GENERAL INTRODUCTION
1 - 3
CX EXCAVATORS
EXPLANATION OF CX SERIES
Reservoir
The reservoir is pressurized on all models. The air charge is provided by thermal expansion
and the differential area of the cylinders as they are stroked the first time. There is a
breather/pressure regulator/fill cap installed in the top cover of the units. A rubber-covered
button on top of the breather is provided to release the air pressure in the reservoir. A sight
gauge mounted to the side of the reservoir indicates the oil level. There is a 150-mesh
screen at the outlet of the reservoir to the hydraulic pump.
Reservoir
MODEL CX130 CX160 CX210 CX240
Capacity
Tank gal.
19 32 32 32
Capacity
System gal.
32 38 54 59
Filters
The oil returning from the main control valve flows through the oil cooler. There is a cooler
bypass valve in the circuit to protect the system during cold start conditions. As the oil returns
from the oil cooler, it passes through a full flow 10-micron filter. Some of the return oil is
routed through a 1-micron ultra-fine filter. Drain oil from the pilot control circuits and the case
drain oil from the swing and travel motors is returned through the main return filter.
A cartridge type filter is installed in the outlet of the pilot pump to protect all pilot valves from
contamination. All of these filters have filter bypass valves for cold start up protection.
Filters
MODEL CX130 CX160 CX210 CX240
Suction
150 mesh 150 mesh 150 mesh 150 mesh
Return
10 µ 10 µ 10 µ 10 µ
Ultra-fine
1 µ1 µ1 µ1 µ
Pilot
10 µ 10 µ 10 µ 10 µ
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