| Compartment | Recommended Oil Change Interval (1) | Recommended Sampling Interval | Sampling Valve |
| Engine | 500 Hours (2) | 250 Hours | No |
| Transmission | 1000 Hours | 500 Hours | No |
| Hydraulics | 2000 Hours | 500 Hours | Yes (3) |
| Front All Wheel Drive Axle and Final Drives | 1000 Hours | 500 Hours | No |
| Rear Axle (4) | 1000 Hours | N/A | No |
| ( 1 ) | These intervals are recommended. Refer to the results for the S·O·S oil analysis in order to determine if the oil change interval should be increased or decreased. |
| ( 2 ) | If the API category is less than CG-4, the oil change interval should be changed to 250 hours. If the sulfur content is greater than 1.5% by weight, the oil change interval should be changed to 250 hours. |
| ( 3 ) | The sampling valve needs to be installed. Refer to Special Instruction, SEBF8333, "Backhoe Loader S·O·S Sampling Valve and Filter Cart Installation Procedure" in order to install the sampling valve. Otherwise, obtain the sample from the filler tube of the hydraulic tank. |
| ( 4 ) | Add one quart of 197-0017 Axle and Brake Oil Additive to the rear axle. |
The rear differential is not sampled due to the inboard brakes. S·O·S oil analysis would indicate a high level of contaminates which is common with inboard brakes.
Consult your Caterpillar dealer for complete information and assistance in establishing an S·O·S program for your equipment.
Sampling Port Locations for Machines with the Following Serial Numbers
- FDP1-14495
- BLN1-7965
- BNK1-4366
- BML1-3502
- BKC1-UP
- BMC1-UP
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| Illustration 1 | g00954137 |
Sampling port for the engine oil | |
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| Illustration 2 | g00954153 |
Sampling port for the transmission | |
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| Illustration 3 | g00743423 |
Sampling port for the hydraulic system | |
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| Illustration 4 | g00290415 |
Sampling port for the front axle | |
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| Illustration 5 | g00287534 |
Sampling port for front final drive | |
Sampling Port Locations for Machines with the Following Serial Numbers
- FDP14496-UP
- BLN7966-UP
- BNK4367-UP
- BML3503-UP
| | |
| Illustration 6 | g00954137 |
Sampling port for the engine oil | |
| | |
| Illustration 7 | g00954153 |
Sampling port for the transmission | |
| | |
| Illustration 8 | g00743423 |
Sampling port for the hydraulic system | |
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| Illustration 9 | g00833522 |
Sampling port for the front axle | |
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| Illustration 10 | g00833682 |
Sampling port for front final drive | |
More Frequent S·O·S Sampling Improves Life Cycle Management
Traditionally, the suggested S·O·S sampling intervals have been at each oil change, 250 hours for engines, or every 500 hours for all other compartments. A sampling interval of 250 hours for all compartments is recommended under the following conditions.
Application
Studies have revealed that 500 hours between oil samples is too long of an interval for timely prediction of potential failure modes in some high load and high temperature applications. A 250 hour sampling interval provides more data points between oil change intervals. More data points between oil change intervals will increase the chance in order to detect a potential failure.
Determining Optimal Oil Change Intervals
In order to find the optimal utility of a particular oil, the compartments should be sampled on a 250 hour interval. This will provide the information about the condition of the oil and information concerning the oil performance. Also, more data points enable close monitoring of component wear rates with maximum lubrication utility. For detailed information on extending oil change intervals, please contact your Caterpillar dealer.
Optimizing the Component Life Cycle
An increased sampling interval also provides data trends that are defined better from one oil change interval to the next oil change interval. This enables close monitoring of the wear patterns of the component life cycle to ensure that the full component life cycle is realized.
In a summation, the standard S·O·S interval for oil sampling for all engines remains at 250 hours. While 500 hour oil sample intervals remain acceptable for compartments other than engine compartments, these intervals are not necessarily the optimal intervals. Under the above conditions, 250 hour oil sampling intervals are recommended.