Discussion:
OLD Clark CF40B With Zenith Fuel System

Have a Clark CF40B With the Zenith Water jacket style Vaporizor and what I'm told is called the C Regulator right after it,it has the two diaphragms that you can unscrew from the unit.....Customer says it starts hard when cold.....it has a new ignition Sytem on it and I replaced the Vaporizor recently but not this C regulator as my shop can't find one for less than 5-600$$$$..... What is a good way to check this reg and what is the adjustment procedure for the screw that is in the end of it? What fuel PSI should I be getting out of it To the zenith air fuel mixer(is a street elbow style mixer,no Diaphrams in it)....
  • Posted 29 Oct 2013 05:40
  • By kevin_t
  • joined 2 Dec'10 - 1,301 messages
  • Pennsylvania, United States
Showing items 1 - 9 of 9 results.
Pennsylvania, United States Do they make a conversion kit to convert this over to an impco model J or Cobra style regulator,one with a plug for where the Vaporizor is now? Where is it you tie in your coolant lines for the Impco Regulator....mounting it????
###My favorite is PNG technologies for kits. Matt Nolff and crew offer technical advice as well.
  • Posted 8 Nov 2013 23:29
  • By Forkliftt
  • joined 13 Jul'09 - 321 messages
  • Louisiana, United States
Steve
steve at forkliftt dot com
Yes sir Mr Fixit and if the cable is broken at the carb, it will let the choke close when starting. These were a pain in the *** systems as usually the regulator housing would rust and was a real fun fix to seal including the through bolt.
  • Posted 8 Nov 2013 09:35
  • By RCAV8TOR
  • joined 12 Nov'11 - 366 messages
  • Alabama, United States
What i used to do all day now takes me all day to do.
That should have a choke and cable on the carb. If that is working right it should help cold starting. It also has a idle mixture screw on the carb.
  • Posted 29 Oct 2013 20:43
  • By mrfixit
  • joined 11 Dec'08 - 1,434 messages
  • New York, United States
There is a conversion available- just know that the regulator as well as the mixer (carb) will have to be replaced. Those round diaphragms you're presently dealing with used to be called "elephant ears". I haven't been able to locate any for a while hence the need for a conversion.
  • Posted 29 Oct 2013 11:24
  • By bbforks
  • joined 1 Mar'12 - 1,437 messages
  • Pennsylvania, United States
bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
If you Google Impco conversion kit you should find several companies that do them. I have used Alternative Fuel in the past.
Their website is www dot altfuel dot com. replace the dot with a period. All you need to do is give them the model, engine and what fuel system is on the truck and they will either have one on the shelf or can put one together.
  • Posted 29 Oct 2013 09:37
  • By Partsguy5
  • joined 13 Jun'12 - 409 messages
  • California, United States
Do they make a conversion kit to convert this over to an impco model J or Cobra style regulator,one with a plug for where the Vaporizor is now? Where is it you tie in your coolant lines for the Impco Regulator....mounting it????
  • Posted 29 Oct 2013 08:32
  • By kevin_t
  • joined 2 Dec'10 - 1,301 messages
  • Pennsylvania, United States
There should be a screw in the front of the regulator. I use to take a cup of water and put the hose coming out of the regulator in it. You should see a bubble of fuel about a second or two apart. If it is coming out at a steadier pace than that try to adjust it by turning the screw. If that doesn't work you may need to replace system.
  • Posted 29 Oct 2013 08:01
  • By rogeriwt
  • joined 10 Apr'07 - 323 messages
  • Massachusetts, United States
Coolant level is full......
  • Posted 29 Oct 2013 06:06
  • By kevin_t
  • joined 2 Dec'10 - 1,301 messages
  • Pennsylvania, United States
Make sure you have good coolant levels. old style system. you might want to convert to a newer IMPCO Style
  • Posted 29 Oct 2013 05:58
  • By Prentice
  • joined 25 Jun'08 - 600 messages
  • Ontario, Canada

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Upcoming industry events …
September 4, 2025 - Melbourne, Australia
September 17-18, 2025 - Miami, FL, United States
October 21-23, 2025 - Barcelona, Spain
Global Industry News
edition #1244 - 21 August 2025
In our feel good story for the week, we report on a donation from Wisconsin-headquartered Big Forklifts to the University of Wisconsin-Madison’s College of Engineering, after discovering the institution was still using one of its 1960s walkie stackers... Continue reading
Upcoming in the editorial calendar
WIRELESS CHARGING
Aug 2025
MANAGING MIXED FLEETS
Oct 2025
Toyota launches three new stackers Columbus, IN, United States

PREMIUM business

ROYPOW
Manufacturer of lithium forklift battery solutions, the global leader in the market of lithium batteries replacing lead acid batteries.
Toyota launches three new stackers Columbus, IN, United States
Upcoming industry events …
September 4, 2025 - Melbourne, Australia
September 17-18, 2025 - Miami, FL, United States
October 21-23, 2025 - Barcelona, Spain
Movers & Shakers
Jan Zuurbier Jan Zuurbier
Global CEO, Swisslog
Board member, UKMHA
Strategic advisor, Roboteon
CEO Americas, Hai Robotics