|
|
|
19
Chapter
Ⅲ
Technical Maintenance of the Tractor
In order to keep the tractor in excellent condition, prolong its service life and reduce
troubles, the users must often check the technical conditions of the tractor and strictly carry
out technical maintenance of all classes.
Table 3-1 Technical Maintenance Periodic Table
In actual use, users can add and perfect the contents and methods of maintenance
according to concrete conditions.
1. Shift maintenance
1) Clean dirt and sludge on the tractor and implements. Under the extremely dusty
circumstances, the air filter should be cleaned.
2) Check all main fastening bolts and nuts on the tractor outside, especially whether
front and rear wheel nuts are loose, tighten if necessary.
3) Examine the liquid level in oil sump, radiator, fuel tank and lifter; refill if necessary.
Only after the engine has stopped for more than 15 minutes can the oil lever in oil sump be
examined.
4) Check whether there is leakage of oil, water and air; remove if necessary.
5) Check the tire pressure, and inflate if necessary.
6) Grease the points according to the table 2-1. Before greasing, the sludge and water
should be squeezed from the lubricating points.
7) Check the specified tools supplied.
2. First class maintenance
Carry out the following maintenance after every 50 hours of operation:
1) Carry out the maintenance items in shift maintenance.
2) Clean air filter, and replace oil in the filter house.
3) Check the fan belt tension (When pressing the middle part of the longer side of the
belt, the belt drops about 15-25 mm under the force of about 10N, then the tension is
suitable), adjust if necessary.
4) Check and adjust the free travels of clutch pedal and brake pedals.
Maintenance class
Working hours of the tractor (h)
Shift maintenance
After every shift or every 10-12 hours of operation
First class maintenance
Every 50 hours of operation
Second class maintenance
Every 250 hours of operation
Third class maintenance
Every 500 hours of operation
Fourth class maintenance
Every 1000 hours of operation
20
5) Check the oil level in transmission box and front drive axle, refill if necessary.
6) Wipe the battery with a piece of cloth, check the electrolyte level which should be 10-
15 mm above the polar plates, refill with distilled if necessary . Smear the terminals with
grease to avoid corrosion.
3. Second class maintenance
Carry out the following maintenance after every 250 hours of operation;
1) Complete first class maintenance items.
2) Replace the engine oil in engine sump, flush engine sump, oil pump strainer and oil
filter.
4. Third class maintenance
Carry out the following maintenance after every 500 hours of operation.
1) Complete second class maintenance items.
2) Check and adjust inlet and exhaust valve clearance, injection pressure and spray
atomization of the injector according to the requirements in the engine operation manual.
3) Clean fuel tank and fuel cartridge.
4) Flush transmission box, replace lubricating oil.
5) Flush the filter of hydraulic lifter, check the oil cleanliness degree, flush the inside of
lifter house and replace with fresh oil if necessary.
6) Check and adjust front wheel toe- in (The toe - in should be 4-10 mm). Check the
clearance of the front wheel bearing, and adjust if necessary. Replace the grease in the front
wheel hubs.
°
7) Check the free travel of the steering wheel (The free angle should be less than 15
),
adjust if necessary.
8) Check the oil level in steering gear, and refill if necessary.
5. Fourth class maintenance
Carry out the following maintenance after every 1000 hours of operation;
1) Complete third class maintenance.
2) Carry out maintenance items according to regulations in diesel engine operation
manual.
3) Clean the fuel tank with 25% hydrochloric acid solution, then flush it with clean
water.
4) Disassemble the starter and generator, clean off the grease in the bearings and
replace it with fresh grease. Meanwhile examine the transmission mechanism of the starter.
5) Clean the gathered carbon in the silencer and exhaust manifold.
6) Immerse the front bearing and release bearing of the clutch into dissolved high
temperature- resistant grease, and refill with fresh grease.
21
7) Check and adjust the meshing backlash and print of the main drive bevel gears, the
bearing clearance and preload of the bevel gears.
8) Clean the oil filter in the hydraulic lifting system, replace the oil in the system with
fresh oil.
9) Clean steering gear, replace the lubricating oil in it.
10) After the maintenance has been done, run the maintained tractor for a short time
for trial to see whether every part is in normal condition.
6. Maintenance in winter
℃
While the tractor is used below 5
, the users should carry out special maintenance on
the tractor. Besides completing the every shift maintenance, the following regulations should
also be obeyed.
1) The engine is not allowed to be started if there is no water in the cooling system. Hot
℃
water of 60-80
can be poured into the radiator for easy starting the engine.
2) After cold starting, the engine should be preheated for a period of time; operation
℃
can not be conducted until the water temperature is above 60
.
3) If the tractor will stop for a long time after operation, the water (without anti- icing
fluid in it ) in the cooling system should be drained out. Water temperature of draining out is
℃
50-55
.
4) Choose fuel and lubricating oil according to air temperature or season.
5) In cold season, in order to start the engine easily, the tractor can be stored in a warm
storehouse.
7. Maintenance for storage of a long period
The tractor for storage of a long period should be fully examined on its technical
condition; the tractor whose technical condition is perfectly normal can be put into the
storehouse.
1) Store the tractor in dry storehouse; support the front and rear wheels off the ground
with wood pieces. If storing in the open air for limited condition, cover the tractor with tarp
and dig drains around the tractor. The place for storing should be far away from fire (kitchen
house, oil depot and etc.)
2). Clean the outside of the tractor and lubricate each lubrication point with grease
according to table 2-1.
3). Drain out the cooling water, dismount the battery for storage and cover the exhaust
manifold mouth well.
4). Start the engine to run for 20 minutes every three months to see whether the tractor is in
normal condition.
22
Ⅳ
ter
AChapdjustment of Tractor
1. Adjustment of clutch
Due to continuous wear of parts during operation of the clutch, clutch slip and clutch
incomplete disengagement will happen, which can't make the tractor work normally;
therefore adjustment of clutch should be timely made.
1) Adjustment of dual stage clutch
Fig. 4-1 is connection-controlled dual stage clutch. It mainly consists of three parts:
driving part, driven part and controlling part. Driving part rotates with the engine flywheel;
only when the clutch engages can the driven part rotate with the engine.
Dual stage clutch should be adjusted on a fixture. The adjusting steps are as follows:
Adjust the length of adjusting bolt (11) to make the distance between 3 release levers (19) and
the end faces of PTO clutch pressure plate (4) is 96.8mm, and the distance difference between
3 release levers and PTO clutch pressure plate is no more than 0.1mm; after adjustment
×
tighten it with nut M10
1.
|
|
|