Product Description
OEM-Equivalent Major Repair Kit for Leybold D4B Vacuum Pumps - G11
Complete Major Overhaul Kit for Leybold D4B
Includes replacement vanes, shaft seals, gaskets, O-rings, springs, sight glass, coupling insert, demister filter, valve components, and other critical wear items.
Restore vacuum performance, reduce downtime, and extend the service life of your Leybold D4B vacuum pump with this OEM-equivalent major repair kit. This kit contains the key components commonly replaced during a complete rebuild while offering a cost-effective alternative to purchasing OEM parts individually.
This Leybold D4B OEM-equivalent repair kit is ideal for maintenance departments, vacuum pump repair shops, laboratories, universities, OEMs, manufacturers, and industrial users looking to rebuild their pump instead of replacing it.
Major Kit Includes:
- Replacement vanes
- Shaft seals
- Gaskets and O-rings
- Springs
- Sight glass and sight glass gasket
- Coupling insert and coupling gasket
- Demister filter
- Pressure relief valve
- Exhaust valve plate
- Non-return valve
Compatible Pump Model
- Leybold D4B
When Should You Rebuild a Leybold D4B?
- Reduced vacuum performance
- Slow pump-down times
- Oil leaks around seals, covers, or gaskets
- Excessive exhaust smoke or oil mist
- Worn, chipped, or damaged vanes
- Noise, vibration, or rough operation
- Contaminated oil or heavy service use
- Scheduled preventative maintenance interval reached
Complete Bill of Materials
The following components are included in this OEM-equivalent Leybold D4B major repair kit.
| Part Number | Description | Qty |
|---|---|---|
| PL23970509 | O-Ring, Viton, 70 x 5 mm | 1 |
| 23973043 | Gasket | 1 |
| 23973044 | Gasket, Flat | 1 |
| 23973047 | Case Gasket | 1 |
| 23973057 | Sight Glass Gasket | 1 |
| PL23970176 | O-Ring, Viton, 18.42 x 5.33 mm | 2 |
| PL23970147 | O-Ring, Viton, 16 x 2.5 mm | 1 |
| PL23970015 | O-Ring, Viton, 40 x 1.5 mm | 1 |
| PL23953006 | Shaft Seal, Viton | 2 |
| PL22161040 | Stainless Steel Spring | 1 |
| PL22161031 | Split Spring | 1 |
| PL20039220 | Vane, 1st & 2nd Stage | 4 |
| PL20010731 | Coupling Gasket | 1 |
| PL20009244 | Oil Nozzle | 1 |
| PL20009111 | Shaft Sleeve Collar | 1 |
| PL20009110 | Coupling Insert | 1 |
| PL20010730 | Beaded Gasket, Mylar | 1 |
| P23970108 | O-Ring, Viton, 12 x 1.5 mm | 2 |
| P23955165 | Gasket, Viton | 3 |
| PL40175023 | Pressure Relief Valve | 1 |
| PL15108035 | Felt Pad | 1 |
| PL40175014 | Exhaust Valve Plate | 1 |
| PL40159003 | Valve Plate | 1 |
| PL39350019 | Silencer Nozzle | 1 |
| PL39026010 | Demister Filter | 1 |
| PL35001179 | Sight Glass | 1 |
| PL34861029 | Seal | 1 |
| PL34861028 | Non-Return Valve | 1 |
| PL23973146 | Seal, Float - Viton | 1 |
| PL23970163 | O-Ring, Viton, 38 x 2 mm | 2 |
Recommended Vacuum Pump Oil
Use Fresh Oil After Rebuild
Fresh vacuum pump oil should always be installed after rebuilding a Leybold D4B vacuum pump. Contaminated or incorrect oil can shorten the life of new vanes, seals, gaskets, and valve components.
- M100 Vacuum Pump Oil - Standard mineral oil recommendation for many Leybold D-series rotary vane applications
- S100 Synthetic Vacuum Pump Oil - Synthetic option for more demanding applications
- Vacuum Pump Oil Cross Reference Chart - Match OEM oil to VPS equivalents
Complete Rebuild Package Available
Need everything required for a complete Leybold D4B service? Vacuum Pump Supply can help package this OEM-equivalent major repair kit with the correct vacuum pump oil and related service items.
- OEM-equivalent Leybold D4B Major Repair Kit - G11
- M100 Vacuum Pump Oil
- Optional synthetic oil upgrade
- Additional filters or service items if required for your application
Why Buy from Vacuum Pump Supply?
Vacuum Pump Supply has supplied vacuum pump repair kits, parts, filters, and oils since 2006. Our OEM-equivalent kits are trusted by maintenance departments, laboratories, universities, manufacturers, and vacuum pump service companies throughout North America.
- Vacuum pump specialists since 2006
- Over 15,000 vacuum pump parts and kits available
- OEM and OEM-equivalent options
- Fast shipping on stocked products
- Technical support from vacuum pump specialists
- Trusted by manufacturers, laboratories, universities, service companies, and maintenance teams
Helpful Resources
- Vacuum Pump Oil Cross Reference Chart
- Vacuum Pump Schematics, Manuals & Repair Resources
- Rotary Vane Vacuum Pump Repair Kits & Parts
- Leybold Vacuum Pump Parts & Kits
- Vacuum Pump Oil
Frequently Asked Questions
What pump is this kit for?
This OEM-equivalent major repair kit is for the Leybold D4B vacuum pump.
Is this a major repair kit?
Yes. This kit includes vanes, shaft seals, gaskets, O-rings, springs, sight glass, coupling insert, demister filter, valve components, and other parts used during a major overhaul.
Does this kit include vanes?
Yes. This kit includes four vanes, part number PL20039220, for the first and second stage.
Does this kit include shaft seals?
Yes. This kit includes two Viton shaft seals, part number PL23953006.
Does this kit include a demister filter?
Yes. This kit includes one demister filter, part number PL39026010.
What oil should I use after rebuilding a Leybold D4B?
For many Leybold D-series rotary vane applications, M100 vacuum pump oil is a standard recommendation. Oil selection should always be confirmed based on the pump application and operating conditions.
Should I change the oil during a rebuild?
Yes. Fresh oil should always be installed after a major overhaul to help protect new vanes, seals, valves, and internal pump components.
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OEM-Equivalent Leybold D4B Major Repair Kit G11 | Vanes, Seals & Demister Filter
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OEM-equivalent major repair kit for Leybold D4B vacuum pumps. Includes vanes, shaft seals, gaskets, O-rings, springs, sight glass, coupling insert, demister filter, valve components and more.
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