Yanmar SA424 User Manual

8-5
8. OPERATE THE TRACTOR
SA221/324/424 Operation Manual
3. Using the implements while the engine is still cold
(or not fully warmed up), problems such as
seizure, breakage or premature wear can occur.
4. The engine oil is distributed through out the
engine during warming up.
5. The hydraulic oil also functions as the
transmission oil.
6. In cold weather, the cold oil has a higher
viscosity, making oil circulation sluggish.
• The hydraulic pressure does not smoothly rise
after engine start up.
• The preceding action can cause a problem with
the hydraulic system.
7. To prevent the preceding problem:
• Pre-warm the engine at about 50% of the rated
Revolutions Per Minute (rpm) for a period of time,
as specified in the table below:
(A) Parking brake lock lever
(B) Power Take Off (PTO) switch
(C) Range shift lever
5. Select travel speed
■ Range Shift Lever (SA324/424)
(A) Range shift lever
(a) L (Low): Used for heavy load operation.
Low traveling speed.
(b) N: Neutral
(c) H (High):Used for light load operation.
High traveling speed.
Ambient Temperature
(°F (°C))
Required warm-up time
(min.)
Over 14 (-10) Approximately 5
5 to 14 (-15 to -10) 5 to 10
-4 to 5 (-20 to -15) 10 to 20
Lower than -4 (-20) Longer than 20
(A)
(C)
(B)
IMPORTANT
● Warm up the engine of the tractor before
operating any implements.
IMPORTANT
●To prevent overloading the engine, always select
the appropriate gear and engine speed for the
job.
• use a higher gear and lower engine speed for
work involving a light load
• use a lower gear and higher engine speed for
work involving a heavy load
(A)
(a)
(b)
(c)
SA221_324_424_OperatorsManual.book 5 ページ ２０１８年６月４日 月曜日 午後５時１９分

Yanmar SA424 Specifications

General

Brand	Yanmar
Model	SA424
Category	Tractor
Language	English