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HYDRAULIC COMPONENTS
BUCKET MANIFOLD
The bucket manifold, a sequence valve, runs the two functions of the bucket. It both
raises and trips the bucket. It is centrally located on the upper cross tube.
CYLINDERS
The large and small cylinders are of similar design. They are single acting cylinders. Hydraulic
pressure from the towing vehicle raises the cylinders and the weight of the bucket and gravity lowers them.
Check for hydraulic leaks. There are seal kits to repair leaking cylinders. A WD-40 type penetrate can be
used to prevent the seals from drying out when the machine sits for the off-season. It can also lubricate the
rods when first operating a machine after it has sat for a period of time. Clean the breathers to improve
airflow in and out of the cylinders.
TO REPLACE THE CYLINDER SEALS:
Power wash or clean the cylinder before removing it from the
machine. Remove hose from the cylinder. Remove breather from the cylinder. Place the base of the cylinder
in a vice and position the cylinder horizontally. Use a bar through the piston rod hole to pull out the piston
and piston rod assembly.
Small Cylinder – Have someone compress the retaining ring at the top of the cylinder while you pull the
gland and rod assembly out of the cylinder. If the retaining ring is rusted, it is advisable to use penetrating oil
and clean up the ring and adjoining area. The retaining ring ends must touch in order to disassemble. Pull
out as straight as possible.
Large Cylinder - Unscrew the top with a spanner wrench. Remove the rod/piston assembly. Never try to slide
the gland over the end of the piston rod. To clean gland, remove nut on bottom of piston rod and
disassemble from that side.
Before removing seals, wipers and O-rings, take note of their orientation in the piston and gland. When
replacing felt wipers, make sure they have been saturated in oil. Coat all surfaces in oil before reassembly.
WHEELS SPINDLES AND AXLES
To check for play in the spindle/hubs elevate the wheels off of the ground
and check for play or looseness on the spindles. It is easier to determine if adjustment is necessary when
the tire/wheel is off the hub. If there is excessive play, the bearing and races should be inspected for
damage.
TO ADJUST WHEEL HUBS:
Remove the buddy hub/grease reservoir from the end of the hub. Clean away
the grease. Remove the cotter pin. Tighten the castle nut assembly until the play is gone. Reinsert the cotter
pin and grease reservoir. There is a blue collar on the grease reservoir that extends out when grease is
added. Add grease to the reservoir until the blue collar extends out. Check for tightness of the wheel cone
nuts. They should be tightened to 95 ft/lbs. Tires should be inflated to 18 PSI.
TINE REPLACEMENT
Replace tines as they break. Your machine can clean effectively with 20 or 30 tines
missing; however, it is advisable to replace them soon after they break. When a tine is broken, the work it
would normally do picking up material is transferred to the adjacent tines. This will overwork them and, in
turn, shorten their life. Never operate your machine with more than 50 broken tines. Tines will shorten as
they are used and should be replaced when they wear to within ½” of the bends.
The most convenient location for removing and replacing tines on the conveyor belts is at the back of the
machine with the bucket raised and secured with the safety support. Never work on the machine without the
safety support in place.
Position the belt. Rotate the conveyor belt slowly and stop it when the row on which you are going to replace
the tines is at the top, back of the machine and parallel to the ground.
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