Doosan DX60R Shop Manual page 653

Suction Operation
The anti-void unit is equipped with In the cylinder port "HP",
which supplies oil when cavitation occurs.
When pressure of the cylinder port "HP" is lower than "LP" in the
low pressure side, the sleeve (K) opens by difference in the
area between <A> and <B>.
Oil flows from than "LP" in the low pressure side to the cylinder
port "HP" and prevents cavitation.
Hint for Disassembly and Assembly of Overload Relief
Valve
Figure 10
1. Disassembly
For the original product, replace assembly.
When replacing,
subtense24) with a spanner, etc and take off the O-ring (2,
Figure 10).
If oil leaks from the adjuster part (3, Figure 10), loosen the
adjuster part and replace the O-ring (4, Figure 10).
In disassembling disassembly the adjuster kits, be
cautious so that Poppet may not be lost by which
parts are popped up by spring.
Main Control Valve
loosen the cap (1:
CAUTION
Figure 9
hexagonal
SP001639
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