Oilgear Pump Parts Guide: PVG, PVWH & PVWJ Series (Hard-to-Find Specialist)

Oilgear is a niche industrial brand known for heavy-duty, high-pressure piston pumps — and because many of its units are decades old, parts can be genuinely hard to find. Correctly identifying your Oilgear pump series is the first step to sourcing the right cartridge, seal kit, or replacement. This guide covers the main Oilgear families and how to read them.

Oilgear piston pump series

Oilgear's catalog is built around variable-displacement axial piston pumps. The most common series RestoPower supports include:

• PVG – a widely used variable-volume piston pump line.
• PVV – variable-volume units for industrial power systems.
• PVWJ / PVWH – heavy-duty high-pressure pumps common on presses and mills.
• PVM / PVK – compact variable pumps for tighter installations.
• PVWW / PVWC – large-frame pumps for demanding continuous-duty applications.

How to read an Oilgear model number

Oilgear codes lead with the series prefix (for example PVG or PVWH), followed by fields that define displacement, control or compensator type, porting, and shaft configuration. Because Oilgear built many custom and legacy variants, transcribe the entire nameplate string exactly — even a worn or partial number helps us narrow down the correct Oilgear piston pump parts.

Why Oilgear parts are hard to find

Oilgear is a specialized brand, and many of its components are no longer stocked through mainstream channels. Sourcing exactly these obsolete and hard-to-find parts is a RestoPower specialty. If your tag is missing, measure the shaft, mounting pattern, and port sizes and note the pump's overall dimensions so we can cross-reference the correct unit or Oilgear seal kit.

Find your Oilgear parts at RestoPower

We stock aftermarket, OEM-equivalent Oilgear piston pump parts and Oilgear seal kits, backed by a 2-year no-hassle warranty and same or next-day shipping from Lake Orion, MI. Browse Oilgear parts or browse all hydraulic parts, and send us your full model number for a same-day quote — even the hard-to-find ones. Request a quote or download Oilgear parts catalogs and rebuild guides for exploded views and service data.

Oilgear seal kits vs. cartridge and rotating-group parts

The first repair on most Oilgear PVG, PVWH, and PVWJ pumps is a hydraulic seal kit that replaces the shaft seal, cover O-rings, and static seals to stop leaks. When a pump loses pressure, overheats, or grows noisy, the wear has usually reached the axial-piston rotating group — the cylinder block, pistons, valve plate, or bearings. On high-pressure Oilgear units these components take a lot of load, so a seal kit alone will not restore output once they are worn. Confirming whether you need seals only or a full rebuild set avoids a repeat teardown; send us the complete nameplate string and we will tell you exactly which Oilgear parts your pump requires.

Oilgear applications and common failure signs

Oilgear axial-piston pumps are built for high-pressure, continuous-duty work — hydraulic presses, steel-mill equipment, die-casting machines, and heavy industrial power units. Because they run hard for years, the failures we see most are contamination wear on the pistons and valve plate, cavitation from restricted inlets, and shaft-seal leaks from age. A pump that seeps at the shaft usually needs a seal kit; one that builds pressure slowly or loses flow under load typically has a worn rotating group; and a whining or knocking pump should be checked for cavitation before parts are replaced. Since many Oilgear components are obsolete through original channels, we source hard-to-find and OEM-equivalent parts so legacy machines stay in production.

Related guides

• Racine Hydraulic Pump Guide: PVQ, PVB, PVS & PVF Series
• Denison Hydraulic Pump Guide: Gold Cup, T6 & T7 Series
• Bosch Rexroth Pump Guide: A10VSO, A4VG & A11VO Series

Frequently asked questions

What Oilgear pump series does RestoPower carry?
We support aftermarket OEM-equivalent parts for Oilgear PVG, PVE, PVWH, and PVWJ series piston pumps, among others.

Are Oilgear parts really that hard to find?
Oilgear is a niche industrial brand and many parts are difficult to source. RestoPower specializes in exactly these hard-to-find components — send us your full model number and we will locate them.

What warranty do Oilgear parts carry?
All of our aftermarket Oilgear parts carry a 2-year no-hassle replacement warranty, with in-stock items shipping same or next business day.