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MAINTENANCE AFTER THE FIRST 100 SERVICE
HOURS (FOR NEW MACHINE)

 1. Replacing the line filter element

Remove the filter with a filter wrench and replace
it with new one.

Before replacing the filter, be sure to open the
hydraulic oil tank to bleed the filter.

 2. Cleaning the pilot filter

Remove the plug from under the floor plate with a
wrench (width across flats:27 mm) and pull out the
element.
Clean the element with cleaning oil and remove all
dirt.

 3. Cleaning the suction filter

Remove the suction filter from the hydraulic oil
tank. Clean the filter with diesel fuel or kerosene
to remove the dirt. If the strainer is broken,
replace it with new one.

To reinstall the lid, set the O-ring securely into the
flange groove in order to prevent a leak of hydraulic
oil.

Do not perform this operation while the hydraulic oil
is still hot, to avoid being burned.

IMPORTANT

IMPORTANT

Pilot filter

- 54 -

!

CAUTION

Line filter

Suction filter

Summary of Contents for HY2270001

Page 1: ...OPERATION MANUAL SER NO HY2270001 ...

Page 2: ...https marengine com r22 7 excavator ...

Page 3: ...tor operation Keep this operation manual in the excavator at any time to ensure readily access to it in case a need for it arises Be sure to hand over this operation manual to the new owner if the ownership of the excavator is to be transferred Make every possible effort to ensure proper and safety operation of the excavator m Note that a portion of the contents of this instruction manual may diff...

Page 4: ...njury of machine damage if the instruction is not observed IMPORTANT This symbol shows a hazard that can cause damages to the excavator or reduce its service life if the instruction is not observed N m This symbol shows the tightening torque for a given bolt that needs to be strictly observed during the assembly This symbol shows related matters or the referring page This symbol shows the amount o...

Page 5: ......

Page 6: ... INSPECTION AND MAINTENANCE Ordering Parts and Servicing Guidelines 47 Inspections 48 Maintenance after the First 50 Service Hours New Machine 53 Maintenance after the First 100 Service Hours New Machine 54 Maintenance Every 50 Service Hours 55 Maintenance Every 100 Service Hours 57 Maintenance Every 250 Service Hours 58 Maintenance Every 500 Service Hours 59 Maintenance Every 1000 Service Hours 6...

Page 7: ...27 mm and pull out the element Clean the element with cleaning oil and remove all dirt 3 Cleaning the suction filter Remove the suction filter from the hydraulic oil tank Clean the filter with diesel fuel or kerosene to remove the dirt If the strainer is broken replace it with new one To reinstall the lid set the O ring securely into the flange groove in order to prevent a leak of hydraulic oil Do...

Page 8: ...attery electrolyte in each block is between the upper and lower limits 2 If it is under the lower limit take off the cap to add battery electrolyte or distilled water to the upper limit in each block When inspecting the batteries be sure to stop the engine When dealing with the batteries you must put on a protect glasses Deluted sulfuric acid as electrolyte is dangerous substance Be careful not to...

Page 9: ... connecting the terminals 4 Greasing slew bearing Use a grease gun to lubricate the grease nipples of screw bearing After working in water give grease without fail 5 Eliminating the sediment in the fuel tank Open the drain cock to eliminate the sediment and drain the water It is effective to do this before starting the engine 6 Checking the fuel tank strainer Remove the tank cap remove any loose d...

Page 10: ... the dust cover Inspect and clean the ele ment For details refer to page 65 After stopping the engine clean them 2 Cleaning the fuel filter element You can take out the element by removing the filter ring nut Clean the filter with diesel fuel Air cleaner element WARNING Fuel filter 57 ...

Page 11: ...amount of engine oil through the oil supply port 6 Start and idle the engine for several minutes to check for oil leakage After the engine is stopped check the oil level using the level gauge If short add oil 3 5 Perform this operation on level ground Make sure that dust does not enter through the oil supply port 2 Eliminating the sediment in the hydraulic oil tank Open the drain plug to eliminate...

Page 12: ... suction filter from the hydraulic oil tank Clean the filter with diesel fuel or kerosene to remove the dirt If the strainer is broken replace it with new one To reinstall the lid set the O ring securely into the flange groove in order to prevent a leak of hydrau lic oil Do not perform this operation while the hydraulic oil is still hot to avoid being burned 4 Replacing the line filter element Rem...

Page 13: ...plate with a wrench width across flats 27mm and pull out the element Clean the element with cleaning oil and remove all dirt 6 Replacing air cleaner element Clean a dust cover Replace elements For details refer to page 65 After stopping the engine clean them WARNING Pilot filter Air cleaner element 60 ...

Page 14: ...or details refer to page 66 2 Replacing the Hydraulic Oil Remove the drain plug and replace all hydraulic oil Amount of hydraulic oil 33 3 Replacing the Lubricating Oil in the Travel Speed Reduction Gear Remove the blind plug in the speed reduction gear cover and replace the lubricating oil For details refer to page 71 61 Cap Drain plug ...

Page 15: ...the negative pressure 3 Procedure 1 Remove the cover of the hydraulic oil tank If the machine has a plug on it it is advisable to remove only the plug 2 Start the engine and extend all cylinders as the Figure 2 Hydraulic oil go to the cylinders to be the lowest oil level in the tank 3 At the condition of ii tighten the cover or plug of the tank Work with your caution the dozer cylinder is also ext...

Page 16: ... 63 Figure 2 ...

Page 17: ...r using up the fuel bleed the air in according to the following procedure 1 Fully fill the fuel tank 2 Open the cock of water sedimentor 3 Turning the starter switch ON automatically bleeds the air The air can ordinarily be bled in about one minute when the fuel filter is empty IMPORTANT Fuel filter Water sedimentor Fuel pump Cock Water sedimentor Open Close 64 ...

Page 18: ... is soiled with black carbon or soot remove it with cleaning liquid 1 For the cleaning liquid dissolve 300g 10 6oz of air element cleaner ND1500 into 20 of water Immerse the air cleaner element for about 20 minutes 2 With the dust cap removed flush the air cleaner element using tap water 3 After cleaning let the element dry in a place where air circulates freely The standard inspection is every 10...

Page 19: ... 5 Stop the engine and open the drain plug to clean the inside of radiator with water Close the drain plug and supply cooling water to the specified level Cleaning fluid 1 dissolve Sodium bisulfite of 250g in water of 1 Neutralization fluid 2 dissolve Sodium carbonate of 6g in water of 1 Anti freeze should be fully mixed with the water in another vessel prior to feeding it in the radiator If you d...

Page 20: ...is increased resulting in the reduction of travelling ability 2 If the crawler is too slack it may slip off the sprocket Resistance increases when going in reverse and the travelling ability of the machine is reduced Inspection 1 Insert a grease gun into the grease nipple and pour the grease to strain the crawler 2 For loosening the crawler loosening the car tridge valve the grease in the cylinder...

Page 21: ...t The cover is provided with three blind plugs With the cover set vertically against the ground as shown in the figure the centre port is for inspection and the bottom port for draining and the top port for supplying 1 First remove the plugs from the oil intake and oil quantity check port with an Allen wrench 2 Add lubricating oil through the oil intake until the oil comes out of oil quantity chec...

Page 22: ... and replacing fuel filter element Inspecting water sedimentor Adding and replacing cooling water Cleaning radiator fin Inspecting cleaning and replacing air cleaner element Inspecting and adjusting tension of fan belt Period Item Every 500 hours Every 1000 hours Every 2000 hours Remarks Drain water and sediment Replace every sp ring and autumn Check before start up First 50 hours First 100 hours ...

Page 23: ...it reduction gears Inspecting the joint for looseness and oil leaks Supplying or replacing the hydraulic oil Replacing the line filter element Cleaning or replacing the suction filter Check wiring for non connection short circuit loose con nections Inspecting the electrical parts Inspecting the battery fluid level Item Period Elecric system Hydraulic system Attachment Every 2000 hours Every 1000 h...

Page 24: ...LUBRICANT CASTROL ESSO 1 Engine Oil RX SUPER 10W 30 LUBE MHX 10W 30 2 Gear Oil EPX 85W 140 GX 85W 140 3 Hydraulic Oil HYSPIN AWH M 46 UNIVIS N46 4 Cup Grease SPHEEROL LEP 2 BEACAN EP 2 5 Antifreeze Anti Freeze Anti Freeze 6 Diesel Fuel German Hydraulic oil is Univis J32 Use class CD engine oil API Service Classification 71 ...

Page 25: ...ng point Lubricant oil amount lit Lubricating interval Every hours Index number on table See page 71 The daily lubricating point is marked with and the additional lubricating point is marked with Fuel tank 6 Hydraulic tank 3 29 33 Engine 1 3 5 Slew gear 4 Swing cylinder head pin 4 72 ...

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