As standard the Monstertruck is delivered with the slower gear ratio. Optionally the faster transmission for
higher top speed can be installed. In addition the main gear and the motor pinion must be changed. Therefore
you have to loose the M4 nut on the main gear with a 7mm nut driver and the set screw in the pinion with a
1.5mm Allen key (fi g. 1).
Pull now the main gear wheel of the shaft. Pay attention to the pin 90165,43, so that it does not fall out. Next
you take the engine pinion off. Now you can install the faster transmission. Put fi rst the main gear wheel (82
teeth) onto the shaft - attention to the correct seat of the pin on the shaft and in the recess of the main gear -
and screw the M4 nut again fi rmly. Finally install the larger pinion with 26 teeth on the motor shaft and, tighten
the M3 set-screw. Make sure to install the motor pinion in such a way that the two gears lock concisely (see
fi g. 2).
M4 Lock nut
M3 Set screw
Problem
Possible errors
To do
Motor does not run
Broken motor wiring
Resolder wiring
HILTI-Battery empty
Change or charge battery
Remote control does not function
correctly
Check Remote control
Motor not working
Change motor
No motor performance
HILTI-Battery almost empty
Change or charge battery
Speed control not adjusted properly
Switch the car off and on againt, the-
reby don't move the throttle trigger
Drivetrain runs heavily
Check drivetrain
Drivetrain works loud
Check gear mesh
The car is diffi cult to steer
Transmitter batteries empty
Change or charge batteries
Steering servo trim not adjusted
properly
Trim steering servo
Interferences
Make a short break an then try again
or change crystals
TROUBLESHOOTING
Fig. 1
Fig. 2
Don't drive in wet grass or puddles, because the electronic equipment (servo, receiver and speed controller)
is not waterproof. If you want to drive in the wet, these parts must be protected waterproof (e.g. by a bal-
lon).
90165.RTR Hilti Monster Truck 4WD 10
