If you have a Baron or Travel Air with fuel
injected TCM engines, it's likely that you have a 24V-28V pump manufactured by
Bonanzas are also fitted with 12V Dukes electric fuel pumps and the earlier ones
may use a Weldon pump.
Here's a Dukes 4140 Boost Pump
Here's their contact info if your pump ever
needs servicing or overhaul:
9060 Winnetka Avenue
Northridge CA 91324-3235
A Beech Lister reports an overhaul ran him
about $500 a few years ago and his pump was returned within a few days. We are
now hearing price quotes for overhauls of nearly $1,000 for these pumps! Heaven
HERE is a pdf from
RAPCO on their pump overhaul
NEWS FLASH 10/28/2012:
Dukes has appointed Quality
Aircraft Accessories (QAA) the exclusive rebuilder/overhauler of their pumps.
This has skyrocketed the price for overhaul and exchanges of these pumps to
something reported on the order of $1,000 overhaul and about $1,400 exchange!
See the Press release on this very sad news for us owners
Do NOT DESPAIR! As of this
writing enterprising Bonanza owner Spike C., has identified a viable alternative
to what amounts (in my opinion) to predatory pricing on this key Beechcraft
Here is Spike's pirep on his
"I just stumbled across this; they have an ad in Trade-a-Plane, but it is not
high profile. From there, I came across (some kind of search I did) a price
list, showing the $400.00, and I assumed it was outdated, because the pricing is
much like that you'd routinely find from others just a couple of years ago.
When I called Bob, he confirmed the pricing and assured me that, because his
overhaul procedure is one they developed and secured approval for independent of
Dukes, the price was assured. Aeromotors is a Repair Station, and they work on a
lot of big, grown-up airplane bits.
Also, should add that, when I encountered a self-induced installation
obstacle (and no, I will not say what it was, just that it was silly and
embarrassing for one who foolishly believes himself to be mechanically
competent), Bob was readily available on the phone to clear up my confusion.
Based upon the quick service and fair pricing, I intend to tout Aeromotors,
and hope that their shadow may only increase."
Here is the Aeromotors info:
Aeromotors LLC has an approved alternate procedure and their own parts for
See their website and Dukes
HERE scroll down to see the Dukes PNs
304 E. Murray Street
Browntown, WI 53522
On 3/25/2013 I spoke with Bob
at Aeromotors and he confirmed at that time the 4140 Series Dukes pump repairs
were indeed $400. However, the 4150 Series on the Baron (with the second stage
solenoid) are $650.
Here is a pirep from Bonanza
owner, Paul S. of NY:
A recent experience with Aeromotors for the same pump in a C206 was
frustrating, at first.
They do not take credit cards or wire transfers.
Sending the old pump with a personal check was OK, but next day delivery is
NOT even available to them.
The rub began when the "serviced" pump did not meet spec upon installation.
They required full payment to send another unit.
(did I mention no next day service or electronic banking?)
In the end though, more time than desired to accomplish, Bob Bohn got on the
phone to troubleshoot the Cessna installation, flow settings with resistors,
End result being we know more than we ever wanted about how the pump was
designed and that in the Cessna installation, the Aeromotors pumps acts a bit
Highly knowledgeable with quality work.
Good to have choices.
Stay tuned to this page for
possible reports of a Weldon Pump PMA'd alternative. Weldon pump pricing seems
to remain a low cost alternative to the now VERY COSTLY Dukes pumps used
as OEM in many of our Beechcraft.
Here is a picture of the 4150 Series Boost
Pump in my B55
A note about boost pump removal in the wing -
USE JACKS & TAIL WEIGHT to support the airplane while you open the inner gear
doors with your manual crank (clockwise). This will allow you the access needed
to effortlessly work to remove the pump. I suggest you not even think about
cranking open the gear doors with the WOW (weight on wheels) since the nose
linkage will likely come off "over center" lock and you risk a nose collapse or
worse with you or your mechanic under the plane!
Here is an old pirep on Dukes service from
Beech Lister Mike T. (before the "exclusive rebuilder selection". How things
have changed for the worse for us users of the Dukes product ! :
A boost pump on my Baron failed late Wednesday afternoon.
Someone on the list suggested I call Dukes. I did and reached a cheerful and
competent woman who explained Dukes could overhaul my pump for $550 (with a
five-day turnaround) or I could go the OH route for $600. I took the second
option, and the replacement pump was shipped the next morning. It couldn't have
been any easier.
(Surprisingly, Dukes' prices were less than the few
independent shops I had checked, although in this particular instance I wasn't
squeezing my pennies very hard; the aircraft wasn't flyable.) Highly
recommended, as the movie reviewers say.
Here are some service bulletin documents and
overhaul kit numbers. Note the requirement to convert your older pump to
nylatron vanes. Click for full size images:
Weldon Fuel Pumps
(fitted to some Bonanza Models)
Repair Source Pirep
RLB Accessory Service
971 N. Babbitt Ave
Addison, IL 60101
Here are some pics of the
Weldon pump and it's installation in
The angled fittings have not been removed. After they are off,
the pump can be moved aft and up and out. Note the fuel pump is located on the
outboard side of the fuel selector assembly, not underneath.
Weldon Authorized Repair Facilities
Another Beech List pirep from Beechcraft Owner, Mike T.
suggests for Weldon, to check out
CJ Aviation, a shop in
south Florida. "I bought a Weldon
pump from them years ago and was happy with the transaction."
Osborne Tip Tank Fuel Pump Pirep
Per anonymous Beech List contributors on 1/13/2017:
"I had one of my pumps fail to
pump a couple of years ago and after landing I got it working again by slapping
the wing pretty hard where the pump is mounted.
After I got home I did some
trouble shooting and discovered it had quit working again. These pumps are
standard automotive pumps made by
Facet, the older ones had points to make them
pulse and pump, the current ones have an electronic pulse device that is much
more reliable. If you remove the pump from your Osborne tip tank installation, you will find that the Facet
has been removed from the mounting tab and replaced with a sticker from Osborne.
The Facet PN for the older pump is 40131 and it is no longer
being manufactured. The replacement pump with the electronic pulse device is #40131E.
It is reported that this particular pump has an anti-siphon feature to prevent
siphoning from the tips into the mains when the pump is turned off.
me how I know this but it is available from any auto parts store like
THIS for about $82. Use your own judgment with your mechanic on replacement.
Also, any time you plan to use
tip tank fuel, as part of your pre flight you turn the pumps on briefly to be
sure they are working. You can hear them clicking from the cockpit if the engine
is not running. Do not run them more than a few seconds or you will pump fuel
out of the main tank vents.
Click HERE for
info on the Facet fuel pump filter which lives under the twist-on base and be
sure to service it regularly so as to be sure no water is allowed to collect in
the cap which will for sure corrode it from the inside!"