Yale A7S1 User Manual

Hydraulic System
NOTE: If the forklift truck is kept without operating for
a long time, it is required to lift the mast cylinder 2-3
times at least every 10 days for lubrication
maintenance.
Forklift Truck Tonnage
GLP/
GDP20UX
GLP/
GDP25UX
GLP/
GDP30UX
GLP/
GDP35UX
Equipped Engine PSI 4G64 2.4L
Main Pump
Type Gear Type Gear Type Gear Type Gear Type
Driving Engine driven
Full load flow
72 liter/min
(19 gal/min)
72 liter/min
(19 gal/min)
72 liter/min
(19 gal/min)
82 liter/min
(21.7 gal/min)
No load flow
78 liter/min
(20.6 gal/min)
78 liter/min
(20.6 gal/min)
78 liter/min
(20.6 gal/min)
88 liter/min
(23.2 gal/min)
Multi-way
Valve
Model MFT04 MFT04 MFT04 MFT04
Type
Double Spool Valve, with Overflow Valve, Bypass Valve, and
Inclined Auto-locking Valve, pilot valve load feedback
Adjusting Pressure
18 MPa
(2610.68 psi)
18 MPa
(2610.68 psi)
18 MPa
(2610.68 psi)
18 MPa
(2610.68 psi)
Bypass Valve
Pressure
11 MPa
(1595.42 psi)
11 MPa
(1595.42 psi)
11 MPa
(1595.42 psi)
11 MPa
(1595.42 psi)
Flow Rate
12 liter/min
(3.2 gal/min)
12 liter/min
(3.2 gal/min)
12 liter/min
(3.2 gal/min)
12 liter/min
(3.2 gal/min)
Lift Cylinder
Type
Single Act Piston Type, with Shutoff Valve, one-way valve and
lower buffer
Cylinder Inner Diameter
Φ50 mm
(2.0 in.)
Φ50 mm
(2.0 in.)
Φ56 mm
(2.2 in.)
Φ63 mm
(2.5 in.)
Stroke
(2nd-grade Standard Mast at 3m Lifting Height) 1495mm
(Varying along with Type of Mast and Lifting Height)
Tilt Cylinder
Type
Double Acting
Cylinder
Double Acting
Cylinder
Double Acting
Cylinder
Double Acting
Cylinder
Cylinder Inner Diameter
Φ70 mm
(2.8 in.)
Φ70 mm
(2.8 in.)
Φ80 mm
(3.1 in.)
Φ80 mm
(3.1 in.)
Piston Rod Outer Diameter
Φ32 mm
(1.3 in.)
Φ32 mm
(1.3 in.)
Φ35 mm
(1.4 in.)
Φ35 mm
(1.4 in.)
Stroke
122 mm
(4.8 in.)
122 mm
(4.8 in.)
141 mm
(5.6 in.)
141 mm
(5.6 in.)
OVERVIEW
The hydraulic system is composed of a steering
control unit, a multi-way valve, lift cylinders, tilt
cylinders, and Hydraulic hoses and or Hydraulic
Tubes, The power-take-off (PTO) of the engine drives
the steering control unit directly.
Because the pump housing and pump cover are made
from aluminum, they are light and sturdy. The active
gear and the passive gear each have two shafts that
are individually installed on the pump housing
bearings. These bearings are made of special
material, to bear the radial load of the gear and also
serve as the baffle seats for the gear ends.
8000 YRM 2199 Hydraulic System
41

Yale A7S1 Specifications

General

Brand	Yale
Model	A7S1
Category	Forklifts
Language	English