HDA SERIES WALK-BEHIND TROWEL • OPERATION MANUAL — REV. #0 (12/1/17) — PAGE 35
Engine Oil
1. Remove the drain bolt and sealing washer, and allow
the oil to drain into a suitable container (Figure 51).
Figure 51. 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 52) and clean it with a
wire brush if it is to be reused. Replace the spark plug
if the insulator is cracked or chipped.
Figure 52. Spark Plug
NOTICE
ALWAYS drain the engine oil while the oil is warm.
DRAIN
BOLT
SEALING
WASHER
OIL FILLER
DIPSTICK
GAP
:
0.028 – 0.031 in.
(0.7 – 0.8 mm)
MAINTENANCE
2. Using a feeler gauge, adjust the spark plug gap
(Figure 52). 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 53) to determine if it is frayed,
peeling, full of tiny cracks, has pieces of rubber missing,
or is otherwise damaged.
Figure 53. V-Belt Inspection
2. Inspect the V-belt (Figure 53) 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.
GLAZED
OIL-SOAKED
BROKEN
CORD FAILURE
CRACKS
MISSING
RUBBER
SIDEWALL
WEAR
WORN BACK
COVER
