Hobbies & Helis Octane Dominator 20, Instruction Manual

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Page 59 of 105
4-2 MAIN GEAR INSTALLATION
No. Bag# Description Qty No. Bag# Description Qty
1 Step 4-1 Main Gear Assembly 1 5 HB M3x30 Cap Head Bolt 1
2 Step 3 Assembly up to step 3 1 6 HB M3 Locknut 1
3 4 Main Shaft 1 7 HB M3X5 Set Screw 8
4 4 Main Shaft Collar 2
• Bring the Main Gear Assembly in; slide the Main Shaft down through Upper Bearing
Block, Main Shaft Collar (make sure the ridge is toward the Upper Bearing Block), and Lower Bearing
Block, then secure with one M3x30 Cap Head Bolt and one M3 Locknut. Bring the Main Shaft Collar
up until it touches the Upper Bearing Block then secure it with four M3x5 Set Screws.
• Install the other Main Shaft Collar on the Main Shaft then secure with four M3x5 Set
Screws. Be sure the ridge goes down and touches the Upper Bearing Block.
• Check static balancing of the main shaft to make sure it is balanced well.
• You may have to sand down the holes for the Clutch Bearing Block a little for proper
lining between the Main Gear and Pinion Gear.
• Adjust the Tail Transmission and Start Shaft Bearing Block to get proper gear matches.
Trick: fold a piece of tablet paper of 20x100mm (1x4 inch) along a long side and then insert it
between the gears. Bring the gears together. Tighten the screws on the Tail Transmission/Start Shaft
Bearing Block up and take the piece of paper off.
QD308
HHI3M30C
HHI3MFLN
Tighten these set screws evenly
so the collar is centered on the
shaft