Kysor fuel pressure switch???

[Sean]

Well, we are done with our second in-frame on our 8V92TA.  It runs like a charm now, but I'm having starting problems.  We've traced the problem to a Kysor pressure switch at the fuel filter.  I have bypassed the switch temporarily, as we really wanted to get out of the shop, and they did not have a replacement in stock.

Now I'm having trouble finding one, and I thought I would call on the collected wisdom of the group to help.

The switch is marked Kysor Cadillac (Kysor was in Cadillac, Michigan) PressureStat 33130-10 NC.  PressureStat is just their trade name for a pressure switch/sender, NC stands for normally closed, and -10 is, I think, the pressure setting, but I am not sure if that is in PSI or Bar.

Kysor Industrial was split up years ago, with parts going to Kysor HVAC (air conditioning), Borg-Warner (fans and belts), and Medallion Instruments (gauges and senders).  As a side-note, the old Kysor plant in Cadillac is now a SuperFund site.  So Medallion is the place I would need to go for a genuine "PressureStat" replacement, but I could not find a cross-reference to this part number (33130) anywhere.  PEDCO gave me a "new" part number of 1042-08240-10, which looks right (single setpoint, 1/8" NPT, single screw terminal, grounding type, normally closed).

Enough of the background, here are my questions:

(1) What does this do?  It's not on my schematic, so I can only guess.  And that guess is: it prevents the starter from cranking once fuel pressure has built to the indicated setpoint.  This prevents you from trying to crank an already running engine, and it also cuts out the starter once the engine is running.  Does this sound correct, or am I all wet?

(2) What is the correct setpoint for this switch?  Would it be 10psi, or 10 Bar (about 145 psi)?

I'm asking because Cole-Hersee and others make similar switches, and it will be much easier to locate a part if I can cross-reference it to a more common manufacturer.  If I know the pressure setting, I can probably find a fuel pressure switch at NAPA.

Any thoughts?

-Sean
http://ourodyssey.blogspot.com

[Len Silva]

Sean,

You're right in that this is a starter protection switch and a stock switch from NAPA should work fine. If it's a one wire grounding circuit type then  standard oil pressure switch might work but if the set point is too low (1-2 PSI) it might disable the starter too soon.  I think a 10 PSI set point is fine and the max pressure is probably not more than 60-70 PSI.

Len

[RTS/Daytona]

here's some very very helpful info about switch

http://www.colehersee.com/pdf/master_cat/l_oil.PDF

http://www.egauges.com/vdo_send.asp?Sender=Pressure_Switch_6_8

http://www.egauges.com/vdo_send.asp?Sender=Pressure_Switch_15


I would think it's to prevent starting an already started engine

my educated guess the switch is  rated PSI  not bar

[RTS/Daytona]

got it

http://www.colehersee.com/catalog_top/index.htm

go to SWITCHES and hit the + to expand

HIT OIL/AIR/VAC to expand

look for switch # 8643

perfect

[RTS/Daytona]

oooops

Replacement for: Chrysler 136080A, 14272A, 1527574, 1594936, 1704329, 1818830, 2822176, 3004106, 617, CH-2468
Replacement (continued) Delco C-1801, Jeep 941968, 9309386, 938092, Motorcraft SW-332, SWC-332

[RTS/Daytona]

gets even simpler

it's also a           WELLS PS30  (button type push on terminal) (accepts push on female) just like Cole Heerse

autozone # ps30

almost any automotive store

[Hobie]

Sean, did you find the source of your engine dirt intrusion? 

[H3Jim]

Sean, I too would  be interested in hearing what the issue was and how Pedco treated you.