301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Caterpillar


Hydraulic System Oil - Change

Usage:

302.5C GBB


Cat HYDO Oil Change Interval

The standard Cat HYDO oil change interval is every 2000 service hours.

A maintenance interval of 4000 service hours for changing the hydraulic oil is available. The extended interval requires S·O·S monitoring of the hydraulic oil. The interval for S·O·S monitoring is every 500 hours. The maintenance interval for the hydraulic oil filter is not changed.

Machines with hammers are not included in the maintenance interval of 4000 service hours. Machines with hammers must use the intervals that are listed in the Maintenance Interval Schedule. Machines that are used in severe conditions are not included in the maintenance interval 4000 service hours. Machines that are used in severe conditions must use the interval in the Maintenance Interval Schedule.

Cat HYDO Advanced 10 Oil Change Interval

The standard Cat HYDO Advanced 10 oil change interval is every 3000 service hours.

A maintenance interval of 6000 service hours for changing the hydraulic oil is available. The extended interval requires S·O·S monitoring of the hydraulic oil. The interval for S·O·S monitoring is every 500 hours. The maintenance interval for the hydraulic oil filter is not changed.

Machines with hammers are not included in the maintenance interval of 6000 service hours . Machines with hammers must use the intervals that are listed in the Maintenance Interval Schedule. Machines that are used in severe conditions are not included in the maintenance interval 6000 service hours. Machines that are used in severe conditions must use the interval in the Maintenance Interval Schedule.

Procedure to Change the Hydraulic Oil

------ WARNING! ------

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

----------------------

  1. Park the machine on level ground. Position the machine so that the right rear corner of the machine is located outside the tracks.



    Illustration 1g01167770

  1. Extend the stick and the bucket fully. Lower the boom so that the bucket is rested on the ground. Lower the blade to the ground.



    Illustration 2g01168803

    301.6C and 301.8C




    Illustration 3g01168804

    302.5C

  1. Open the access door to the hydraulic tank. Clean the area thoroughly around the hydraulic oil filler cap in order to prevent dirt from entering the hydraulic tank.


    NOTICE

    Hot oil can cause personal injury. Remove the hydraulic oil filler cap only when the engine is stopped. Allow time for the hydraulic system to cool. Remove hydraulic oil filler cap slowly in order to relieve pressure.


  1. The hydraulic oil drain plug is located on the bottom of the hydraulic oil tank.

    Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on Containing Fluid Spillage.

  1. Remove the hydraulic oil drain plug. Allow the oil to drain into a suitable container.

  1. Clean the drain plug and reinstall the plug.

  1. Remove the hose from the hydraulic tank strainer. Inspect the hose. Replace the hose if the hose is damaged.

  1. Remove the hydraulic tank strainer. Inspect the strainer and clean the strainer. Replace the strainer if the strainer is worn.

  1. Install the strainer. Install the hose.

  1. Change the hydraulic oil filter. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Filter (Return) - Replace".

  1. Fill the hydraulic system oil tank. Refer to Operation and Maintenance Manual, "Lubricant Viscosities" and Operation and Maintenance Manual, " Capacities (Refill)".

  1. Inspect the gasket on the hydraulic tank filler cap for damage. Replace the gasket, if necessary.

  1. Install the hydraulic tank filler cap.

  1. Start the engine and run the engine for a few minutes. Operate the control levers in order to cause the hydraulic oil to flow through the circuits.



    Illustration 4g01167771

    301.8C is shown.




    Illustration 5g01621721

    302.5C is shown.

  1. Maintain the hydraulic oil level between the top mark and the bottom mark on the decal next to the sight gauge, if a decal is installed. This is particularly important on early 301.6c and 301.8c models. The correct oil level is important to avoid pump cavitation. If your machine has no decal next to the sight gauge, the oil level must be visible in the sight gauge. Any position on the sight gauge is acceptable level.

    Note: The oil must be free of bubbles. If bubbles are present in the oil, air is entering the hydraulic system. Inspect the suction hoses, the hose clamps and the hydraulic oil return filter.

  1. Stop the engine.

  1. If necessary, tighten any loose clamps and any loose connections. Replace any damaged hoses.

  1. Close the access door.

Caterpillar Information System:

324D Excavator Hydraulic System Main Hydraulic System
325C LCR Excavator Machine Systems Platform - Remove
C9.3 Engines for Caterpillar Built Machines Engine Oil Pressure - Test
2005/05/30 The Bearing in the Fan Pump Is Improved {1387, 5073}
2011/03/09 An Improved Lifter Is Used for 3500 Engines with Mechanical Unit Injectors {1102, 1121, 1123}
M318C and M322C Excavators Machine Systems Cab Riser and Frame - Remove and Install
C27 PET GEN SET Electric Power Generation and C27 KNOCKDOWN K Petroleum Power Train Package Symbols
301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Hydraulic System Oil Filter (Return) - Replace
301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Hydraulic System Oil Cooler Core - Clean
301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Hydraulic System Oil Level - Check
325C LCR Excavator Machine Systems Main Hydraulic Pump - Install
325C LCR Excavator Machine Systems Main Hydraulic Pump - Remove
301.6C and 301.8C Mini Hydraulic Excavators Hydraulic System Blade Hydraulic System
301.6C and 301.8C Mini Hydraulic Excavators Hydraulic System Relief Valve (Main)
301.6C and 301.8C Mini Hydraulic Excavators Hydraulic System Implements and Swing Controls Alternate Patterns - If Equipped
301.6C and 301.8C Mini Hydraulic Excavators Hydraulic System Main Hydraulic System
M313C and M315C Excavators Joystick Controls
301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Cab Air Filter (Fresh Air) - Clean/Replace
301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Blade Linkage - Lubricate
301.6C, 301.8C and 302.5C Mini Hydraulic Excavators Boom and Stick Linkage - Lubricate
C9 Generator Set Fuel System Primary Filter (Water Separator) Element - Replace
325C LCR Excavator Machine Systems Platform - Install
2014/08/01 A New Fuel Transfer Pump Has Been Released {1256}
Replacing Tooth Holders on the Rotary Cutter Drum for the HM312 and HM315{0751, 6638} Replacing Tooth Holders on the Rotary Cutter Drum for the HM312 and HM315{0751, 6638}
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.