Hale SMR - Manual (Page 23)

Stainless Max Series Pumps 2-9
Introduction
Hale offers a variety of pump gear ratios to accommodate a wide
range of apparatus manufacturer requirements based on engine
speed and available horsepower. The gearbox can withstand the
full torque of the engine in ROAD operating conditions up to
16,000 pound-feet (21,693N-m).
The gearbox consists of the outer housing, gear set, and input and
shafts that are both made of heat-treated nickel steel to support
the shaft loads. (See Figure 2-9: “Overview X-Series Gearbox,”
on preceding page 2-8.)
Special care must be taken to properly set the clearances on
these bearings. Also see Section 6: "Maintenance and Repair,"
beginning on page 6-1.
Mid-Ship Pumps
Midship pumps are so named because of their location on the fire
apparatus. They are normally driven through an integral transmis-
sion that has a sliding gear shaft and sliding gear that selectively
directs the engine power to the pump or the rear axle. Figure 2-
10: “SMM Split-Shaft Drive Applications” shows the typical
midship pump split-shaft arrangement on a chassis.
Figure 2-10: Typical Split-Shaft Drive Applications
Hale “X” Gearbox Ratios: 1:1.96, 2.13, 2.32, 2.55, 2.83
Transmission
Drive Shaft,
Split-Shaft
Pump and
Gearbox
Drive Axle
Drive Shaft
Drive Shaft
Rear Mount Split-Line Drive PTO
Rear Mount PTO Drive