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• Insufficient lubrication of PTO shaft or
binding of PTO shaft which can cause a
side thrust to the internal components
of the pump and overheat the pump
and diaphragms. A change of oil colour
indicates a pump problem. The oil should
be regularly monitored when spraying so
that any problem is detected as soon as
possible. If the oil goes milky in colour, it
is likely the diaphragm has been damaged
and the spray mixture has come into
contact with the oil. If the oil goes black
(or dark grey), it is likely the pump has
overheated, possibly due to the PTO shaft
binding through insufficient lubrication.
To replace a side diaphragm:
When side diaphragms require replacement it
is normal practice to replace the air damper
diaphragm as well.
1. Flush pump with clean water to remove
chemical residue, then flush with
appropriate decontaminating agent (refer
to chemical label for decontamination
instructions).
2. Run pump dry for 15-20 seconds to
remove water.
3. Remove all air from air damper chamber by
pushing in air valve.
4. Remove pump from sprayer.
5. Remove pump manifolds and pump heads.
6. Drain oil from pump.
NOTE:
Carefully note the position and
orientation of all heads, manifolds and
valves when disassembling pump. Failure to
reassemble correctly will result in severe pump
damage.
7. Remove diaphragms.
8. Remove cylinder sleeves.
9. Flush inside of pump with diesel.
10. Visually inspect inner workings of pump.
11. Reassemble with new diaphragms (must
be correct diaphragms) once satisfied with
condition of pump.
12. Refill with oil. Rotate pump manually (by
hand) to remove air locks. Do not overfill.
