4 — MAINTENANCE
4-7
Down Valve Operation Check and Adjustment
The adjustable down valve (13, Figure 4-5) is located in the base of the hydraulic cylin-
der. When properly adjusted, the down valve will allow the cylinder to fully retract in 35
to 39 seconds.
Adjust the down valve with the cylinder fully retracted. Loosen the lock nut and turn the
adjusting screw in to extend the retract time and out to shorten the retract time. Extend the
cylinder and note the time it takes to retract. Adjust as necessary to extend or shorten the
retract time. When the cylinder is retracting properly, hold the adjusting screw and tighten
the lock nut.
Hydraulic Cylinder Repair
CAUTION
Removing the hydraulic cylinder from the Odyssey Lift requires major disassem-
bly of the unit. Contact Bil-Jax for assistance before removing the hydraulic cylin-
der from the unit.
Hydraulic Cylinder Removal
It is recommended that Bil-Jax be contacted for assistance before removing the hydraulic
cylinder.
WARNING
Keep hands and feet away from elevated masts at all times.
1. Raise lift far enough to place scrap 4 x 4 wood block(s) under the main (welded)
mast. Lower lift down onto the block(s) and turn off the main power.
2. Remove mounting bolt (10), washers (9), and nut (8) securing the top of the hy-
draulic cylinder rod to the main (welded) mast.
3. Open the emergency lowering valve (See Figure 3-6) and use a pry bar to lower
the cylinder rod down from the main (welded) mast connection.
4. Be sure cylinder is retracted and pressure is released from the system. Place a
pan underneath the hydraulic cylinder to catch the hydraulic oil.
5. Disconnect the hydraulic hose from the bottom of the cylinder and drain the re-
maining hydraulic oil.
6. Remove four bolts (2, Figure 6-3), lock washes (3), and two cylinder brackets
(4) securing cylinder (7) to the base. Lift the cylinder to remove it from the
mounts on the base unit.
7. After maintenance has been performed on the hydraulic cylinder, reinstall the
cylinder in the mounts on the base unit, reconnect the hydraulic hose, and close
the emergency lowering valve. Turn on the main power, raise the lift until the
cylinder rod slides back into the main (welded) mast connection, and reinstall the
mounting bolt, washers, and nut.
Hydraulic Cylinder Repair Procedure
Perform the following procedure to repair and maintain the hydraulic lift cylinder. Refer
to Figure 4-5. It is recommend that whenever the hydraulic cylinder is disassembled that
all seals be replaced; order seal kit B02-13-0099.
