PISTON AS 1799938 - Caterpillar

Table 1
Recommended Lubricant Viscosities for Ambient Temperatures (1)    
Compartment or System    Oil Type    Oil Viscosities    °C    °F
Min Max    Min    Max    
Hydraulic Systems     Caterpillar HYDO     SAE 5W20 (SPC) (2)     -30     +40     -22     +104    
SAE 5W20 -25     +10     -13     +50    
SAE 10 -10     +37     +14     +99    
SAE 10W30 -5     +50     +23     +122    
SAE 15W40 +4     +50     +39     +122    
SAE 30 +10     +50     +50     +122    
Differentials and Final Drives     Caterpillar TDTO
commercial TO-4     SAE 5W20 (SPC) (2)     -30     0     -22     +32    
SAE 10 -30     0     -22     +32    
SAE 30 -20     +25     -4     +77    
SAE 40 -10     +40     +14     +104    
SAE 50 0     +50     +32     +122    
Transmission and Pump Drive     Caterpillar TDTO     SAE 10W30     -20     +40     -4     +104    
( 1 ) When you are operating the machine in temperatures below -20°C (-4°F), refer to Special Publication, SEBU5898, "Cold Weather Recommendations". This is available from your authorized dealer.
( 2 ) These special oils that contain synthetic base stocks do not contain polymer viscosity index improvers. The high viscosity index of the "synthetic" oils provide natural multiviscosity properties.