COMBINE HARVESTER AW70V, VNQ, AW82V, VNQ. Manual - part 17

Maintenance after operation

 

69 

 

 

6. Exhaust muffler 

 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Cleaning the front air filter

 

Dust may accumulate in the pre-cleaner during 
operation. Clean it on a daily basis. 
<Cleaning> 
Remove the wing nut on top of the pre-cleaner to 
remove dust inside. 


  The pre-cleaner front can not collect all dust. 

Clean the air filter while cleaning the pre-cleaner. 

 

 

 
[Precaution] 



 

Stop operation and use waterproof cloth to 
cover the machine in case of rain during 
operation. Pay special attention to the 
pre-cleaner to prevent rain. 
Pay full attention to prevent air filter from being 
caught in the rain in the event that it rains 
during transportation. 



 

In case of damage to air filter or inlet pipe, 
replace it with a new one. Otherwise, water 
may enter and cause engine failure. 

Pre-cleaner

Wing nut

Maintenance after operation

 

70 

 

 

5. Long-time storage

 

 

Store the machine as instructed below if it is not to be 
used for a long time. 
1- Store the machine in a dry and well-ventilated place 

protected against rain, and add wood planks under 
the crawler. 

2- Put all control levers to “OFF”. 
3- Close the assist grain deck. 
4- Lower the header to the floor. 
5- Fill the fuel tank. There will be water drops and the 

tank may be rusted if it is left empty. 

6- Coat anti-rust oil, engine oil or grease on external 

surfaces subject to rust. 

7- Fully charge the battery. Try to remove it from the 

machine and store in a cool and well-ventilated place. 
The cathode should be detached before the battery 
is mounted on the machine. 

 

 

Remove wire harness from the cathode (-) terminal

 

 

[Precaution] 
The battery is subject to natural discharging even if 
it is not used. Charge it on a monthly basis. 
 
 
 
 
 
 
 
 
 
 
 
 

 

If the machine is not to be used for a long time, it should 
be arranged with periodic inspection and maintenance 
according to the guidelines for inspection and 
maintenance, so as to ensure it is under the optimal 
operating condition when used at the next time. 
 
[Precaution] 



 

In case of residual grains and straws in the 
parts, rats may nest there and bite the 
electrical wires, and thus future operation be 
affected. Clean them thoroughly. 



 

Take out the key and keep it properly. 

 
 
 

 

 

 

 

 

(--)

 

Periodic Inspection

 

71 

 

 
Maintenance of YANMAR Combine 
harvester

 

Due to rotating and vibration of the machine, wear of 
parts and changes in load and operating environment 
during operation or transportation, its technical 
conditions may be worsened, efficiency be reduced, 
parts be damaged, or serious accidents be caused. To 
prevent the accidents, the machine should be correctly 
operated to extend its service life, all parts be checked 
and cleaned, bolts be tightened and adjusted, or parts 
be replaced when necessary. This is the so-called 
maintenance. 
 
<Content of daily maintenance> 
1- Check and clean the air filter elements, the screen of 

oil cooler & radiator and engine dust protector. 

 

2- Check the amount of engine oil, radiator & sub water 

tanks for leakage. 

 
3- Clean the parts required to be cleaned (cleanouts of 

1st and 2nd conveyers). 

 
4- Remove straw stuck in and between the drive shaft 

and driven shaft of chains, as well as chaff attached 
on drive belts. 

 
5- Lubricate all chains, remove mud and chaff on 

cutters, check any damage in the chains and cutters, 
and add lubricant in the gap between upper and 
lower cutter blades. (Lubricate the chains and 
cutters every 2 hours during operation) 

 
6- Check whether the tension spring of chains is 

loosened. 

 
7- Remove chaff on the concave screen and swing 

separator of the threshing section. In particular, 
check the degree of wear on the concave screen 
(high moisture content of crops), and replace it when 
necessary. 

 
8- Check the threshing tooth, mount reversely or 

replace them if necessary. 

 
9- Check the crawler tension, and tighten it if necessary. 

Be sure to remove the mud, grass or straw 
on/between the sprocket, rollers, crawler guide, 
frame and transmission. Otherwise, the crawler may   

 
hardly move, its power is reduced, and the 
sprocket and crawler be subject to early wear. 

 
10- Fill the fuel tank. 

 
11- Check whether the engine and other parts are 

under normal conditions. 

 
12- Check whether the bolts and nuts are loosened. 
 
[Precaution] 



 

Protect electrical parts, the swing separator 
and belts from water, or failures may be 
caused. 



 

Fuel without dirt is supplied. 

 

 

● 

Check whether the engine is shut 
down, control levers are in the “OFF” 
position, and wait till are moving parts 
are completely stopped before 
inspection, maintenance and 
adjustment. Otherwise, you may be 
injured. 

● 

Be sure to fix the safety lock of header 
section before raising it for inspection, 
maintenance and adjustment. 
Otherwise, the header may fall down 
quickly and cause injuries. Refer P37. 

● 

Full ventilation should be provided 
during inspection indoors. Otherwise, 
you may be poisoned by exhaust gas 
from the engine. 

● 

When multiple maintenance 
operations, take out the key from the 
switch to ensure safety.

 

 
It is recommended that periodic inspection and 
maintenance be performed in the slack season to 
ensure full mechanical performance, safe and 
comfortable operation in the busy season. Therefore, 
safety of all parts should be ensured during inspection 
and maintenance. In particular, the radiator of fuel 
channel and other rubber tubing should be replaced 
every 2 years, and the electrical wiring be checked on a 
yearly basis, so as to maintain the machine under the 
optimal working condition. 
 

Periodic Inspection

 

72 

 

 

1. Schedule for refueling, oiling and water supply

 

 

[IMPORTANT] 

When changing or adding oil, after filling a predetermined amount of oil and running the engine for a few 
minutes, check that the oil is within the range of oil gauge again. 
If it is exceeding the oil gauge, either add or release oil 
 

[Precaution] 



 

Replace oil while periodic inspection. (Use the designated oil) 



 

Never drain the waste oil directly into a river or sewer, but employ a professional agent for treatment. 

 

 

ALWAYS BE ENVIRONMENTALLY RESPONSIBLE 

● 

Follow the guidelines of the governmental agency for the proper disposal of 
hazardous materials such as engine oil, diesel fuel, engine coolant and, machine 
fluid, grease. 

● 

NEVER dispose of hazardous materials irresponsibly by dumping them into a sewer, 
on the ground, or into groundwater or waterways. 

● 

Failure to follow these procedures may seriously harm the environment. 

● 

Comply with legal regulations and guidelines for disposal of: empty containers for 
fuel, cooling water (coolant), oil, grease; fuel/oil filters; batteries; machine itself; 
machine accessories; and packaging materials. 

 

Item Capacity 

Type 

Interval 

Fuel 

80L 

Diesel fuel 

Before and after operation 

Cooling 

water 

Main water tank 

7.2L 

Pure water, anti-freezing liquid 

Or long life coolant 

Every year 

Aux. water tank 

1.1L 

Engine oil 

10.2L 

Engine oil 15W-40 CD 

First time: 50 hours 
2nd time : 200 hours 
After    : every 200 hours 

Transmission oil 

8.5L 

TF300 transmission oil 

(*TF500 recommended) 

First time: 50 hours 
2nd time : 400 hours 

After : every 400 hours 

Rotor drive case 

1.4L 

90# gear oil 

First time: 50 hours 
2nd time : 400 hours 

After : every 400 hours 

Hydraulic oil tank 

(about 3L in the pipe) 

17L 

Wear-resistant hydraulic oil 

VG46 or VG56 

Every 400 hours