LONCIN 850 Mini Tiller User manual

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Foreword
Thank you for purchasing our mini tiller
It is the accelerator for your building of a richer life.
With a small size, a light weight, multiple functions, high rotary tilling efficiency, ability to work on
mountains, in waters, to cross ridges of fields and ditches, and easy transport and operation of turning around,
this model of mini tiller is especially suitable for work in mountain areas, hilly areas, arid fields, irrigated fields,
orchards, gardens, arch-roofed sheds, etc.
Its basic functions include rotary tilling, trenching, ridging and transportation. With the help of appropriate
accessories, it can also used for pumping, irrigation, insecticide spraying, harvesting, power generating,
fertilizing, seeding, seed extraction, threshing, climber cutting, grinding to produce thick liquid, etc., besides, it
is simple in structure, easy to maintain and repair, and fuel-efficient, all these features make it an ideal mini
farming machine.
It is a good helper for building a richer life of your family.
Warning! Unauthorized reproduction of this manual or any part of it for any other purpose is prohibited; when
the mini tiller is resold, this manual, as part of the mini tiller, shall be transferred with the mini tiller.
Warning! Please pay special attention to the following information:
Please read carefully this operation and maintenance manual before operation and strictly comply with the
manual while operating. If you operate in compliance with the manual, the mini tiller designed by our company
can work safely and reliably without damage to equipment and personal injury. Should you not operate in
compliance with the manual, there may occur severe damage or injury to your equipment or your body.
Note! Should there be any problem with the machine, or should you have any doubt about it, please contact our
company’s local sales agent.
Let’s join our hands to create a better life!
Thankyou

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Contents
Chapter I Safety warnings···································································································································4
Chapter II Safety symbols···································································································································8
Chapter III Brief introduction of mini tiller ······································································································10
i. Major technical parameters························································································································10
ii.Names of major parts and components of mini tiller·················································································11
Chapter IV Operation method of the mini tiller································································································12
i. Assembly after unpacking··························································································································12
ii. Installation and adjustment of cables········································································································12
iii. Check and oiling ······································································································································14
iv. Starting ·····················································································································································17
v. Operation···················································································································································17
vi. Connection and operation of attached parts ·····························································································18
vii. Precautions for use of mini tiller·············································································································19
Chapter V Maintenance of mini tiller ···············································································································19
i. Running in··················································································································································19
ii. Technical maintenance of mini tiller·········································································································20
iii. Technical maintenance schedule of mini tiller·························································································21
iv. Long storage of mini tiller························································································································22

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Chapter VI Adjustment method of mini tiller ···································································································22
i. Method of adjusting reverse cable ·············································································································22
ii. Method of adjusting clutch cable··············································································································22
iii. Method of adjusting throttle cable ···········································································································23
iv. Method of using and adjusting handlebar ································································································23
Chapter VII Trouble shooting of mini tiller ······································································································25
i. Trouble shooting of clutch ·························································································································25
ii. Trouble shooting of transmission box·······································································································26
iii. Trouble shooting of running mechanism ·································································································28
iv. Trouble shooting for other parts ···············································································································29

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Chapter I Safety warnings
1. Training
a) Carefully read the operation manual. Get fully familiar with the correct method of
operation of this machine and its mechanisms. Understand how to stop it and how to quickly
disengage the operation mechanism.
b) No child is allowed to use the machine! No adult is allowed to use the machine before
carefully reading the manual!
c) Ensure no other persons or things with potential safety risk, especially children and pets,
are inside the working area!
2. Preparation
a) Thoroughly check the area for the machine to work in, and remove all sundries.
b) Before starting the engine, put shift gear in neutral position!
c) Don’t operate the machine without the proper clothing. If the working area has a slippery
ground, wear a pair of anti-skid shoes to improve your standing stability.
d) Take care when treating fuel, which is inflammable! Pay attention to the following rules:
1) Use an appropriate container to hold the fuel.
2) When the engine is running or is hot, never try to add fuel into it!
3) Take extra care when fueling the engine outdoors; never try to fuel the engine indoors!

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4) Before starting, tighten the fuel tank cap and wipe off any fuel spilled out!
e) Never try to make any adjustment when the engine is running!
f) For any operation or work on the machine, for example, preparation and maintenance of the
machine, wearing a pair of safety glasses is necessary.
3. Operation
a) When starting the engine, the shift lever shall stay in the neutral position. The operator’s
hands and feet are not allowed to approach revolving parts or to be under such parts.
b) When operating the machine on (or while crossing) a cobbled road, sidewalk, or highway,
stay alert to the traffic conditions to notice any potential traffic risk! Never use the machine to
carry any passenger!
c) If the machine bumps against any foreign thing, please shut off the engine immediately,
and thoroughly check whether the mini tiller is damaged, if so, repair it before restarting and
operating it.
d) Always pay attention to the surrounding conditions to avoid slipping down, or dropping.
e) If the machine shows any abnormal vibration, shut off the engine without any delay!
Check to find the reason, it’s important because abnormal vibration normally is harbinger of
fault.
f) Before leaving the operating position to repair, adjust, check or remove of things jammed
between blades, always remember to shut off the engine first!
g) If the machine is to be left uncared by the operator, all necessary preventive measures,

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such as disengaging power output shaft, lowering of accessory devices, shift to neutral position of
gear shift lever, and shutting off the engine shall be taken first!
h) Before cleaning, repair or checking the machine, the operator must shut off the engine and
ensure all moving parts are in a stationary state!
i) Engine’s emission is hazardous, so never try to run it indoors!
j）Never operate the mini tiller without proper protection equipment, guard or other
protection devices in place!
k) When the machine is running, always keep it away from children and pets!
l) Never overload the machine with a big tilling depth and a high speed!
m) The machine is not allowed to run at a high speed on a slippery road. Watch back to take
care when driving backward!
n) Never allow any looker-on to approach a running machine!
o) Only the accessory devices and equipment (like the counter weight) allowed by the
manufacturer of the mini tiller may be used
p) Never try to operate the mini tiller when the view is limited or lighting conditions are poor!
q) Take care when tilling a hard field, because the blades may hook into the ground, hence
pushing the mini tiller forward. If such a result does occur, just let free the handle and don’t try to
control the machine!
r）Never operate the mini tiller on an abrupt slope!

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s) Take care not to let the machine turn over when it is ascending or descending a slope!
4. Repair, maintenance and storage
a) Check at a fixed interval whether bolts under shear stress, mounting bolts of engine and
other bolts are tightened properly, so as to ensure the machine can work safely.
b) The machine shall be stored indoors and away from flames, and please cool the engine
before storing it.
c) If the mini tiller is to be stored for a long time, the manual shall always be kept as an
important material.
d) Don’t repair the machine at will unless you have the proper tools and the manual to
instruct disassembling, assembling and repairing of the machine.

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Chapter II Safety symbols
The following symbols are to remind you that if you don’t pay attention, you might be severely injured.
Please carefully read the symbols and notices about safety in the manual.
If these symbols peel off or are illegible, please contact the distributor to replace such symbols.
Figure2-1 Figure2-2
Figure 2-1 to be stuck on engine fuel tank Figure 2-2 to be stuck on engine fuel tank
Figure2-3 Figure2-4
Figure 2-3 to be stuck on engine fuel tank Figure 2-4 to be stuck on engine air filter

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Figure2-5 Figure2-6
Figure 2-5 to be stuck on fender Figure 2-6 to be stuck on fender
All the safety symbols conform to GB10396.

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Chapter III Brief introduction of mini tiller
This product is made in compliance with JB/T10266.1-2001 Specification of Handheld Tillers,
JB/T10266.2-2001 Testing Method for Handheld Tillers, GB/T5608.3-1995 Testing Method of Rotary
Tillers, GB10395.10-2006 Tractors and Machinery for Agriculture and Forestry―Technical Means for
Ensuring Safety and DB50/210-2005 Technical Means for Ensuring Safe Operation of Handheld Tillers.
i. Major technical parameters
Item name Parameters
Corresponding power 168F-2
Maximum theoretical power kW (r/min) 4.8/3600
Weight (without rotary tilling device) (kg) 60
External size (L×W×H) ( mm) 1250×850×1000
Productivity/hour hm2/h.m ≥0.04
Productivity Rotary tilling (m2/h) ≥400
Tilling depth Rotary tilling (mm) ≥100
Tilling width Rotary tilling (mm) 800~1000
Forward (m/s) 1.6/2
Working speed Backward (m/s) 1.2
Tilling blade rotation radius (mm) 150~190

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ii.Names of major parts and components of mini tiller
Figure 1
1. Handlebar assembly 2. Engine assembly 3. Drag bar 4. Transmission box assembly
5.Fender 6.Tillingbladeassembly 7. Reduction gear box assembly
7
6
5
4
3
2
1

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Chapter IV Operation method of the mini tiller
i. Assembly after unpacking
1. Installation of wheel: install the wheels onto both ends of output shaft and use 2 locking pin assemblies
to secure them.
2. Installation of drag bar: fix the drag bar connector onto the hitch box, use a hitch pin to connect them,
and insert a Φ3.5× Φ13×81 clip; then insert the drag bar into the square hole of the connector and use a Φ
8×43 pin and a Φ2.5×Φ9×46 clip to secure them.
3. Installation of handlebar assembly: align the tooth disc on the handlebar to the tooth disc on the
handlebar seat, take care to adjust the vertical position of the handlebar, and use the adjusting handle and a M16
×140 bolt to connect handlebar assembly onto the handlebar seat and tighten it.
4. Installation of shift lever: insert the shift lever through the hole of the handlebar seat’s lug, and into the
hole of the gear shift arm, and then use a Φ2.5×Φ9×46 clip to secure it. Put the shift lever in the neutral
position.
5. Refer to the illustrations of the mini tiller’s accessories for information about assembling of the mini
tiller.
ii. Installation and adjustment of cables
1.Adjustment of clutch cable (see Figure 2 and Figure 4).

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Figure2 Figure3
Figure 4
2. Adjustment of reverse cable (see Figure 3 and Figure 4)
1) Loosen the nut around the reverse cable.
2) Turn clockwise the screw until its exposed part from the handle pipe is of its shortest length.
Clutch cable
Supporting block
Reverse cable
Cable lug
Fork shaft
Reverse cable
Clutch cable Nut
Nut Reverse leve
r
Clutch lever
Throttle leverEngine switch

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3) Insert the reverse cable into the fork shaft on one side of the transmission box and make sure the front
end of the reverse cable is in the big hole of the fork shaft.
4) Turn counterclockwise the reverse shift fork shaft appropriately and insert the cable through the
opening of the cable lug on one side of the transmission box, make sure the front end of conduit is in
the big hole of the cable lug.
5) Loosen out the screw and grip it firmly several times, then release the reverse shift handle, when the
spring tension can return the position of the reverse shift handle, tighten the nut.
3. Adjustment of throttle cable
1) Turn the throttle lever in an anticlockwise direction to the “L” position.
2) Insert the steel wire rope of the throttle cable through the hold-down plate and fixing hole on the upper
side of the accelerator regulator board.
3) Tension the steel wire rope and tighten the fixing bolt of the fixing seat.
4) Repeat adjustment of the throttle switch until the accelerator valve regulator lever’s handle can move to
the “minimum” and “maximum” positions.
iii. Check and oiling
1. Check whether any bolt connection is loose, and if there is any loose connection, tighten it as per the
requirement of bolt connection torques listed in the next table . For information of tightening torques of
engine’s bolts and nuts, please refer to manual of engine.
N
ame Toque ( N.m)
Flange of transmission box and engine 20~25
Transmission box and flange of transmission box 25~30
Bolt to secure back end of transmission box’s drive shaft 10~12
Bolt to secure transmission box’s reverse shaft 26~40

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Bolt to secure engine bracket and transmission box 35~40
Bolt to secure reduction box cover 25~30
Bolt to secure damping lever fixing seat 50~60
Bolt to connect transmission box and reduction box 25~30
Bolt to secure engine bracket and engine 25~30
2. Check whether handles of operating system, namely the handles for accelerator, clutch, gear shift, and
reverse shift can work freely, and whether any of them cannot reach any required position, if so, check to repair
it.
3. Put the shift lever of the transmission box in the neutral position.
4. Filling of engine oil.
Put the engine on a horizontal place.
1) Loosen out the dip stick of the engine, and wipe it off (see Figure 5).
2) Put the dip stick into the oil filler hole (don’t engage the thread)
3) Take out the dip stick to check oil level; if the oil trace is between the upper and lower marks of the oil
stick, the oil level is acceptable.
4) The SAE15W-40 engine oil is the recommended general-purpose lubricant, and it is applicable to a
common ambient temperature (see Table 1).
5) Put the whole machine in a horizontal position. Take off the oil plug and add in about 2 liter of
SAE15W-40 engine oil to the transmission box. The normal oil level shall be at the middle of the oil
window (see Figure 6).

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6) Fill air filter with engine oil. Detach the lower cover of air filter and add in about 0.1 liter of
SAE15W-40 engine oil.
7) Select the number of engine oil according to the ambient temperature of the working environment (see
Table 1).
Oil number
Recommended numbers Extreme usable numbers
Table 1
Tem
p
eratu
Figure 6
Oil window
Oil plug
Figure 5
Dip stick

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5. Add fuel into engine. No.93 or No.97 gasoline can be added into the fuel tank of engine (refer to engine
manual for details).
Note: never let oil level be higher than the upper limit.
6. Prepare the engine as required by engine manual before starting it.
iv. Starting
Note: shift lever must be in the neutral position.
1. Start the engine by following the steps specified in the engine manual.
2. Run the engine at the idle speed (1800±150 r／min) without load for 2 to 3 minutes.
3. Check whether the engine runs normally, if not, stop it to repair.
v. Operation
Note: the mini tiller must be run in before being operated. See Chapter IV for method of running in.
1. Shift to “slow” position.
1) Left hand releases the clutch handle to let clutch disengage.
2) Right hand pulls back the shift lever to “slow” position, take care to ensure it does reach “slow”
position, then right hand grips the right handrail (note: don’t grip the reverse shift handle).
3) Slowly tighten your grip on clutch handle to engage the clutch, then the mini tiller can run at a low
speed.
4) Right hand opens accelerator valve wider appropriately, then the mini tiller will run at a low speed,
namely about 5km/h.
2. Shift to “fast” position
1) Left hand releases the clutch handle to let clutch disengage.
2) Right hand pushes up the shift lever to “fast” position, take care to ensure it does reach “fast” position,
then right hand grips the right handrail (note: don’t grip the reverse shift handle).
3) Slowly tighten your grip on clutch handle to engage the clutch, then the mini tiller can run at a fast
speed.
Right hand opens accelerator valve wider appropriately, then the mini tiller will run at a fast speed, namely

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about 8km/h.
3. Shift to “reverse” position
1) Left hand releases the clutch handle to let clutch disengage.
2) Right hand puts the shift lever to “neutral” position, take care to ensure it does reach “neutral” position,
then slowly tighten your grip on the reverse shift handle.
3) Slowly tighten your grip on clutch handle to let the clutch engage, then mini tiller will run backward
(note: don’t release the reverse shift handle).
4) When you don’t need to run backward, just let your left hand release the clutch handle, and let your
right hand release reverse shift handle.
4. If you want to shift gear during running, reduce accelerator valve opening first but don’t let engine stall,
then disengage the clutch, and shift gear when the mini tiller has stopped running.
5. If you want to change running direction of the mini tiller, just push the handrails leftward or rightward.
Note: don’t grip the handle when changing running direction, or the gear might be damaged.
6. Stopping
1) Release the clutch handle to keep the clutch disengaged.
2) Put the shift lever in the neutral position, push the accelerator valve regulator lever clockwise to the
“minimum” position, and put the start switch on OFF position, then the mini tiller will stop running.
3) When you want to stop the engine, follow the relevant information in the engine’s manual (note:
normally the mini tiller can be stopped on a level ground).
vi. Connection and operation of attached parts
1. When you want to start rotary tilling, detach the wheel and put the hexagon bush of the rotary tilling
device over the two ends of the output shaft of the running mechanism. Note: rotary tilling blades are arranged
into left blade set and right blade set; installation of them shall ensure that when the mini tiller is running
forward, the edges of the blades work first. After installing the rotary tilling blades, you must install the fender
to prevent personal injury by the blades. Depth of rotary tilling can be adjusted by adjusting height of the
damping lever.

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2. Tilling in the irrigated field: when the length of “muddy foot” (i.e. the depth of the operator’s subsidence
into mud) is shorter than 25 cm, the wet soil rotary blade set can be used to till the field. If the length of muddy
foot is between 25 and 45 cm, the operator can use irrigated field rotary tilling roller to till the field.
vii. Precautions for use of mini tiller
1. Observe the working status of different parts and carefully listen to the machine’s sound, check to see if
connections of different parts are normal, because loose connection is not allowed. If any abnormal condition is
found, the operator should stop and check.
2. It is not allowed to work with heavy load right after cold start, especially when the machine is a new one
or an overhauled one.
3. Check the oil levels of engine and transmission box, if the oil levels in them are too low, replenish them
with engine oil.
4. Never try to cool the engine by pouring water on it.
5. When tilling, take care to prevent the mini tiller from falling over.
6. Never run a mini tiller equipped with rotary tilling blades on a beach or on a surface covered with
pebbles, or the blades will be damaged.
7. After using the mini tiller, make sure to remove the mud, weeds or oily grime on the mini tiller to keep
the whole machine clean.
8. Often clean the spongy element or steel mesh inside the filter and change its engine oil.
Chapter V Maintenance of mini tiller
Due to wear from running, friction and change of load, the mini tiller’s bolts may get loose, and parts
and components may get worn, causing lower power of the gasoline engine, higher fuel consumption rate and
other faults that will affect use of the mini tiller. In order to keep the above adverse conditions to a minimum
level, it is necessary to strictly and regularly conduct maintenance of the mini tiller, so that it can maintain a
good technical condition and have a longer service life.
i. Running in