Due to the rotary situation, abrasion and load change of mini tiller, bolts will become loose and parts will be fretted during the working period. These changes will destroy the proper working state of mini tiller, create abnormal fitting clearance, degrade output of diesel engine, increase oil consumption, lead to the maladjustment of its spare parts, increase malfunction of mini tiller. All these will seriously affect the normal working efficiency of mini tiller. To decrease the frequency of the above-mentioned accidents, prevention of maintenance work must be done strictly and regularly to keep the mini tiller in a good technical state and prolong its life.
ⅠRunning-in of mini tiller:
1. As for running-in of mini tiller, please refer to its instruction.
2. If the mini tiller is new or repaired heavily, it should work with no- load for one hour. After the mini tiller works with light load for five hours, all lube in gear box and crankcase of diesel engine should be drained immediately. Afterwards, you should refuel adequate clean oil, run the mini tiller at idle speed for 3 to 5 minutes to wash it , then drain oil completely. Please refuel lube and carry out running-in for 4 hours according to the forth procedure of chapter3. By doing so, the mini tiller can work in normal condition.
ⅡTechnical maintenance of mini tiller
A. Every-time maintenance (before work and after work ):
1. Listen and check if there is malfunction of every part (such as abnormal noise, overheat, loose screw and so on).
2. Check if there is oil leakage of diesel engine, gear box and running gear.
3. Check if the oil level of diesel engine and gear box is between the upper and lower line of dipstick.
4. Clean the whole machine and spare parts with mud, grass and oil stain regularly.
5. Make tilling notes.
B. Primary maintenance (per 150 hours)
6. Carry out maintenance work based on all contents of every- time maintenance.
7. Wash gear box, running gearbox and change lube.
8. Check and adjust clutch, shift system and back shift system.
C. Secondary maintenance (per 800 hours)
9. Carry out maintenance work based on all contents of primary maintenance.
10. Check all gears and bearings. If they are fretted severely, please change them with new parts.
11. Check other parts of mini tiller, such as: rotary blades or bolts and so on. If there is damage, please change them with new parts.
D. Technical inspection (per 1500-2000 hours)
12. Take part the whole machine in the special maintenance station, wash and check it. If the spare parts are severely fretted, they must be changed or repaired according to the situation.
13. Invite special workers to check friction plate and clutch.
E. As for the maintenance of diesel engine, please refer to its instruction.
Ⅲ Technical maintenance table of mini tiller(mark”0” indicates the maintenance contents)
 

Working intervals and maintenance contents	Every day	Work with half load for 8 hours	Work for one month or 20 hours	Work for 3 months or 150 hours	Every year or 1000 hours	Per 2 years or 2000 hours
Check and tighten nuts, bolts	0
Check and refuel lube	0
Check and change lube		0(first time)	0(second time)	0(third time or more)
Check if there is oil leakage	0
Clean mud, grass and oil stain	0
Debug malfunction	0
Adjust operation parts	0
Friction plate of clutch						0
Gears and bearings					0

Ⅳ.Long-period storage of mini tiller
   When mini tiller needs storing for a long period, the following measures should be taken to prevent tarnishing.
1. Keep diesel engine with seal according to its instruction.
2. Wash oil stain and clean dust on the machine.
3. Drain lube in the gear box and refuel new oil.
4. Paint pickling oil on non-aluminum where there is no paint.
5. Store the mini tiller in the dry, safe place where there is enough aeration.
6. Properly keep the attaching tools, certificates of conformity and instruction of mini tiller.