Hardi Commander 4500 / 5500 / 7000 trailed sprayer service schedule

1. Wear gloves and protective clothing.
2. CycloneFilter: turn the pressure SmartValve to an unused function or the tank cleaning nozzles first, then unscrew the lid.
3. EasyClean: turn the lid anticlockwise, lift out the filter, separate it from the lid and clean it.
4. In-line and nozzle filters: unscrew the bowl or nozzle and clean the filter.
5. Grease the O-rings, reassemble and check with clean water for leaks and a good nozzle spray pattern.

Tools: Soft brush, Gloves and protective clothing, Clean water

1. Stop the pump. It must not run while it is being greased.
2. Clean the nipples and give each pump lubrication point 1 oz (30 g) of grease.
3. Check your grease gun delivers what you think: weigh 10 strokes and divide by 10.

Tools: Grease gun, Rags

1. Check the guard and chains and replace any damaged part.
2. Grease the shaft as the plan and the shaft label say.
3. At 1,000 hours, change the nylon bearings in the protection tubes.

Tools: Grease gun, Shaft maker's instruction book

1. Tighten the wheel nuts in the numbered sequence to 250 ft·lb (340 Nm).
2. Set tyre pressure from the table in your instruction book and never exceed it.

Tools: Torque wrench (up to 340 Nm), Tyre gauge, Wheel chocks

1. Check the steering section for play.
2. Retighten the nuts on both sides to 185 ft·lb (250 Nm).
3. Make sure the split pin is fitted at the end of the big bolts.

Tools: Torque wrench (250 Nm), Pliers

1. Check the hydraulic circuit for leaks and repair any.
2. Check all hoses and tubes for damage and secure fitting, and replace any damaged ones. Replace the boom lifting hoses after 5 years.
3. Refill the nitrogen accumulators if fitted. They can hold oil under pressure, so take the pressure off first.

Tools: Spanners, Torch, Gloves and eye protection

1. Chock, jack up and support the sprayer on axle stands.
2. At 250 hours: rock the wheel for play. If there is any, tighten the castle nut to slight resistance, back off to the first notch that lines up with the pin hole, and fit a new split pin.
3. At 1,000 hours: pull the hub, clean and check the bearings, repack with fresh grease, fit a new seal and set the nut as above. Fill the hub cap with fresh grease.
4. If you are not confident, have your HARDI dealer do it.

Tools: Jack and axle stands, Wheel chocks, Spanners, Wheel puller, Degreaser

1. Clean the sprayer fully inside and out and flush all valves, hoses and extras with clean water.
2. Empty the sprayer, run the pump until air comes from all nozzles, and drain the rinse tank.
3. Put about 50 L of antifreeze mix (1/3 antifreeze, 2/3 water) through the pump, valves, inductor and nozzles.
4. Lubricate every lubrication point, touch up paint, store the glycerine gauges upright out of frost and oil bare metal with anti-corrosion oil.
5. Fold the boom, release hydraulic pressure, bag the plugs, take the control box indoors, fit dust caps to couplers and grease unretracted ram rods.
6. Chock the wheels and cover the sprayer with a tarpaulin that lets air through.

Tools: Water and detergent, Grease gun, Plastic bags, Tarpaulin

1. Remove the cover and wheel supports and set the tyre pressure.
2. Wipe grease off the ram rods and refit the pressure gauges with Teflon tape.
3. Connect to the tractor and check all hydraulic and electric functions.
4. Empty out any leftover antifreeze, rinse with clean water, fill and check all functions.
5. Check the date on your sprayer test certificate and book the test if it is due.

Tools: Water, Tyre gauge

1. 464: pull off the plastic covers, undo the head bolts and change the valves with new gaskets, noting each valve's orientation.
2. Change the diaphragms, check the drain hole at the bottom of the pump is clear, and put a little pump grease under each diaphragm.
3. Turn the crankshaft so each diaphragm is between centre and top before tightening the head bolts.
4. Torque for both 463 and 464: diaphragm cover / head bolts 67 ft·lb (90 Nm) and diaphragm bolt 67 ft·lb (90 Nm). Use Loctite 262 on the diaphragm bolt of 1000 rpm pumps.
5. On the 463, a special white-flap valve goes in the two upper inlets; the rest have black flaps.
6. Re-grease the pump thoroughly after reassembly. The 464 takes 7 oz (200 g) per point.

Tools: Torque wrench (up to 100 Nm), Sockets, Grease gun