-6-
142636 - Prong Picker (02-October-2019)
Preparation
The Rock Picker should always be parked on a level,
dry area that is free of debris and foreign objects.
Follow this procedure when attaching:
1. Clear the area of bystanders. Remove foreign
objects from machine and working area.
2. Start tractor and slowly back up to the hitch point.
3. Stop the tractor engine, place all controls in neutral,
set park brake and remove ignition key before
dismounting.
4. Use the hitch pole jack to raise or lower the pole to
align with the drawbar. Ensure that the rock picker
hitch pole is parallel to the ground. Refer to the
“Hitch Clevis Adjustments” section if needed.
5. Install the drawbar pin (with a mechanical retainer,
such as a Klik pin) and safety chain (between the
tractor drawbar and the hitch pole). Raise the hitch
jack and rotate it to its stowed position.
6. Connect the hydraulics.
NOTE: Connect the hoses that operate the grill lifting
cylinders to the hydraulic control operated nearest
to the operator’s seat, such that when the lever is
moved forward, the grill will lower.
7. Check that the transport pins are removed before
operation. If they are still installed, proceed to
remove them. Refer to the “Removing Transport Pins”
section if needed.
8. When unhooking from the tractor, reverse the above
procedure.
HOOK-UP / UNHOOKING
WHEN CONNECTING HYDRAULICS:
- Use a clean cloth or paper towel to clean the hose
couplers ends and also the area around the couplers
on the tractor.
- Remove the plastic plugs from the couplers (if
applicable) and insert the male ends.
- If the direction of motion is wrong after testing the
controls, reverse the couplers.
Bleeding Hydraulics: Occasionally air may become
trapped in the hydraulic circuit, making it necessary
to “bleed” the circuit. To perform this operation cycle
the hydraulics several times or, especially on older
tractors, temporarily loosen an easily accessible hose
fitting enough to allow any trapped air to escape while
cycling the hydraulics. Retighten fitting.
Follow this procedure when selecting and preparing
a tractor for use with the machine:
1. Use only a tractor of sufficient power and weight to
adequately handle the machine.
2. It is not recommended to use a tractor that is
equipped with duals. The right outer tire will drive
over the rocks, push them into the ground and make
them difficult to pick up with the grill.
3. It is recommended to pin the tractor draw bar totally
offset to the right hand side, to allow the picking grill
to clear the tractor wheels.
4. Use only a drawbar pin with provisions for a
mechanical retainer such as a Klik pin. Always
install the retainer.
5. Always attach a safety chain between the tractor
and the machine to prevent unexpected separation.
TRACTOR PREPARATION
WARNING:Use extreme care
when working around a high
pressure hydraulic system. Make
sure all connections are tight
and all components are in good
repair. Wear hand and eye
protection when searching for suspected leaks.
