349D2 MHPU Mobile Hydraulic Power Unit (OEM) Maintenance Interval Schedule Caterpillar

Ensure that all safety information, warnings, and instructions are read and understood before any operation or any maintenance procedures are performed.

The user is responsible for the performance of maintenance. All adjustments, the use of proper lubricants, fluids, filters, and the replacement of components due to normal wear and aging are included. Failure to adhere to proper maintenance intervals and procedures may result in diminished performance of the product and/or accelerated wear of components.

Use mileage, fuel consumption, service hours, or calendar time, WHICH EVER OCCURS FIRST, in order to determine the maintenance intervals. Products that operate in severe operating conditions may require more frequent maintenance. Refer to the maintenance procedure for any other exceptions that may change the maintenance intervals.

Note: Before each consecutive interval is performed, all maintenance from the previous interval must be performed.

Note: If Cat HYDO Advanced hydraulic oils are used, the hydraulic oil change interval is extended to 6000 hours. S·O·S services after 3000 hours is strongly recommended. Consult your Cat dealer for details.

When Required

Air Conditioner/Cab Heater Filter (Recirculation) - Inspect/Replace
Battery - Recycle
Battery or Battery Cable - Inspect/Replace
Cab Air Filter (Fresh Air) - Clean/Replace
Circuit Breakers - Reset
Engine Air Filter Primary Element - Clean/Replace
Engine Air Filter Secondary Element - Replace
Ether Starting Aid Cylinder - Replace
Film (Product Identification) - Clean
Fuel System - Prime
Fuses - Replace
High Intensity Discharge Lamp (HID) - Replace
Oil Filter - Inspect
Radiator Core - Clean
Track Adjustment - Adjust
Window Washer Reservoir - Fill
Window Wiper - Inspect/Replace
Windows - Clean

Every 10 Service Hours or Daily

Cooling System Coolant Level - Check
Engine Oil Level - Check
Fuel System Water Separator - Drain
Fuel Tank Water and Sediment - Drain
Hydraulic System Oil Level - Check
Indicators and Gauges - Test
Seat Belt - Inspect
Track Adjustment - Inspect
Travel Alarm - Test
Undercarriage - Check

Initial 250 Service Hours

Final Drive Oil - Change
Hydraulic System Oil Filter (Case Drain) - Replace
Hydraulic System Oil Filter (Pilot) - Replace
Hydraulic System Oil Filter (Return) - Replace
Swing Drive Oil - Change

Every 250 Service Hours

Cooling System Coolant Sample (Level 1) - Obtain
Engine Oil Sample - Obtain
Final Drive Oil Sample - Obtain

Every 250 Service Hours or Monthly

Belt - Inspect/Adjust/Replace
Condenser (Refrigerant) - Clean
Final Drive Oil Level - Check
Swing Bearing - Lubricate
Swing Drive Oil Level - Check

Initial 500 Hours (for New Systems, Refilled Systems, and Converted Systems)

Cooling System Coolant Sample (Level 2) - Obtain

Every 500 Service Hours

Hydraulic System Oil Sample - Obtain
Pump Coupling Oil Level - Check
Swing Drive Oil Sample - Obtain

Every 500 Service Hours or 3 Months

Engine Crankcase Breather - Clean
Engine Oil and Filter - Change
Fuel System Primary Filter (Water Separator) Element - Replace
Fuel System Secondary Filter - Replace
Fuel System Third Filter - Replace
Fuel Tank Cap and Strainer - Clean

Every 1000 Service Hours or 6 Months

Battery - Clean
Battery Electrolyte Level - Check
Battery Hold-Down - Tighten
Hydraulic System Oil Filter (Case Drain) - Replace
Hydraulic System Oil Filter (Pilot) - Replace
Rollover Protective Structure (ROPS) - Inspect
Swing Drive Oil - Change

Every 2000 Service Hours or 1 Year

Final Drive Oil - Change
Hydraulic System Oil Filter (Return) - Replace
Receiver Dryer (Refrigerant) - Replace
Swing Gear - Lubricate

Every Year

Cooling System Coolant Sample (Level 2) - Obtain

Every 3 Years After Date of Installation or Every 5 Years After Date of Manufacture

Seat Belt - Replace

Every 5000 Service Hours or 3 Years

Pump Coupling Oil - Change

Every 6000 Service Hours or 3 Years

Cooling System Coolant Extender (ELC) - Add
Hydraulic System Oil - Change

Every 12 000 Service Hours or 6 Years

Cooling System Coolant (ELC) - Change