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SPRAY SYSTEM
1. Inspect the pump inlet (IN) and discharge (OUT) lines
to make sure they are clear. Obstructed lines will
prevent self-priming of the pump. See Figure 19.
HOSES AND
CLUTCH GUARD
NOT SHOWN
FOR CLARITY
Figure 19. Pump Inspection
2. Inspect all hoses for weak or worn condition, and
replace as necessary.
3. Inspect the O-rings inside each of the quick-connect
fittings for damage or wear (Figure 20). Replace if
necessary.
O-RING
Figure 20. O-Ring Inspection
4. Inspect all hose fitting connections, including the
compressor port. Make sure the suction hose
connection to the IN port on the pump is tightly secured.
A loose connection will cause air to be drawn into the
line, and the pump will not prime itself properly.
PAGE 28 — WSC55 SERIES CHEMICAL SPRAY CART • OPERATION AND PARTS MANUAL — REV. #1 (08/30/19)
OUT
OUT
IN
QUICK CONNECT
FITTING
5. Inspect the spray gun and spray tips for damage or
wear. Replace if necessary.
COMPRESSOR OIL
1. Remove the compressor dipstick and check the
compressor oil level shown on the dipstick (Figure 21).
The oil should be between the dipstick's minimum
and maximum marks. If the oil level is low, fill with the
recommended oil type (Table 7). Maximum compressor
oil capacity is 0.094 quarts (0.09 liters).
Figure 21. Checking Compressor Oil
Table 7. Compressor Oil Type
Ambient Temperature
32
°F (0°C)
Below 32
68°F (20°C)
SAE 10W or
SAE 20W or
ISO 32
TIRE PRESSURE
Inspect the wheels and check the front tire air pressure. The
two front tires should be inflated to approximately 28 psig.
CHEMICAL SUPPLY
For best results, make sure the material to be sprayed is mixed
properly according to manufacturer's recommendations,
and has an even consistency.
INSPECTION
DIPSTICK
COMPRESSOR
°F (0°C) to
°F (20°C) to
68
104°F (40°C)
SAE 30W or
ISO 68
ISO 100
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