiver battery from the
battery box.
3. Connect the receiver plug to the battery
charger.
4. Plug the battery charger into wall outlet.
Charge the battery for 8 hours. DO NOT
exceed 10 hours charge time.
5. Monitor battery while charging.
6. When the battery is fully charged: (a)
disconnect the battery and (b) remove the
battery charger from the wall outlet.
7. Place the receiver battery back in the
battery box and connect the battery plug to
the switch plug. The battery wire must be
neatly folded in front of the battery and the
foam block must be placed on top of the
wires.
8. Reinstall battery box lid and the retaining
clip.
Installation Guide SECTION B
3
7
2
4

7
Installation Guide SECTION B
Transmitter Manual
Transmitter
FS G T3 B-
On/Off
Brake
Stop
Throttle
MODEL NAME REV E POINT
TRIM D/R EXP ABS
turn rightturn left
1
4 5 6
2 3
1. name
2. reverse for servo
3. max angle adjustment of servo
4. balance micro-adjustment of servo.
5. servo balance
6. brake adjustment

8
Transmitter Manual
Operating Example
Adjustment Before Starting
please open transmitter firstly,then open
power source of receiver;
make sure no interference from same
frequency around;baja can be worked on if
you think everything is ok;
stop operating it if frequency has problem.
E POINT ：adjusting max range of left or right of
servo
REV：adjustment of reverse or forward
TRIM：micro-adjustment of servo center to make
balance.
ABS：brake type:quick-frying stop,quick anti-
explosion,slow anti-explosion.
if we need to adjust "E point".please follow
below steps：
1. turn knob "ENTER",when light move to
"E POINT";
2. pressing"Enter",you can see no."1"in
a flicker situation,then turn"Enter"to
change between steering servo and
throttle servo;pressing "end" to change
to 100% to reach adjustment of swing
range;pressing"ENTER"again to quit
operation.
1. END
2. ENTER
3. “1”means steering servo and“2”means throttle servo.
4. Range and direction of servo are controlled by arrow
on the number.
1
3 4 2
1 100%
Installation Guide SECTION B

9
1. Set all trims(and sub-trims if included)on
your transmitter to “0”or neutral(half way
between end points).
2. Remove the cover of the radio box and
note that the bind plug is installed into
the first port marked “BINE/RS” of the
receiver.
3. Turn on the power-a light will flash at the
right front corner of the receiver.
4. Turn on your transmitter and follow the
instructions in your transmitter manual for
binding.
5. When the light in the receiver stops
blinking and is on solid, the radio is
bound.
6. Turn off the power, remove the bind plug,
and reinstall the radio box cover.
These are starting points for your transmitter. You may have to adjust the “Trim” and “Sub-Trim” as
noted in the radio manual to set the neutral position of the linkages. Transmitters without sub-trim
may require mechanical adjustment to the linkages.
• When binding, follow the failsafe instructions of
your specific transmitter so that the throttle will
be reduced if the signal is lost.
• Always remove the bind plug from the receiver
after binding is complete.
• Never plug receiver battery packs into
telemetry ports marked RPM,TEMP,or LAP.
This will damage the receiver.
• Make sure the antenna plug in the antenna
tube fully.
• It is necessary to rebind when different failsafe
positions are desired or when throttle or
steering reversing has been changed.
Transmitter Setup
Caution
The Binding Process
Installation Guide SECTION B

10
Adjust the steering trim to center the tires. Use
sub-trim (see your transmitter's instruction
manual) if needed. If steering output arm is not
close to its desired neutral position after the
binding process and sub-trim, please take the
following steps:
1. Make sure trim and sub-trim are set to “0”or
neutral.
2. Remove the servo output arm using a
Phillips screw driver and included Allen
driver and replace the arm in correct
orientation.
3. Trim the steering as described above.
Steering Trim
Installation Guide SECTION B
Front

11
Adjust the throttle trim so the carburetor is
completely closed at neutral and there is a little
gap between the servo arm and collar (Fig.
A:gap should be less than 1 mm).Use sub-trim
(refer to your transmitter instructions)if needed.
If throttle output arm is not close to its desired
neutral position after the binding process and
throttle cannot be centered using trim and sub-
trim, please take the following steps:
1. Make sure trim and sub-trim are set to “0”or
neutral.
2. Remove the servo output arm using a
Phillips screw driver and replace the arm in
correct orientation.
3. Trim the throttle as described above.
Throttle Trim
Notice:
Always ensure servo arm is parallel with the
vehicle center line at neutral and the gap in the
throttle linkage is less than 1 mm. Failure to do
so could result in engine malfunction causing
loss of control of the vehicle, resulting in property
damage and injury.
Installation Guide SECTION B
Fig.A
1mm

12
Close Setup
Turn off the receiver first,then turn off the
transmitter.
Notice:
You will lose control of vehicle if you suddenly
shut off the transmitter without setup of the
failsafe.
Turning The System Off
Replacing The Body
Replace the 4 clips and 4 large screws in the
bottom of the side guards as shown.
Installation Guide SECTION B
1
2
3
OFF
OFF

13
The fuel is a mixture of gasoline and 2-cycle oil. Use a 25:1 ratio gasoline to oil. Gasoline should be
92-98 Octane RON in Europe and 87-93 Octane AKI in the US.
Fuel Preparation SECTION C
• Always observe all warnings and precautionary
statements on fuel.
• Fuel is a fire accelerant. Never operate your
vehicle near open flames. Never smoke while
operating your vehicle or while handling fuel.
• Always only use a mixture of gasoline and two-
cycle oil for fuel. Do not use glow (nitro) fuel.
• Always use caution when handling gasoline.
• Always run your model engine in a well-
ventilated area. Model engines produce
harmful carbon monoxide fumes.
Mixing The Fuel
Fuel Requirements
Basic Fuel Warnings And Guidelines
Gasoline2-Cycle Engine oil
125

14
• Always observe all warnings and precautionary
statements and instructions supplied by the
fuel .
• Only use gasoline mixed with two-cycle engine
oil.
• Always use 92-98 Octane R(Europe)and 87-93
Octane AKI(US)gasoline.
• Always mix fuel in a sealable, water-resistant
container specifically made for gasoline.
• Always drain your engine after you have
finished running your vehicle.Do not store the
vehicle with fuel in the gas tank.
• Never handle model engines and mufflers
until they have had time to cool.They become
extremely hot when in use.
• Always store your fuel in a safe place well
away from sparks,heat or anything that can
ignite.
• Always ensure that gasoline and fuel are
stored in a clearly marked container well away
from the reach of children.
• Always store your fuel safely in a sealed,water-
resistant container specifically made for
gasoline.
• Always store fuel in a cool,dry location.Do not
allow fuel containers to come in direct contact
with concrete,as the fuel may absorb moisture.
• Always responsibly discard fuel if there is
condensation and/or water inside the fuel
container.
• Never allow fuel to come into contact with eyes
or mouth. Gasoline and other fuels used in
model engines are poisous.
• Never return unused fuel from the fuel tank
back into the fuel container.
Fuel Mixing Precautions And Guidelines
Fuel Storage Precautions And Guidelines
Fuel Preparation SECTION C

15
Vehicle Starting And Running SECTI D
Fueling The Vehicle
Turning The System
Remove the fuel tank cap and fill the fuel tank. Tighten the fuel tank cap securely back in place.
Please note that the body does not have to be removed to fuel the vehicle.
Turn the transmitter first,then turn on the receiver.
Notice
Do not tilt the vehicle even when the Fuel
Tank Cap is back in place as gasoline may
leak from the vent hole in the cap.
1
2 3
ON
ON

16
Priming The Engine
Engine
Notice:
Make sure you understand all engine
instructions before attempting to start the
engine.
Failure to follow all instructions can lead to
damage to your vehicle, property damage
and bodily injury.
Please press
red button if you
need to stop
engine.
If there is a problem with the engine, press
the engine stop switch to shut off the engine.
The engine must be primed before it can be
successfully started. Push the primer bulb
(pictured) until you can see fuel in the yellow
return tube (also pictured).
Vehicle Starting And Running SECTION D

17
Cold Engine
Hot Engine
Only use the choke if the engine does not start normally. Using the choke can easily flood the
engine with fuel.
1. Set choke lever as shown in Step 1.
2. Pull start cord in a quick continuous
motion(about 3 times)until you hear the
engine almost start,then stop.
3. Be careful not to flood the engine with fuel.
Do not pull more than 50 cm/20 in or you
can damage the pull start assembly.
4. Set the choke lever as shown in Step 3.
5. Pull the starter cord start the engine.
6. The engine should start within 6 pulls.
1. Set the choke lever as shown in Step 1.
2. Pull the starter cord in a quick continuous
motion to start the engine.The engine
should start within 6 pulls.
Vehicle Starting And Running SECTION D
1
1
2
2 3 4
Almost Starting
Starting Procedure

18
Breaking In The Engine
Stopping The Engine
Turning The System Off
Break in the engine by driving slowly for the
first half tank of fuel (about 25 minutes).
Push engine stop switch to shut off engine.
Turn off the receiver first,then turn off the
transmitter.
Notice:
Do not adjust carburetor settings during
break-in .Doing so will cause engine
damage.
Notice:
Do not touch the engine and muffler as they
can become extremely hot during use.
Notice:
Never powe off the transmitter or receiver
before stopping the engine.You will lose
control of your vehicle.
Vehicle Starting And Running SECTION D

19
High-Speed Needle (on the left
side)
Close the high-speed needle
turning it clockwise until it stops.
Then turn it counterclockwise 11/2
turns out(open).
Low-Speed Needle(on the right
side)
Close the low-speed turning it
clockwise until it stops. Then turn
it counterclockwise 11/4 turns
out(open).
Tuning Reference SECTION E
Engine Tuning
Introduction To Engine Tuning
Factory Carburetor Settings
The engine can be further tuned from the
factory settings to optimize performance
under various conditions, if you lose track of
the engine settings, please revert back to the
factory carburetor settings (see next page)
before making adjustments: Please make
sure that the small vent in the Fuel Tank Cap
is open and air filter is clean, as it will affect
engine performance and tuning. The carburetor
needle is very sensitive. Adjusting the needle
even 1/16 of a turn is a significant change. Be
careful when making adjustments.

20
RPM
Lower
RPM
Higher
Adjusting The High-Speed Needle
Adjusting The Low-Speed Needle
Idle Adjustment
Notice:
When making adjustments,only turn the
needle 1/16 turn at a time.Never exceed
1/4 turn in (11/4 turn out from closed)or the
engine will be damaged.
Notice:
When making adjustments,only turn the
needle 1/16 turn at a time. Never exceed 1/4
turn in (1 turn out from closed)or the engine
will de damaged.
If the speed is slow, turn in the high-speed needle 1/16 turn and test Do not exceed 1/4 turn in from
factory setting (minimum 11/4 turn out from closed)or the engine will be damaged.
If the vehicle accelerates slowly,turn in the low-speed needle 1/6 turn and test.Do not exceed 1/4
turn in from factory setting (minimum 1 turn out from closed) or the engine will be damaged.
If the idle is set too high(vehicle moves
at idle) or too low(engine does not stay
running). Adjust the idle speed on the
carburetor.
Tuning Reference SECTION E