Great Plains 4000TT Operator Manual - Manual (Page 25)

Great Plains Mfg., Inc. Table of Contents ►
Section 1: Assembly
12/15/2004 Series I 1000TT- 4000TT Turbo-Till 586-043M
23
Hydraulic Cylinder Purging Procedure
Pin the base end of the hydraulic fold
cylinders (1) to the fold bracket as in Figure 12.
Use 1” Clevis pins (3), machine washers and
3/16 x 2 cotter pins. Do Not connect the rod
end of the fold cylinders until they are charged
with oil. Follow the plumbing diagrams for the
lift and fold hydraulic systems, Section 2,
starting on page 28. Pay close attention to the
model and hydraulic options associated with
you machine. After the two systems are fully
plumbed, they need to be fully purged of air
before pinning cylinders to machine. To fully
purge a rephasing system, the rephasing port
(round knob on cylinder barrel) needs to be the
highest point of oil during purging (air bubbles
rise upward). With the lift and fold cylinders
unpinned and blocked up safely with rephrasing
port at top, cycle the cylinders for both systems
4 to 5 times from fully retracted to fully
extended while checking for leaks, lift cylinders
(2) will need to be set up on frame while
purging. You may then attach the cylinders in
their final locations.
Figure 12