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Komatsu pc75uu-3

J

jeffrob

New Member
Joined
Jun 23, 2016
Messages
3
Location
Melbourne Australia
My machine has been standing idle for approx. 2 months. When started, all functions work except for boom up and boom down. Any ideas where to start looking?
 
I

Iworkondiggers

Member
Joined
Sep 1, 2021
Messages
11
Location
Aus
Check ppc pressure to the spool for boom up/down, ift here is pressure at spool, spool may be jammed.
And do a cylinder bypass test
 
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