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Cat d4c hydraulic tank holding pressure

Alejo99

Member
Joined
Sep 6, 2021
Messages
5
Location
Florida
Hello ! Today I started my dozer and moved it . Ran in for like 15 minutes. Then parked it and came back about 3 hours later . I opened the hydraulic tank cap and a good amount of pressure came out . The hydraulic oil also did a gargling/bubbling noise when I opened the cap. The noise lasted for a couple seconds. What can be causing this ? Is it normal?
The sn is 4ls00504 cat d4c .
Thanks
 

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,257
Location
Canada
There's always some pressure released on my 931B that isn't much different. Sometimes I leave the cap loose for 20 seconds or so to let the air escape. Never heard gurgelling but the filter is right there so could be some oil draining from the filter.
 
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