All Parker gearheads ship lubricated unless ordered as custom.
Lubrication change is typically not necessary and the seal will need to be changed before the lubrication needs to be changed. For the most part, you can leave the lubricant in for the life of the product as long as the gearbox is not leaking.
Typically the only time the lubricant breaks down is if it is exposed to extreme conditions (temperatures).
Seal life is more dependent on friction wear of the seal lip against the rubbing surface, such as the output seal rubbing against output shaft, input seal rubbing against the out diameter of the pinion gear. O-rings don't typically wear out between housing surfaces but can dry at elevated temperatures (180C).
Temperature can also play a role in it over time. The proper oil fill within the gearhead engages the seals and prevents premature seal failure.
Gearbox Lubrication
| Gearhead | Lubricant | Manufacturer | Description |
| All Stealth Gen II gearheads | SHC630 | Mobil | Wide temperature synthetic oil for gears and bearings. Orange in color. |
| Stealth Gen I gearheads after July 2002 | SHC630 | Mobil | Wide temperature synthetic oil for gears and bearings. Orange in color. |
| Stealth Gen I gearheads until July 2002 | Synthetic Nyogel 792D | Nye Lubricants | Wide temperature synthetic grease for gear trains, gear motors and planetary gears. White in color. |
| PV gearheads | Synthetic Rheolube 363AX-1 | Nye Lubricants | Formulated for wide temperature stability and to reduce oil separation. Olive to light brown in color. |
| PG and RA (60 and 90) after 2002 | Mobil 28 | Mobil | Wide temperature synthetic grease for gears and bearings. Red in color. |
| PG and RA (115 and larger) after July 2002 | Synthetic Nyogel 792D | Nye Lubricants | Wide temperature synthetic grease for gear trains, gear motors and planetary gears. White in color. |
| PG and RA until July 2002 | Mobil 28 | Mobil | Wide temperature synthetic grease for gears and bearings. Red in color. |
| NEMA gearheads (NE and NR) | Synthetic Rheolube 363AX-1 | Nye Lubricants | Formulated for wide temperature stability and to reduce oil separation. Olive to light brown in color. |
| Vacuum-rated | Synthetic Nyogel 717C | Nye Lubricants | Vacuum rated and useful for high temperature electrical contacts. |
| Low temperature applications | Synthetic Flouroether Grease 899S-1 | Nye Lubricants | High Temperature stability and wide temperature fluidity. |
| Certain Stealth Gen I gearheads (142 and larger)* | Synthetic Gear Oil 345 | Nye Lubricants | Formulated for wide temperature service and heavily-loaded applications. |
* Very few Stealth Gen I gearheads ever used Synthetic Gear Oil 345. It is not commonly encountered.
Stealth Gen II Oil Fill
| Gearhead | Single Stage (10:1 or less) | Dual Stage (12:1 to 100:1) |
| RS60 / RX60 / RX23 | 58 mL | 58 mL |
| RS90 / RX90 / RX34 | 160 mL | 160 mL |
| RS115 / RX115 / RX42 | 340 mL | 340 mL |
| RS142 | 760 mL | 760 mL |
| PS60 / PX60 / PX23 | 28 mL | 48 mL |
| PS90 / PX90 / PX34 | 62 mL | 105 mL |
| PS115 / PX115 / PX42 | 130 mL | 220 mL |
| PS142 | 200 mL | 450 mL |
Parker gearheads are precision gearheads and should not be disassembled in the field. We do offer repairs and an expedite service for urgent repairs. Contact your local Parker Automation Technology Center (ATC) for repair Return Material Authorization (RMA) number to have the gearhead serviced.
For Stealth Gen I oil fill level, see user guide (on product page).
Before July 2002, the Stealth Gen I gearheads part numbers either ended with nothing after the ratio for standard backlash units, or -LB for low backlash units.
After July 2002, the Gen I gearheads were internally redesigned for oil fill for longer life. The part numbers then ended in -SH, -SU, -SD, -SE, -SF for standard backlash and the orientation (horizontal, up, down, E/F for right-angle); or for low backlash units -LH, -LU, -LD, -LE, -LF.
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