Yanmar diesel tractor EF494T. OPERATOR'S MANUAL - part 9

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32 

  Clogging or dirt in air filter. 
 

 

 

 

  Tension or damage of cooling fan belt. 
 
 

 

 

Check the radiator grill and engine room for dust.

 
 

 

  Check electrical wiring for wear of sheath and loose 

joints. 

 
 

 

(4) Sitting on the operator’s seat. 

 
  Effect and play in the brake. 
 

(A) Play 30-40mm 

 

 

 

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  Play in the steering wheel. 
 

(A): Play 20-50mm 

 

  Effect and play in the clutch pedal. 
 

(A): Play 15-25mm 

 

(5) Start the engine: 

 
  Check for abnormal sound. 
 

 

  Color of exhaust gas. 
 

(A) What color? 

 

  Function of lamps and meters. 

 

 
 

 

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2. 

Breaking in the engine (first 50 

hours) 

The new tractor should be operated carefully for the first 
50 hours. This will have a large positive effect on the 
lifetime and performance of the tractor throughout its 
life. Pay particular attention to the following points: 
(1) Refrain from abrupt starts and stops. 
(2) Do not use a speed higher than necessary and do 

not load the machine more than necessary. 

(3) Begin operation only after the engine has warmed 

up sufficiently. 

(4) Slow down on rough roads or slopes. 
(5) Check the tractor thoroughly after breaking it in for 

the first 50 hours. 

 

 

3. 

Starting and stopping engine 

 

WARNING 

  Before starting the engine, sit in the driver's seat 

and make sure the levers and controls are within 
the reach for safe operation. Negligence will 
cause a serious injury. 

  Do not start the engine in a closed room. Start the 

engine outdoor where the good ventilation is 
available. If you are forced to start the engine in a 
confined room, make sure the ventilation is 
proper. Gas oxidation can lead to death. 

 

 WARNING 

  Before and after operation, never fail to check and 

service the machine. Particular check will be 
required at the clutch, brake pedals and controls, 
and steering devices. Negligence can cause a 
serious injury to the operator and/or damage to 
the machine. 

  Engage the parking brake during the warm-up 

operation. Otherwise the tractor may abruptly start 
to run. 

 
NOTE:  
In cold season, pay a special attention to the warm-up 
for adequate operation of the hydraulic system.  
   

Temperature  

Warm-up operation  

0 ~ -10°C  

more than 10 min  

-10 ~ -20°C  

more than 20 min  

< -20°C  

more than 30 min 

 

 

 

 

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Starting 

 

CAUTION 

Do not start the engine if the position control lever is not 
in the LOW position. The implement may abruptly raise 
causing a damage or injury to the human and machine. 
 
(1) Set the fuel filter and water separator to "O" to open 

the fuel cock. 

 

(A) Fuel cock open 
(B) Fuel cock close  

 

 

 

 

 
(2) Put the main and range shift levers, reverse lever 

and PTO shift lever in the N position.  

(3) Set the position control lever in LOW. 

 

 
(4) Put the accelerator lever in the TOP position. Fully 

depress the clutch pedal and turn the main switch to 
START. 

(5) After the engine has started, immediately release the 

main switch. 

 

 

IMPORTANT 

* The engine cannot be started without putting both the 

main and PTO shift levers in the N position.