The sprinkler pipes must be clean to prevent any blockage
in holes. When cleaning the sprinkler pipes, loosen
the lock nut shown in figure to unscrew and remove the
sprinkler pipes. On reassembling, be sure the alignment
screws ( round head ) are positioned at the top center.
DMA 2117 , DMB 2117 and DMB 6616 upto DMD 1680 have
type A and b sprinkler pipes which these are installed
as A against A and B against B.
(a)
Models : DMA 2116, 2117, 4116, DMB 2116, 2117,
4116 have two way sprinkler
pipes.
(b)
Models : DMA 6616 8416, DMB 6616, 8416 have
four way sprinkler
pipes.
(c)
Models : DMA 1260, DMB 1260 and DMC 1260 have
four way sprinkler pipes.
(d)
Models : DMC 1680 and DMD 1680 have six way
sprinkler pipes.
(e)
Models : DMA 1616, DMB 1616 and DME 1680 have
eight ways sprinkler pipes.
b. Sprinkler hand
Scale or sludge attached to the narrow space shown
as A and B in Figure impedes revolution. If the sprinkler
rotation slows down or even stops despite normal water
flow the sprinkler pipes or, at the beginning of the
season, if the head does not rotate even though the
water is flowing at the same rate as last season, dismantle
the rotary head for cleaning and checking. For dismantling
the small model plastic sprinkler head, refer to figure
and proceed as follows:
For dismantling and reassembling the aluminum sprinkler
head for the large towers, refer figure and proceed
as follows :
Remove the cap and take the nut off. Pull the rotary
part off from the fixed section. This permits checking,
clearing and if necessary, replacement of section A
and B. To replace the lower bearing or oil seal unscrew
set screw and remove from which allows replacement of
parts. When reassembling, do not wet the bearing potion
with water and apply ample anti-corrosion lubricant
Water proof, Lithium soap- radical grease, on bearings
and oil seal position. Also, pay particular attention
when passing the oil seal over the center pole to not
to damage the lips of the oil seal. Since the oil seal
is effective for a limited period, it is desirable to
dismantle and replace it every two or three years.
c. Details of Oilseal and Bearing in sprinkler assembly
S.No.
Sprinkler sizes
Oil Seal No
Bearing No.
CirclipSizes
Screws
S.S. Bolts
Top
Bottom
1.
1 1/4"x2 way
12-22-7
1438 HH
6001 Z
9 mm
-
2.
1 1/4" x 4 way
12-22-7
1438 HH
6001 Z
9 mm
-
3.
2" x 2 way
16-28-7
6003 2Z
6003 2Z
16 mm
-
4.
2" x 4 way
16-28-7
6003 2Z
6003 2Z
16 mm
-
5.
2" 1/2 x 4 way
16-28-7
16-28-7
6003 2Z
16 mm
-
6.
4" x 6 way
25-38-7
6004
6005 Z
19 mm
8 m x
20 mm
7.
4" x 8 way
25-38-7
6004
6005 Z
19 mm
8 m x 20 mm
d. Fan motors bearing details of different make as per
the HP rating
