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Clutch / Transmission
Hello. We are working on a Caterpillar forklift. Model V40C, serial 10Y00553, standard transmission. We are working on the clutch and noticed that some things seem to be backwards compared to most other forklifts. We have talked with two CAT dealers, one said it was too old to provide any service information, and the other one hasn't returned our messages.

The way the pump is plumbed it seems to draw fluid from the bell housing instead of the tank which keeps the tank pressurized and the bell housing completely full. The lift has been working that way for as long as we know but want to eliminate a chance of failure in the future if it is incorrect. We don't know if that's the way it is supposed to be or if someone had done previous work incorrectly. Does anyone have experience with this particular forklift and/or service information to reference?

Thanks for your time.
  • Posted 6 Sep 2014 05:47 AM
Total replies: 5. Showing items 1 - 5 of 5 results.
Replies
  • bbforks
  • Pennsylvania, United States
The cat's I've worked on pull from the tank & spray into the bell housing. It does sound like yours is plumbed backwards. If memory serves me right there should be a nozzle assy on the upper part of the bell housing to spray the oil onto the clutch disc.

You could eliminate the wet clutch set-up & just install a normal dry clutch set-up- I've done that on occasion.

Usually when there's too much oil in the bell housing the starter begins to leak because of excessive pressure. How much oil was in the bell housing when you removed the clutch assy?

bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
  • Posted 6 Sep 2014 08:18 AM
I am the mechanic who disassembled the old cat. There was quite a bit of fluid in the housing. This machine in particular doesn't have a nozel, just a fitting on top of the bell-housing. By chance does anybody know of an old Cat dealer that may have some info on this old truck?
  • Posted 9 Sep 2014 11:41 PM
  • bbforks
  • Pennsylvania, United States
I doubt any cat dealer would have any info on this older unit. Cat got into bed w/Mitsubishi years ago & all the older cat's took the hit when it came to parts/info, etc.

bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
  • Posted 11 Sep 2014 11:00 PM
The parts diagrams/numbers are still accessible but your going to find someone who has some old service manuals for anything else.
  • Posted 19 Sep 2014 10:50 AM
  • edward_t
  • South Carolina, United States
I don't have any printed information on this old cat, but I am old enough, and enough of a cat tech to have worked on these when they and I were young, and still [kind of] remember these units.
if the bell housing is filling up with fluid, the most likely cause is the pickup screen in the fitting the hose on bottom of the trans. (provided this really is a standard wet-clutch transmission, [there were a few transmission options, including a true hydrostatic transmission]). this screen is to the inside of the trans and will not be seen unless you take the fitting out of the trans case, that the hose is connected to. this is a very fine mesh screen, and will be where the flow (out of the bell housing) is most likely restricted.

"it's not rocket surgery"
  • Posted 19 Sep 2014 08:49 PM
  • • Modified 20 Sep 2014 10:31 PM by poster
Total replies: 5. Showing items 1 - 5 of 5 results.

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