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g) Checking alignment and tooth backlash of drive
The engine transmits its power via the pinion on the clutch bell to the main pinion at the centre differential. Both rotary axes, i.e. the crank shaft, engine side, and
the axis of the drive section to the front and rear axle must be exactly parallel to each other. This prevents twisting in the drive section, premature wear of the
pinions and bearings and loss of performance.
The parallel alignment of crankshaft and drive section has to be checked every time before using the vehicle and, if necessary, has to be readjusted!
When the alignment is parallel, the pinion on the clutch bell and the main pinion will run smoothly. If there is too much play, the pinions will be destroyed over
time. Too little play will destroy the bearings in the clutch and the engine.
Checking the tooth backlash
• Put a thin paper slip between the pinion on the clutch bell and the main pinion in
the drive section.
• Turn the pinions manually.
• The paper strip must not tear when the pinions turn!
Readjusting the tooth backlash
• Loosen four motor attachment screws of the engine on the underside of the chassis.
• Align the engine sideways and fasten the screws again tightly.
• Unscrew four screws at the top of the engine support and align the motor vertically.
h) Operating the RC system
Please note the individual operating instructions of your remote control!
The operation of the transmitter is possible with rechargeable batteries or normal batteries. When you use rechargeable batteries, make sure they are high-
capacity batteries to ensure long battery life. If you use normal batteries in the remote control, we recommend the use of high-quality alkaline batteries. Use a
battery tester to check if the batteries still have enough power.
If the batteries are empty, always replace the complete set (never just individual cells!). Always use batteries or rechargeable batteries of the same type and
manufacturer. Never mix normal batteries and rechargeable batteries.
The model is equipped with powerful servos according to maximum speed and vehicle weight. We thus advise against operation using 4 AA batteries/rechargeable
batteries to power the receiver.
CAUTION!
To operate the receiver, use a full-load 5-cell battery pack (Hump battery pack) with an operating voltage of 6 V.
• Insert the 8 AA batteries (rechargeable batteries) into the battery compartment of the receiver. Observe the polarity!
• Open the RC box of the chassis.
• Connect the 6 V receiver battery (Hump battery pack) to the switch cable.
• Observe the correct polarity and a tight fit.
• Insert the Hump battery pack including the cables and the plug into the RC box again.
• Carefully connect the two plugs.
• Carefully remove the receiver from the RC box and unroll the aerial wire.
• Install the aerial wire to the outside through the opening in the cover of the RC box.
• Thread the aerial of the receiver through the aerial guide tube.
• Stick the lower end of the aerial guide tube into the recess on the cover of the RC box.
• Secure the aerial tube in the aerial support.
• Secure the aerial wire at the top of the guide tube using the tube rubber cap.
Never shorten the aerial wire!
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