Service; Cleaning The Agitator Shaft And Seal; Cleaning The Agitator Shaft With Siphon; Kit - Graco 25C483 Instructions-Parts List Manual

Service

Cleaning the Agitator Shaft and Seal

NOTICE
Keep the agitator upright. Do not lay it on its side
or upside down or liquid may flow down the shaft
and into the gear reducer area, which will damage
the equipment.
If any material is on the shaft (6) within 1/2 in. (13
mm) of the housing (1), it must be removed to prevent
damage to the bearing seal (13). If the flexible lips on
the bearing seal are torn or worn such that they do
not make contact all the way around the shaft, the
seal must be replaced. A worn seal may allow foreign
mate- rial into the bearing and cause premature
failure. See Servicing the Gear Reducer, page 11
instructions on getting access to the seal and for the
Bearing Replacement Kit Part No.
Cleaning the Agitator Shaft with
Siphon Kit
The procedure for flushing and cleaning the siphon
tube (37) and agitator shaft (6) is as follows:
1. Raise the agitator out of the drum.
2. Remove the plain bearing (40) from the agitator
shaft and clean it.
3. Detach any attachments from the siphon tube
and flush the siphon tube.
4. Loosen the retaining nut on the siphon tube and
slowly lift the siphon tube out of the agitator.
5. Clean the inside and outside of the siphon tube,
flush the inside of the agitator shaft, and clean the
agitator blades (34) and the outside of the shaft.
6. Reassemble the siphon tube by doing the reverse
of steps 2 through 4.

Servicing the Gear Reducer

You may want to have the Bearing Replacement
Kit on hand before you begin this procedure.
order a Bearing Replacement Kit, order Part Number
238251.
Disassembling
The following procedure does not require that you
remove the agitator from the drum of material:
1. If your agitator has a siphon kit, do steps 2
through 4 in Cleaning the Agitator Shaft with
Siphon Kit, page 11. If your agitator does not
have a siphon kit, proceed to step 2 below.
3A4548A
2. Raise/support the drum cover above the drum
high enough so that you can reach the underside
of it.
3. Remove the three hex head screws holding the
agitator to the drum cover.
4. Raise the agitator housing 4 to 6 in. (100 to 150
mm) above the drum cover, and support it at that
height with blocks.
5. Tightly grip the agitator shaft with a clamp to
prevent the shaft from falling into the drum.
6. Remove the two short bolts (11) and the two long
bolts (19) that hold the upper housing (2) and the
lower housing (1) together. Carefully lift the upper
housing straight up off of the lower housing.
7. Turn the large gear (9) counter-clockwise to
remove it from the agitator shaft, and lift the
pinion/ gear assembly (10, 15) out of the lower
for
housing.
NOTE: Before doing step 8, be sure the agitator
shaft is well secured. See step 5.
8. Turn the 50 mm nut (18) counter-clockwise to
remove it from the agitator shaft.
9. Carefully lift the lower housing off of the agitator
shaft.
Cleaning and Servicing
1. Clean any foreign material off of the outside of
the upper and lower housings (1 and 2).
NOTE: Do not lose the two small thrust balls (4).
One is in the upper housing, and one is in the
lower housing.
2. Inspect the parts for any wear. If any of the
parts are worn or damaged, replace them. The
Bearing Replacement Kit contains replacement
bearings and seals.
Reassembling
NOTE: See the
Parts — Agitator with or without Siphon, page 16
proper bearing and seal placement and orientation.
To
1. Reposition the lower housing (2) on the agitator
shaft.
To prevent damage to the bearings and seals,
avoid scraping them against the threaded
agitator shaft while lowering the lower housing
in place.
2. Thread the 50-mm nut (18) onto the agitator shaft
by turning it clockwise, and tighten it hand tight.
Service
NOTICE
for
11