Lanair MX 75, Installation & Operation Manual

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6.3.5 Oil Filter Cleaning
How often?
As needed. The in-tank oil strainer is protected by the strainer basket in the fill port, so it should
rarely need to be cleaned. Clogging is indicated when the pump vacuum increases to over 5
inches Hg.
Tools Required:
5/8” and 3/4” open end wrenches, pipe wrench, parts washer fluid, rags, safety
glasses, rubber gloves.
Personally verify that the power is off and locked out at the circuit breaker.
Procedure:
1. To remove the Fill Port Strainer, simply remove the screws holding it in the tank and pull it up.
2. Clean and reinstall. NOTE: One gasket goes above, and one goes below, the strainer basket flange.
3. To remove the Top Suction Assembly, first disconnect the three float switch wires. Note colors.
4. Use the 5/8” and 3/4” wrenches to disconnect the flare fitting at the inlet to the pump.
5. Remove the 2” bushing from the tank with a pipe wrench. The copper tubing should rotate in the
compression fitting as the bushing turns. If not, loosen the compression fitting.
6. Carefully lift the assembly out of the tank, taking care not to damage the float switch. Note the tubing will
be full of oil.
7. Clean the strainer and reinstall the assembly. NOTE: There should be several extra inches of float
switch cable inside the tank. This will wrap around the tubing as the bushing is turned. The strainer
should be rotated so it is at the back of the tank, prior to reattaching the flare fitting to the pump.
8. Re-prime the system as shown in Sect. 5.4.
Top Suction
Assembly
Fill Port
Strainer
Low Fuel
Float Switch
In-Tank
Strainer
Check Valve
Flare Fitting
Compression
Fitting –
Leave Loose