Lanair MX300 - Manual (Page 20)

Section 6 - Fuel Supply Pump/Piping
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General Requirements
1. Mount the fuel supply pump in a horizontal position (shaft horizontal) near the fuel sup-
ply tank.
2. The oil pump has a maximum suction lift of 14 feet. Suction lift is the length of pipe run
from the bottom of the pick-up strainer to the fuel supply pump.
3. The fuel pump/motor are intended for indoor use only.
4. The fuel pump contains an internal strainer that periodically needs to be cleaned. This
internal strainer is mounted behind the pump cover. Before removing the pump cover
make sure you have a new gasket on hand. Contact the Lanair Customer Service
Department for the proper gasket for your model of pump, at 1-888-370-6531.
5. Install the suction supply line from the inlet side of the fuel pump into the fuel tank
opposite the drain.
6. Install a 1/2” inside diameter (.493) steel pipe, or 1/2” outside diameter copper through-
out the suction supply line and pick up tube. The use of smaller line, or rubber, plastic or
hydraulic line is unsafe and will void your warranty.
7. Use thread sealing compound on all pipe thread connections. Do Not Use Teflon Tape.
8. Install the suction line strainer in the suction line. Make sure the suction line strainer is 6”
off the bottom of the tank. The suction line strainer may be mounted horizontally or ver-
tically. Consider accessibility.
9. Install a 1/2” NPT pipe union between the suction line strainer and the pick up tube to
allow for service on the pick up tube.
10. Install the check valve (arrow facing towards the pump) on the bottom of the pick up
tube.
11. Install a vacuum gauge in the suction line. This gauge will indicate when service is need-
ed on the strainer, pump or connections.
12. When using a by-pass regulator install a 1/2” inside diameter (.493) steel pipe, or 1/2”
outside diameter copper from the fuel by-pass regulator (port marked “T”) to the fuel
supply tank. Do not allow this line to protrude into the tank more than 1”. The use of
smaller line, or rubber, plastic or hydraulic line is unsafe and will void your
warranty.
When using the optional Metering Pump install a 3/8” copper line from the tee on the
metering pump assembly to the fuel supply tank do not allow this line to protrude
below the level of the oil. The use of smaller line, or rubber, plastic or hydraulic line is
unsafe and will void your warranty.
13. Do not allow the fuel level in the tank to cover the return line.