Features
Hydraulic Units for Travelling Machinery.
Variable axial piston pump of swashplate design for mobile concrete mixers, closed circuit transmission.
Flow is proportional to drive speed and displacement and is infinitely variable Adjust the angle of swashplate to realize the stepless variable Flow direction changes smoothly when the swashplate 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.
Auxiliary pump as the function of boosting pump & controlling oil pump
The maximum boost pressure is limited by a built-in boost pressure- relief valve
40MPa; Nominal pressure 40MPa
Long service life, high-precision bearings
|
Variable pump, swashplate design, mobile concrete mixers |
A4VT |
Operation mode
Size
|
--Displacement Vg max(ml/r) |
56 |
71 |
90 |
Control device[1-available 2- on request _ not available; ]
|
Hydraulic control / mechanical servo |
2 |
1 |
1 |
HW |
Proportional control,
Electric
with emergency actuation
and spring return |
12V |
2 |
1 |
1 |
EP1 |
|
24V |
2 |
1 |
1 |
EP2 |
Mechanical stroke limiter
|
Without Mechanical stroke limiter [no short code] |
|
|
With Mechanical stroke limiter |
M |
With ports X3, X4 for stroking chamber pressure
|
Without ports X3, X4[no short code] |
|
|
With ports X3, X4 |
T |
Series
Short code
Direction of rotation
|
Viewed from shaft end |
clockwise |
R |
|
counterclockwise |
L |
Seals
|
NBR (nitrile-caoutchouc), shaft seal in FKM (fluor-caoutchouc) |
N |
|
FPM (Fluorocarbon rubber to DIN ISO 1629) |
V |
Shaft end
|
Splined shaftSAE |
Without coupling flange |
S |
|
With coupling flange |
L |
Mounting flange 56 71 90
|
SAE 2 hole |
1 |
_ |
_ |
C |
|
SAE 4 hole |
_ |
1 |
1 |
D |
Working fluid port
|
A and B on same side [Metric, mounted by bolts. / connected by flange] |
10 |
Auxiliary pump & Through drive
|
Auxiliary pump |
Mounting flange |
hub |
|
|
1 |
_ |
_ |
F00 |
|
1 |
SAE A / 2 hole |
SAE A [N5/8" _ 9T 16/32DP] |
F01 |
|
1 |
SAE B / 2 hole |
SAE B [N7/8" _ 13T 16/32DP] |
F02 |
Valves
|
With high-pressure pilot relief valve, with by pass system |
_ |
1 |
1 |
1 |
|
With high-pressure relief valve, direct operated, with by pass system |
2 |
_ |
_ |
5 |
Filtration, boost circuit
|
Filtration in suction line of boost pump |
S |
Rotational speed sensor
|
withoutrotational speed sensor [no short code] |
|
|
With rotational speed sensor |
G |
Ningbo Minghe Lisheng Hydraulic Techonlogy Co., Ltd. is located in Ningbo, Zhejiang. We mainly supply all kinds of hydraulic parts, hydraulic pumps.
Customer's demands are our demands! Customer's satisfaction is our uccess! Our company will continue the tenet of high quality, reasonable price, the principle of honesty. We sincerely hope to create a better tomorrow with you!
