Service; Cleaning The Agitator Shaft And Seal; Siphon Kit; Servicing The Gear Reducer - Graco 25C483 Instructions - Parts Manual

Service

Service Service
• Moving parts, such as an impeller blade, can
pinch or amputate fingers. To reduce risk of
injury, always disconnect power from the agitator
before performing maintenance or service.
• Improper handling of hazardous fluids or inhaling
toxic fumes can cause serious injury due to
splashing in the eyes, ingestion, or bodily
contamination.
Cleaning Cleaning Cleaning the the Agitator the Agitator Shaft Agitator
NOTICE
NOTICE 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 stub (6) within 1/2
in. (13 mm) of the housing (1), it must be removed
to prevent damage to the bearing seal (13). See
Parts, page 15. 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 material
into the bearing and cause premature failure. See
Servicing the Gear Reducer, page 13
on getting access to the seal and for the Bearing
Replacement Kit Part No.
Cleaning Cleaning Cleaning the the Agitator the Agitator Shaft Agitator
with Siphon

Siphon Kit

Kit
with with Siphon Kit
Follow the procedure below to flush and clean the
siphon tube and agitator shaft. See
25C486, 25C487, 25C488, page 17
identification.
1. Disconnect the VFD power supply.
2. Raise the agitator out of the drum.
3. Remove the plain bearing (37d) from the agitator
shaft and clean it.
4. Detach any siphon tube attachments and flush
the siphon tube (37a).
5. Loosen the retaining nut (37c) on the siphon tube
and slowly lift the siphon tube out of the agitator.
3A4548G
All manuals and user guides at all-guides.com
Shaft and Shaft and Seal and Seal Seal
for instructions
Shaft — — — Models Shaft Models Models
Models 25C485,
for part reference
6. Clean the inside and outside of the siphon tube,
flush the inside of the agitator shaft (33), and
clean the agitator blades (34) and the outside of
the shaft.
7. Reassemble the siphon tube by doing the reverse
of steps 2 through 4.
Servicing the Servicing Servicing the the Gear Gear Reducer Gear
The Bearing Replacement Kit should be on hand
before beginning this procedure.
Replacement Kit, order Part Number 238251.
Disassembling
Disassembling Disassembling
Personal injury or equipment damage may result
from lifting/falling heavy equipment. To avoid
personal injury or equipment damage, do not lift the
drum cover and agitator without proper assistance
Motor and mounting plate assembly weigh
approximately 45 lbs (20 kg). Verify that adequate
personnel are available or a secure lifting device is
available for use in positioning and installing.
The following procedure does not require agitator
removal from the drum. See
reference identification.
1. Disconnect the VFD power supply.
2. Remove the two set screws (17) and the two
motor mounting plate screws (32). Remove the
motor assembly from the back-gear housing
3. If your agitator has a siphon kit, do steps 2
through 4 in Cleaning the Agitator Shaft —
Models with Siphon Kit, page 13
continue with step 3 below. If your agitator does
not have a siphon kit, proceed to step 3 below.
4. Raise and support the drum cover above the
drum high enough to reach the underside.
5. Remove the three hex head screws holding the
agitator to the drum cover.
6. Raise the agitator housing 4 to 6 in. (100 to 150
mm) above the drum cover, and support it at that
height with blocks.
7. Tightly grip the agitator shaft (6) with a clamp to
prevent the shaft from falling into the drum.
8. 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.
NOTE: Before doing the following step, be sure
the agitator shaft is well secured. See step 6.
Service
Reducer Reducer
To order a Bearing
Parts, page 15 for part
and then
13