jcskippy
New member
got a long tractor, I mix 20 weight oil in the hydraulic oil reservoir. Ive drain it and refill with hydraulic oil what else should i do
got a long tractor, I mix 20 weight oil in the hydraulic oil reservoir. Ive drain it and refill with hydraulic oil what else should i do
An engineer from shell oil once told me that hydraulic oil was the cheapest oil product made and that SAE 30 was far superior in all aspects for the hydraulics and on his personal tractor that was all he used. He ran his tractor for years without any hydraulic issues.
He said that hydraulic oil was price issue due to the quantities generally involved and resulted in a product that was 'good enough' eg; hydraulic oil!
PS, his tractor was a POS otherwise but free from hydraulic issues.
Lubricating Yesterday's Powershift Transmissions
The original lubricant of choice for many older transmissions was engine oil, which performed multiple functions in the engine and drivetrain. Although convenient, using the same lubricant in both compartments is usually not the best choice. Its use can result in too much compromise, particularly as transmissions become more sophisticated, nonmetallic friction materials are used in clutches and brakes, and major changes have occurred in the composition of engine oils.
For example, compared to specialty oils, engine oils may not perform as well in wear performance because of reduced phosphorus and sulfated ash, or in friction stability due to an imbalance of detergents and dispersants. The dispersants used in new-generation engine oils may interact poorly with seals. Why? Because fundamentally, engine oil technology is driven by the needs of advanced engine designs; and the performance in the transmission or final drive is an afterthought at best. Dedicated off-road driveline lubricants, on the other hand, offer specific design features that are driven by the needs of the transmission and final drive.
If engine oils were used in the transmissions and final drives of today's equipment, the engineered limits would not meet the needed performance levels. Engine oils would likely allow clutch slippage and higher temperatures resulting in pump wear, reduced shift response and increased maintenance. The absence of the needed frictional properties in the fluid could result in vibration and noise in wet brakes. Also the oil might attack nonmetallic components, creating leaky seals, gear wear and damage. For example, the fluid could cause the elastomer materials to turn brittle - an undesirable result.