Bosch Rexroth is the dominant hydraulic pump brand in the mobile crane industry globally. Liebherr LTM series, Grove GMK series, Tadano GR series, Sany SRC series — the majority of these machines use Rexroth A4VG or A4VSO series pumps driving the main lifting, luffing, and slewing circuits. The combination of 400 bar rated pressure, variable displacement efficiency, and proven reliability makes Rexroth the specification-of-choice for crane engineers who cannot tolerate failure.
Rexroth Pump by Crane Type
Mobile Crane
Liebherr LTM, Grove GMK, Tadano GR, Sany SRC, XCMG QY series
Crawler Crane
Liebherr LR series, Manitowoc, Kobelco CK series
Tower Crane
Potain, Liebherr EC series, Zoomlion, XCMG tower cranes
Rexroth Crane Pump Models Available
| Pump Model | Rated Pressure | Displacement | Typical Crane Capacity | Control Type |
|---|---|---|---|---|
| A4VG71 DA/HD | 400 bar | 71 cc/rev | Up to 50 tonne lifting | Electro-hydraulic |
| A4VG180 DA/HD | 400 bar | 180 cc/rev | 50-200 tonne lifting | Electro-hydraulic |
| A11VO95 | 350 bar | 95 cc/rev | Medium capacity cranes | Load sensing |
| A11VO130 | 350 bar | 130 cc/rev | Large crawler cranes | Load sensing |
| A4VSO250 | 400 bar | 250 cc/rev | Heavy crawler cranes | Variable / LS |
| A4VG56 | 400 bar | 56 cc/rev | Small / tower cranes | Standard variable |
How Our Crane Pump Refurbishment Differs from Standard
Extended Pressure Hold Test
For standard industrial pumps we hold rated pressure for 5 minutes. For crane-application Rexroth pumps, we extend this to 15 minutes — because a crane in a lifting position may hold rated pressure for extended periods. Any seal degradation or internal bypass will show in an extended hold test but may not appear in a short test.
Control Valve Response Testing
The A4VG DA (electro-hydraulic control) variant used in many cranes has a proportional control solenoid that must respond precisely to input commands. We test proportional response at multiple current inputs — confirming that load modulation (gentle lifting, controlled lowering) works correctly, not just that maximum pressure is achievable.
Why Crane Operators Choose PumpGrid
Documentation for Safety Compliance
Crane operations in India and the Gulf require documented equipment maintenance. Our written test report — with actual pressure readings and control valve test results — provides the evidence your site safety officer and crane inspection authority require.
Faster Than Manufacturer Lead Time
New Rexroth A4VG180 or A11VO130 pumps for cranes can have 6-12 week lead times from European distribution. Our refurbished stock dispatches in 2-3 days — the difference between a crane back in service this week versus next month.
Saudi Arabia & Gulf Export
Cranes are the backbone of Saudi Arabia's construction, port, and oil-sector projects. We regularly export Rexroth crane pumps to Riyadh, Jeddah, Dammam, and Al Khobar with full export documentation for Saudi customs clearance.
3-Month Warranty
All crane pumps carry a minimum 3-month warranty. If the pump fails due to a refurbishment defect within the warranty period — replacement is coordinated immediately. No crane sits idle waiting for a warranty claim to be processed.
Crane Hydraulic Pump Warning Signs — Act Before It Fails
Critical: A load not holding position in a crane circuit is a safety emergency. Do not operate the crane until the hydraulic system has been inspected by a qualified technician.