Hyster A238, Руководство пользователя

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A. TO TANK
B. FROM CYLINDER
1. SHOCK VALVE
2. ANTI-CAVITATION VALVE
3. SHOCK VALVE SPRING
4. ANTI-CAVITATION SPRING
5. SPINDLE
6. HAND WHEEL
Figure 7. Emergency Lowering Valve Assembly
Lift Chains
The lift chains are leaf type chains. A leaf chain
consists of link pins and plates that are made of
special steel. Heat treatment and mechanical
processing give the pins and plates their final
strength, but they also make these components
more vulnerable to fatigue fractures, if pin and
plate surfaces are damaged.
The link pins are riveted into the outer plates. The
press fit of the link pins in the outer plates is
essential for the integrity of the chain.
The inner plates have a tight sliding fit for an
optimized carrying area that also allows rotation
over the link pin.
The chains are connected to the carriage and outer
mast through chain anchors. The pin between chain
anchor and chain is secured with a snap ring. See
Figure 8 and Figure 9.
1. OUTER PLATES
2. LINK PIN (RIVETED TO OUTER PLATES
3. INTERMEDIATE PLATES
4. INNER PLATES
5. OUTER LINK
6. INNER LINK
Figure 8. Chain Components
A. CONTACT AREA
Figure 9. Contact Area Between Link Pin and Inner
Plates.
Description And Operation 4000 SRM 1664
6