Diamond Products CB20E-XL - Manual (Page 39)

HOSES: Large diameters and short
lengths are preferred and offer the highest
system efficiency. If one is operating 50 ft
(15.2M) from the power source, there is
also a 50 ft (15.2M) return for a 100 ft
(35.5M) total hose length. With 15 GPM
and oil at 100 deg. F (37.8C), this could
result in a 400 psi (27.5 Bar) pressure loss
with ½” hose and a 140 psi (9.6 Bar) loss
with 5/8” hose. Pressure loss will change
dramatically with oil temperature.
OPERATING INSTRUCTIONS
Operator Responsibilities
It is the operator’s responsibility to use this
unit and any attached tools under safe
working conditions and to follow proper
safety procedures for themselves, co-
workers, observers, and the public at large.
The operator must be aware of the
machine’s capabilities and limitations and
follow the safety precautions in each
section of this manual. Periodic
maintenance is required, in accordance
with the instructions herein, to promote
safe and reliable operations.
WARNING: Keep bystanders out of the
immediate work area.
Wear approved:
 Safety
glasses
 Ear
protection
 Hard
hat
 Gloves
 Safety shoes

Any other protective equipment
required for compliance with standard
safety practices or federal, state, and
local codes and regulations
Hose Connections: It is best to connect
the hoses to the unit before starting as
even very low residual pressure can make
hose installation more difficult. Push
couplings together until you hear it click.
Turn locking ring of coupling to the secured
position.
Starting Procedure:
 Be certain the unit is plugged into the
proper voltage.
 Set the flow control valve to zero.
 Be certain the stop button has been
pulled out.
 Press the start button on top of the
starter box.
Heating Cold Oil: Forcing the oil over
relief will quickly increase the oil
temperature. With no tool connected to the
unit, move the valve setting toward 10.
This will force an increasing percentage of
oil over relief. Heat cold oil to room
temperature or ~100F/38C maximum. Cold
oil greatly increases pressure loss in hoses
and fittings and may affect tool operation.
Maintaining Oil Temperature: With an
ample water supply and the radiator, it is
unlikely overheating will be an issue except
in the most extreme ambient temperatures.
To force high oil temperatures down, run
the unit with the flow control set to zero.
This unloads the unit yet circulates oil
through the cooling system. The rate of
cooling will depend on the ambient
temperature and how much water is being
passed through the cooler.
Some control valves at the external tool
may create backpressure and heat even
when off. It is best to set the flow control to
zero or shut the power unit down to avoid
heating and conserve energy.
IMPORTANT: Monitor the thermometer
at the top of the hydraulic tank.
Maximum recommended oil
temperature is 180 degrees Fahrenheit
(82 deg C).
Shutting Down:
 Shift the flow control valve to zero to
unload the system.
 Press the stop button on top of the
starter box.
39