News and Helpful Videos

In response to this article, some readers thought that the function of the flushing valve warranted discussion, while others were still confused about the influence of the charge pump when determining case drain leakage. Let’s consider flushing valves first. What is a flushing valve? A closed circuit flushing valve (also called a transmission valve or replenishing valve) usually comprises a pilot operated directional valve and a low pressure relief valve. When the hydrostatic transmission is in neutral, the directional valve is centered and the gallery to the low pressure relief valve is blocked. When the transmission is operated in either...

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic PartsToday we will discuss: John Deere Engine Coolant John Deere advises using John Deere Low Silicate Antifreeze and that it is formulated to GM6038M or similar. Here is a list of other favorable anti freezes:Ethylene- glycol typeContaining no more than 01 % anhydrous meta silicateGeneral Motors Performance Specification GM1899M Note:Some ethylene-glycol antifreeze are used in automobiles. These products are labeled to us in aluminum engines and have more than 01% anhydrous meta silicate. Mix 50-67% low silicate antifreeze with 33-50% distilled...

Eaton Hydraulic Series 76 – Remote Pressure Override Control This control gives a way to remotely adjust the pressure preferences of the pressure override valve. The control can be used in many processes that need variable system pressure protection to eliminate overloads and excessive heat generations. It very similar to a standard pressure override valve. The minimum pressure setting is 1500 PSI If you need further help with this, call us at 800-361-0068 sales@hydrostatic-transmission.com

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic PartsToday we will discuss: Four Way Directional Valves in a CircuitAll valves have a body and an internal moving parts, the moving part of all valves has two positions – both extremes. These two positions are illustrated by two separate squares. Each square is viewed by means of arrows how the spool is connecting the passages within the body at that point and time.When they are placed inside of a circuit, one square and only one square, is connected in the...

Eaton Hydraulic Series 76 Manual Displacement Variable Motor Control This type of control is them common control used on these kinds of motors. It is normally activated by direct mechanical type linkages and cables. The control is a two way position, four way closed center mechanical servo control valve.  There are some difference in the pump and motor control, the control spool is biased (has a cut into the spring washer) to full or maximum swashplate angle with no command to the control handle. It will give it a more control pressure for a full swashplate angle for maximum torque...