Hobart 120CU20, Operation And Maintenance Manual With Illustrated Parts List

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OM-2228 / Operation and Maintenance Manual
120CU20 / Series 500120 / 400 Hz. Generator Set
October 15, 2013 Chapter 2-2
Page 3
Item Maintenance Required
Lube Oil.
Check oil level daily or after every 10 hours of use. Change oil and the oil filter
after the first 50 to 150 hours of use, then at 500 hour or 6 month intervals
thereafter. Use oil specification API CF-4, HT/HS Viscosity 3.7cP minimum.
Oil Capacity. 4 gallons (15.1 liters)
Oil Filter Replacement
Part Number. Hobart: 286897-029
Cummins: LF3970
Lube Oil Viscosity.
Required as per
Ambient Temperatures.
VISCOSITY AMBIENT TEMPERATURE CONDITIONS
SAE 15W40 (Preferred) 0ºF (-18ºC) and above for most climates
SAE 10W30 -10ºF to +50ºF (-23ºC to +10ºC) Winter conditions
SAE 5W30 -20ºF to +50ºF (-29ºC to +10ºC) Arctic Conditions
SAE 0W30 -20ºF and below to +50ºF (-29ºC and Below to +10ºC)
Synthetic Oils.
See the engine manufacturer’s operations manual for usable synthetic oils and
instructions.
Fuel Water Separator/
Lubricity Additive Filter. Drain filters daily. Change filter element every 500 hours or after 3 months of use,
whichever comes first.
Coolant.
Check coolant level daily.
Engine coolant capacity (system): 10 gallons (37.8 liters)
Coolant hoses and
connections.
Check coolant hoses and connections daily for leaks.
Fan Belt. Check fan belt condition and tension every 500 hours or 6 months of use.
AC Generator. AC generator bearings are sealed and require no periodic lubrication.
Alternator. Alternator bearings are sealed and require no periodic lubrication.
Starter. Starter motor bearings are sealed and require no periodic lubrication.
Water Pump. The water pump is packed at assembly and requires no periodic lubrication.
Fan Hub. The fan hub is lubricated at assembly and requires no periodic lubrication.
Figure 1 Lubrication and Maintenance Chart.