Vickers 25VT Thru-Drive Vane Pump: Parts Catalog, Service Data & Rebuild Guide

The Vickers 25VT is the thru-drive version of the 25V fixed displacement vane pump. A thru-drive carries the input shaft straight through the pump so a second pump can be bolted to the back and driven from the same motor, which is why the parts that define a 25VT build are the adapter plate, coupling and, on BP models, a spacer. The pumping cartridge itself is a standard 25V section with a 12 vane rotor. RestoPower supplies OEM or aftermarket equivalent cartridge kits, vane kits, adapter kits, coupling kits and seal kits for every 25VT variant.

Exploded View and Parts Diagram

Vickers 25VT thru-drive vane pump exploded view diagram with adapter plate, coupling and spacer kit table, seal kit table and bolt torque values

Vickers 25VT thru-drive assembly showing the A and B adapter plates, coupling and the BP spacer parts. Every part number and torque figure quoted on this page is read directly off this drawing.

Adapter, Coupling and Spacer by Thru-Drive Type

This table is what makes a 25VT job different from a plain 25V. Identify your thru-drive type first.

Type	Adapter Plate	Adapter Kit	Spacer Kit	Retaining Ring	Coupling	Coupling Kit
VTA	584936	941296	-	223172	426770	02-136810
VTB	584922	941297	-	89447 (1 req'd)	584926	02-136811
VTBP	584922	941297	02-136817	89447 (2 req'd)	452865	02-136812

Note printed on the drawing: for BP models an adapter kit AND a spacer kit are both required. Ordering the adapter kit alone will leave you short on a BP build.

Seal Kits by Model

Model	Seal Kit	F3 Seal Kit
25VTA	920189	920190
25VTB	920191	920192
25VTBP	02-136927	02-136928

Cartridge and Common Parts

02-136719	Vane Kit, includes 12 vanes and inserts
584618	Rotor
591016	Inlet Plate S/A
229662	Pin, 2 required
289472	Screw, 2 required
351776 / 154086 / 353409 / 154088	O-Rings

BP models only: spacer 588725, O-ring 375422, washer 427700 and screw 205436 (2 req'd). Parts prefixed with a symbol on the drawing are available only as part of a kit.

Useful cross reference: the 25VT cartridge uses the same rotor 584618, inlet plate 591016 and vane kit 02-136719 as the shaft end of a 2520V double pump. The ring is selected by displacement code.

Vickers 25VT Torque Specs

Fastener	Torque
38523 Bolt (4 req'd)	88.1-101.7 N.m (65-75 lb.ft)
298147 Bolt (4 req'd), adapter plate	55.2-67.8 N.m (40-50 lb.ft)

The adapter plate bolts appear at both the A and B adapter positions, and both take the same 55.2-67.8 N.m figure.

Download the Service Data PDF

How to Rebuild a Vickers 25VT Thru-Drive Vane Pump

A 25VT rebuild is a standard 25V cartridge job plus the thru-drive hardware at the back. Rebuild the pumping section as normal, then give the coupling and adapter their own inspection, because a worn coupling is the fault that most often brings a thru-drive back a second time. Budget three hours.

Step 1: Identify Your Thru-Drive Type

Before you order anything, work out whether you have a VTA, VTB or VTBP. The adapter plate, coupling, retaining ring count and seal kit all change with the type, and a BP build additionally needs a spacer kit. Getting this wrong is the single most common ordering error on a 25VT.

Step 2: Clean, Drain and Mark

Wash the outside of the pump before anything comes apart and drain the remaining oil. Read the drained oil: bronze glitter points to the cartridge or bearing, steel points to the shaft, rotor or a failing coupling. Scribe the cover to housing relationship and the port positions, and mark the adapter plate orientation.

Step 3: Remove the Rear Pump and Adapter

Remove the second pump if one is fitted, then undo the four 298147 adapter plate bolts and lift the adapter plate off. Recover the coupling and its retaining ring, noting how many rings your build uses: one on a VTB, two on a VTBP. On a BP build also recover spacer 588725, washer 427700 and the two 205436 screws.

Step 4: Withdraw the Cartridge Kit

Undo the four 38523 bolts and lift the cover straight off, then withdraw the cartridge as an assembly: inlet plate 591016, cam ring, rotor 584618 with its 12 vanes and inserts, and the outlet plate. Note which face of the cam ring pointed toward the cover, because the ring is directional. The two 229662 pins locate the cartridge.

Step 5: Inspect the Cartridge and the Coupling

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. Vane kit 02-136719 covers all 12.
Coupling: inspect the splines for wear, twist or rounding. This is the part a thru-drive kills, and a worn coupling will chew the splines on a new rear pump within hours. Replace it with the coupling kit for your type rather than the bare coupling.
Adapter plate pilot: check the register bore for fretting, which lets the rear pump run misaligned.

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.
Fit all new seals from the seal kit for your model: 920189 on a VTA, 920191 on a VTB, 02-136927 on a VTBP, or the F3 equivalent.
Confirm the two 229662 locating pins are seated before the cover goes on.
Fit the coupling kit and the correct number of retaining rings for your type.
On a BP build, fit both the adapter kit and the spacer kit. One without the other will not assemble correctly.
Prefill the housing with clean oil, then torque the four 38523 bolts to 88.1-101.7 N.m (65-75 lb.ft) and the four 298147 adapter bolts to 55.2-67.8 N.m (40-50 lb.ft), both evenly in a crossing pattern.

Step 7: Test and Run In

Turn the shaft by hand with the rear pump fitted; it should rotate smoothly with no tight spots or notchiness through the coupling. Start the machine unloaded at low speed, bleed both circuits, and confirm each pump primes. Run unloaded for several minutes before applying pressure, and load each circuit separately.

Common 25VT Faults and the Parts That Fix Them

Rear pump fails repeatedly: worn coupling splines. Replace the coupling kit and check the adapter plate register for fretting.
Knocking or rattle at the back of the pump: coupling wear or a missing retaining ring. A VTBP takes two.
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, or a grooved shaft if the leak returns quickly.
Leak between the adapter and housing: O-rings 351776, 154086 or 154088, all supplied in the seal kit.
BP build will not go back together: spacer kit 02-136817 missing. BP models need both the adapter kit and the spacer kit.

Vickers 25VT Specifications

Type: Fixed displacement balanced vane pump with thru-drive
Variants: 25VTA, 25VTB, 25VTBP
Vanes: 12 vanes and inserts per cartridge
Rotor: 584618. Vane kit: 02-136719. Inlet plate: 591016
Cover bolt torque: 88.1-101.7 N.m (65-75 lb.ft), 4 off part 38523
Adapter plate bolt torque: 55.2-67.8 N.m (40-50 lb.ft), 4 off part 298147
Service reference: I-3154-S
Compatible brands: Vickers, Eaton Vickers, Danfoss legacy
Applications: Machine tools, presses and any circuit needing two pumps from one drive

Shop OEM or Aftermarket Equivalent 25VT Replacement Parts

Frequently Asked Questions

How do you rebuild a Vickers 25VT thru-drive vane pump?

Identify whether you have a VTA, VTB or VTBP first, then drain and clean the pump, remove the rear pump and the four 298147 adapter plate bolts, recover the coupling and its retaining rings, undo the four 38523 bolts and withdraw the cartridge kit. Fit a complete new cartridge, the coupling kit for your type and the seal kit for your model, then torque the 38523 bolts to 88.1-101.7 N.m and the 298147 adapter bolts to 55.2-67.8 N.m and run each circuit in separately.

What is the bolt torque on a Vickers 25VT?

Two figures. The four 38523 cover bolts torque to 88.1 to 101.7 N.m, which is 65 to 75 lb.ft. The four 298147 adapter plate bolts torque to 55.2 to 67.8 N.m, which is 40 to 50 lb.ft. Both are tightened evenly in a crossing pattern.

What seal kit fits a Vickers 25VT?

It depends on the thru-drive type. A 25VTA takes 920189, a 25VTB takes 920191 and a 25VTBP takes 02-136927. The F3 equivalents are 920190, 920192 and 02-136928 respectively.

What extra parts does a 25VT BP model need?

A BP model needs both an adapter kit and a spacer kit. That is adapter kit 941297 plus spacer kit 02-136817, and the build also uses two 89447 retaining rings rather than one, along with spacer 588725, washer 427700, O-ring 375422 and two 205436 screws.

Why does the pump on the back of my 25VT keep failing?

Almost always a worn coupling. The coupling splines take the full torque of the rear pump, and once they are rounded they destroy the splines on whatever is fitted behind. Replace the coupling kit for your type and check the adapter plate register bore for fretting at the same time.

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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.