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JamesPC35mr-2

Active Member
Joined
Sep 9, 2021
Messages
26
Location
San Diego
Hi, and thanks for the help in advance. Been on here for a while and this is my first post, hopefully it’s in the correct place.

I have a 2007 PC35MR-2, I have owned this machine for 4 years and use it only for personal use. I’ve been dealing with the issue the entire time, and manage my way around it. The Machine is in Az several hours from a Komatsu dealer. I have had a few local people look at but they aren’t familiar with the Komatsu. I’ve been trying to figure this out myself when I have time. I have done pressure test in the past and from what I’ve been able to check they are all normal. When I block the tracks I get 3500 PSI. When I’m driving the machine it tracks weak and when I use boom or stick functions at the same time, all functions get very very slow. So, I’m thinking that I have a swash plate issue, I think it’s not adjusting to meet the flow demand. I’m not sure specifically how this works though I understand the hydraulics involved. I’m not sure if I should be looking at the LS valve and or the PC valve or if I’m even headed in the right direction. The machine runs great and does one function okay, but tracks slow and multi function is very slow. Thanks in advance!
 

JamesPC35mr-2

Active Member
Joined
Sep 9, 2021
Messages
26
Location
San Diego
My tracking is all even. My gear pump was not making the required psi. Replaced that, seems better. Still not the fastest machine.
 

sabric

New Member
Joined
Jan 14, 2025
Messages
2
Location
Connecticut
I have the same machine and similar symptoms as your's. Engine runs flawlessly but hydraulics are not working correctly or weak. When tracking forward or attempting to, the left track will move very slowly or barely move unless I slightly curl the bucket in. the, the left track will keep up with the right and the machine will move better. The swing seems weak to me but I've never operated another PC35MR-3. Digging is not s problem but as she warms on on the really hotter days it will start to lose power. All filters and hydro fluid has been changed.

I have also managed with it as is but I do like the machine and would love to make it right. I am leaning towards s bad pump but that's a pricy part to change.
 
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