The 6FY series is primary suitable to independent aplication and can aslo be used in small size flour mills .With comblined multimachine system. It mainly grinds wheat, corn, rice and sorghum, other grain seeds such as coffee, pepper, cocoa etc, and traditional Chinese mediches.

The machine has the following features:
1. It has reasonable and compact structure, sturdiness and durabillity, proper protection and nice appearance.
2. It is small in size, light in weight and easily transported and installed.
3. It is convenient to operate and maintain.
4. It has reliablity and sensitivity to operate because the manual spring lock system is linked with the feed control system.
5. The structure is simple, and it is easy to replace the screen cloth because the round sieve is adopted.
6. It consumes less energy and has low noise, stable and reliable functions.
Standard of the product:JB/T5680-91<<small roller flour-milling machine> >

In order to keep the machine in good conditions and prolong its service life, it should be frequently adjusted, maintained and repaired. Thus the operator should know well the following adjustment, maintenanc and repairmen of the whole set each unit.

DISASSEMBLY & ASSEMBLY OF THE GRINDING ROLLERS AND ADJUSTMENT OF THE CLEARANCE BETWEEN THEM
Disassembly of the grinding rollers:
From the left side of the machine, take away the protecition cover, v-belt and the link belt and pulley of the fast roller axis.
From the right side of the machine, take away the gear box and gears.
Take away the tie spring unit.
Take out the rollers from the grinding door carefully, pay attention to the protection of the teeth.
For 6FY-30 machine, take away the grinding door, the fixing bolts and pins of the upper and lower housings, then remove the upper housing.

Dismount of bearing bracker (Fig.2)
Take away screw7, bearing cover6, bolt 12 and shelves circle 14.
Loosen two locking nuts 8, hit cylinder pin 10, and take the case 9 round nut and screw away from grinding roller 1.
Rotate two M12 style bolts(fittings) inside the two bolt's hole of bearing bracket 4. You should rotate and replace it regularly, thus the bearing bracket 4 will be carried from grinding roller. (In order to prevent the grinding cover from crashing, the titled iron should be inserted between grinding cover 2 and grinding roller 1.)

Installation and adjustment of bearing bracket
Hit the rolling bearing 5 out of the bearing bracket 4 gently, clean the bearing (once per month), and apply some calcium grease enough.
Cover the sealed series 3 on the bearing bracket, install the fel inside the oil sealed groove, put it on the shaft of roller 1 and fixed roller 12, and make the shelves circle 14 tighten with the bolt 13.
Install the rolling bearing on the shaft of roller, use the iron pipe which diameter is bigger than the shaft of roller's to cover shaft of roller, and hit the iron pipe with hammer, and tehn the bearing will be put on the shaft of roller.
Install the screw cover 9 on the shaft of roller 1, hit it in the cylinder's pin 10, rotate the locking nut 8, and press closely the interal circle of bearing bracket 5, and then make the two locking nuts combine together.
Use the screw 7 to install the bearing cover 6 on the bearing has been finished, it should be flexible and convenient, otherwise the a forementioned steps should be chested, and make them be up to the standard.
Note: During the normal operation the flour-milling machine should be chested ofter, ensuring the lockingnut presses the internal circle of bearing closely, and the two lockingnuts are combined together.
Disassembly & assembly of the fast roller and the method of adjustment is simlar to the slow roller's, it can be performed referentially.
When the wiredrawing is being operated, the supporting location of bearing should be installed that part of internal bearing.
"a" part of the picture 3.

Assembly of the grinding rollers(Fig.2)
Procedures are completely contary to the above, then ,the surfaces are to be cleaned and coated with machine oil. Before installation the screw bolts should be stained with machine oil.

Teeth arrangement of the grinding rollers(Fig. 3)

The newly cut teeth of the grinding rollers should be arranged as blunt to blunt pattern(i.e the sharp horns of two roller facing the operator). After the teeth are worn or productivity is obviously deccreasing, either exchange the fast and slow rollers or reverse the slow roller making the teeth blunt-to-sharp, if the tooth points are wort further and the producitivity is decreasing badly, the teenth should become sharp-to-sharp by reversing the fast roller, when the tooth points become bigger surface and the productivity decreasas to less than 50kg/h and the power consumption is obviously increasing, the grainding roller should be cut. Usuallly after grinding 20000kg of flour the roller should be cut.

Adjustment of grinding roller clearance (Fig.4)

Inital adjustment:First shut the lock, then adjust the springs, making them shorten 8-10mm(i.e, the ring and the spring tube are at the same level, not pressing them too much). the pressure of the springs should be equal, check the roller clearance with eyes or with a 0.5-1.0mm steel plate.
Fine adjustment: Feed a piexe of 280mm wide paper, turn the handwheel(6) to adjust the clearance, then turn the v belt by hand, observing whether the tolling trace is even or not, if not, adjust the screw nut of the tie to make the fast and slow rollers parallel. after shutting the lock, the supporting ring of the tie should be moved slightly. Don't press it too much. the adjustment of the pressure of the spring can be obtained by adjustung the screw nut of the spring outside. Generally speaking, it is better to make the supporting ring and spring tube parallel.
Adjustment during operation: Check whether the crushed graing is even or not, if not, adjust the pressure of the spring(1).

FEED CONTROL(Fig.4)
Feed is controlled by the clearance between the feeding adjusting plate (3) and the slow roller (2) before starting the machine, adjust the sliding plate (10) into the proper position according to the required feed (in order to avoid obstructin because of excesssive feed, small preadjusted interval is recommended). Shut the lock after starting the machine. The feed control plate (3) will be in the preadjusted position due to the weight of the fed grain and the strength of the adjusting spring (9). if the feed control is not suitable, turn the miniadjusting handwheel (11) to maike it proper.
The screw (8) in the socket(7) is used to prevent grain from leaking and rubbing between the adjusting plate (3) and the slow roller (2) when the lock is open, preadjust the screw (8) in the proper position, making it touch the adjusting fork when the lock open.

ADJUSTMENT OF THE WALL PLATE AND THE LONGER PLATE IN TEH REAR (Fig.5)

1.long sliding plate in rear 2.left and right wall plate 3.screw nut 4.screw nut 5.crank

Adjustment of the Wall Plate: The wooden wall plate or nontoxic plastic (2) in the inner wall of the two ends of the shell is used to prevent grain from leaking from the two ends of the roller without being ground.
When the diameter of the roller bocoms smaller, relax the screw nut (4), remove the wall plate downwards, shorten the clearance between it and the rollers until the grain is not leaking, then, fasten the screw nut.
Adjustment of the longer sliding plate in the rear: In order to prevent grain from leaking and rollers from rubbing, adjust the longer sliding plate in the rear (1) whennever the rollers are cut or changed, While adjusting, keep the clearance between the longersilding plate in teh rear and the slow roller at 1.5-2mm by relaxing the screw nut (3) and turning the crank(5) then lock the screw nut fast..

THE TRANSMISSION ROUTE OF THE MACHINE AND THE ADJUSTMENT OF THE BELT
The transmission route(Fig.6)

	1.Motor
	2.Motor belt wheel
	3.Sieve belt wheel
	4.V belt
	5.Linking belt wheel
	6.Big gear
	7.Small gear
	8.Round sieve

The motor (1) drives the linking belt wheel (5) and makes the fast roller work, then the slow roller begins to work with the joining of gear (6) and gear (7) at the same time the v belt (4) and the linking belt wheel (5) drive the sieve belt wheel (3), making the sieve (8) work.
Replacement of the gear: After being cut many times, the diameter of the roller will become smaller and the centre distance of the follers will gradually become smaller, so it is necessary to replace the gear as shown in Table 2

Adjustment of the transmission Velt: The tension of the V-belt can be adjusted by loosing the screw nut of the motor socket and adjusting the screw in the motor sliding trace until it is in the proper position (the motor would heat if the belt is too loose) ,Then ,fasten the screw nut.
Adjustment of the round sieve V belt: The adjustment of the round sieve V belt can be obtained by moving the tension wheel, pay attention not to tightening it excessively to prevent from shortening its service okfe.

ROUND SIEVE
Structure of the round sieve: The round sieve consists of sieve cage, birstle brush, bran plat and housing. The sieve cage is suported by three screws M12 and lined with nylon screen cloth, When the sieve cover used for a length of time,6 nuts M12 can be djusted.
Replacement of the screen cloth: During replacing the screen cloth, firstly open the sievecover, take out the sieve cage, loose the wires in groove of the front and rear sieve eims, remove the old screen cloth and fix the new sieve covering on the screen cage with wires then adjust the nuts on lower ends of three screws M12 by hand to make the new covering tensioned, Finally tighten up the nuts on upper ends of three screws M12 by using of the spanner.
Attention: it shuld be neither too tight nor too loose, if too tight, it will affect the quality of the flour and shorten the service life of the screen, if too loose, the flour cna't be sifted cleanly.
Replacement of the brush: There are long holes in the brush in the sieve cage, if the screen can't be brushed, move the brush until it can brush it but hit too much, if it is brushed too much, its servise life will be shortened.

Lubrication of the gears:
Lubricating method: oil pool
Using No.45 machine oil
The oil level should be above the big gear 12-15 mm, all turning, moving and rubbing position of the machine shoud be sightly lubricated to keep the parts gubricious.

INSPECTION:
The clearance and dimensions of the machine have been adjusted into correct positions before the machine leaves the plant, Usually it not neccssary for the user to make any adjustment. But the user should see whether elements are missed and check as follows.
Inspection before operation:
Check the belt tightness and reciability of the safe units, check and see whether the screws in each positionis loose or not.
Check the lubrcation positions of each part.
Check and see wheter the roller clearance or not.
Inspection of free operation:
Start the motor and see whether the direction of the belt wheel is correct or not, and whether its speed fulfils the requirement.
Adjust the handwheel (6) and make the roller have some clearance, push the operating hadle (5) to shut the lock and see whether the clutch is normal or not.
Check and see whether there are cross motions or beating noise.
The free opertion usually lasts 30 minutes.
Inspection after operation
Check and see whether the goose feather brush is in good condition .
Check and see whether the screen is in good condition.

OPERATION:
After the machine is installed and adjusted, 20kg of bran should be ground first to get rid of dirt and rust, then start to grain.
Turn the miniadjusting handwheel to push the sliding plate into the desired postition.
Deliver grain into the funnel.
Turn on the button or three.
Slowly push the operatin handle into the operating position and check the conditions of the grain which phase lock to operate the machine, the big handwheel and minidjusting handwheel separately.

CLEARING:
After work, take away the bran from the machine, open the two grinding doors and windows to ventliate it, haust the hot air at the same time, operate the sieve for sexeveral minutes to clean the remaining fluor and bran.
After work, take the away the sieve cage and clean it up. Use a brush to clean the screen and the sieve, No flour should be left on them.

PIONTS FOR AFFENTION:
Carefully and slowly shut the lock, otherwise the parts may be damaged.
Be strictly on guard against any iron nail, metallic piece or hard stone getting into the machine.
After work, shut the lock immediately, don't push the roller to the working position to avoid free roller grinding.
In case any vulnerable parts are damaged, manufacture item accroding to the attached diagrams or buy new ones, if the user wants to buy the parts from our plant, please write and send money to us and we will supply the user with the required new ones.
This machine is mainly used to grain wheat, if corn is to be ground, the roller and the screen should be replaced by coarse ones.
This machine is not suitable to grinding soybean and other oiled granis.

COMMON TROUBLES AND EXCLUDING METHODS (Table 4)