D6N XL Dozer Mossy Green Transmission oil

Joe H said: Kale & arugula smoothie? Joe H Click to expand... Exactly.... sounds healthy - with a twist of trans fluid

smphillipstx said: I now need to refocus on what is causing the hyd filter restriction code considering still comes on with new filter. Click to expand... The transmission filter bypass spring/spool are #1 & 2 in the illustration below. there should be a switch somewhere - they are often not shown in the section drawing of the filter. The plugged hydraulic filter warning is actually for the case drain filter. That is the small spin-on element, NOT the main element located in the hydraulic tank. that filter is where all the wear particles from the expensive hydraulic components tend to end up. The Service Manual speaks thusly....... Case drain filter (1) is mounted in the line that returns case drain oil to the hydraulic tank from the implement hydraulic pump, the steering pump, and the steering motor. Case drain oil flows through the filter base into the filter housing. The oil fills the space between the inside of the filter housing and the filter element. Then, oil flows through the filter element and back to the filter base. Oil from the filter base flows to the hydraulic tank. The filter element stops any debris that is in the oil. If the filter element fills with debris, the restriction to the flow of oil causes a pressure increase. The increase in pressure causes a bypass valve to open. Unfiltered oil is allowed to flow into the hydraulic tank. Unfiltered oil can cause damage to components in the hydraulic system. Based on the above it might be an idea to have someone hook Cat ET up to the machine and download a Product Status Report (PSR). A scan of that document should let the dog get a better view of the rabbit.

Nige said: there should be a switch somewhere - they are often not shown in the section drawing of the filter. Click to expand... Transmission filter bypass alarm is created by a pressure switch #2 located in the head of the filter.

Nige said: The transmission filter bypass spring/spool are #1 & 2 in the illustration below. there should be a switch somewhere - they are often not shown in the section drawing of the filter. View attachment 364099 The plugged hydraulic filter warning is actually for the case drain filter. That is the small spin-on element, NOT the main element located in the hydraulic tank. that filter is where all the wear particles from the expensive hydraulic components tend to end up. The Service Manual speaks thusly....... Case drain filter (1) is mounted in the line that returns case drain oil to the hydraulic tank from the implement hydraulic pump, the steering pump, and the steering motor. Case drain oil flows through the filter base into the filter housing. The oil fills the space between the inside of the filter housing and the filter element. Then, oil flows through the filter element and back to the filter base. Oil from the filter base flows to the hydraulic tank. The filter element stops any debris that is in the oil. If the filter element fills with debris, the restriction to the flow of oil causes a pressure increase. The increase in pressure causes a bypass valve to open. Unfiltered oil is allowed to flow into the hydraulic tank. Unfiltered oil can cause damage to components in the hydraulic system. View attachment 364100 Based on the above it might be an idea to have someone hook Cat ET up to the machine and download a Product Status Report (PSR). A scan of that document should let the dog get a better view of the rabbit. Click to expand... See attached PSR Thanks!

Nige said: The transmission filter bypass spring/spool are #1 & 2 in the illustration below. there should be a switch somewhere - they are often not shown in the section drawing of the filter. View attachment 364099 The plugged hydraulic filter warning is actually for the case drain filter. That is the small spin-on element, NOT the main element located in the hydraulic tank. that filter is where all the wear particles from the expensive hydraulic components tend to end up. The Service Manual speaks thusly....... Case drain filter (1) is mounted in the line that returns case drain oil to the hydraulic tank from the implement hydraulic pump, the steering pump, and the steering motor. Case drain oil flows through the filter base into the filter housing. The oil fills the space between the inside of the filter housing and the filter element. Then, oil flows through the filter element and back to the filter base. Oil from the filter base flows to the hydraulic tank. The filter element stops any debris that is in the oil. If the filter element fills with debris, the restriction to the flow of oil causes a pressure increase. The increase in pressure causes a bypass valve to open. Unfiltered oil is allowed to flow into the hydraulic tank. Unfiltered oil can cause damage to components in the hydraulic system. View attachment 364100 Based on the above it might be an idea to have someone hook Cat ET up to the machine and download a Product Status Report (PSR). A scan of that document should let the dog get a better view of the rabbit. Click to expand... That "hydraulic" spin on filter (1 above) is the one we replaced when first getting the code. All clean found no issues.

smphillipstx said: Received a E1267-1 Code "Hyd Filter Restriction" Further investigation while pulling a sample to send off to Cat lab, a "mossy green hydraulic oil. Viscosity feels normal, no evidence of water intrusion. Send sample off to lab today. Anyone experience this exact problem? Click to expand... I am correcting post # 1. No longer able to edit it. changing "a mossy green hydraulic oil" to a mossy green tansmission oil".

Do you suppose a machine that old and that few of hours could the green be caused by corrosion of the splintered bronze discs?

pittsburgh cat man said: Do you suppose a machine that old and that few of hours could the green be caused by corrosion of the splintered bronze discs? Click to expand... Will that degradation show up in a cat Oil Analysis? Still waiting on lab to upload to VL

It might Can't say I ever ran into oil like that but that was all I could think of but again I can't remember a machine that old with that few of hours

smphillipstx said: That "hydraulic" spin on filter (1 above) is the one we replaced when first getting the code. All clean found no issues. Click to expand... OK, so that clears that up. You replaced the correct filter for the warning shown on the Monitor panel but for the wrong reasons, thinking it was transmission when it is in fact for the hydraulic system which is completely separate. I suppose that begs the question a bit as to where exactly the oil in the sample bottle shown in your first post actually came from. Please don't tell me the tank on the RH fender.........

After changing filter in hydraulics didn’t clear code, inspected wiring, didn’t see anything obvious. Then changed filter in transmission. The green sample cam from transmission. I inadvertently typed it came from hydraulics is post 1, after discovering the posting mistake, was unable to correct by edit. After a certain amount of time, the thread doesn’t allow you to edit so I made a follow-up post (see post #46). No, the right hand fender is where I sampled the amber colored hydraulic fluid. Used a Cat hand pump and pulled from transmission oil sample from dipstick left rear fender (mossy green).

smphillipstx said: After changing filter in hydraulics didn’t clear code, inspected wiring, didn’t see anything obvious. Click to expand... So the logical next step would be to locate and remove the pressure switch on the hydraulic system case drain circuit and check the Part Number on it. I see an updated Part Number that was introduced to address "issues of incorrectly indicating by-pass that were experienced with the former switch" which could potentially be your problem. I cannot find a switch shown anywhere close to or on the implement case drain filter. I CAN find a switch on the steering filter #22 which is all part of the implement hydraulic circuit because it supplies oil to both the hydraulic & steering system. That filter is located in the left side of the engine compartment right behind the radiator. Unplug the 2-pin connector and try jumpering the machine harness that connects to it and see if the plugged filter warning goes away. If it does then maybe you need to investigate the filter element in that location. Thanks for confirming where the transmission oil sample came from. On that system you are back to the drain/flush/filter change (rinse & repeat) that we discussed some time back. I suggest that you take the advice of @Coaldust and not bother with biocide treatments, simply flush the system then work the bejasus out of the machine. The heat generated from that should kill whatever organism is left.

Mind boggling thread. All new to me. Very interesting

Nige said: So the logical next step would be to locate and remove the pressure switch on the hydraulic system case drain circuit and check the Part Number on it. I see an updated Part Number that was introduced to address "issues of incorrectly indicating by-pass that were experienced with the former switch" which could potentially be your problem. I cannot find a switch shown anywhere close to or on the implement case drain filter. I CAN find a switch on the steering filter #22 which is all part of the implement hydraulic circuit because it supplies oil to both the hydraulic & steering system. That filter is located in the left side of the engine compartment right behind the radiator. Unplug the 2-pin connector and try jumpering the machine harness that connects to it and see if the plugged filter warning goes away. If it does then maybe you need to investigate the filter element in that location. View attachment 364120 View attachment 364121 Thanks for confirming where the transmission oil sample came from. On that system you are back to the drain/flush/filter change (rinse & repeat) that we discussed some time back. I suggest that you take the advice of @Coaldust and not bother with biocide treatments, simply flush the system then work the bejasus out of the machine. The heat generated from that should kill whatever organism is left. Click to expand... Working on it. Thanks Nige!!

Probably stupid response, but could the implement pump be leaking into the transmission case and causing the odd color in the transmission since both oils are dyed?

Nige said: So the logical next step would be to locate and remove the pressure switch on the hydraulic system case drain circuit and check the Part Number on it. I see an updated Part Number that was introduced to address "issues of incorrectly indicating by-pass that were experienced with the former switch" which could potentially be your problem. I cannot find a switch shown anywhere close to or on the implement case drain filter. I CAN find a switch on the steering filter #22 which is all part of the implement hydraulic circuit because it supplies oil to both the hydraulic & steering system. That filter is located in the left side of the engine compartment right behind the radiator. Unplug the 2-pin connector and try jumpering the machine harness that connects to it and see if the plugged filter warning goes away. If it does then maybe you need to investigate the filter element in that location. View attachment 364120 View attachment 364121 Thanks for confirming where the transmission oil sample came from. On that system you are back to the drain/flush/filter change (rinse & repeat) that we discussed some time back. I suggest that you take the advice of @Coaldust and not bother with biocide treatments, simply flush the system then work the bejasus out of the machine. The heat generated from that should kill whatever organism is left. Click to expand... Nige, you are absolutely awesome! Followed your instructions with the pressure switch test, code went away after jumping the harness. Removed jumper and code returned. Filter and Oil is very clean, wiring in tact without any issues. Ruled out an ECU problem looking at the PSR I pulled. CONCLUSION for Hydraulic Code E-1267-1. Bad Pressure switch. Ordered new switch part number 3496097 (Nige can check if this is the old or new part number as Cat doesn't know nor part number stamped on existing pressure switch). Will replace filter element (and o-ring). Lab reports on Hydrauli oil come back as good (see attached). CONCLUSION for Transmission odd color and overall visual condition: Although lab reports the sample as good (see attached), I will be changing out the oil and another new filter, and have operator go run the hell out of it. Although the lab does not test for bugs, Absent of any water as tested, It is my opinion that the oil is contaminated with some type of bug. This is rare, but it happens. Thanks everyone for your input and special thanks for the invalable NIGE!!!!!!!!!!! What an asset to this forum he is.

smphillipstx said: CONCLUSION for Hydraulic Code E-1267-1. Bad Pressure switch. Ordered new switch part number 3496097 (Nige can check if this is the old or new part number as Cat doesn't know nor part number stamped on existing pressure switch). Click to expand... I see nothing newer than 349-6097 which is the updated switch part number. There may not be a P/N on the existing switch but I bet there is a 6-letter Date Code as illustrated in the example below. EDIT: Apparently the latest iteration of 349-6097 was fitted to tractors with S/N PER01144-Up. If that is true then your machine didn't have the latest version of the switch installed. smphillipstx said: CONCLUSION for Transmission odd color and overall visual condition: Although lab reports the sample as good (see attached), I will be changing out the oil and another new filter, and have operator go run the hell out of it. Although the lab does not test for bugs, Absent of any water as tested, It is my opinion that the oil is contaminated with some type of bug. This is rare, but it happens. Click to expand... Both the transmission (17/15/12) and the hydraulic (18/16/12) system have excellent cleanliness. The contamination in the transmission oil has to be biological IMHO. As mentioned earlier the age of the oil was not helping. It appears as though we may have light at the end of the tunnel........

There isnt any komatzu machines in your fleet or oil it seems to me they had a green oil.

Tyler d4c said: There isnt any komatzu machines in your fleet or oil it seems to me they had a green oil. Click to expand... Tyler - we have no Komatzu equipment - just Cat, JD, & CNH

I’ve seen a green oil before but don’t remember what.