CA4HC WALK-BEHIND TROWEL • OPERATION MANUAL — REV. #1 (06/24/20) — PAGE 35
3. Clean the foam element in warm, soapy water or a
nonflammable
solvent. Rinse and dry thoroughly. Dip
the element in clean engine oil and completely squeeze
out the excess oil from the element before reinstalling.
Engine Oil
1. Remove the drain bolt and sealing washer, and allow
the oil to drain into a suitable container (Figure 38).
Figure 38. Draining Engine Oil
2. Replace the engine oil with the recommended oil type
listed in Table 5. For engine oil capacity, see Table 2.
DO NOT
overfill.
3. Reinstall the drain bolt with sealing washer and tighten
securely.
Spark Plug
1. Remove the spark plug (Figure 39) and clean it with a
wire brush if it is to be reused. Replace the spark plug
if the insulator is cracked or chipped.
NOTICE
Operating the engine with loose or damaged air cleaner
components can allow unfiltered air into the engine,
causing premature wear and failure.
NOTICE
ALWAYS
drain the engine oil while the oil is
warm
.
DRAIN
BOLT
SEALING
WASHER
OIL FILLER
DIPSTICK
MAINTENANCE
Figure 39. Spark Plug
2. Using a feeler gauge, adjust the spark plug gap
(Figure 39). The gap should measure 0.028–0.031
inch (0.7–0.8 mm).
3. To prevent cross-threading, thread the spark plug into
the cylinder hole by hand, then tighten securely.
V-Belt
1. Inspect the V-belt (Figure 40) to determine if it is frayed,
peeling, full of tiny cracks, has pieces of rubber missing,
or is otherwise damaged.
Figure 40. V-Belt Inspection
2. Inspect the V-belt (Figure 40) to determine if it is
oil-soaked or
glazed
(a hard, shiny appearance on the
sides of the belt). Either of these conditions can cause
overheating of the belt, which can weaken the belt and
increase the possibility of it breaking.
3. Replace the V-belt immediately if any of the above wear
conditions are observed.
GAP
:
0.028 – 0.031 in.
(0.7 – 0.8 mm)
GLAZED
OIL-SOAKED
BROKEN
CORD FAILURE
CRACKS
MISSING
RUBBER
SIDEWALL
WEAR
WORN BACK
COVER
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order
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