Product overview
New aftermarket 4520VQ42A5 1AA20 — a 4520VQ double vane pump: two cartridge sections on one shaft, one inlet and two independent outlets, so two circuits can run at different pressures and flows. The model number is decoded item by item below.
Model code — 4520VQ42A5 1AA20
The model code fixes every mechanical interface of the pump. This unit reads as follows, using the position numbers of the model-code system:
| Position | Value | Meaning |
|---|---|---|
| 1 Seals | — | omitted — standard seals |
| 2 Series | 4520VQ | double pump: 45V shaft-end with 20V cover-end (first pair = shaft-end size, second pair = cover-end size) |
| 3 Pilot | — | omitted — standard pilot |
| 4 Shaft-end displacement | 42 | 42 = 138.7 cm³/r |
| 5 Port | A | SAE 4-bolt flange, inlet and both outlets |
| 6 Cover-end displacement | 5 | 5 = 18 cm³/r |
| 7 Mounting / shaft seal | — | omitted — flange mounting with single shaft seal |
| 8 Shaft | 1 | keyed shaft |
| 9 Port orientation | AA | viewed from the cover end — outlet 1 opposite the inlet; outlet 2 135° counter-clockwise from the inlet |
| 10 Design | 20 | design number of this series |
| 11 Rotation | — | right-hand (clockwise) |
Ordering
Send us the complete model number from your nameplate and we will confirm this pump matches before you order. Port flange kits are ordered separately.
Other models in this series
More VQ Double Vane Pumps models we stock (4520VQ frame first):
Series overview
Series page: VQ Double Vane Pumps. Parent range: V / VQ Double Vane Pumps · Family: V · VQ · 50V Series.
Cartridges and kits for this pump: V / VQ Cartridge Kits — the cartridge is interchangeable within the same position in the housing, so the original housing and shaft stay on the machine.
Not sure about the fit? Contact us with the full nameplate code and we will confirm before you order.
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