Diamond Products CB21H-XL - Manual (Page 26)

DESCRIPTION AND SPECIFICATIONS
Pump: Gear, pump rotation is clockwise (motor is CCW).
Maximum GPM: 14.1 GPM (53.2L/M) at no load. Flow will decrease as pressure increases.
Hydraulic Fluid Tank Capacity: 11 gallons (41.6Liters)
Hose Couplings: Bruning quick disconnect, 3/4 inch & ½ inch
Relief Pressure: Factory set at 2600 PSI /179.3 Bar (at valve outlet port). Adjustable
to750 PSI, A higher relief setting will stall the engine.
Engine: Honda 21.4 HP (16.0 KW) Net @ 3600RPM, Air-cooled, No load RPM set to 3850.
Fuel tank: 4.4 Gal (16.6L).
This unit is compatible with most hydraulically driven sawing and drilling components. The
system may not be compatible with components of some manufacturers.
The power unit was inspected and operated before shipment and should not require any
additional adjustments prior to its initial use.
Hydraulic Fluid: The reservoir of the
hydraulic power unit must be full prior to
start-up. The use of high quality petroleum
based hydraulic oil with the following
properties is recommended:
 Anti-wear
 Low
foaming
 Rust and oxidation inhibitors
 Wide temperature range
 Fluid viscosity: 8-1000 Centistokes
(52-4600 SUS). The unit is shipped
with an ISO 46 Viscosity grade
(8Cs/52SUS @ 212F/100C and
46Cs/210SUS @ 104F/40C).
The oil must be kept free of contamination
to avoid damage to system components.
The strainer in the fill cap must always be
in place when adding oil. Quick
disconnects must be cleaned before
connections are made.
Control Valve: The pressure
compensated flow control valve on this unit
allows full flow control while the gas engine
remains at its most efficient wide-open
throttle. This allows a higher operating
pressure at all flows. Flow settings are:
0-2, all flow routed to tank; 2-8, adjustable
range, 8-10 full flow.
Relief pressure can be adjusted by
removing the cap at the top of the main
control and using an Allen wrench to adjust
the relief cartridge. The relief can be set
as low as 750 psi; do not exceed 2600 psi.
To adjust, the flow control must be set at
10 and no tool should be attached. This
will force all flow over relief. Securely
replace the cap as oil seepage will occur
through the relief cartridge. The relief is
factory set at 2600 psi and should rarely
need adjustment.
Hydraulic Oil Cooler and Radiator: The
power unit is equipped with a brazed plate
style oil cooler. Water should be passed
through the cooler before being used for
dust control or blade & bit cooling. Some
tools will automatically shut off water flow
when not actively cutting, drilling, etc. This
may result in higher oil temperatures if the
power unit continues to run for long periods
without cooling water. The optional
radiator fan will come on automatically
when the oil temperature reaches ~120F.
(49C.) and continue to run until the
temperature switch cools, even if the
engine is shut off. The fan will stop
whenever the emergency stop switch is
used.
IMPORTANT: If there is a risk of frost
the water must be drained from the
cooler to prevent damage by freezing.