• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Komatsu 220 LC-8 excavator

M

Mud Logger

Active Member
Joined
Apr 28, 2015
Messages
36
Location
Wisconsin
We have a Komatsu 220 LC-8, with supposedly 3000 hours. The main hydraulic valve has developed a moderate to severe hyd fluid leak on the back part of the valve where the In and Out from the main pump oil comes into the circuit valve stack. Under hard steady digging it has built up to a 5 gal leak in 8 hours. Could the pump pressures or reliefs be off?
 
J

jey_c

Senior Member
Joined
Oct 21, 2010
Messages
257
Location
france
try to clean the contol valve and check where it leaks, it sounds like an oring below the divider valve that should be changed
 
M

mikebramel

Senior Member
Joined
Jul 15, 2012
Messages
1,612
Location
milwaukee
Check the flange O-rings, the may be brittle or someone replaced with regular 70 duro when a new hose was fitted.
 
7

707

Well-Known Member
Joined
Mar 20, 2011
Messages
85
Location
Vancouver, B.C.
Occupation
Heavy Duty Equipment Technician
The o-rings between the merge diveder and the main valve are no good. Needs replacing. Usuaully leaks between the two faces. I have done 2 this year so far. Good luck !
 
You must log in or register to reply here.
Top