Hale RSD - Manual (Page 19)

19 Section 2: Introduction
Hale Products, Inc., Nov. 2005, Rev-A
In tro d u ctio n
❑
Ball and Tapered Bearings
Bearings support and align the impeller and input shafts for smooth opera-
tion. They are the most common anti-friction bearings used and offer a
major contribution to the life of a fire pump. When replacing bearings, it is
important that you do not interchange bearing manufacturer’s components.
The bearing race and cone must always be replaced in matching sets, as
supplied by the manufacturer.
2.3 PUMP DRIVES
Hale pumps produce the volumes and pressures shown on their perfor-
mance curves. However, maximum pump performance is sometimes lim-
ited by the power capacity and speed limits of the engine, transmission, and
PTO. (See Figure 2-6: “Pump / Engine Rotation.”)
Three common pump drives
are used on fire fighting
apparatus:
❑ Split-shaft gearbox from
the apparatus drive shaft -
the most common pump
drive
❑ Operation from a Power
Take-Off (PTO) from the
truck transmission or drive
train
❑ A stand-alone drive with
separate engine (auxil-
iary engine)
Note: Also see Plate #843A “Vehicle Mounted Pump Applications” located at the
back of this manual. (See Section 8 “Drawing Package” on page 127.)
Hale pumps are available for either engine rotation (clockwise), or opposite
engine rotation (counterclockwise) PTO operation.
WARNING!
NEVER OPERATE A HALE PUMP ABOVE THE CONTINUOUS TORQUE RAT-
ING FOR ITS TRANSMISSION OR PTO, OR ABOVE THE RECOMMENDED PTO
OUTPUT SPEED AS RECOMMENDED BY THE PUMP / APPARATUS
MANUFACTURER.
Figure 2-6: Pump / Engine Rotation