Hale 4DK Series - Manual (Page 13)

Manual p/n: 029-0020-79-0 13
4DK Series Pumps
To increase the pressure when this occurs,
reduce the pump flow.
As the throttle is opened, the pressure
gauge reading increases with engine
speed. If the engine speed increases
without an increase in pressure, the pump
may be cavitating. In this case, close the
throttle slowly until the pressure begins to
stabilize and track with engine speed. If
this does not correct the problem you may
be trying to pump more capacity than is
available from the supply. Also check the
inlet strainers for possible debris restricting
the flow.
14. Open the discharge valve(s).
15. After completion of pumping, gradually
reduce the pump pressure until the engine
is at an idle speed.
16. Verify that the operator’s hand throttle or
governor control has returned to idle
position.
17. Shift the truck transmission into the
NEUTRAL position, and wait about four
seconds. Check to make sure the speed-
ometer reads “0.”
18. Move pump shift control valve lever to the
ROAD position. The in-cab and panel
pump indicator lights should go out when
the pump transmission starts to shift into
the ROAD position.
Emergency Pump Shift Procedures
Before implementing manual override shift
procedures, repeat recommended procedures
as described in the previous section. If the
shift fails to take place, follow these proce-
dures.
1. Bring the truck to a complete stop.
2. Apply the truck parking brake and chock
the wheels.
3. Shift the truck transmission to the
NEUTRAL position.
4. For PUMP or ROAD position, put the in-
cab shift control in the NEUTRAL position.
(Neutral position is exactly in the middle,
between the road and pump positions.)
5. Shut down the engine.
WARNING !
DO NOT ATTEMPT EMERGENCY SHIFT
PROCEDURES WHILE THE ENGINE IS RUNNING.
6. Employ the manual override procedure at
the shift cylinder on the pump gearbox as
follows:
Note: The shift stroke is approximately 1”
(25 mm). Make sure the gearbox is fully
shifted and shift indicators show proper mode.
7. An eyebolt is provided in the shift shaft to
accept a drift punch or screwdriver. By
inserting this tool into the hole provided,
you are able to pull or push the shaft
manually.
8. Pull the shift shaft OUT for PUMP position
(after in-cab control valve selection), or
push shift shaft IN for ROAD position (after
in-cab control valve selection).
If the shift stroke cannot be completed
manually, turn the drive shaft slightly by
hand to realign the internal gears and
repeat the manual shift effort.
9. Some units may be equipped with a
manual shift device attached to the eye
bolt. Refer to the manufacturer’s instruc-
tions when manual shift devices are
installed.