MAINTENANCE PRODUCTS & SERVICES
SAE 10W
TM
Cat HYDO (Hydraulic Oil) ®
For use in Caterpillar® hydraulic and hydrostatic systems
Developed, tested and approved by Caterpillar, Cat HYDO (Hydraulic Oil) ensures optimum life and performance when used as recommended in Cat hydraulic and hydrostatic systems.
Recommended use The preferred lubricant for Cat hydraulic systems is Cat HYDO. We recommend this oil because its additive package provides optimum protection for components within Caterpillar hydraulic systems. Although more expensive than lower-performance industrial hydraulic oils, Cat HYDO ensures the best performance and longest life for hydraulic components. The hydraulic systems of most Cat machines are filled with Cat HYDO before they leave the factory.
Typical Characteristics* SAE Viscosity Grade
10W
Color, ASTM (ASTM D1500)**
1
Gravity, API @ 16°C (ASTM D287)
29.6 - 29.9
Vickers Vane Pump Test (35VQ25)
Pass
Appearance (Visual)
Clear and Bright
Flash Point, °C (ASTM D92)
226
Pour Point, °C (ASTM D97)
-30
Pumping @ -30°C mPaS (ASTM D4684 MOD) Viscosity: cST @ 40°C (ASTM D445) cST @ 100°C (ASTM D445)
We can help you determine the right oil for your Cat machines and engines. You can also refer to your “Operation & Maintenance Manual” or Service Publication SEBU6250 (Caterpillar Machine Fluid Recommendations). An electronic version of this service publication is available at: www.CAT.com Simply choose these selections: Products/Parts and Service/Fluids/Machine Lubricant Recommendations. The goal of Caterpillar engineers is to design machines and engines to provide maximum productivity, long life and low operating costs; Cat HYDO is formulated to help achieve that goal.
20,000
Viscosity Index (ASTM D567)
37.7 - 39.2 6.1 - 6.3 106 - 109
Foam Test:*** Seq. I ml. (ASTM D892)
25/0
Seq. II ml. (ASTM D892)
50/0
Seq. III ml. (ASTM D892)
25/0
Zinc, % wt. (ASTM D1549)
.121
Phosphorus, % wt. (ASTM D1091)
.110
*The values shown are typical values and should not be used as quality control parameters to either accept or reject product. Specifications are subject to change without notice. **Oil used for factory fill may have red dye added for easier detection of leaks. *** New oil, as received, with 0.1% water by volume added.
Cat HYDO (Hydraulic Oil) Advanced formula for maximum performance and protection Cat HYDO is formulated with a balanced additive system, including detergents, dispersants, rust inhibitors, anti-wear agents and defoamers. It offers maximum protection against mechanical wear, rusting and corrosive wear in Cat hydraulic and hydrostatic transmission systems. Cat HYDO is: • Field proven for consistent performance. • Approved and tested by Cat engineers. • An integral part of Cat machine hydraulic and hydrostatic systems design. • Standard Caterpillar worldwide factory-fill oil for most machine hydraulic systems.
A proven balance of additives Cat HYDO contains:
Acceptable Substitutes If Cat HYDO is not used, the following alternatives can be used in the hydraulic and hydrostatic systems of Caterpillar machines.* • Cat DEOTM (Diesel Engine Oil) • Cat TDTOTM (Transmission and Drive Train Oil) • Cat TDTO TMSTM (Transmission and Drive Train Oil— Transmission Multi-Season) • Cat MTO (Multi-Purpose Tractor Oil) • Commercial Heavy Duty Diesel Engine Oil with a minimum zinc content of 900 ppm. (Heavy Duty Oils are identified by API classifications CI-4**, CH-4**, CG-4, CF-4 or CF.) ** However, Cat HYDO should not be used in place of any of these other lubricants. ** API CH-4 and CI-4 oils must also meet the requirements of Caterpillar ECF-1 (Engine Crankcase Fluid specification-1).
• Anti-wear Agents—Zinc dithiophosphate at 1200 ppm (typical) to minimize pump, motor and valve wear. • Emulsifiers—Disperse small amounts of water throughout the oil so water will not damage hydraulic system components. • Defoamers and Air Release Agents—Prevent the formation of bubbles by reducing oil surface tension to quickly release air content to the atmosphere. • Anti-oxidants—Prevent the formation of sludge and corrosive acids at high system temperatures and pressures. • Detergents/Dispersants—Keep components free of deposits, breaking up contaminants and holding them in suspension. • Excellent rust and corrosion inhibitors to protect metals containing iron or copper.
S•O•S Services for early problem detection SM
Caterpillar recommends protecting your investment by using S•O•S Services. Our S•O•S Oil Analysis program is the ultimate detection and diagnostic tool for your equipment, helping you head off potential problems before they lead to major failures and costly unscheduled downtime.
4000 Hour Oil Change Intervals*** The drain interval recommendation for Cat HYDO and alternatives is 4000 hours for all machine hydraulic system compartments where recommended for use. Oil that is not included in the alternatives list should be changed at 2000 hours. Cat HYDO should not be used in hydraulic systems that contain friction material, except hydraulic excavators.**** Note: Refer to your Operation & Maintenance Manual or Service Publication SEBU5250 (Caterpillar Machine Fluids Recommendations) for “Lubricant Viscosities For Ambient Temperatures” recommendations. ***For additional requirements, see IRM FLU01-02, “New Recommended Service Intervals for Hydraulic Systems on Caterpillar Machines,” Form Number PELE0824. ****One example of an ineligible compartment is the integrated hydraulic and brake system on certain off-highway truck models.
MAINTENANCE PRODUCTS & SERVICES
Do not use industrial hydraulic oils
Keep it clean
Industrial hydraulic oils may shorten hydraulic pump and component life. Often referred to as “AW” (Anti-Wear) oil, these products typically omit or contain reduced levels of the additive agents listed in this publication. Industrial hydraulic oils are usually formulated to separate water from the oil, a desired characteristic for stationary hydraulic systems. However, in earthmoving equipment this separated water will cause pump and component damage if it is suddenly drawn through the system from the tank as the machine moves. Furthermore, during freezing weather such water may form ice, causing even more extensive damage.
Along with the use of proper hydraulic fluid, oil cleanliness is essential to achieving the full life of hydraulic system components. New hydraulic oil should be filtered to meet a cleanliness of ISO 16/13 or lower when put into Caterpillar machines to achieve a machine operating cleanliness level of ISO 18/15 or lower. Hydraulic oil that has been removed during a repair process must be filtered to a minimum of ISO 16/13 before it is used to refill. Any used oil should be checked using S•O•S Oil Analysis before it is reused.
Cat HYDO contains emulsifier additives to disperse small amounts of water throughout the system, minimizing water damage to hydraulic components. Avoid hydraulic oils with specifications that indicate they “separate,” “shed” or “release” water. These oils do not contain emulsifiers.
After repairs that involve exposing any hydraulic component to the atmosphere or contamination, a clean-out hydraulic filter should be installed. See your Caterpillar dealer for part numbers and more information. Also, an oil sample should be taken within several hours of returning the machine to service to assure an operating cleanliness level of ISO 18/15.
Hydraulic oil zinc additive levels Cat HYDO contains emulsifiers
1200 ppm
Oil
Water
Oil
Water
Zinc (parts per million)
1000
750
500
500
250
300
Cat HYDO Cat HYDO
Industrial Hydraulic Oil
Typical industrial hydraulic oils separate water and oil, which can cause valve sticking or excessive wear on your hydraulic system. Cat HYDO disperses small amounts of water throughout the oil to ensure proper lubrication.
Industrial Hydraulic Oil (Typical)
A high level of zinc additives is essential for protecting pumps, motors and valves from excessive wear. Cat HYDO contains more than twice as much zinc as typical (AW) industrial hydraulic oil to maximize your hydraulic system’s life and performance.
MAINTENANCE PRODUCTS & SERVICES
Cat HYDO (Hydraulic Oil) Use the best filters
Proper use for health and safety
Caterpillar fine-filtration hydraulic filters should be used after repairing or opening the hydraulic system and after each oil change. Do not operate with fine filtration filters for more than 100 hours as they will plug more readily than standard filters. We recommend using only Caterpillar hydraulic filters on Caterpillar machines because of their proven ability to trap and hold debris and their exceptional burst strength.
According to toxicology information, Cat HYDO has little or no adverse effects if handled and used properly. No special precautions are suggested beyond attending to good personal hygiene and avoiding prolonged, repeated skin contact. For more information, refer to the Material Safety Data Sheet, located on the Internet at: www.catmsds.com
For more information, see us today or visit our Web site at www.CAT.com PEHJ0009
© 2003 Caterpillar
Printed in U.S.A.
