Visual Inspection
In order to properly troubleshoot a problem, first perform the visual checks. Activate the parking and secondary brakes. Place the bowl in the lowered position. Do the following visual checks.
- Check the oil level in the differential.
- Check the oil level in the output transfer gear case.
- Check all the oil lines, hoses and connections for leaks or damages.
- Check all external valves for leaks or damages.
- Check for oil on the ground under the machine.
- Check the transmission control linkage for damage and adjustment.
- Inspect the transmission oil filter, the magnetic screen and the suction screen.
Remove some of the oil from the housing of the transmission oil filter. Remove the filter. Cut apart the filter and inspect the filter element for foreign materials. Also, inspect the scavenge screen and the magnetic screen in the transfer gear case for the transmission. A magnet separates the ferrous particles from the nonferrous particles.
This is a list of some of the particles that may be found in the filter element.
- Aluminum particles give the indication of torque converter failure.
- Bronze particles give the indication of worn clutches in transmission.
- Rubber particles give the indication of rubber seal or hose failure.
- Shiny steel particles give the indication of pump failure.
- Iron or steel chips give the indication of broken components in transmission or transfer gears.
If any of the above particles are found, all components of the transmission hydraulic system must be cleaned. Do not use any damaged parts. Damaged parts must be removed and new parts must be installed.
- Aluminum particles give the indication of torque converter failure.
Caterpillar Information System:
615C Wheel Tractor-Scraper Wheel Tractor-Scraper Power Train Transmission Hydraulic System
D9R Track-Type Tractor Indicators and Gauges - Test
924Gz Wheel Loader Axle Oscillation Bearings - Lubricate
3500B Engines Water Temperature Regulators - Install
924Gz Wheel Loader Articulation Bearings - Lubricate
924Gz Wheel Loader Air Conditioner - Test
545 Wheel Skidder Power Train Differential and Bevel Gear - Assemble
613C Series II Wheel Tractor-Scraper Air System and Brakes General Information
Guidelines for the Use of Clean Out Filters for the Hydraulic Oil System and for the Power Train Oil System{3067, 5068} Guidelines for the Use of Clean Out Filters for the Hydraulic Oil System and for the Power Train Oil System{3067, 5068}
Corrosion Protection Package for Wheel Loaders{0645, 7000, 7559} Corrosion Protection Package for Wheel Loaders{0645, 7000, 7559}
3003, 3013, 3014 and 3024 Engines for Caterpillar Built Machines Engine Oil Pump - Remove
Installation Instructions for Mounting 154-5634 Fuel Tank (Auxiliary) {1273} Installation Instructions for Mounting 154-5634 Fuel Tank (Auxiliary) {1273}
3114, 3116 and 3126 Industrial, Marine and Generator Set Engines Aftercooler
3064 and 3066 Engines for Caterpillar Built Machines Engine Oil Pan - Remove and Install
613C Series II Wheel Tractor-Scraper Air System and Brakes Quick-Release and Holding Valve
3500B Engines Water Pump - Remove
924Gz Wheel Loader Battery or Battery Cable - Replace
545 Wheel Skidder Machine Systems Piston Pump (Implement, Pilot, Steering, Brake) - Disassemble
613C Series II Wheel Tractor-Scraper Engine Crankcase Breather - Clean
D7R Track-Type Tractor Transmission Oil Level - Check
3114, 3116 and 3126 Industrial, Marine and Generator Set Engines Air Inlet Heater
615C Wheel Tractor-Scraper Wheel Tractor-Scraper Power Train Selector Valve (Torque Converter Lockup Clutch) - Adjust
613C Series II Wheel Tractor-Scraper Engine Oil Level - Check
3003, 3013, 3014 and 3024 Engines for Caterpillar Built Machines Engine Oil Pump - Install