Vickers 20V Single Vane Pump: Parts Catalog, Service Data & Rebuild Guide

Vickers 20V Vane Pump: Parts Catalog, Service Data & Rebuild Guide

The Vickers 20V single vane pump is the compact frame in the V series industrial range, built around the same replaceable cartridge kit principle as the larger 25V, 35V and 45V. A 20V rebuild is a cartridge job: the cam ring, rotor, vanes and side plates come as a matched set, which is what makes these pumps economical to rebuild rather than replace. RestoPower supplies OEM or aftermarket equivalent cartridge kits, vane kits, cam rings, rotors, shafts, bearings and seal kits for every 20V displacement code.

Exploded View and Parts Diagram

Vickers 20V vane pump exploded view diagram with 10 vane kit, shaft seal 394976, bearing 1704, foot bracket 199491 and outlet cover bolt torque

Vickers 20V exploded view. Every part number and torque figure quoted on this page is read directly off this drawing.

Key Part Numbers From the Diagram

394976 Shaft Seal. Assemble with the spring loaded sealing member toward the bearing
1704 Bearing
370084 Washer
98653 Retaining Ring
109975 Lock Ring
419672 Sealing Ring. Install into the body first, then fit the cartridge kit
154026 O-Ring
154090 O-Ring
588506 Back-up Ring
158465 Pin, 2 required
289473 Screw, 2 required
1296 Outlet cover bolt, 4 required
199491 Foot Bracket, optional
199740 Foot bracket screw, 2 required

The vane kit, ring, rotor, inlet support plate and outlet support plate are selected by your displacement code. Give us your full model number and we will identify the right cartridge kit, or use the service data PDF below.

Vickers 20V Torque and Assembly Specs

Item Value
1296 Outlet cover bolt (4 req'd) Oil the threads, then torque to 54-68 N.m (40-50 lb.ft)
Vane count 10 vanes and inserts per cartridge
Shaft seal 394976 Spring loaded sealing member toward the bearing. Wet the seal completely with oil before assembly
Sealing ring 419672 Install into the body before the cartridge kit goes in

Download the Service Data PDF

How to Rebuild a Vickers 20V Vane Pump

A 20V rebuild is a cartridge job. The wearing parts, cam ring, rotor, vanes and the two side plates, come as a matched cartridge kit, and the correct repair is to replace that kit rather than individual pieces. Budget two to three hours.

Step 1: Clean and Drain

Wash the outside of the pump before anything comes apart and drain the remaining oil. Grit left on the housing will find its way into the new cartridge. Read the drained oil: bronze glitter points to the cartridge or bearing, steel points to the shaft or rotor.

Step 2: Mark Orientation and Remove the Outlet Cover

Scribe the cover to housing relationship and the port positions before undoing anything, because a 20V can be reassembled rotated. Remove the four 1296 outlet cover bolts evenly in a crossing pattern and lift the cover straight off.

Step 3: Withdraw the Cartridge Kit

Lift out the cartridge as an assembly: inlet support plate, cam ring, rotor with its 10 vanes and inserts, and the outlet support plate. Note which face of the cam ring pointed toward the cover, because the ring is directional and a reversed ring will not pump correctly. The two 158465 pins locate the cartridge; check they are not picked up in the cover.

Step 4: Shaft, Bearing and Seal

Remove lock ring 109975 and retaining ring 98653, then press the shaft out from the drive end. Inspect the shaft seal running surface for a wear groove, since a grooved shaft will leak straight through a new seal. Replace bearing 1704 and shaft seal 394976 as a matter of course on a full rebuild.

Step 5: Inspect and Decide

  • Cam ring: look for a wear step at the two lift zones. Any ridge you can feel with a fingernail condemns the whole cartridge kit.
  • Rotor slots: check for bell mouthing at the outer edge, which lets the vanes cock and chatter.
  • Vanes and inserts: chipped or rounded leading edges mean the pump has been running cavitated. Fix the inlet or it will happen again. The 20V vane kit covers all 10.
  • Side plates: scoring or bronze pickup on the running faces condemns them.
  • Housing bore: check for fretting where the cartridge locates, and for a damaged seat for sealing ring 419672.

Step 6: Reassemble and Torque

  • Fit a complete new cartridge kit. Never mix a new cam ring with old vanes; they wear as a matched set.
  • Install sealing ring 419672 into the body first, then fit the cartridge kit. Doing it in the other order traps or cuts the ring.
  • Install all new seals and O-rings from the seal kit, lubricated with clean hydraulic oil rather than grease.
  • Fit shaft seal 394976 with the spring loaded sealing member facing the bearing, and wet the seal completely with oil before it goes in. Use a proper seal driver so it is not cocked.
  • Confirm the two 158465 locating pins are seated before the cover goes on.
  • Prefill the housing with clean oil, then oil the threads and torque the four 1296 cover bolts to 54-68 N.m (40-50 lb.ft) evenly in a crossing pattern.

Step 7: Test and Run In

Turn the shaft by hand; it should rotate smoothly with no tight spots. Start the machine unloaded at low speed, bleed the circuit, and confirm the pump primes within a few seconds. Run unloaded for several minutes before applying pressure, and check for shaft leaks and case temperature.

Common 20V Faults and the Parts That Fix Them

  • Whining or chattering under load: worn cam ring and vanes, or a restricted inlet. Check the inlet first.
  • Oil weeping at the shaft: worn shaft seal 394976, or a grooved shaft if the leak returns quickly.
  • Low flow at rated speed: worn cartridge kit.
  • Pump will not prime: air leak on the suction side, or vanes stuck in the rotor slots.
  • Leak at the cover joint after rebuild: sealing ring 419672 fitted after the cartridge instead of before it.
  • Repeat cartridge failure: almost always contamination or cavitation, not the parts.

Vickers 20V Specifications

  • Type: Fixed displacement balanced vane pump
  • Vanes: 10 vanes and inserts per cartridge
  • Outlet cover bolt torque: 54-68 N.m (40-50 lb.ft), threads oiled
  • Shaft seal: 394976
  • Bearing: 1704
  • Compatible brands: Vickers, Eaton Vickers, Danfoss legacy
  • Applications: Machine tools, industrial presses, injection molding, mobile hydraulics

Shop OEM or Aftermarket Equivalent 20V Replacement Parts

Frequently Asked Questions

How do you rebuild a Vickers 20V vane pump?

Drain and clean the pump, scribe the cover orientation, remove the four 1296 outlet cover bolts and withdraw the cartridge kit, replace shaft seal 394976 and bearing 1704, fit a complete new cartridge kit, install sealing ring 419672 into the body before the cartridge goes back in, then oil the threads and torque the cover bolts to 54-68 N.m and run the pump in unloaded before applying pressure.

What is the cover bolt torque on a Vickers 20V?

54 to 68 N.m, which is 40 to 50 lb.ft, on the four 1296 outlet cover bolts. The drawing specifies oiling the threads before torquing, and the bolts are tightened evenly in a crossing pattern.

How many vanes does a Vickers 20V have?

Ten. The 20V vane kit contains all 10 vanes and their inserts as a matched set. This is one of the differences from the larger 35V and 45V frames, which use 12.

Which way round does the 20V shaft seal go?

Shaft seal 394976 is assembled with the spring loaded sealing member facing toward the bearing, and the seal must be completely wetted with oil before assembly. Use a seal driver rather than a socket so the seal is not cocked in its bore.

Related Catalogs

Need help finding the right parts? Contact us at info@restopower.com or call (810) 882-1171 and we will confirm fitment the same day.