Vickers 45VQ Vane Pump: Parts Catalog, Service Data & Rebuild Guide

The Vickers 45VQ is the high performance version of the 45V, the largest single frame in the V series industrial range, covering 42 to 60 USGPM. The VQ cartridge uses a flex-side plate and a 10 vane rotor, and the whole wearing assembly is replaced as one matched kit. The 45VQ carries by far the highest cover screw torque in the V series at 265 lb.ft, so a calibrated wrench with the range to reach it is not optional. RestoPower supplies OEM or aftermarket equivalent cartridge kits, vane kits, rings, rotors, shafts, bearings and seal kits for every 45VQ displacement code.

Exploded View and Parts Diagram

Vickers 45VQ vane pump exploded view diagram with cartridge kit table by capacity, seal kit numbers and screw torque 265 lb.ft

Vickers 45VQ cartridge and cover assembly with the full cartridge kit selection table. Every part number and torque figure quoted on this page is read directly off this drawing.

45VQ Cartridge Kits by Capacity

Everything left of the cartridge kit column is included in the cartridge kit. Order the kit, not the individual pieces.

Capacity (USGPM)	Ring	Cartridge Kit	F3 Cartridge Kit
45VQ42A	297510	416435	419511
45VQ47A	297718	421234	421954
45VQ50A	297502	416436	419510
45VQ57A	306772	421233	421955
45VQ60A	297503	416437	419509

Every 45VQ cartridge shares the same rotor, vane kit and plates; only the ring changes with capacity. Common cartridge parts: rotor 283871, vane kit 922701 (10 vanes and 10 inserts), inlet support plate 430807 (includes bushing), outlet support plate 415382, flex-side plate kit 923954, seal pack 433768 S/A (4 req'd), pin 422208 (2 req'd), screw 380109 (2 req'd).

Shaft Seal Kits

Build	Seal Kit	F3 Equivalent
Single shaft seal	920025	920027
Double shaft seal	920026	920028

Vickers 45VQ Torque and Assembly Specs

Item	Value
61321 Cover screw (4 req'd)	Oil the threads, then torque to 265 ± 10 lb.ft
380109 Cartridge screw (2 req'd)	105 ± 5 lb.in
Vane count	10 vanes and 10 inserts
Cover (inlet)	229633
Cartridge O-Ring	154107

Bronze faces must be installed toward the rotor. This applies to the flex-side plate and the support plates, and it is the single most commonly missed instruction on a VQ cartridge.
Shaft seal: wipe the outside diameter of the seal with oil before pressing it into the body, then apply grease to the seal inside diameter before installing the shaft.
Note the two very different torque figures. The cover screws are in lb.ft and the cartridge screws are in lb.in, roughly a thirtyfold difference. Reaching for the wrong wrench snaps the cartridge screws.

Reversing Cartridge Kit Rotation

The VQ cartridge can be converted between right and left hand rotation:

Remove the two cartridge screws.
Reverse the locations of the inlet support plate and the outlet support plate.
Reinstall the two screws hand tight only.
Use the pump cover to align all sections of the cartridge.
Remove the cover carefully, then tighten the two screws to 50 lb.in.

The reversal note printed on this drawing quotes the 25V frame plate numbers (430805 and 419079) as its example. On a 45VQ the equivalent plates are inlet support plate 430807 and outlet support plate 415382. The procedure is the same; use your own frame's part numbers.

Download the Service Data PDFs

How to Rebuild a Vickers 45VQ Vane Pump

A 45VQ rebuild is a cartridge job. The wearing parts, cam ring, rotor, vanes, flex-side plate and support plates, come as a matched cartridge kit, and the correct repair is to replace that kit rather than individual pieces. This is a heavy pump, so support it properly on the bench. Budget 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 Cover

Scribe the cover to housing relationship and the port positions before undoing anything, because a 45VQ can be reassembled rotated. The four 61321 cover screws are torqued to 265 lb.ft, so expect them to be tight; loosen them 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 430807, cam ring, rotor 283871 with its 10 vanes and inserts, flex-side plate and outlet support plate 415382. Note which face of the cam ring pointed toward the cover, because the ring is directional. The two 422208 pins locate the cartridge; check they have not stayed in the cover.

Step 4: Shaft, Bearing and Seal

Remove the retaining ring and 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. Check whether your pump is a single or double shaft seal build before ordering, because the kits differ: 920025 single, 920026 double.

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. Vane kit 922701 covers all 10.
Flex-side plate and support plates: scoring or bronze pickup on the running faces condemns them. Flex-side plate kit 923954 is the service part.
Housing bore: check for fretting where the cartridge locates. At 45VQ flows a fretted bore lets the cartridge move under load.

Step 6: Reassemble and Torque

Fit a complete new cartridge kit for your capacity code from the table above. Never mix a new cam ring with old vanes; they wear as a matched set.
Install the bronze faces toward the rotor, on both the flex-side plate and the support plates.
Fit all new seals from kit 920025 or 920026, including O-ring 154107, lubricated with clean hydraulic oil rather than grease.
Wipe the shaft seal outside diameter with oil before pressing it into the body, then grease the seal inside diameter before the shaft goes in.
Confirm the two 422208 locating pins are seated, and torque the two 380109 cartridge screws to 105 ± 5 lb.in.
Prefill the housing with clean oil, then oil the threads and torque the four 61321 cover screws to 265 ± 10 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 45VQ Faults and the Parts That Fix Them

Whining or chattering under load: worn cam ring and vanes, or a restricted inlet. At 45VQ flows the inlet is the usual culprit; check it first.
Oil weeping at the shaft: worn shaft seal, or a grooved shaft if the leak returns quickly.
Low flow at rated speed: worn cartridge kit.
Leak at the cover joint after rebuild: cover screws not brought to the full 265 lb.ft, or torqued dry instead of oiled.
Rapid cartridge failure after rebuild: a bronze face installed away from the rotor.
Repeat cartridge failure: almost always contamination or cavitation, not the parts.

Vickers 45VQ Specifications

Type: Fixed displacement balanced vane pump, high performance VQ cartridge
Capacities: 42, 47, 50, 57 and 60 USGPM
Vanes: 10 vanes and 10 inserts per cartridge
Cover screw torque: 265 ± 10 lb.ft, threads oiled, 4 off part 61321
Cartridge screw torque: 105 ± 5 lb.in, 2 off part 380109
Seal kits: 920025 single shaft seal, 920026 double shaft seal
Compatible brands: Vickers, Eaton Vickers, Danfoss legacy
Applications: Machine tools, industrial presses, injection molding, large power units

Shop OEM or Aftermarket Equivalent 45VQ Replacement Parts

Frequently Asked Questions

How do you rebuild a Vickers 45VQ vane pump?

Drain and clean the pump, scribe the cover orientation, remove the four 61321 cover screws and withdraw the cartridge kit, replace the shaft seal and bearing, then fit a complete new cartridge kit for your capacity code with all bronze faces toward the rotor, fit seal kit 920025 for a single shaft seal build or 920026 for a double, torque the two 380109 cartridge screws to 105 plus or minus 5 lb.in, then oil the threads and torque the four cover screws to 265 plus or minus 10 lb.ft before running the pump in unloaded.

What is the cover screw torque on a Vickers 45VQ?

265 plus or minus 10 lb.ft on the four 61321 cover screws, with the threads oiled first. This is the highest cover torque in the V series, so use a wrench that genuinely reaches it. The two 380109 cartridge screws are a completely different 105 plus or minus 5 lb.in.

What cartridge kit fits a Vickers 45VQ50A?

Cartridge kit 416436, or 419510 for an F3 build. It contains ring 297502, rotor 283871, vane kit 922701 with 10 vanes and inserts, both support plates and the flex-side plate. Only the ring changes across the 45VQ capacity range.

Which way round do the bronze faces go on a 45VQ cartridge?

Bronze faces must be installed toward the rotor, on both the flex-side plate and the support plates. Fitted the other way round the cartridge will fail quickly.

What seal kit fits a Vickers 45VQ?

Single shaft seal kit 920025, or 920026 for a double shaft seal build. The F3 equivalents are 920027 and 920028. Check which build you have before ordering, because the cartridge kits also come in standard and F3 versions.

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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.