Caterpillar T40B:
Need help sorting out the fuel system on a Cat T40b

Full disclosure - I'm not in the forklift business, I'm just trying to help my wife's family get this thing going so they can sell it as running machine. I searched all over the 'net and this forum is among the very few potential resources I could find. Any help would be greatly appreciated and thanks in advance for any help offered.

My father-in-law passed away and he had a Cat T40B. I know it ran well right after he got sick as I was the last person to use it, but then it sat for about a year completely untouched. I've cleaned the carb and got it running from a gas can, then cleaned the tank and lines, as well as replaced the filters, and now have it kinda running (see below - idle issues) from the tank but I have a few questions:

1. There is a valve on the driver's left lower side that has two feeds (or a feed and return) from the fuel tank and the center feeds the fuel to the engine. The **** is missing, but I've managed to determine that in one position it connects the port on the side of the tank to the engine feed and with a quarter-turn, it connects the port on the top of the tank to the engine feed. But what exactly is it and what is its purpose?

2. When I cleaned the (Holley single barrel) carb, I didn't touch the external idle set/stop screw that impinges on the choke arm, but now, the engine won't idle unless you slightly depress the throttle and the idle set/stop screw shy of the choke arm about 1/8" or so. I don't want to adjust it without at least trying to get some info. Unfortunately, I forgot to note its position prior to the carb removal and cleaning, but I know for a fact that it ran well prior to sitting and I also know it was untouched for the year it sat up. Can anyone provide any pointers or if it isn't asking too much, anything from a manual to help set up the linkage and carb (even a parts diagram would help at this point).

Thanks again in advance for any help, guidance or information.
  • Posted 5 Oct 2020 03:12
  • Discussion started by RScott
  • Mississippi, United States

Having trouble using the Discussion Forums? Contact us for help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Inside Forkliftaction

There have been a number of reports about warehouse automation in the last few weeks, suggesting that robotics is fast becoming mainstream.
This week, we report on another two implementations of autonomous equipment.
As we approach the busy holiday season, there are predictions that retail spending will surpass previous years
...Continue Reading

Movers & Shakers

senior director of corporate development
Seegrid, United States
head of design
Seegrid, United States
director of advanced development
Seegrid, United States
head of finance
IPAF, United Kingdom

Inside Forkliftaction

There have been a number of reports about warehouse automation in the last few weeks, suggesting that robotics is fast becoming mainstream.
This week, we report on another two implementations of autonomous equipment.
As we approach the busy holiday season, there are predictions that retail spending will surpass previous years
...Continue Reading

Movers & Shakers

senior director of corporate development
Seegrid, United States
head of design
Seegrid, United States
director of advanced development
Seegrid, United States
head of finance
IPAF, United Kingdom

Inside Forkliftaction

There have been a number of reports about warehouse automation in the last few weeks, suggesting that robotics is fast becoming mainstream.
This week, we report on another two implementations of autonomous equipment.
As we approach the busy holiday season, there are predictions that retail spending will surpass previous years
...Continue Reading

Movers & Shakers

senior director of corporate development
Seegrid, United States
head of design
Seegrid, United States
director of advanced development
Seegrid, United States
head of finance
IPAF, United Kingdom