Hale 4DK Series - Manual (Page 11)

Manual p/n: 029-0020-79-0 11
4DK Series Pumps
The split shaft gearbox has a sliding collar that
selectively directs the engine power to the pump
or the apparatus drive axle.
The gearbox is capable of handling the required
engine horsepower, enabling the pump to meet
optimum performance levels as well as torque
requirements for over-the-road applications.
The gearbox consists of the housing, helical gear
set, and input and output shafts that are made of
heat-treated nickel steel.
This unit can withstand the full torque of the
engine in ROAD operating conditions up to
17,000 pound-feet (23.05 kN-m).
The 4DK series of pump gear boxes utilize
tapered roller bearings to support the shaft loads.
Special care must be taken to properly set the
clearances on these bearings.
SECTION 2 OPERATING PROCEDURES
OVERVIEW
This section provides information and procedures
for the operation of Hale 4DK series pumps.
OPERATING PROCEDURES
NOTICE !
THE PROCEDURES IN THIS SECTION ARE GEN-
ERAL OPERATING PROCEDURES. THEY DO NOT
REPLACE THE PROCEDURES AND POLICIES
ESTABLISHED BY YOUR COMPANY, NOR DO
THEY REPLACE THE RECOMMENDATIONS AND
PROCEDURES PROVIDED BY THE APPARATUS
MANUFACTURER'S MANUAL.
REFER TO COMPANY PROCEDURES ON SETTING
WHEEL CHOCKS AS WELL AS LAYOUT AND
CONNECTION OF HOSES.
NOTICE ! - continued
ALL VALVES, DRAIN COCKS, AND CAPS SHOULD
BE CLOSED.
General Operation
1. Position the truck for the best hookup
layout.
CAUTION !
NEVER ATTEMPT TO SHIFT THE PUMP
TRANSMISSION WHILE THE TRUCK TRANSMIS-
SION IS IN GEAR. ALWAYS SWITCH THE TRUCK
TRANSMISSION TO “N” AND VERIFY THE SPEED-
OMETER IS ZERO “0” BEFORE MAKING PUMP
TRANSMISSION SHIFT. (SEE FIGURE 4: "IN-CAB
PUMP SHIFT CONTROL," ON PAGE 12.)
Bearings must be replaced as matched sets with
shims. See Section 5 "Maintenance and Repair,"
beginning on page 21.
Shifting
The split-shaft gearbox is equipped with a
power shift system. An in-cab control valve is
provided for mode selection.
This control locks in place for pump operation.
An indicator switch is provided to alert the
operator when the gearbox has fully shifted
from ROAD to PUMP position.
Additionally, provisions are provided for
manual shift due to failure of the power shift
system. Different pump models utilize differ-
ent indicating switches. Some indicator
switches are pneumatic while others are
electric dependent on which pump model is
selected and/or your operation requirements.