950G Series II Wheel Loader Caterpillar


Oil Filter

Usage:

950G II AXR

Filter Classifications for Controlling Contamination




Illustration 1g01061724

There are three different filter design classifications that are used in implement hydraulic systems on mobile equipment. These classifications are listed below:

  1. Cartridge filter (shown on left) - The filter element fits into a tank or canister with the opening for the filter sealed off by a cap.

  1. Canister filter (shown in center) - The filter element is built into its own housing that screws onto a permanent filter base. The filter material used in the canister filter can be identical to the filter material that is used in the cartridge filter.

  1. Screen (shown on right) - A metallic mesh that fits into a tank or canister, similar to the cartridge filter, but with larger openings to trap large contaminants before they enter the system.

Filter Function




Illustration 2g01061725

Filters clean the hydraulic oil by removing contaminants that can damage component parts. As oil passes through the filter element, contaminants are trapped. Clean oil continues through the system.

Some manufacturer's filter elements are given a rating, micron and beta, according to its tested ability to trap particles. The smaller the micron rating, the smaller the particle that will be trapped by the filter. The larger the beta number for a given micron size, the more of that size particle that will be trapped on the first pass of oil through the filter. These beta ratings are determined by using a certain type of particle in a controlled test.

Some manufacturers overlook the usefulness of these ratings because they are run with constant, controlled flow without surges and do not address the quality or useful life of the elements.

Filter Bypassing




Illustration 3g01061727

Most cartridge and canister filters are equipped with a filter bypass valve in order to ensure the system flow is never blocked. The bypass valves also protect the filter from tearing or from a collapse. The blockage that could lead to the failure of a filter could be caused by the following items:

  1. A buildup of contaminates that clogs the filter.

  1. Cold oil that is too thick to pass through the filter.

When the bypass valve opens, unfiltered oil circulates through the hydraulic system. Unfiltered oil contains contaminants that could cause damage to hydraulic system components. The filter must be replaced in order to close the bypass if the filter is clogged.

The filter bypass valve that opens due to cold oil will normally close as the oil warms. This action again sends the oil through the filter in order to remove the contaminants.

Replace the filters as recommended by the machine manufacturer in order to prevent clogging of the filter, and in order to minimize oil bypassing when the oil is cold.

Caterpillar Information System:

950G Series II Wheel Loader Fluids
D10T Track-Type Tractor Power Train Power Train Oil Pump
2004/03/29 New High Temperature Seals are Available {7555}
992G Wheel Loader and 854G Wheel Dozer Power Train Engagement Pressure for the Lockup Clutch of the Torque Converter (Operator Monitor) - Calibrate
992G Wheel Loader and 854G Wheel Dozer Power Train Impeller Clutch of the Torque Converter (Operator Monitor) - Calibrate
992G Wheel Loader and 854G Wheel Dozer Power Train Position Sensor (Left Brake Pedal) (Operator Monitor) - Calibrate
906 and 908 Wheel Loaders Hydraulic and Steering System Machine Preparation for Troubleshooting
994F Wheel Loader Safety Messages
992G Wheel Loader Electrohydraulic System Position Sensor (Tilt Linkage) - Calibrate
992G Wheel Loader Electrohydraulic System Position Sensor (Lift Linkage) - Calibrate
950G Series II Wheel Loader Accumulator
950G Series II Wheel Loader Hose and Coupling
AD30 Underground Articulated Truck Output Transfer Gears - Assemble
AD30 and AD55 Underground Articulated Trucks Power Train Electronic Control System Backup Alarm
Achieving a Level Bucket Cutting Edge {6001, 6119, 6801} Achieving a Level Bucket Cutting Edge {6001, 6119, 6801}
2004/04/05 Improved Link Assemblies With New Components Are Now Available {4169, 4171}
D6N Track-Type Tractor Engine Supplement Cooling System Package (Radiator, Aftercooler, Oil Cooler) - Remove
D10T Track-Type Tractor Power Train Transfer and Bevel Gears
992G Wheel Loader Electrohydraulic System Pilot Control Actuator (Proportional Solenoid) - Calibrate
966G II and 972G II Wheel Loaders Lubricant Viscosities
906 and 908 Wheel Loaders Hydraulic and Steering System Operational Checks
C11 and C13 Petroleum Engines Fuel System - Prime
D6N Track-Type Tractor Engine Starting
950G Series II Wheel Loader Hydraulic Pump and Motor Introduction
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.