Hardi Navigator trailed sprayer service schedule

1. Grease the breakaway clutch.
2. Every 40 hours, check the clutch bolts are at 40 ft·lb (55 Nm).
3. To change the breakaway force, slacken the jam nut, tighten the adjusting nut to stiffen the clutch, then retighten the jam nut. Grease the clutch before adjusting.

Tools: Grease gun, Torque wrench (55 Nm), Spring balance

1. Wear gloves and protective clothing.
2. CycloneFilter: turn the pressure SmartValve to an unused function or to the tank cleaning nozzles first, then unscrew the lid. If you do not, spray liquid can hit you.
3. EasyClean: turn the lid anticlockwise, lift out the filter, turn the locks outwards to separate it from the lid, and clean it and the housing.
4. In-line filters: unscrew the filter bowl and clean the filter. Nozzle filters sit inside the nozzles; check and clean them.
5. Grease the O-rings before reassembly and make sure the filter catches its guide.
6. Close the lid fully. Fill with clean water, operate all functions and check for leaks at higher pressure than normal. Look at the nozzle spray patterns with clean water.

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

1. Stop the pump. It must never be greased while running.
2. Calibrate your grease gun: pump 10 full strokes onto paper, weigh it and divide by 10 to find the grease per stroke.
3. Clean the nipples. Nipple head is DIN 71412, 6.5 mm.
4. Give each pump lubrication point 1 oz (30 g) of grease.
5. After dismantling the pump for a diaphragm job, give each lubrication point 7 oz (200 g) instead.

Tools: Grease gun (calibrated, see steps), Scales or kitchen paper, Rags

1. Check that the guard and chains are whole and working. Replace any damaged part.
2. Grease the shaft at the points shown in the lubrication plan and on the shaft's own label.
3. At 1,000 hours, change the protection tube nylon bearings as the shaft maker describes.

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 pressures from the table in your instruction book. 3100-6200 examples: 320/90 R46 single wheel 36 to 52 psi, 380/90 R46 22 to 48 psi, depending on model.
3. Never inflate above the table figure.

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

1. Look over the whole hydraulic circuit for leaks and repair any.
2. Check every hose and tube for damage and secure fitting. Replace damaged ones.
3. Hoses for the boom lifting device must be replaced after 5 years of use.
4. Accumulators (ParaLift) may be refilled with nitrogen. They can hold oil under pressure, so take the pressure off first.

Tools: Spanners, Torch, Gloves and eye protection

1. Chock the other wheel, jack the sprayer up and support it on axle stands. Never rely on the jack alone.
2. At 250 hours: rock the wheel to feel for play. If there is play, remove the hub cap and split pin, tighten the castle nut until there is slight resistance, then back off to the first notch that lines up with the pin hole. Fit a new split pin and the hub cap.
3. At 1,000 hours: remove the wheel, hub cap, split pin and nut, pull the hub, take out the bearings, clean them and replace if worn.
4. Pack the bearings with fresh grease, fit a new seal and refit. Set the nut as above, fit a new split pin, fill the hub cap with fresh grease and refit it.
5. If you are not confident, have your HARDI dealer do it.

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

1. Connect to the tractor and unfold the boom to working position.
2. Lift the boom centre frame and support it until the load is off the parallelogram arms.
3. Take out the screws and pins on the upper arms, replace the bushings, and refit.
4. Do the same on the lower arms, then grease every nipple.

Tools: Lifting gear, Spanners, Grease gun

1. Clean the sprayer fully inside and out, flush all valves, hoses and extras with clean water so no chemical is left.
2. Replace damaged seals and repair leaks. Empty the sprayer, run the pump a few minutes and drain the rinse tank, running until air comes out of all nozzles.
3. Pour in about 50 L of antifreeze mix (1/3 antifreeze, 2/3 water). With the pump running, operate every valve, the operating unit and chemical inductor, and spray it through the nozzles. A FlexCapacity pump must also be run.
4. Lubricate every lubrication point at the intervals in the plan. Touch up paint chips.
5. Take off the glycerine pressure gauges and store them upright out of frost.
6. Wipe a thin film of anti-corrosion oil over metal parts, not rubber.
7. Fold the boom to transport position and release hydraulic pressure. Store plugs in dry bags, take the control box and display off the tractor and keep them indoors, and put dust caps on the couplers.
8. Grease any ram rods not fully retracted. Chock the wheels so the tyres are not distorted and cover the sprayer with a tarpaulin that lets air circulate.

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

1. Take off the tarpaulin and remove the supports from under the axle. Set the tyre pressure.
2. Wipe the grease off the hydraulic ram rods. Refit the pressure gauges using Teflon tape.
3. Connect to the tractor, hydraulics and electrics, and check all hydraulic and electric functions.
4. Empty the leftover antifreeze from the tank, rinse the whole circuit with clean water, then fill with clean water and check every function.
5. Check the date of your sprayer test certificate and book the test if it is due.

Tools: Water, Tyre gauge, Rags

1. Buy the kit for your pump model. Look at the pump plate.
2. 364 / 464: pull off the plastic covers, undo the 4 head bolts and take off each head. Note the valve positions, then change the valves, using new gaskets.
3. Undo the diaphragm bolt and washer, change the diaphragm, check the drain hole at the bottom of the pump is clear, and put a little pump grease between the diaphragm and the connecting rod washer.
4. Turn the crankshaft so each diaphragm is between centre and top of its stroke before tightening the head bolts. If it is at the bottom of its stroke the edge will not seal and the diaphragm is ruined.
5. 364 / 464 torque: head bolts 67 ft·lb (90 Nm), diaphragm bolt 67 ft·lb (90 Nm). Use Loctite 262 on the diaphragm bolt of 1000 rpm pumps.
6. 363 / 463 torque (Navigator 3000 book): 463 diaphragm cover 65 ft·lb (90 Nm) and diaphragm bolt 60 ft·lb (80 Nm); 363 diaphragm cover 50 ft·lb (70 Nm) and bolt 45 ft·lb (60 Nm). 1303: valve cover 45 ft·lb (60 Nm), diaphragm cover 50 ft·lb (70 Nm), diaphragm bolt 45 ft·lb (60 Nm).
7. If liquid has reached the crankcase, re-grease the pump thoroughly. Refit the covers.

Tools: Torque wrench (up to 100 Nm), Sockets, Lifting eye and tackle (pump about 75 kg), Grease gun

1. With the pump running, turn the pressure SmartValve to an unused function (or TurboFiller without using it) so the safety valve opens briefly.
2. If the main tank drain valve leaks: empty and clean the tank, close the valve, pull out the clip, pull down the connecting piece and take the valve assembly out from underneath. Never go inside the tank.
3. Replace the seal and fit a new valve seat, lubricate the O-rings and refit the clip. Test with clean water before filling with chemicals.

Tools: Pliers, Eye and face protection