Sundstrand 81020S07 Cylinder Block Kit Series 90 75cc Pump

Sundstrand 81020S07 Cylinder Block Kit for the Sundstrand (Sauer-Danfoss) Series 90 75 cc pump.

Danfoss PowerSource describes it as a rotating group kit with welded pistons.

Specifications

OEM Part Number	81020S07
Part Type	Cylinder Block Kit
Brand	OEM or aftermarket equivalent to Sundstrand / Danfoss
Series	Series 90, 75 cc
Used On	Series 90 75 cc pump
Danfoss Status	Discontinued (Danfoss PowerSource)
Service Data Source	Danfoss SB-1993-012 (520L0838, p. 92) and SB-2005-018 (Series 90 75 cc Motor Parts Manual 520L0892, p. 87); Danfoss PowerSource, checked 2026-10-26 (KIT-ROT.GP W/WELDED PISTONS, discontinued; Danfoss names 8510365)
Condition	New
Availability	Available to order, request a quote for current price and lead time

Compatible With

Sundstrand / Sauer-Danfoss Series 90 75 cc pump

Cross Reference

81020S07, Sundstrand 81020S07, Sauer-Danfoss 81020S07, Danfoss 81020S07, 8510365, Danfoss 8510365

Common Applications

Industrial hydraulic power units and machinery
Mobile, construction and agricultural equipment
Pump rebuilds and scheduled overhauls

Guides & Catalogs

Sundstrand Series 90 PartsSeries 90 pump and motor parts and seal kits.View parts →Series 90 Model Code DecoderRead a Series 90 nameplate code position by position.Decode a model code →Sundstrand Piston PumpsSeries 15 to 90, by series and frame.Browse series →Identify Your Sundstrand UnitFind the model code, serial number and date code on the nameplate.Read the guide →Shop All Sundstrand PartsPumps, motors, seal kits and repair parts.Browse parts →

Frequently Asked Questions

Will Sundstrand 81020S07 fit my unit?
It is the number Danfoss lists for the units above. Send the model code, serial number and date code from your nameplate to info@restopower.com and we will confirm fitment before you order. Danfoss changed several parts by date code, so the date code decides which number your unit takes.

Is the valve plate in this kit?
No. Danfoss service bulletin SB-1993-012 took the valve plate out of the Series 90 variable pump cylinder block kits, so it is ordered separately. Send us your model code and we will match the valve plate.

Why is there no price shown?
This part is quoted rather than stocked on the shelf. Send us the part number and we will come back with current price and lead time. A request for a quote does not mean we cannot get it.

What if my pump or motor came off OEM equipment?
Check before you order. Sundstrand and Danfoss built special versions for equipment makers, and some of those use parts that differ from the standard unit. Send the full model code and serial number and we will check it against the Danfoss data first.

About RestoPower

RestoPower specializes in hard-to-find and obsolete hydraulic components, Parker, Vickers, Eaton, Denison, Char-Lynn, Oilgear, Rexroth, Sundstrand and more. Email info@restopower.com or call (810) 882-1171 for fitment help.