Troubleshooting - GRAUPNER Hilti Monster Truck 4WD Instruction Manual

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).
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).
Fig. 1

TROUBLESHOOTING

Problem
Motor does not run
No motor performance
The car is diffi cult to steer
90165.RTR Hilti Monster Truck 4WD
M4 Lock nut
M3 Set screw
Possible errors
Broken motor wiring
HILTI-Battery empty
Remote control does not function
correctly
Motor not working
HILTI-Battery almost empty
Speed control not adjusted properly
Drivetrain runs heavily
Drivetrain works loud
Transmitter batteries empty
Steering servo trim not adjusted
properly
Interferences
Fig. 2
To do
Resolder wiring
Change or charge battery
Check Remote control
Change motor
Change or charge battery
Switch the car off and on againt, the-
reby don't move the throttle trigger
Check drivetrain
Check gear mesh
Change or charge batteries
Trim steering servo
Make a short break an then try again
or change crystals
10