Where to Buy Sundstrand and Sauer-Danfoss Parts

You can buy Sundstrand and Sauer-Danfoss hydraulic pump parts and seal kits from RestoPower, an independent hydraulic parts supplier and rebuild shop in Lake Orion, Michigan, with over 600 Sundstrand parts listed and overhaul seal kits for Series 20, 21, 22, 23, 26 and 90 on the shelf. For obsolete series such as 15, 40, 45 and 51, send us the model number and date code from the nameplate and we reply with price, availability and lead time.

The short answer: seal kits for Series 20, 21, 22, 23, 26 and 90 ship from stock. Series 18 and 42 parts are listed and quoted. Everything else is sourced to order from the nameplate. Send us the plate, and include the date code.

Sundstrand, Sauer-Sundstrand, Sauer-Danfoss or Danfoss: which do I search for?

All four. They are one product lineage: Sundstrand's hydrostatic business became Sauer-Sundstrand, then Sauer-Danfoss, and is now part of Danfoss Power Solutions. The part numbering carried across, so a Series 20 pump stamped Sundstrand takes the same service parts as one stamped Sauer-Danfoss. Do not mix this line up with Char-Lynn orbital motors, which Danfoss also owns but which use completely different numbering; those are on our Char-Lynn and Danfoss motor guide.

What Sundstrand parts does RestoPower carry?

"On the shelf" means priced and ready to ship. "Listed, quoted" means the part is cataloged with its Sundstrand number and priced when you ask. "Sourced to order" means we do not list it, but we go and find it.

Series What we list How it is supplied
Series 15 Nothing listed Sourced to order
Series 18 Over 180 parts, including charge pump kits, charge pump housings and charge pump shafts Listed, quoted
Series 20 (SPV2/033) Pump overhaul seal kit 9510224, fixed motor overhaul seal kit 9510225, charge pump gasket 9801235 On the shelf
Series 21 (SPV2/052) Pump seal kit 9510227, fixed motor shaft 9210468, charge pump gasket 9801235 On the shelf
Series 22 (SPV2/070) Pump seal kit 9510230, charge pump gasket 9801235 On the shelf
Series 23 (SPV2/089) Pump seal kit 9510233, shaft seal 9510190, charge pump gasket 9801235 On the shelf
Series 24 (SPV2/119) Trunnion shim kit 9510422-0005 On the shelf; seal kits sourced to order
Series 25 and 27 Nothing listed Sourced to order
Series 26 (SPV2/227) Pump seal kit 9510316, pump shaft 9260140 On the shelf
Series 40 and 45 Nothing listed Sourced to order
Series 42 Over 400 parts, including charge pump covers and gaskets and SCR valves Listed, quoted
Series 51 bent axis motors Nothing listed Sourced to order
Series 90 Pump overhaul seal kits 80020S30 (55 cc), 81020S30 (75 cc) and 11035669 (100 cc) On the shelf; other sizes sourced to order

The full range, with displacement and pressure by series, is on the Sundstrand brand hub, and the kits are gathered on Sundstrand seal kits.

Can you get charge pump parts for Sundstrand pumps?

Yes, for the series we catalog. The Series 18 charge pump kits, housings and shafts and the Series 42 charge pump covers and gaskets are listed with their Sundstrand numbers and quoted on request. The gear-type charge pump gasket 9801235, the same part on Series 20, 21, 22 and 23 pumps in Danfoss parts manual 520L0910, is on the shelf. For any other series, send the model number and date code. A charge pump that cannot keep up shows as a slow or weak drive in both directions, so check it before you blame the rotating group; our hydrostatic transmission troubleshooting guide walks through it.

Can you get obsolete Sundstrand and Sauer-Danfoss parts?

Often, and the date code is what makes it work. On these units the same item in the parts list can carry several part numbers over the years, and the one you need is set by the date code on the nameplate, not the model number. That is why we ask for it every time. A few more things worth knowing:

  • Kits get superseded. On the Series 90 100 cc pump, Danfoss service bulletin SB-2007-018 moved the overhaul seal kit from 82020S30 to 11035669 as part of a redesign that took effect at serial number A-07-28-xxxxx. The new kit services both the old and the new design pumps, but the redesigned hard parts (servo arm, housing, swashplate, cradle bearing and screws) do not interchange between the two designs. An old number in a manual is a starting point, not a dead end, and the serial on the plate tells us which side of a change your unit is on.
  • Pump, fixed motor and variable motor kits differ. A Series 20 fixed motor takes a different overhaul kit from the Series 20 pump. Tell us which unit the kit is for.
  • Some series were never broken out for service. When a part cannot be had, a rebuild or a matched replacement may be the only route. We tell you which way we think it should go.

Factory parts manuals for Series 20 through 27 are free downloads: variable pump parts, 520L0910 (PDF), fixed motor parts, 520L0911 (PDF), variable motor parts, 520L0912 (PDF) and the Series 20 pump service manual, L1003506 (PDF). Every other publication we reference is in the Sundstrand document reference index.

Are your Sundstrand parts genuine or aftermarket?

RestoPower is an independent supplier, not a Danfoss distributor or factory outlet. Most of what we sell for Sundstrand units is new aftermarket, OEM-equivalent parts made to the Sundstrand or Danfoss part number, and every listing shows the number it replaces. When a genuine factory part is what you need, ask: we quote genuine where it is available and always tell you which one you are buying.

What do I need to send to get the right Sundstrand part?

A photo of the nameplate with the model number, serial number and date code all readable. Tell us whether the unit is a pump, a fixed motor or a variable motor, and what machine it is on. If the plate is gone, photos of the unit, the shaft and the control give us somewhere to start. These guides help:

Can you rebuild my Sundstrand pump or motor instead?

Yes. A hydrostatic unit that has lost its rotating group usually needs more than a seal kit. Repairs happen in our shop in Lake Orion, Michigan, or through the RestoPower repair network, and we arrange getting the unit to the shop doing the work. The teardown evaluation is free, you get a firm, itemized quote before any billable work, and work done in our shop carries a 1-year repair warranty. For a network job, the price, turnaround and warranty are confirmed on your quote before work starts. If you are replacing the unit instead, our core buyback program gives credit for the old one.

Frequently asked questions

Where can I buy Sundstrand hydraulic pump parts and seal kits, including obsolete ones?

RestoPower, an independent supplier and rebuild shop in Lake Orion, Michigan, lists over 600 Sundstrand and Sauer-Danfoss parts, with overhaul seal kits for Series 20, 21, 22, 23 and 26 and Series 90 55, 75 and 100 cc pumps on the shelf. For obsolete series such as 15, 40, 45 and 51, send the model number and date code and we reply with price, availability and lead time.

Are Sundstrand and Sauer-Danfoss parts the same?

Yes. Sundstrand became Sauer-Sundstrand, then Sauer-Danfoss, and is now part of Danfoss Power Solutions, and the part numbering carried across. Which part number your unit needs is set by the date code on the nameplate, so send that with the model number.

Which Sundstrand parts are in stock?

In-stock parts ship within 24-72 hours. Today that includes overhaul seal kits for Series 20 pump and fixed motor, Series 21, 22, 23 and 26 pumps, Series 90 kits 80020S30, 81020S30 and 11035669, the Series 23 shaft seal 9510190, Series 21 and 26 shafts, a Series 24 trunnion shim kit and the 9801235 charge pump gasket. Series 18 and 42 parts are listed and quoted.

Do you have Series 15 or Series 40 parts?

We do not list Series 15, 40, 45 or 51 parts today; they are sourced to order. Send the model number and date code from the nameplate and we come back with price, availability and lead time, or tell you straight if the part cannot be had.

Do you sell Sundstrand charge pump parts?

Yes. Series 18 charge pump kits, housings and shafts and Series 42 charge pump covers are listed and quoted on request, and the 9801235 charge pump gasket for Series 20, 21, 22 and 23 is on the shelf. Other series are sourced to order.

Can you rebuild my Sundstrand pump or motor?

Yes. Repairs happen in our shop or through the RestoPower repair network, and we arrange getting the unit to the shop doing the work. The teardown evaluation is free, you get a firm, itemized quote before any billable work, and work done in our shop carries a 1-year repair warranty.

What warranty do Sundstrand parts from RestoPower carry?

In-stock parts carry a 2-year warranty. Repair work done in our shop carries a separate 1-year repair warranty.

Send us a Sundstrand nameplate

Send a photo of the nameplate with the model number and date code, and tell us whether it is a pump or a motor. We reply with price, availability and lead time. In-stock parts ship within 24-72 hours and in-stock parts carry a 2-year warranty. If the unit needs a rebuild, the teardown evaluation is free, you get a firm, itemized quote before any billable work, and work done in our shop carries a 1-year repair warranty.

Request a quote · (810) 882-1171 · Repair and rebuild service

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