7-3
764333-098
7.4 CHEMICAL INJECTION PUMP
WARNING – CHEMICAL BURN/EYE INJURY
HAZARD: Detergents are caustic and can
cause adverse effects to exposed tissues. Do not
get in eyes, on skin or attempt to swallow. Read
and follow the precautions and instructions on the
detergent label and in the Material Safety Data
Sheet (MSDS) prior to handling the detergent, refill-
ing the detergent container or servicing the deter-
gent injection pump. Wear appropriate Personal
Protective Equipment (PPE) whenever handling
the detergent or servicing the detergent injection
pump and lines.
WARNING – SLIPPING HAZARD: To prevent
slips, keep floor dry. Promptly cleanup any
spills or drippage. If spills or drippage are deter-
gents or other chemicals, follow Safety Precau-
tions and handling procedures set forth on deter-
gent or chemical label and/or Material Safety Data
Sheet (MSDS).
Chemical injection pumps are located on service side,
on solution tank.
7.4.1 Squeeze Tube Replacement
See Figure 7-2.
WARNING – ELECTRIC SHOCK AND/OR
BURN HAZARD: Disconnect all utilities to
unit before servicing. Do not service unit unless all
utilities have been properly locked out. Always
follow local electrical codes and safety-related
work practices.
WARNING – BURN HAZARD: Allow unit to
cool down before performing any service on
pump. Piping and valves become very hot during
unit operation.
1. Lock building electrical supply disconnect switch
in OFF position and close unit supply valves.
2. Lift end of pick-up tube out of detergent container.
3. Remove clamps and disconnect tube end from the
feed line.
NOTE: Let squeeze tube content drain off in pan
under pumps.
4. Remove screws on pump cover and lift off pump
cover.
5. Grasp one end of squeeze tube and pull tube out of
pump. Discard tube.
6. Clean all pump surfaces.
7. Lubricate new squeeze tube (P177950-583). Liber-
ally apply lubricant (P117950-599) over tube surface
to within 2" [51 mm] of each end.
8. Insert one end of squeeze tube into pump. Feed tube
through pump by manually rotating roller block.
9. Spread lubricant over rollers in roller block.
10.Replace pump cover and fasten with screws previ-
ously removed.
11.Connect supply and injection hoses to ends of
squeeze tube and attach clamps.
12.Re-energize washer utilities.
7.4.2 Chemical Injection Pump Motor Replace-
ment
See Figure 7-3.
WARNING – ELECTRIC SHOCK AND/OR
BURN HAZARD: Disconnect all utilities to
unit before servicing. Do not service unit unless all
utilities have been properly locked out. Always
follow local electrical codes and safety-related
work practices.
WARNING – BURN HAZARD: Allow unit to
cool down before performing any service on
pump. Piping and valves become very hot during
unit operation.
WARNING – CHEMICAL BURN/EYE INJURY
HAZARD: Wear gloves and eye protection
Figure 7-2. Chemical Injection Pump
Pump Cover
Roller
Block
Squeeze
Tube
Supply
and
Injection
Hoses
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