4-2012
Blitz 45 - 50 - 55
71
13.6 - FAN BELT TENSIONER
Check length “L” of the spring (refer to Picture): it should be in tension between
9
and
12
cm.
00619
00230
L = 9 ÷ 12 cm
4. Remove the two collar (5) fastening bolts,
fixing the fan casing to the rear cover.
5. Extract the fan casing (2).
The impeller hasn’t to be disassem-
bled.
7. Clean the impeller, by avoiding to use high
pressure water jets: they can cause infiltra-
tions into the fan shaft support and conse-
quently damage the bearings.
8. Mount back the casing (2), by paying a
particular attention to get it perfectly coupled
with the rear cover.
9. Fasten the fan casing, with the collar (5), to
the rear cover and with the collar (1) to the
connection tunnel of the spray-head.
Carefully tighten all the fastening
collars’ bolts.
If the fan control belt has to be replaced, the correct tensioning of the same one
(spring length) has to be OBLIGATORILY checked after the first and after the
second operation hour.
If the value measured exceeds 12 cm, tighten the belt tightener screw, up to get
the minimum length (9 cm).
The belt setting will take place within the first 2÷3 operating hours; when that time has elapsed, verify
the spring length, according with the time intervals (periodicity) indicated in the “Maintenance
operations’ table”.
1
2
LEGEND
1. UNION FASTENING COLLAR
2. FAN CASING
3. IMPELLER
4. SCREW NUT
5. FAN CASING FASTENING COLLAR
00251
3
4
5
Содержание BLITZ 45
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