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Making a Bennett 966 to visually work
#633011 Mon Oct 12 2015 05:25 PM
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I've been working on a design to have the Bennett 966 pump I'm restoring to visually work as it did when in service. Here is the progress as of today.

The lights will be activated via the push/pull handle on the side cover. I'll use LED bulbs so the power draw will be minimal. All wiring and porcelain sockets were replaced and wiring is routed through the rigid conduit that was original to the pump.

To enable the pump dials to spin when the nozzle handle is depressed I've added a few components. These include a small AC motor, an AC/DC power supply, an Omron 12VDC relay and a small momentary switch.

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Re: Making a Bennett 966 to visually work
ed1966ss #633012 Mon Oct 12 2015 05:26 PM
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The power supply, relay and switch all reside in a 6x6x4 electrical enclosure mounted slightly below the pumps computer.

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Re: Making a Bennett 966 to visually work
ed1966ss #633013 Mon Oct 12 2015 05:27 PM
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The drive motor is mounted under the computer on a mounting plate I cut from .125 inch aluminum sheet. This mounting plate is attached to the pump's computer via 3 existing threaded holes in its base. In discussing this design with a friend he suggested that he had the perfect motor to drive the computer. It's a Bodine 60 RPM gear reduction AC motor. It's probably overkill for this use, but the price was right(free).

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Re: Making a Bennett 966 to visually work
ed1966ss #633014 Mon Oct 12 2015 05:29 PM
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We machined a small connector piece that attaches to the motors shaft and fits into the computers drive connection.

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Re: Making a Bennett 966 to visually work
ed1966ss #633015 Mon Oct 12 2015 05:30 PM
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Fabricating a switch into the nozzle's handle proved to be the most challenging task. I decided to use a low voltage solution to perform this function, thus the above mentioned AC/DC transformer/rectifier. In the event of a short circuit, the low voltage DC current would not be life threatening if the switch fails.

Removing the nozzle from the pump body and raising the activation handle will mechanically close a momentary switch using the pumps existing control linkage and a small adjustable linkage I've added for the last movement to push close the momentary switch.

This monetary switch when held compressed will then energize the AC/DC power supply. One leg of the power supply's 12VDC output will be routed through the pumps gasoline supply piping, through the visual plumbing, out the hose and into the nozzle.

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Last edited by ed1966ss; Mon Oct 12 2015 05:32 PM.
Re: Making a Bennett 966 to visually work
ed1966ss #633017 Mon Oct 12 2015 05:35 PM
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The design is to place a switch into the nozzle so when the handle is compressed it would complete the circuit and energize the Omron relay. The relays' NO(Normal Open) contacts will then close which would in turn energize the AC motor and begin to drive the pump's computer dials.

After considering several options I've decided to fabricate a switch using a combination of the nozzles original parts and a couple other parts selected for the task. To limit the nozzle handle's travel I've installed a small tube over the handle's plunger. This prevents the internal valve body from opening completely and prevents it from pinching the low voltage wires. The low voltage circuit travels through the nozzle body to a contact mounted in a nylon rod machined to fit into the nozzles cap. I've also swapped out the original spring for a smaller diameter and weaker one. It's kind of difficult to explain but hopefully the following pictures will clarify the text.

This pic shows the small tube fitted to the nozzle's handle shaft to limit it's travel.

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Last edited by ed1966ss; Mon Oct 12 2015 05:57 PM.
Re: Making a Bennett 966 to visually work
ed1966ss #633018 Mon Oct 12 2015 05:36 PM
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With the handle depressed the nozzle valve stops short of pinching the low voltage wire headed to the upper contact.

This existing valve body functions as the lower contact so when the handle is compressed contact is made to complete the low voltage circuit and activate the pumps motor.

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Last edited by ed1966ss; Mon Oct 12 2015 06:03 PM.
Re: Making a Bennett 966 to visually work
ed1966ss #633020 Mon Oct 12 2015 05:39 PM
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A nylon rod was machined to fit into the nozzle's cap and insulates one end of the circuit. I made several trial fits to determine the correct size to fit well into the nozzle then cut the nylon rod to size and somewhat rounded the end to fit into the cap.

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Last edited by ed1966ss; Mon Oct 12 2015 05:59 PM.
Re: Making a Bennett 966 to visually work
ed1966ss #633021 Mon Oct 12 2015 05:40 PM
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The wire enters from the side of the spring and enters from the top through a hole drilled through the center of the nylon insulator. The wire end gets bent around to create a contact point.

When installing the nozzle cap with the wire for the upper contact I found it easiest to wrap the wire counter clockwise around the spring 6-8 times and then as you screw on the cap you unwind the wire by pulling it out the nozzle hose end. Then once the cap is secured the wire should be headed out the nozzle hose end and not be wound around the spring to impede the nozzle handle operation.

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Last edited by ed1966ss; Mon Oct 12 2015 05:55 PM.
Re: Making a Bennett 966 to visually work
ed1966ss #633022 Mon Oct 12 2015 05:41 PM
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The other nozzle circuit wire is soldered to a small utility clamp which has the coating removed and gets inserted into the nozzle body, hose end so it creates contact with the nozzle body to complete the circuit.

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Re: Making a Bennett 966 to visually work
ed1966ss #633024 Mon Oct 12 2015 05:47 PM
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I've run all the wiring through existing conduit, or in the case of the nozzle switch, through the pumps gasoline supply route and out the hose to the nozzle. I was fortunate that the Bennett I acquired was basically complete so all the internal components were there.

I'll attach a wiring diagram shortly.

Thanks to Tom Buckles for supplying some needed parts and to Joe Maulsby for sharing some photo's and taking time to speak with me.

Re: Making a Bennett 966 to visually work
ed1966ss #633026 Mon Oct 12 2015 05:54 PM
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Here is the wiring diagram:

Gas Pump Model (2).jpg
Re: Making a Bennett 966 to visually work
ed1966ss #633065 Mon Oct 12 2015 11:37 PM
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As a guy who is 80 years old and still have projects to finish, you have too much time on your hands. I wish I had the hours you spent to help me on writing my gas pump book.

Just messing with you, great idea.

Jack Sim


Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at www.gaspumpbible.com
Air Meter ID book also available
Re: Making a Bennett 966 to visually work
Jack Sim #633072 Tue Oct 13 2015 04:24 AM
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Originally Posted By Jack Sim
As a guy who is 80 years old and still have projects to finish, you have too much time on your hands. I wish I had the hours you spent to help me on writing my gas pump book.

Just messing with you, great idea.

Jack Sim


No offense taken Jack. I also have many projects to finish, but since this was my first gas pump restoration sometimes you need to step back and work on things that you really enjoy, versus what you should be doing.:)

Re: Making a Bennett 966 to visually work
ed1966ss #633076 Tue Oct 13 2015 06:10 AM
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I sell a kit that removes a lot of the work you went thru to accomplish this. Its an all inclusive kit that contains all the screws , mountings, and couplings needed to attach to any veeder root ever manufactured. It takes approximately 15 minutes to install without the wiring, and sells for $150 plus shipping , with all new parts.
I have left the wiring part up to the individual pump owners because there is such a diversity of manners in which to activate the drive system, depending on the pump being used.
Your nozzle switch is another good one in a long list of methods available. Several members have used a 12 volt voltage reducer to minimize the danger in the switch mechanism by using 12 volts for that part of the system. Others simply activate the system by using the nozzle rest linkage to activate an on/off switch. There are many ways to activate the drive mechanism, and yours is another welcome addition.

Motorized computer 006.JPGMotorized computer 003.JPGMotorized computer 004.JPGMotorized computer 007.JPG

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