Lanair HI140 - Manual (Page 55)

Yes
No
Replace pump motor. Check for loose wire connections.
Is there an air leak in the suction
line or pick-up tube? An air leak can be
Yes Tighten and reseal all pipe
seen when bleeding the pump. fittings on the suction side
When no air is present you will have a of the bleeder. Use flare
steady stream of oil through the pump. fittings only.
No
Check all lines to pump, as well
Clean or replace strainers.
as pick up strainer, and primary strainer. Yes Check for air leaks.
Are they plugged or dirty? Prime pump (sec. 14).
No
Replace fuel pump.
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