320 gear pump failed.

[Chris Zavatson]

One guess is that the gear section seized which then broke the coupling. If you pull the motor off you’ll be able to check that.

Yours is one of the earliest pumps. Those motors of that vintage have been failing from either worn bearings or shorted windings. The casting for the adapter did not yet have the tabs for top mounted reservoirs. It will also not have the LB back pressure relief circuit.

The smaller metal reservoir can be transferred to new pumps as long as the gear section was drilled for the mounting screw.

[admin]

Paul N needs a pump with the LB circuit IMO. The early pumps did not have this circuit which allows for double acting work to be done. This missing circuit was probably not recognized early by the development team and we still see other landing gear on non-Lancair models coming hear for help. Chris Z, is this your view also? Replace the pump?

[Paul Nafziger]

Everything turns freely. Can't see any damage. Who would you recommend I buy a new pump from and what model?

[John Cooper]

As others have said, do NOT attempt to by a new pump from Oildyne. They won't sell to Lancair owners, and actually have a list of them. Pricks.

[Chris Zavatson]

Paul N.
Next on the hit list: broken pressure relief valve or broken gear pump section.
New pumps are available here for $850. (Need to add a blurb in the owner supplied parts section). This would be the latest configuration with the LB circuit, the newer pump, larger reservoir etc. (the old reservoir can be reused)

[Paul Nafziger]

Chris Z
Can I ship it to you to have it checked out?

[Chris Zavatson]

Chris Z
Can I ship it to you to have it checked out?

Send it. will PM address

[Paul Nafziger]

Will do. Need to remember to post the findings for the viewers edification.