Great Plains TM700 Operator Manual - Manual (Page 56)

Tractor Mount Sprayer
500-052M 5/13/2003
54
Maintenance and Lubrication
Check the conditions of hoses and connections fre-
quently. Release the system pressure BEFORE working
on the sprayer. To release the pressure flip the boom
section switches on an off without the pump running.
ALWAYS wear rubber gloves when making repairs or
adjustments. Make sure all "Personal Safety Equip-
ment" {gloves, goggles, etc.} listed on Page 5, are
stored in an easily accessible place but protected from
potential contamination from dust or chemicals.
Check the sprayer for any loose bolts, pins, and hose
clamps.
Check the hoses, pumps, valves, and fittings for any
leaks.
Inspect all parts of the sprayer for wear and rust. Repair
and paint parts as necessary.
Pump Maintenance & Repair
This Great Plains pump is designed for long life and ser-
vice. Through the years, there may be a need to replace
the mechanical seal or service some component of the
pump. A mechanical seal may weep slightly, but if it
starts to drip, the pump will have to be disassembled.
Before you disassemble the pump, be sure to wash it out
with fresh water.
The following is an instruction list for how to reassemble
the pump after it has been disassembled and repaired.
Refer to the parts manual for the components of the
pump.
Refer to Figure 14
If your pump is leaking, before you remove it from the
sprayer, run the pump with adequate water in the tank to
diagnose the actual pump problem. If fluid leaks out be-
tween the front suction housing (5) and the rear volute
housing (8), the housing gasket may be dried out. Give
the gasket (6) adequate time to absorb moisture and
swell up. If necessary, retighten the volute housing (8) by
alternating on opposite sides until all nuts (9) are
torqued to 16 - 18 ft.-lbs. It is a good practice to apply
grease to both sides of the gasket (6) to prevent
shrinkage.
If seal replacement is required:
1. Disassemble pump and clean all components.
2. Assemble the ceramic ring seat of the mechanical
seal (7) into the volute housing (8) of the pump.
Make sure the ceramic seat is positioned square
into the volute housing.
Maintenance
Proper servicing and adjustment is the key to the long
life of any farm implement. With careful and systematic
inspection, you can avoid costly maintenance, time and
repair.
Equipment Cleanup
Nozzles should be cleaned with a low pressure {less
than 30 psi} air hose, and periodically replaced. Haul a
supply tank of water so you can clean the spray tank and
applicator out in the field. NEVER wash tank out in the
yard or at a car wash. Rinse out tank and spray the rinse
water on the last field that was sprayed.
Dispose of leftover chemical in the same manner de-
scribed on the manufacturer’s label of the chemical last
used in the sprayer. Rinse out the tank and spray the
rinse water on the last field that was sprayed.
Flush the sprayer with fresh water and spray the water in
the field that was last sprayed. While the sprayer is being
flushed at the field, turn the boom section switches "on"
to flush the nozzles, then turn them "off" to flush out the
throttling valves and bypass lines {if equipped}. Repeat
this procedure several times. Periodically clean each
throttling valve by unscrewing its gray knob until it stops.
Flush it with the fresh water by operating the pump with
the boom section switches "off". Reset the solenoid
throttling valves as described in "Solenoid Throttling
Valve" on Page 51.
The boom pressure gauge has a ball valve that is used
to clean out any chemical that has built up under the
gauge protector. With the sprayer tank full of water and
the pump running, open the ball valve and allow the wa-
ter to run in a bucket. After the liquid coming out of the
hose turns clear, turn off the ball valve and dump the
contents of the bucket into the sprayer tank.
General Information
If equipment is to be used in freezing or near freezing
conditions, protect pump and plumbing system by thor-
oughly draining liquid and pumping antifreeze {Great
Plains strongly recommends the use of recreational ve-
hicle antifreeze} solution through the plumbing system.
Before working on, servicing or making adjustments on
sprayer, ALWAYS disengage power, shut off tractor en-
gine, make sure all moving parts have stopped, and all
pressure in the system is relieved.