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Steve's CH750 Cruzer (N750SB)
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Date:  8-3-2018
Number of Hours:  4.75
Manual Reference:  
Brief Description:  Upgraded gearbox vent system

I installed the upgraded gearbox vent system. Started by draining the gearbox of oil and removing existing hoses and fittings. I removed the reservoir, drained, and cleaned it. It is not needed for the new system, so I'm switching it to be the coolant tank. I was never happy with the coolant reservoir being so low, even though according to Viking, it should be ok.

The mounting for the vent tank is pretty straightforward. The mounting tab reuses one of the gearbox cap screws. A second, shorter cap screw goes through the tab and into one of the unused half-depth holes. The only real issue I found is the connectors for the middle hose are offset enough that a straight line hose connection is impossible. I had to angle them so the hose would bend and not kink. Filled the system with 12oz of fresh gear oil.

Removed the large coolant reservoir and re-routed the tube to the smaller reservoir on top.
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New vent system

New vent system

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Converted gearbox reservoir to coolant

Converted gearbox reservoir to coolant

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