Model H-2000/H-3500 Proportioning Unit
40 159421A-1, Issue 2
4.
Using the ball seat removal tool, (5/8 hex stock) unthread and remove the ball seat.
•
Clean the gasket seating surfaces on the underside of the seat and inside the
pump base cavity.
•
Inspect the seat gasket and replace as required.
•
Inspect the ball seat for nicks or scratches. Replace as required.
•
Thoroughly clean the thread on the seat before replacement. It is also a
good practice to coat the threads with a liberal amount of lubricant.
•
Install the seat with gasket by threading the seat into the base by hand until
the gasket bottoms inside the pump base. Use a 6” adjustable wrench to
snug the seat approximately ¼ turn,
•
DO NOT OVERTIGHTEN. It may be necessary to periodically retighten
the seat throughout the life of the gasket.
5.
Wipe the valve ball clean and inspect for nicks. Replace as required and complete
the Pump Base Assembly.
Primary Heaters
WARNING:
T
HE HYDRAULIC COMPONENTS ARE PRESSURIZED UP TO
2000/3500
PSI
.
B
EFORE OPENING ANY HYDRAULIC CONNECTIONS OR SERVICING HYDRAULIC COMPONENTS
,
USE EXTREME CAUTUION TO INSURE THAT ALL PRESSURES HAVE BEEN BLED TO ZERO TO AVOID
SERIOUS BODILY INJURY
.
WARNING
T
HERE IS HIGH TEMPERTATURE INSIDE THE PRIMARY HEATER COVER BOX
.
B
EFORE PERFORMING MAINTENANCE
,
ALLOW HEATER TO COOL TO AVOID BODILY INJURY
FROM HOT FLUID OR HOT METAL
.
The sheath on the H-2000 and H-3500 heating rods are made from a special alloy
designed to be resistant to corrosion and erosion. However, eventually the service life of
the rod will be reached and if the sheath should fail, fluid under pressure will leak into the
heating element. This may result in leakage through the potting at the junction end of the
rod. Therefore, it is imperative that the unit
NEVER
be operated with the guard removed
and furthermore, you must never remove the guard for servicing without bleeding the
material pressure in the heater to zero and disconnecting all electrical power.
Replacing the heating element does not require disassembly of the heater. With the
power OFF, disconnect the lead wires, and using an open-end wrench, loosen the heating
element and remove it. Since fluid surrounds each element, be prepared to catch the
residual fluid as the element is withdrawn. Inspect the removed element, it should be
relatively smooth and shiny. If there is crusted burnt ash like material adhered to the rod
or the sheath shows pitting marks; replace the heating elements.
Reinstall the heating element using a thread sealant.
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