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THIS LISTING IS FOR A REBUILD SERVICE OF YOUR EATON MODEL 771 (CW, CCW) HYDROSTATIC DRIVE UNIT for Grasshopper, Snapper, Woods, Ferris, and others.

***FREE RETURN SHIPPING IN THE UNITED STATES TO THE LOWER 48***

***We rebuild Model 781 and Model 851 units as well! Please contact us as these rebuilds are more extensive***

PLEASE READ DESCRIPTION CAREFULLY!
THIS IS A COMPLETE REBUILD SERVICE WHICH RESTORES THE POWER BACK TO THE HYDROSTAT. YOU SEND US YOUR HYDROSTAT, WE REBUILD IT, AND RETURN IT TO YOU WITH FREE RETURN SHIPPING.

--> IF YOU DO NOT HAVE A REBUILDABLE HYDROSTAT TO SEND US, PLEASE CONTACT US BEFORE PURCHASING TO DISCUSS YOUR OPTIONS!
--> NOT SURE OF THE ROTATION (CW or CCW) OF YOUR HYDROSTAT? KEEP READING TO FIND OUT HOW TO TELL!

Please make sure to read all Buyer Shipping Instructions below before shipping unit.

Rebuild Process & What is Included

This service is NOT to replace only bearings and seals!

We are the only rebuilder of these units that manufactures hand parts and/or rebuilds the individual units to spec.

We specialize in rebuilding units that others would SCRAP.

--> SCORED BORES IN THE DAMPENER PISTON?..................................WE RE-SLEEVE THEM

--> CHECK VALVES LOOSENED AND DAMAGED THE THREADS?........WE REPAIR THE THREADS
--> PINTLE-SHAFT WORN OR SCORED?...................................................WE MACHINE THE DIAMETER & REFIT THE ROTOR BUSHING TO FACTORY SPECS

About the only thing that we cannot repair is a unit that is cracked/broken into the oil cavities, or a unit whose casting is porous and letting the oil seep through the metal!

OCCASIONALLY, the cam-ring is broken and requires a new/gently used one. If this is the case on your unit, we will contact you if this is the situation.

This rebuild service is for the hydrostatic unit from the input shaft all the way up to (and including) the motor rotor (BE SURE TO INCLUDE YOUR MOTOR ROTOR!)

Hydrostatic Drive units sent to us must be in rebuild-able condition**!

No severely corroded, water damaged or otherwise fossilized units. If you have any questions, please contact us first!

**If unit is not repairable, buyer will be contacted and is responsible for return shipping. A full refund will then be issued within 48 hours.

WHAT IS NOT INCLUDED

Our rebuild service does not currently include any work on the planetary axle/final drive unit. Therefore, there is no need to ship it! The added weight will only increase the your shipping charge to us.

Does my hydrostat need to be rebuilt?

Over time, these hydrostatic drive units wear and develop leaks (blow-by) as the tolerances between critical interfaces grow beyond acceptable limits set forth by the original manufacturer. As a result, loss of power is experienced on the unit, especially on hot summer days. Perhaps you are not able to drive uphill or lose power as the unit heats up (very common). Our rebuild service will restore the power your hydrostat as well as alleviate other common issues experienced on these units.

How long will this rebuild process take?

A typical rebuild takes up to 7-10 business days PER UNIT once the unit is received from the customer (this does not include shipping time back to you). If you have multiple units needing rebuilt, we recommend shipping them all at once to allow us to provide the quickest turnaround possible.

We have been rebuilding hydrostats for over 20 years and have been providing this service locally for over 15 years. During this time, we have noted that the wear characteristics are predominantly consistent for these hydrostats. Therefore, the standard rebuild process is as follows:

1. Each unit is completely disassembled, inspected and cleaned.

2. The rotor bushing is inspected, measured, and upgraded bushing installed when necessary. In addition, rotor is refitted with the correct ball clearances, thus bringing the

clearances back into manufacturer specifications.

3. Shafts are measured and inspected. Spindle shafts are rarely ever worn except in extreme cases. If shaft is worn (very rare), you will be contacted about your options.

4. Check valves are inspected for correct functionality and replaced when necessary

5. ALL seals and gaskets are replaced BRAND NEW

6. After assembly, each unit is run on the test stand under load to measure potential loss of performance as the unit temperature rises. Design operating temperature on these units is 180 degrees Fahrenheit, but we run them to 200 degrees Fahrenheit on the test stand in order to ensure proper operation.

Additional Service as Necessary:

In the event your unit needs additional attention beyond what is stated above, you will be contacted first with your options.

IN SUMMARY

Everything is professionally and meticulously done because we enjoy doing so. This work requires both the skill and the tools to work to clearances and maintain tolerances measured in tenths of a thousandth of an inch (.0001).

NOTE - the unit shown in the image is not the actual unit you will receive, but is an example of the high quality rebuilt unit you will receive from us.

Buyer Shipping Instructions

Upon purchase of this rebuild service, we will contact you with our shipping info. You are responsible for the cost of shipping to us, but will receive FREE RETURN SHIPPING from us.
Buyer must ship unit WITHIN 5 CALENDAR DAYS OF PURCHASE. If unit has not been shipped by buyer within 5 days of purchase of our service, sale will be cancelled. To be clear, we are not asking that the unit arrives to our facility within 5 days of purchase of the service, rather the unit must be shipped by buyer within 5 days of purchase of service.
After you ship your unit, PLEASE MESSAGE US YOUR TRACKING NUMBER (within the 5 days from date of purchase) to ensure your purchase is not cancelled.

As required by law, the hydrostatic drive unit (i.e. – “hydrostat") must be fully drained of oil before shipping. Please ensure that hydrostat is bagged in plastic to deter any residual oil from exiting the shipping container. Please ensure hydrostat is packaged securely and appropriately. We recommend insuring your package through the carrier for damage that could potentially occur during shipping!!

When shipping your unit to us, we recommend using FedEx or UPS Ground shipping (DO NOT use USPS!!). From our experience, shipping costs generally range between $30 and $60, pending on the origin and shipping service chosen. Lastly, please be certain to include a return shipping address on/with box.

If expedited return shipping is required, please message us. You will be charged separately for the upgraded shipping service. Your cost for this option will be the difference of the FREE RETURN SHIPPING we provide and the cost of expedited delivery.

Warranty

As much as we would like to give a warranty, we cannot, because we have no control over where, how, when and why this unit is installed. This unit is re-manufactured to replace an existing unit in the same application that the existing unit was used in the first place. At the same time, customer satisfaction is of utmost importance to us! In the unlikely event you have any issues, please do not leave negative feedback! Instead, please contact us so we can resolve any issues. You will find us pleasant to work with.

How do I determine the ROTATION of my Hydrostat?

1) All EATON hydrostats are stamped with either "CW" or "CCW" on the aluminum casting just below the Input Shaft. For example, if the unit you are sending is stamped with a "CW", then you will need to order a "CW".

2) Another way to tell is when facing the hydrostat from the side with the input shaft, look at the fan to determine what direction it must turn to blow air over the unit. If the fan must spin CCW to do this, then your unit is a CCW.

Have more Questions?

If you have any questions about the hydrostat, rebuild process, shipping or otherwise, please don't hesitate to get ahold of us! We are here to help!