Cleaning The Agitator Shaft - Models With; Siphon Kit - Graco 25C483 Instructions - Parts Manual

Electric back-gear drum agitators
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Service
9. 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
housing. Do not lose the two small thrust balls
(4). One in the upper housing, and one in the
lower housing.
10. Turn the 50 mm nut (18) counter-clockwise to
remove it from the agitator shaft.
11. Carefully lift the lower housing off of the agitator
shaft.
Cleaning
Cleaning
Cleaning and
and Servicing
and
Servicing
Servicing
1. Clean any foreign material from the outside of
the upper and lower housings (1 and 2). See
Parts, page
15.
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, seals, and balls.
Reassembling
Reassembling
Reassembling
1. Reposition the lower housing (1) on the agitator
shaft stub (6). See
NOTICE
NOTICE
NOTICE
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.
14
Parts, page
15.
3. Reposition the pinion/gear assembly (10, 15)
in the lower housing, thread the large gear (9)
onto the agitator shaft, and tighten the large gear
hand tight.
4. Make sure the small thrust balls (4) are in place.
5. Carefully lowering it straight down, reposition the
upper housing (2) on the lower housing (1).
6. Replace the two short bolts (11) and the two long
bolts (19) that hold the upper housing and the
lower housing together, and torque the bolts to
75 in-lb (8.5 N-m).
7. Remove the blocks supporting the agitator
housing, and reposition the agitator on the drum
cover.
8. Thread the three hex head screws up through
the drum cover and into the agitator, and torque
them to 75 in-lb (8.4 N-m).
9. If your agitator has a siphon kit, re-install it
by doing the reverse of steps 2 through 4 in
Cleaning the Agitator Shaft — Models with
Siphon Kit, page
13.
Additional Agitator
Agitator Service
Additional
Additional
Agitator
If the unit requires more than installation of a bearing
replacement kit or gear replacement, it is advisable
to send the unit to a Graco distributor for repair or
replacement.
Service
Service
3A4548G

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