Hydrostar® Motors
Catalogs and Service Manuals  

Hydrostar

Hydrostar_Cutaway

 

Product Details

The Hydrostar® Motor is a Radial Piston design that provides a Low Speed High Torque (LSHT) output. This very durable workhorse is used in a wide variety of applications from Fishing to Forestry, Mining to Marine, Recycling to Shredders, as well as Conveyors and Railroad Equipment.

No matter what your application or use, if you need a dependable and durable LSHT motor... always think Hydrostar®.

Features

  • Speed is infinitely variable and the torque is constant over the entire speed range.
  • Excellent efficiency allows precise positioning of driven equipment.
  • Rapid acceleration, deceleration and reversing.
  • Large main bearings assure long life and allow heavy side load capacity.
  • 25 standard models offering up to 20,000 lb. torque.
  • Many multiple displacement models.
  • SAE ports including 4 bolt flanges and straight threads.
  • SAE splines and tapered keyed shafts are standard.
  • Several drain port locations to ease mounting.
  • Seals made of VitonÆ.
  • Availability from regional stocking locations.
  • Distributors throughout the world.

   
Specifications for Single Displacement
Model
Displacement (in3/rev)
Output Torque at 1000 psi (ft-lbs)
Max. Cont. Output Torque (ft-lbs)
Man. Cont. Pressure (psi)
Speed Range (rpm)
Man. Cont. Output Power (hp)
Weight (lbs)
MRH-12
12.7
140
535
3570
3-600
42
81
MRH-30
30.4
350
1300
3570
3-500
85
169
MRH-45
45.5
550
2040
3570
3-400
120
275
MRH-60
61.3
700
2560
3570
3-380
155
363
MRH-80
82.8
950
3560
3570
3-300
175
363
MRH-95
93.4
1100
4130
3570
3-300
190
363
MRH-135
133.9
1600
5940
3570
3-220
200
496
MRH-190
191.6
2300
8675
3570
3-175
230
617
MRH-270
268.4
3150
11648
3570
3-125
225
820
MRH-375
377.5
4290
16300
3570
3-120
300
1150
MR-525
523.9
6250
19520
3000
3-80
220
1698
MRHD-540
536.7
6400
19800
3000
3-100
280
1480

 

Specifications for Multiple Displacements
Model
Displacement (in3/rev)
Max. Set Press. (psi)
Inter. Peak Press. (psi)
Output Torque (ft-lbs)
Max. Speed (rpm)
Max. Free Wheeling Speed (rpm)
Man. Output Power (hp)
Weight (lbs)
@ 3000 psi
@ 3570 psi
@ 3000 psi
@ 3570 psi
MRH2-45-1
44.5/22.8
3570
4000
1630/745
1930/880
400/600
200/300
-
120
291
MRH2-45-2
44.5/0
3570
4000
1630/0
1930/0
400/-
200/-
2000
120
291
MRH2-95-1
93.4/46.7
3570
4000
3400/1590
4050/1850
300/450
150/225
-
190
418
MRH2-95-2
93.4/0
3570
4000
3400/0
4050/0
300/-
150/-
2000
190
418
MRH2-135-1
133.9/66.9
3570
4000
4880/2275
5820/2710
220/330
110/165
-
200
551
MRH2-135-2
133.9/0
3570
4000
4880/0
5820/0
220/-
110/-
2000
200
551
MRH2-190-1
191.6/95.8
3570
4000
7050/3360
8460/4050
175/260
100/130
-
230
695
MRH2-190-2
191.6/0
3570
4000
7050/0
8460/0
175/-
100/-
2000
230
695
MRH2-270-1
268.4/134.2
3570
4000
9775/4570
11640/5440
125/240
75/120
-
225
899
MRH2-270-2
268.4/0
3570
4000
9775/0
11640/0
125/-
75/-
2000
225
899
MRH2-375-1
377.5/188.7
3570
4000
13680/6310
16300/7450
120/180
60/90
-
300
1200
MRH2-375-2
377.5/0
3570
4000
13680/0
16300/0
120/-
60/-
1000
300
1200