104
(1) Spool operation (take the tilt
spool valve for example)
a) Neutral position (See Fig. 5-4)
The high-pressure oil from lift pump
returns to the oil tank through the
mid-passage.
Fig. 5-4 Neutral position
b) Pushing-in of spool (See Fig. 5-5)
In this time, the spool is pushed in to
close the mid-passage. This causes the oil
from the main oil-inlet to push up the inlet
check valve and to flow into the port “B”.
The return oil from the port “A” flows
through the low-pressure passage to the
tank and the spool is restored to its neutral
position by the return spring.
Fig. 5-5 Push in spool
c) Drawing-out of spool (See Fig. 5-6)
With the mid-passage closed, the oil
from the main oil-inlet pushes up the
check valve and flows into the port “A”.
The return oil from the port “B” flows
through the low-pressure passage to the
tank. The spool can be restored to its
neutral position by return spring.
Fig. 5-6 Draw out spool
(2) Motion of safety relief valve
Summary of Contents for CPD10
Page 1: ......
Page 8: ...5 ...
Page 9: ...6 Ⅱ Main Specifications of Forklift Truck Enternal view of forklift trucks ...
Page 20: ...17 Fig 1 4 Gearbox axle assembly 1 1 8t 2t 2 5t Figure 1 5 reducer and differential 3 3 5t ...
Page 46: ...43 Fig 4 1 Circuit diagrams of electric system CPD10 18 GC1Li ...
Page 47: ...44 Fig 4 2 Circuit diagrams of electric system CPD10 18 GD1Li ...
Page 48: ...45 Figure 4 3 Circuit diagrams of electric system CPD10 18 GD3Li ...
Page 49: ...46 Fig 4 4 Circuit diagrams of electric system CPD20 25 GC1Li ...
Page 50: ...47 Fig 4 5 Circuit diagrams of electric system CPD20 25 GD1Li ...
Page 51: ...48 Figure 4 6 Circuit diagrams of electric system CPD20 25 GD3Li ...
Page 52: ...49 Fig 4 7 Circuit diagrams of electric system CPD30 35 GC1Li ...
Page 53: ...50 Fig 4 8 Circuit diagrams of electric system CPD30 35 GD1Li ...
Page 54: ...51 Figure 4 9 Circuit diagrams of electric system CPD30 35 GD3Li ...
Page 55: ...52 Figure 4 10 Circuit diagrams of electric system CPD30 35 GB7Li ...
Page 56: ...53 Figure 4 11 Circuit diagrams of electric system CPD30 35 GB3Li ...
Page 68: ...65 4 3 2 CURTIS control device Fig 4 21 The controller of CPD10 18 GC1Li ...
Page 69: ...66 Fig 4 22 The controller of CPD10 18 GD1Li ...
Page 70: ...67 Fig 4 23 The controller of CPD10 18 G31Li ...
Page 71: ...68 Fig 4 24 The controller of CPD20 25 GC1Li ...
Page 72: ...69 Fig 4 25 The controller of CPD20 25 GD1Li ...
Page 73: ...70 Fig 4 26 The controller of CPD20 25 GD3Li ...
Page 74: ...71 Fig 4 27 The controller of CPD30 35 GC1Li ...
Page 75: ...72 Fig 4 28 The controller of CPD30 35 GD1Li ...
Page 76: ...73 Fig 4 29 The controller of CPD30 35 GD3Li ...
Page 77: ...74 Fig 4 30 The controller of CPD30 35 GB7Li ...
Page 78: ...75 Fig 4 31 The controller of CPD30 35 GB3Li ...
Page 131: ......