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hydraulic downforce system
JD 1890 CCS, 1990 CCS (dual-rank CCS) air drills
for
(See different instructions for air drills with air carts, single-rank CCS, box drills.)
Installing the cylinders:
1) Remove big coil spring on each opener: Lower the openers until they're touching the ground or
shop floor, then put circuit in Float. Note: Only remove the first nut from OEM spring's rod (the
second nut pre-loads the spring; no need to mess with it). Knock out roll-pin (roll-pin punch
provided). Coil spring & rod/clevis apparatus lift out.
2) The lower end of cylinder's rod slides into cast bushing;
seat it with several whacks from a rubber mallet on a solid
surface (adding a drop of red Loctite is wise; provided)
(Note: turning the bushing on the rod by hand often allows it
to go easily; if bushing won't go into position, use fine
emery cloth in bushing hole).
3) Install fittings into each cylinder's port (use 90-degree
fittings where noted on the schematic). Tighten all fittings
(90s should be pointed primarily forward/up).
4) Set cylinder + bushing into large flat washer, then into
hole in cast opener (see photo A).
5) For 90-series openers: From bottom side of opener
casting, the notched plate slides over cylinder rod and its
ears go forward over the opener arm (see photo A). Position
the ear of plate behind/below nut on boot attachment bolt.
On Pro-series, see Photo B for orientation of notched plate.
Secure notched plate with 3/4" flange locknut, being sure prongs
on the end of bushing mate into notches of plate as you tighten.
Tighten nut sufficiently that notched plate draws tight against
lower end of bushing (Note: bushing is longer than hole in the
shank).
6) Insert pin into top clevis of cylinder, and secure with roll-pin.
_______________________
U.S. Patent 9,930,822; other Patents Pending.
INSTALLATION & ADJUSTMENT
7
Exapta
including Pro-series openers
of
s UniForce
J
Photo A
Photo B
(Pro-series)
Instr. revised 4 July 2019.
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Table of Contents
Related Manuals for Exapta UniForce
Summary of Contents for Exapta UniForce
- Page 1 INSTALLATION & ADJUSTMENT Exapta s UniForce hydraulic downforce system JD 1890 CCS, 1990 CCS (dual-rank CCS) air drills including Pro-series openers (See different instructions for air drills with air carts, single-rank CCS, box drills.) Installing the cylinders: 1) Remove big coil spring on each opener: Lower the openers until they’re touching the ground or shop floor, then put circuit in Float.
- Page 2 Installing supports for header hoses: 1) Trays are positioned directly above the rank of openers that they serve. Position center trays at an offset fore/aft so they aren’t directly in line with wing trays (see Photo B) (they need clearance when wings fold).
- Page 3 Photo G. RH wing: rear tray, outer end. Brkt #0003. Button-head bolts need to be tightened yet. Header hose is already assembled & lying across the U-bracket here. Photo H. When rear rank gets UniForce, the electrical bracket must be replaced w/ Exapta’s #0023 (shown).
- Page 4 Installing header hoses: 1) For each rank of each drill section, organize header hoses & fittings per schematics provided. These are ¾" hoses of different lengths (which are the numbers—in inches—on the hose in schematic). Put all pieces together, but don’t tighten them yet (these are flared [JIC] fittings that don’t need Teflon tape;...
- Page 5 Zip-tie the long hoses as they run along drill’s tongue (large zip-ties provided). 4A) If the tractor has a spare remote, the preferred setup is to run UniForce separately on that remote. The LH ports (3/4") (‘P2’ & ‘T2’) of the UniForce manifold should have plugs in them.
- Page 6 1/2" x 21" hoses. The upper port of the UniForce manifold (‘P2’) goes to the port of the OEM valve block marked ‘V2’; lower port (‘T2’) of the UniForce manifold goes to the port of the OEM block marked ‘V1’ (usually this results in the hoses crossing each other to make an ‘x’).
- Page 7 Prepare the system Get all the air out of the lines! The easiest way is to set the tractor’s flow for the UniForce circuit to 5% (aka “0.5”) so it’s just a trickle. Put blocks under all the openers, so that when you rotate the rockshaft into the ‘down’...
- Page 8 (which remains pressurized when rockshaft is raised) when lowering the openers to begin the pass. 2) Adjust knob for opener pressure (the UniForce system) until you are maintaining a reasonably uniform depth of cut. Running more than necessary, however, will cause sidewall compaction.
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