TYM - T474HC RPM loss problem fixed.

[CloverKnollFarms]

On my Mahindra (A tym in disguise) the fuel filter is in front of the radiator.

Wow, mine is at the rear of the engine. No fuel lines are forward of the injector pump

 

[oldnslo]

It's called, "hydraulic locking". It can happen due to a few issues with the hydraulic system.

Agree filters can collapse but unless filter housing is rated for system pressure the hydraulic lock would not stall the engine.

1. Condensation buildup in the hydraulic fluid and freeze in the Winter time, which willcollapseahydraulicfilter. 2. Condensation buildup in the warmer months can cause rust buildup that's carried into the filter, which will also collapse it. And 3. A combination of condensation buildup in the diesel fuel can cause water to mess with the injectors and the condensation buildup in the hydraulic system at the same time. I bought my New Holland brand new in 1999 and I've had the same problem three times. I'm dealing with that right now. It's almost fixed, but I have to drain the fluid and replace all of the hydraulic filters.

I presume this is an occasional use tractor that never gets operated long enough to get the oil hot and help remove the condensation. On a machine built in 99 I would be suspicious of some rubber component aging allow rain water into the system.

 

[Gasifier]

1. Does your tractor have a hydrostatic transmission? YES

2. Did you buy it brand new? YES

3. Did it set on the dealer's lot in the Winter before you bought it? I DON’T KNOW.

Also, when the dealer replaced the collapsed filter, did they drain and replace the hydraulic fluid? YES

Did you check your sediment bowl for water collection? THEY DID THAT WITH 50 HOUR SERVICE.

The cause was found to be a pinched fuel line.