Diamond Products CB18BV-XL - Manual (Page 20)

DESCRIPTION AND SPECIFICATIONS
Pump: Gear, pump rotation is clockwise (motor is CCW).
Maximum GPM: 11.6 GPM (43.9L/M) at no load, 3900RPM. Flow will decrease as pressure
approaches the relief setting and as engine RPM drops under load.
Hydraulic Fluid Tank Capacity: 5-1/2 gallons (20.8Liters)
Hose Couplings: Bruning quick disconnect, ½ inch
Relief Pressure: Factory set at 2850 PSI /196.5 Bar (at valve outlet port). Adjustable
to750 PSI. At relief, all flow is to tank and none to tool.
Engine: Briggs & Stratton 18 HP (13.5KW) Net @ 3900 RPM , air-cooled, RPM set to 3900
Fuel tank: 1.9 Gal (7.1L).
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:
CCW, all flow routed to tank. Flow to tool
increases as valve rotates clockwise.
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 2850 psi
as the engine may stall. To adjust, the flow
control must be set at MAX 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 2850
psi and should rarely need adjustment.
Hydraulic Oil Cooler: The power unit is
equipped with an oil to air forced air style
oil cooler. The 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.
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 10 GPM
and oil at 100 deg. F (37.8C), this could
result in a 140 psi (9.6 Bar) pressure loss
with ½” hose and a 60 psi (4.1 Bar) loss
with 5/8” hose. Pressure loss will change
dramatically with oil temperature.
20