Controlled Products Systems Group HRG 220-A ST - Manual (Page 72)

Installation and Maintenance Manual
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5. Alleviate the possibility of the bearing falling into the post’s interior by using two self-tapping
screws and some string. Fasten a separate strand to each screw. Turn the screw into each half of
the UHMV plastic bearing until each screw is secure.
6. Remove the four screws in the outer post that hold the worn half of the bearing in place. Pull on
the string to remove the bearing from inside the post, and then perform the same step for the
other half of the bearing.
7. Use the screw and string technique on the two new bearing halves. Make sure the notch in the
bearing is aligned with the post’s weld seam.
8. Replace both bearing halves and use the fasteners removed in step 6 to hold them in place. Do
not fully tighten the fasteners until the shims have been properly installed.
9. Shim each side evenly so the distance between the outside edge of the post and the inner tube is
equal to ¾-inch (19mm). Make sure the bearing halves are centered in the post and the gap
surrounding the inner tube is consistent.
10. Remove the block from the gate.
11. Turn the power back on.
12. Open the gate to access the lower bearing.
13. Repeat steps 2 through 11 to replace the lower bearing.
Hydraulic System
Fluid Level: Under normal conditions, hydraulic systems do not consume oil. Before adding any oil,
check the system thoroughly for leaks. Remove the bright metal plug in the tank, fill to plug level, then
replace plug. We recommend our Uniflow hydraulic oil which is sold in one-gallon containers by our
distributors. Refer to the HySecurity Price Book for the appropriate part number.
IMPORTANT: Never use brake fluid. It will severely damage the entire hydraulic system. Use of
any oil other than Uniflow oil may void the operator warranty.
Look for leaks:
Occasionally there may be slight seeping at the fittings after some usage. Tightening of
the fittings will usually correct the problem. If the leaking persists, replace "O" rings, fittings or hoses, if
required. No further leaks should occur.
Oil Change:
A hydraulic system does not foul its oil, unlike a gas engine, so oil changes do not need to
be frequent. Oil breakdown caused by heat is the main concern. If the unit is subjected to high use,
especially in a warm climate, change the oil more frequently. In general, we recommend draining the
reservoir and replacing the oil at five-year intervals.
To change the hydraulic oil, remove the reservoir from the pump unit and completely, empty it. Wipe the
reservoir can clean and clean any debris from the pickup screen before re-assembling. Refill with new
Uniflow hydraulic oil (available from your distributor). To avoid overfilling, fill only through removable plug
near the top of the tank. Slowly pour the oil into the tank until the oil is within one inch of the filler port.
Replace the plug and wipe up any spilled oil. If any oil is allowed to remain, it will dry to a very sticky and
messy consistency.
Cold Weather:
1. Check that your reservoir is filled with our Uniflow high performance oil, which is rated to -40 F.
2. Ice can partly or totally jam gate operation. In severe weather inspect the gate for excessive build-
ups of snow and Ice.