Aftermarket Replacement M4 Vane Motors
Fixed-displacement M4 vane motors — M4C / M4D / M4E frames, bi-directional (rotation code N), for fan, cooling and mobile drives. Maximum pressure is 175-230 bar depending on the displacement code (HF-0 / HF-2), and the low-load (80 bar) speed limit is 4000 r/min (3600 on M4E). M4C1 / M4D1 are the internal-drain versions (drain port plugged, port form 02 only). All units are new aftermarket replacements, quality checked before shipping; send us the complete nameplate code and we confirm the fit before ordering.
Technical data — M4 Vane Motors
| Frame | M4C / M4C1 | M4D / M4D1 | M4E |
|---|---|---|---|
| Displacement range (cm³/rev) | 24.4 - 80.1 (7 codes: 024-075) | 91.1 - 144.4 (7 codes: 062-138) | 158.5 / 191.6 / 222.0 (153 / 185 / 214) |
| Mounting flange | SAE B J744c | SAE C J744c | SAE C J744c |
| Max pressure (intermittent, HF-0/HF-2) | 230 to 175 (by displacement code) | 230 / 210 / 190 / 175 (by code) | 190 / 180 / 175 |
| Speed (low load / full pressure) | 4000 / 2500·3000 | 4000 / 2500·3000 | 3600 / 2500·3000 |
| Shaft codes | 1 key (SAE B) · 2 key (non-SAE) · 3 spline (SAE B) | 1 key (SAE C) · 3 spline (SAE C) | 1 key (SAE C) · 3 spline (SAE C) |
| Port form (item 8) | 01 SAE thread · 02 4-bolt SAE flange (UNC) · M4 metric flange + BSPP drain | 01 (M4D only) · 02 | 02 |
| Typical values (2000 r/min @ Δp 175 bar) | 60.5 - 198 N·m / 12.7 - 41.5 kW | 236 - 372 N·m / 49.4 - 77.9 kW | 398 / 484 / 567 N·m · 83.4 / 101.4 / 118.8 kW |
| Mass | 15.4 kg | 27.0 kg | 45.0 kg |
Selection notes
M4 is a 9-item code: series (drain arrangement) - displacement - shaft - rotation N - porting 00 - design letter - seal class (1 / 5) - port form - modification. M4C1 / M4D1 take port form 02 only and have the drain port plugged. M4E is listed with seal class 5 only. Externally drained versions (M4C / M4D / M4E): whichever port is at low pressure must not exceed 35 bar, and the drain line must keep back pressure below 3.5 bar (50 PSI). Internally drained versions (M4C1 / M4D1): the low-pressure port must not exceed 3.5 bar (peak 7 bar).
Ordering
The model code must be complete — ring size, mounting, inlet and outlet, shaft and rotation together define the pump. Send the full nameplate code and we will confirm the replacement.
Need the ring size, shaft or port confirmed? Send us the full model code from the nameplate and we will confirm before you order. Contact us
Aftermarket M4 vane motors – M4C / M4D / M4E frames, 24.4-222 cm3/rev, up to 230 bar, bi-directional; SAE or ISO flange, keyed or splined shaft. Nameplate code confirmed before shipping.
M4 Vane Motors
Aftermarket M4 vane motors – M4C / M4D / M4E frames, 24.4-222 cm3/rev, up to 230 bar, bi-directional; SAE or ISO flange, keyed or splined shaft. Nameplate code confirmed before shipping.
