Hobbies & Helis Gas-Her, Instruction Manual

Page: 52 / 104

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.
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