Great Plains PH-20 Operator Manual - Manual (Page 33)

31
Section 5 Maintenance and Lubrication
12/29/2011 PH-15, PH-20, PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365M
Great Plains Mfg., Inc.
Section 5
Maintenance and Lubrication
Maintenance
You could be severely injured or killed by being crushed by the
falling implement. Always have transport locks in place and
frame sufficiently blocked up when working on implement.
This hitch could have negative tongue weight when hitched to a
three-point drill in the raised position. Negative tongue weight
will cause the unsecured hitch tongue to raise suddenly and
could cause injury or death. Always lower drill before unhook-
ing hitch from tractor.
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin. Check all hydraulic lines and fittings before
applying pressure. Fluid escaping from a very small hole can be
almost invisible. Use paper or cardboard, not body parts, and
wear heavy gloves to check for suspected leaks. If injured, seek
medical assistance from a doctor that is familiar with this type
of injury. Foreign fluids in the tissue must be surgically removed
within a few hours or gangrene will result.
Coulter and opener disks may be sharp enough to cut flesh. Be
careful when working around coulter and opener disks.
Proper servicing and maintenance is the key to long imple-
ment life. With careful and systematic inspection, you can
avoid costly maintenance, downtime and repair.
Always turn off and remove tractor key before making any
adjustments or performing any maintenance.
1. After using implement for several hours, check all
bolts to be sure they are tight. Check all valves, fit-
tings, hose clamps and plugs to be sure they are tight.
2. Inflate tires as specified on Tire Inflation Chart, “Ap-
pendix,” page 40.
3. Lubricate hitch as listed under Lubrication, page 33.
4. Replace any worn, damaged or illegible safety decals.
Obtain new decals from your Great Plains dealer. Re-
fer to Safety Decals, “Important Safety Information,”
page 4, for decal placement.
5. Check hitch safety chain. Make sure chain is properly
attached to hitch. Inspect chain for wear or other dam-
age. Replace immediately if needed.
6. Check fertilizer drive chains for wear. Replace if nec-
essary. Adjust idlers to remove excess slack from
chains.
Marker Maintenance
The marker arm is attached to marker body with a 3/8-
inch, grade 2, shear bolt. If shear bolt breaks, replace it
with a grade 2 bolt.
If grease-seal cap for marker disk bearings is damaged or
missing, disassemble and clean hub. Repack with grease
and install a new seal or grease cap.
Fertilizer Cleanout
Some chemicals will cause serious burns, lung damage and
death. Avoid contact with skin or eyes. Wear proper protective
equipment as required by chemical manufacturer. Avoid pro-
longed breathing of chemical fumes. Wear respirator as re-
quired by chemical manufacturer. Seek medical assistance
immediately if an accident occurs. Know what to do in case of
an accident.
Proper and regular cleanout is the best way to prolong pis-
ton-pump life. Do not allow air to enter the pump, even for
short periods of time. Air in the pump will cause rapid and
severe corrosion.
After each day’s use:
1.
Flush tanks, nozzles, hoses and pump with clean wa-
ter. Do not allow air into the pump.
2. Do not drain the pump. Leave fresh water in pump
overnight.
3. Wash any components that may have been exposed
to fertilizer.
For two- to three-week storage:
After flushing fertilizer system with water, immediately fill
all pump passages with motor oil. Replace pump manifold
and plug pump inlet and outlet with a stopper or oily rag.