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MAINTENANCE AND SERVICE
MAINTENANCE, ROUTINE SERVICING, AND
INSPECTION
PREVENTATIVE MAINTENANCE CHECKLIST
CHECK
DAILY
Clean Filters
X
Water Leaks
X
Plumbing
Chamber Fluid
Each system's maintenance cycle will be exclusive. If system
performance decreases, check immediately.
Duty cycle, temperature, quality, type of fluid being pumped,
and inlet feed conditions all affect the life and service interval of
the pump.
Before attempting to service your pump, be sure that it is
disconnected from all energy sources.
PUMP STACK REPLACEMENT - STANDARD THREADED
DISCHARGE
1.
Remove pump from service and secure to a stable
work bench.
2.
Using a 1-1/4" hex head bit, turn the discharge CLOCKWISE (left
hand threads) to remove. A rubber strap wrench may be used to
help keep the pump housing shell from rotating while removing
the discharge.
3.
Remove the pump stack assembly by using a pliers or similar
tool to pull the stack out of the shell. Be sure to hold the
pump shaft on the exposed hex area to avoid damaging the area
of the shaft that rotates in the discharge bearing. A back and
forth motion may be needed to loosen the stack from
the shell. Be careful not to damage the edges of the shell.
4.
Inspect the O-ring located on the discharge and replace
if damaged.
5.
Assemble the pump by completing steps 1-3 in reverse order.
6.
Torque the discharge to 80-100 ft-lbs.
7.
Make sure all components, especially the bottom suction plate,
is installed.
PUMP STACK REPLACEMENT - BOLTED DISCHARGE, SELF
PRIMING MODELS
1.
Remove pump from service and secure to a stable work bench.
2.
Using a 13mm socket, remove the 4 tie rod bolts.
3.
Remove the pump stack assembly by using a pliers or similar
tool to pull the stack out of the shell. Be sure to hold the pump
shaft on the exposed hex area to avoid damaging the area of
the shaft that rotates in the discharge bearing. A back and forth
motion may be needed to loosen the stack from the shell. Be
careful not to damage the edges of the shell.
16
ANNUALLY (<1000
WEEKLY
MACHINE HRS)
X
X
4.
Inspect the O-ring located on the discharge and replace if
damaged.
5.
To re-assemble the pump, it is best to have the pump laying on
its hydraulic motor with the motor shaft oriented upward.
6.
Remove the inner stack components from the shell and
install into position on the pump inlet flange. Make sure all
components of the stack are in place, especially the bottom
suction plate. Make sure the pump shaft is engaged with the
coupling on the motor shaft.
7.
Remove the top priming stage diffuser. Install it onto
the pump discharge flange by aligning the 4 ribs with the
corresponding notches on the discharge flange fitting. It
should stick to the discharge flange - if not apply some light
grease to hold it in place during installation.
8.
Carefully align the bottom priming stage diffuser so that the
half moon rib is at the 12:00 and 6:00 position to the top of the
pump as it will be mounted on the sprayer.
9.
Install the metal shell over the pump stack.
10. Carefully align the pump discharge flange and top priming
stage diffuser with the arrow oriented upward as the pump
would be mounted on the sprayer. Install this into the shell
and onto the pump stack. It should pop into position with
a small gap (about 1/8-3/16" between the discharge flange
and the top of the shell. If not, it may have been slightly
misaligned - if this happens, remove both parts and repeat
step 10.
11. Apply medium strength thread locker to the 4 tie rod bolts and
snug the bolts until the heads just start to touch the top of the
discharge flange in the correct orientation for how the pump
will be mounted to the sprayer.
Tighten evenly, a small amount at a time in a star pattern, and
gradually bring the torque up to 66 in-lbs. Uneven torque may
cause the pump to bind.
12. Check to make sure there is an even gap between the shell
and the discharge flange after it is fully torqued down.
ASSEMBLY TIPS
Ensure the new pump stack is fully inserted into the drive
transmission shaft.
Apply a thin coating of grease or soapy water solution to the
discharge O-ring to ease installation into the shell.
A thin coat of anti-seize may be applied to the threads of
both the shell and discharge to make assembly and future
disassembly easier.
For self-priming pumps, it helps to turn the pump shaft so
that an impeller blade lines up with the half moon of the
priming stage, making alignment easier.
L-1578 (08-15-2023)
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