JETStream 3000 series, Operation Manual, Page: 23 / 84

Bareshaft Pump
15
Raising System Pressure
WARNING
!
Before building pressure, contain the high
pressure discharge hose. Failure to contain and
control the high pressure water can result in
death or serious injury. The water is considered
“contained” if it is allowed to discharge from the
system through a “manned” control gun or a
“manned” lance inserted in a tube. Control guns
can produce a tremendous amount of reverse
thrust based on flow and pressure.
Discharge must be in an enclosed space
where no one can get injected and the end of
the hose is restrained from moving.
Never use open lengths of high pressure hose
for anything but purging at low pump speed.
Install whip checks at all hose connections.
!
CAUTION
When operating in cold temperatures, allow
ample time for the pump oil to warm before
raising system pressure.
ATTENTION
If new packing was installed or if operating the
pump for the first time, the pump packing must
be broken in properly. Refer to “Breaking In
New Packing” for instructions.
ATTENTION
Always blast with the bypass valve fully
closed. This will ensure the most efficient oper -
ation with all water being utilized. If less water
volume is required, reduce the engine rpm to
control the flow amount. If bypassing flow is
necessary, the bypass valve cartridge and the
bypass valve diffuser will wear and these parts
may need replacing regularly. Bypassing water
also wastes water and wastes fuel as this is
lost horsepower.
WARNING
!
Do not operate the pump under a load at en-
gine speeds below 1400 rpm. This will lug the
engine and cause excessive vibration leading
to engine damage and cracked brackets,
guards and fittings.