Yetter 6150 Series Markers - Manual (Page 48)

48
TROUBLESHOOTING
Problem
Markers do not function
correctly
Marker blade does not leave
good enough mark
Both markers activate at
same time
Marker blade digging too
much dirt
Tri-fold marker will not raise
from operating position
Cause
Markers raise and lower
voluntarily
Blade not moving sufficient
dirt
Sequence valve not operating
Blade set at incorrect angle
Not enough hydraulic
pressure
Solution
Check tractor hydraulic
system
Check hydraulic hose
couplings
Purge air from hydraulic
system see Installation:
hydraulic hoses
Hydraulic cylinder failure,
repair as necessary
Check sequence valve for dirt
or damage.
Adjust angle of blade to be
more aggressive.
Use notched marker blade,
6001-495. (6001-610 w/depth
band assembly.)
Reverse blades on hubs to
push dirt out.
Air in hydraulic lines
Check for dirt in spool or
replace sequence valve
Adjust angle of blade to be
less aggressive
Check and repair tractor
hydraulic pump (2400 PSI
minimum)
Replace hydraulic cylinder
with ½” larger diameter
cylinder. Example: replace a
3” x 8” cylinder with a 3-1/2” x
8” cylinder