Fuel Harvester Setup?

[ChubbyPitbull (OP)]

Hello! I've been trying to get Fuel Harvesters working in v1.9.3 and just can't seem to get them to dump fuel using normal Standing/Conditional orders. I've gotten them to move to a gas giant containing sorium, but since I create them at game start using Ship Build points, they started with full fuel tanks. So they end up just heading right back to Earth to drop fuel, but never actually drop fuel. Earth both has a Spaceport and shows "Refuelling Capability: Yes" in the Economics Summary tab.

Here is the Fuel Harvester ship design in case I missed something:

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Mietitrice class Fuel Harvester      52,997 tons       330 Crew       1,403.4 BP       TCS 1,060    TH 2,344    EM 0
2211 km/s      Armour 1-125       Shields 0-0       HTK 178      Sensors 1/1/0/0      DCR 1      PPV 0
MSP 16    Max Repair 39.0625 MSP
Tenente di Vascello    Control Rating 1   BRG   
Intended Deployment Time: 60 months   
Fuel Harvester: 12 modules producing 480,000 litres per annum

Fincantieri Commercial Ion Drive  EP156.25 (15)    Power 2343.8    Fuel Use 8.94%    Signature 156.25    Explosion 5%
Fuel Capacity 760,000 Litres    Range 28.9 billion km (151 days at full power)
Refuelling Capability: 50,000 litres per hour     Complete Refuel 15 hours

Selenia TH-1 Emergency Thermal Array (1)     Sensitivity 1     Detect Sig Strength 1000:  7.9m km
Selenia EM-1 Emergency Electromagnetic Array (1)     Sensitivity 1     Detect Sig Strength 1000:  7.9m km

This design is classed as a Commercial Vessel for maintenance purposes

For conditional orders, I've tried "When Fuel Tanks Full -> Harvester Transfer and Return" and "When Fuel Tanks Full -> Transfer Fuel to Colony" but neither work. I also thought I could try manually transferring fuel from the ship to Earth, but I couldn't find where in the UI to do that. What am I missing?

[ChubbyPitbull (OP)]

Well, I'll save everyone the trouble. Make sure your Fuel Harvesters are flagged as "Tankers."

[Father Tim]

Well, I'll save everyone the trouble. Make sure your Fuel Harvesters are flagged as "Tankers."

Yup.  This will cause them to only load 10% fuel at construction.

Also go into their miscellaneous tab and set a minimum fuel amount (this number is in litres) to unload to, in case you use orders other than "unload 90% fuel at colony" at some point.

Also please note that fleet "refuel at XX%" conditional orders ignore ships with only refuelling equipment, and only target Refueling Hubs and Spaceports.