Dual AC pumps

Dual AC pumps

Postby Ironsides [OP] » February 21st 2017, 11:48pm

Dual AC pumps, in case you didn't know...

Rube Goldberg inspired them, front pump looks similar to power steering pump made from a rusty iron bagpipe and wooden bucket. Located forward of engine cooling fan, riding single spindle and bearing, powered by windmill vanes (or optional small rodent when engine off), the pump howls like a bagpipe and leaks like a sieve however manages to deliver Freon via drinking straws held loosely together with band aids supplying the front evaporator which ran conventionally with blower fan, ducting and directional vents through the dash.
Rear pump being a little more complicated, pulls it's power from rear driveshaft via a bicycle tucked above the rear axle hanging from waistband suspenders stapled to both the muffler and gas tank. Power is applied through the little headlight generator wheel pressed against the driveshaft, turning the front wheel encased in sausage skin which is stretched over the front tire twisted in the center for snug fit then around rear tire so they turn together, which then turns the chain which turns the pedals. The pedals "kick at" if you will, a 20 gallon, jello filled, glove shaped bladder that is located where you find the spare now, each kick pushes the bladder "fingers" bunched and tied together holding an ordinary toilet plunger that extends into the Freon bucket hanging from the driver side rear leaf spring. It was located at the rear spring because it was believed that on bumpy roads the driver sweated more and the pump actually performed better in the bumps due to longer plunger travel. The rear bucket also has straws held loosely together with band aids that supply the rear evaporator which runs conventionally with blower fan, ducting and directional vents. None of the Freon was returned to a condenser it just pumped freely out of vents and ran down floorboards and returned to supply buckets via gutters and downspouts, thus forcing driver and passengers to open the windows, letting cool air into vehicle and viola, it worked!
There was no spare tire back then, if you received a flat tire, you had to remove the rear AC pump drive train aka spare bicycle and ride to your destination. Most people just threw it in the back once removed and relied on the front AC pump only, that is until the wind vanes fell apart and then you were just driving around hot with the bagpipe howl. The original accessory power supply consisting of 1 small rodent, 1/2 lb sunflower seeds, cage, running wheel and water bottle was difficult to buy aftermarket because replacements didn't come on a spindle directly driving the front pump, they wanted the mechanic to work out another bladder system, the rodents didn't supply enough power and often ate the sausage belts driving the bicycle wheels... this required additional vehicle height and length so, GM created the single compressor with additional rear lines.
The Dual AC pumps are why these vans have had different suspensions and no longer sport their long noses.
Only five were ever made, it was believed that none survived this long... until today.
GM no longer uses staples.
DualACPumpsAD.jpg
Original Poster [OP]
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Ironsides
Firing on 2 Cylinders (L1)
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Van Model Year: 2001
Van Make/Model: GMC Safari
Extra Info: RWD Custom HD

Re: Dual AC pumps

Postby Lumpy » February 22nd 2017, 1:43am

Thanks for the great explanation... :banana:

Who sells the best kit?


Lump
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Re: Dual AC pumps

Postby Ironsides [OP] » February 22nd 2017, 5:12pm

Lumpy wrote:Thanks for the great explanation... :banana:

Who sells the best kit?


Lump


you're welcome. parts... :confused: probably me, I will be the one, I will step up and make a rebuild kit

For only $300 $500 $3000!! Only!

1- sawn off spindle with rusty bearing
1- handmade tin windmill (rusty and mostly decorative)
1- rusty iron pump that looks like a bagpipe (rusty and mostly decorative)
2- leaky wooden buckets
1- box of bendable sipping straws
1- box plastic strips 3/4" x 3"
1- vintage operable bicycle with headlight generator attachment with good knurling ;) (rusty and mostly decorative)
1- custom sausage tube, length to be determined, preserved with formaldehyde and kiwi oil
1- vintage waist suspenders
1- box old rusty staples for staple gun no longer sold in stores
2- 10' stick 1" gutter (rusty and mostly decorative)
1- 4' stick gutter downspout (rusty and mostly decorative)
1- 100 count 1/8" rivets
1- roll 55yd 2" ducting tape
1- rusty hanger (rusty and mostly decorative)
1- printed copy of original post to figure things out with (printed on vellum, oooh, nice)
1- free subscription to rat rod magazine of choice
1- gallon used mystery fluid (maybe Freon)
1- large rubber glove (may be filled with 20 gallon jello purchased separately... good luck)

Note: Accessory rodent power adapter no longer available
Note: Kit requires minimum 2" lift
Note: Kit requires chassis relocation and extended hood
Note: May make for slippery footing, suggest boat shoes, rubber boots or galoshes
No returns
No refunds
Lead times vary (5-104 weeks until you give up waiting and call off suit)
Handling and Shipping FREE!!
Void where prohibited, unlawful and ill advised.
Modification of vehicle is at sole discretion of owner.
Supplier not responsible for anything.

Give it a week, someone will have it done cheaper and better and I'll be out of business before the first kit ships
Original Poster [OP]
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Ironsides
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: Ironsides has been a member for 6 full yearsIronsides has been a member for 6 full yearsIronsides has been a member for 6 full yearsIronsides has been a member for 6 full yearsIronsides has been a member for 6 full yearsIronsides has been a member for 6 full years
Posts: 233
Topics: 5
Images: 0
Joined: January 2015
Alias (AKA):
Van Model Year: 2001
Van Make/Model: GMC Safari
Extra Info: RWD Custom HD


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