Cores are completely disassembled and all external components (housings,
front covers, end caps, etc.) are cleaned. Internal wear parts are manually
washed before the inspection process takes place.
All components are inspected using a variety of instruments and visual
methods to ensure accurate qualification. Every component part is pre-certified
for the next process. If the part doesn't meet the required tolerances
then a new part will be installed in its place.
Plates, cylinder blocks, pistons, mechanical shaft seals, slippers and end
caps are lapped to remove all wear marks and ensure perfect flatness of
surface. The final phase in this process is inspection to verify that these
processed parts are within OEM specification or better (one millionth of
an inch flatness).
All control valves; charge pumps, rotating groups, shaft seals and manifold
blocks are pre-qualified and reassembled. Swash plates are assembled and
running neutral is dialed in to ensure complete control of the pump when
installed back on the machine. Final assembly of all units is made to
the customer or inventory requirements.
All units are tested and verified against factory specifications. The pump
and motor are tested together to ensure the "system" works properly.
This test includes checking that the pump returns to running neutral and
the relief valves are set to the factory specs. After the initial test is
completed, all units are subject to a case pressure test to ensure all gaskets
and the shaft seal are sealing properly. The unit test specifications are
then recorded by model and work order number and maintained on file.
Before the remanufactured pump and motor can be installed on your machine
there are certain steps that have to be taken to ensure your system
and ready. A complete flushing of all lines, reservoirs and valves must
All remanufactured units are shipped either on a pallet or on a custom
built "dogsled" cradle
to ensure no damage takes place during shipping. Careful packaging by
the Hydratec shipping
department means that the units will be ready to go when it arrives at
the final destination.
Our goal at Hydratec is to have you up and running as soon as possible.
We have a large inventory
of hydrostatic pumps and motors in our inventory “ready to ship”
the same day.