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Komatsu WA470-5H hydraulic oil in transmission

K

kemark

Member
Joined
Nov 17, 2019
Messages
10
Location
Brzeg
Hello,

I have a komatsu WA470-5H machine. I have a problem with hydraulic oil that gets into the transmission. After starting the machine, oil comes in in a few minutes. Please help. what to check first?
 
John C.

John C.

Senior Member
Joined
Jun 11, 2007
Messages
12,870
Location
Northwest
Occupation
Machinery & Equipment Appraiser
I don't know the vintage of your machine but Komatsu used plenty of aluminum bodied gear pumps on wheel loaders and the bodies were only good for a maximum of 5,000 hours before they swelled and put oil out the drive shafts into the tranny.
 
K

kemark

Member
Joined
Nov 17, 2019
Messages
10
Location
Brzeg
Thank you for the information. There is actually a gear pump with an aluminum housing. He will dismantle the pumps and check. I will let you know what I found.
 
S

syed adii

New Member
Joined
Oct 28, 2023
Messages
1
Location
pakistan
we are facing same issue hydraulic oil mix in transmission oil. we change 2 pumps but after couple of hours pump seal again . during this behavior one thing we notice the machine main hydraulic pump outlet pipe oring leak again and again then leak the pump seal.
we have komatsu wa-470
 
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