2018-06-18
195-441M
3S-3000/F/HD/HDF
Maintenance and Lubrication
70
Bleeding Opener Lift Hydraulics
1.
Review warnings, bleeding notes and system
information on page 68.
2.
Make sure opener frames are locked up in ROAD
position. Refer to Opener Lock Up, page 24.
3.
Turn knob on both pressure-control valves
completely counterclockwise, then turn valves
clockwise far enough to build up 1000 psi (about
three turns).
4.
Turn knob on bypass valve completely clockwise for
no oil flow.
5.
Loosen six hose-end JIC fittings at three locations on
the opener-lift circuit:
• both JIC fittings on the two
3
8
in opener lift hoses
feeding the center opener lift cylinders,
• the JIC fittings on the two
3
8
in opener lift hoses
feeding the center opener lift cylinders, and;
• the end where these center two hoses tee at the
middle of the center box frame.
6.
Slowly supply oil to top side of pressure-control
valves until oil begins to appear at a loosened hose
fitting. As oil begins to appear at a fitting, tighten that
fitting.
7.
Slowly supply oil to bottom side of pressure-control
valves until oil begins to appear at remaining
loosened hose fitting. As oil begins to appear at the
fitting, tighten fitting. Continue to supply oil to bottom
side of pressure-control valves until all openers are
raised completely.
8.
Move opener transport locks to FIELD position and
cycle openers up and down ten times. Each time you
lower openers, hold tractor remote lever until opener
circuit builds up to pressure set at control valves.
9.
After cycling openers, return opener transport locks
to ROAD position, and lock openers up.
Figure 74
Bleeding Opener Lift Hydraulics
20009
