Pilot stage
Pilot stage cleaning, jet or flapper alignment, contamination removal from the pilot path, and trim against documented procedures.
Independent Repair Shop. Not Pegasus.
Independent third-party repair of Pegasus servo valves across eight named series: 10, 120, 130, 140, 160, 180, 1060 / 1160 / 1280, and CS. Smaller-brand servo valve specialist with limited factory support on older units. Backed by a 19,000+ unit in-house inventory we pull aftermarket and donor parts from. NC Servo is not affiliated with Pegasus. Working on this kind of hardware since 1975.
Series Map
These are the Pegasus servo valve families that come through often enough to keep donor parts on hand. Size and flow shift series to series, but the rebuild has the same shape: pilot stage, spool, coil, seals, and a run on the test stand before it ships back. Send a part number off the nameplate and we will tell you what is on the shelf.
Service Coverage
Each Pegasus valve is opened, inspected, and rebuilt at the component level. Failed parts come from inventory or pulled off donor units, then the valve runs under pressure on the test stand before it ships back.
Pilot stage cleaning, jet or flapper alignment, contamination removal from the pilot path, and trim against documented procedures.
Spool service, contamination scoring repair, seal kit replacement, and internal-leakage verification on the body.
Pilot stage coil rebuild, connector and cable repair, and feedback wire work on units with feedback loops.
Common Faults
A description of the symptom helps the diagnosis, but a part number is often enough. The categories below cover the kinds of trouble that come in across the Pegasus servo valve series.
| Pilot stage | Pilot-pressure null shift, contamination in the pilot path, jet or flapper damage, or feedback wire wear. |
|---|---|
| Spool and body | Spool wear, contamination scoring, sticky spool action, internal leakage past the spool, or seal failure. |
| Coil and electrical | Burned coils, open windings, damaged connectors, or cable strain at the entry point on long-running units. |
| Age and condition | Heat damage, contamination evidence, hardened seals, and evidence of prior repair attempts on legacy Pegasus units. |
Repair Path
Most Pegasus jobs follow the same four steps. Lead time varies because some repairs need parts pulled off a donor unit, so we only commit to timing once a tech has the valve on the bench.
Phone or email with the Pegasus series and part number, and a quick note on the symptom or what application the valve came off.
Once the unit arrives, a tech opens it, inspects pilot and spool, and runs it on the hydraulic stand to confirm what failed.
We call back with the cost and a rough turnaround. Nothing happens without your sign-off.
Failed components are replaced from inventory or off donors, the valve is verified under pressure, and the unit ships back.
Inventory & Parts Pool
NC Servo's in-house inventory holds over 19,000 valves and drives accumulated since 1975. For a smaller brand like Pegasus, the inventory matters more. It is often the only place a discontinued Pegasus part is going to come from.
More on Pegasus Repair
Pegasus servo valves often share a system with valves from larger brands. The pages below cover related coverage and adjacent valve work.
The full range of servo and proportional valve repair NC Servo handles, across the brands that come through the shop.
A larger, mainstream servo valve brand the shop services. Useful when a Pegasus valve needs a cross-brand replacement.
Another aerospace-grade servo valve brand the shop services. Common alternative when Pegasus is unavailable.
When component-level repair makes sense versus buying new or rebuilt.
Give us a call with the Pegasus series and part number, a photo of the nameplate, or a quick description of the symptom. We will check the shelf, and if we have a rebuilt match you can swap your old one for a discount.
FAQ
A few things customers ask before sending a unit in. Anything not covered, give us a call at 734-326-6666.
No. NC Servo Technology is an independent, third-party repair facility and is not affiliated with, authorized by, or endorsed by Pegasus or any related entities. All Pegasus trademarks are the property of their respective owners.
Pegasus 10 Series, 120 Series, 130 Series, 140 Series, 160 Series, 180 Series, 1060 / 1160 / 1280 Series, and CS Series. Send the part number off the nameplate and we will tell you what we have.
Yes. Pegasus is a smaller-brand servo valve specialist, and a lot of its hardware is no longer factory-supported. We rebuild discontinued Pegasus units with parts from inventory or pulled off donor units.
Most failures are hardware, and the unit comes back working with its program intact. Corrupted programs are rare; if one is already corrupted before the unit reaches us, that's the one thing we can't recover.
It varies. NC Servo is a small independent shop, and lead time depends on the valve, what is wrong with it, and whether parts have to come off a donor unit. Give us a call once the unit ships in, and we can give a current estimate after a tech has looked at it.
If the valve is not fixable, we will let you know and help source a replacement: a rebuilt match if we have one on the shelf, or a comparable Pegasus or cross-brand alternative.
One year on parts and workmanship for repairs and rebuilt units. Standard exclusions apply for contamination, improper installation, and out-of-spec operation. Flushing and filtering the hydraulic system before reinstalling a repaired valve is recommended.
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