A4vtg Hydraulic Oil Pump for Combine Harvester

• Customization: Available
• After-sales Service: 24 Hours Online
• Warranty: 1 Year
• Model NO.: A4VTG
• Structure: Axial Piston Pump
• Cylinder Number: Single Cylinder
• Drive Mode: Hydraulic Driven Reciprocating Pump
• Pump Shaft Position: Horizontal
• Type: Axial
• Power: Hydraulic
• Straight Shaft Swashplate Piston Type: Pressureoil
• Radial Plunger Pump Type: Hydraulic Piston Pump
• Original: Yes
• Model: A4vtg
• Application: Construction Machinery
• Color: Customized
• Transport Package: Wooden Case for Export
• Specification: hydraulic
• Trademark: FOCOR
• Origin: China
• HS Code: 8413503190
• Production Capacity: 2000 Sets/Month
• Package Size: 40.00cm * 50.00cm * 60.00cm
• Package Gross Weight: 45.000kg

Product Description

Rexroth A4VTG Hydraulic Variable Piston Pump

Product Description

Concrete mixer hydraulic piston pump A4VTG71, A4VGT90

Description

Closed circuit
Series 32
Sizes 71, 90
Nominal pressure 5800 psi (400 bar)
Maximum pressure 6500 psi (450 bar)
Control device: (HW) Proportional control hydraulic, mechanical servo, hexagon shaft with lever to the rear.
(EP) Proportional control electric, with emergency actuation and spring return.
 
For the drum drive in mobile concrete mixers A4VTG071, A4VGT090 series.
-Variable axial piston pump of swash plate design for hydrostatic drives in closed circuit
-The flow is proportional to the drive speed and displacement.
-The flow increases as the angle of the swash plate is adjusted from zero to its maximum value.
-Flow direction changes smoothly when the swash plate is moved through the neutral position.
-Two pressure-relief valves are provided on the high pressure ports to protect the hydrostatic transmission (pump and motor) from overload.
-The high-pressure relief valves also function as boost valves.
-The integrated boost pump acts as a feed pump and control pressure supply.
-The maximum boost pressure is limited by a built-in boost pressure-relief valve.
-Tapered shaft option for direct drive shaft yoke installation.                              

 

Product Parameters

Technical Data 

Table of values (theoretical values, without efficiency and tolerances; values rounded)

Rexroth A4VTG				A4VTG71	A4VTG90
Displacement	Variable pump	Vg max	cm3	71	90
	auxiliary pump	Vg H	cm3	18,7	25,7
Speed	Max. speed at Vg max	Nmax continuous	rpm	3300	3050
	Limited max.	Nmax limited	rpm	3600	3300
	Intermittent max.	Nmax continuous	rpm	4100	3800
	minimum speed	Nmin	rpm	500	500
Flow	at Nmax Dauer and Vg max	Qmax	L/min	234	275
Power	at Nmax Dauer D p = 400 bar	Pmax	kW	156	183
Torque	at Vg max      D p = 400 bar	Tmax	Nm	451	572
(Variable pump without aux. pump)  D p = 100 bar		T	Nm	112,8	143
Moment of inertia (about drive axis)		J	kgm2	0,0072	0,0106

 

Dimensions

Application

Packaging & Shipping