The forward clutch hub/drum needs to be assembled correctly – belville washer installed correct way &. The forward clutch pack clearance needs to be adjusted correctly. If any of these seals are damaged – oil pressure is lost.
The two small teflon rings on the end of the shaft are also easy to damage. It’s easy to damage piston seals while installing them into their carriers. There are many things that can wrong during assembly. Also join an online forum like – this one is great for advice from machinery owners & repairers.
CASE 850 DOZER TRANS FILTER LOCATION MANUAL
I strongly suggest you purchase a service manual if you already don’t have one. Here’s a link to CNH online parts search using your model. The seals are also available from bearing suppliers once you have it out for a sample. Rebuild kits were available from CNH, however they were expensive due to a lot of unnecessary items being in them. The seal is the main one in the centre of the housing, it’s about 8″ in diameter. You need to clean that breather at the transmission filler pipe. There should be a small rubber hose from the top of the transmission connected to the recovery bottle, perhaps someone has connected another breather to that hose? You need to check that out. There is not normally a breather in the location you are describing. Thanks for visiting! If you have learned something here & would like to show some appreciation for answers to your questions – Donations are now accepted here. If you need any other question answered regarding your CASE Crawler Loader Dozer please leave a comment in the box at the bottom of the page & I’ll get back to you ASAP. Get the machine to operating temperature at an idle check each individual gear the transmission pressure & response time should be EXACTLY the same for each selection. Q: What do I look for when buying a used dozer / loader? Q: My machine has lost all drive & hydraulics!Ī : Flexplate likely is broken – check inside engine bellhousing for debris. Q: Why does one track want to drive even when in neutral?Ī : There is a broken plate in a clutch pack, locking it up & causing it to permanently drive. Sometimes faulty seal rings at clutch pack piston seals. Often oil control rings on shafts are at fault. Why is there a hesitation when I change gears/range?Ī: There is a problem with internal oil leakage on the slower side. Q: Why won’t my machine engage left & right tracks at the same time? eg – two being engaged at the same time (fwd & rev / low & hi on same side) If all clamps are tight & no leaks are present – the problem could be the charge pump itself.ġ) Air flow through radiator / oil cooler restricted with dirt, grass etc.(usually effects engine temp as well)Ģ) Loss of oil flow due to bad pump or internal leakage at torque convertor or transmission clutch packsģ) Transmission oil being superheated by faulty clutch pack operation. If any oil leaks are present, while machine is parked – these are usually leaks on the suction side of system & need repair. Q: When cold, why does my transmission not engage drive straight away?Ī: Often this is due to a lack of pressure due to the transmission pump sucking air – cavitating. If yours is broken, think about getting it replaced. TIP – Most Case crawlers have transmission pressure gauges – this is a valuable tool for diagnosing faults.
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