EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 29
MAINTENANCE (MIXER)
DRUM HEAD SEALS
On each end of the mixing drum there is a drum head
containing self-adjusting graphite seals. These seals
consist of packing rings, split gland and spring activated
adjusters. A properly maintained seal prevents material
from working around the shaft, causing excessive wear.
The following is the suggested procedure of maintenance
for protection of the paddle shaft.
1. Keep drum head clean of material build up so the spring
adjusters are free to work.
2. As the seals naturally wear, material will seep from the
drum head. Tighten the adjusting nuts equally until a
slight pressure is felt (Figure 29). The seals are now
tight. This procedure should be done periodically as
the seals leak.
Figure 29. Drum Seal Adjusting Nuts
3. Once the pressure plate touches the drum, its time to
replace the graphite seals (Figure 30).
Figure 30. Replacing Drum Seals
DRUM BEARING BRACKET LUBRICATION
There is 1 set of drum bearing brackets (Figure 31) that
will require lubrication. These brackets are intended to
make the drum rotate freely. Lubricate the grease fitting
for each drum bearing bracket
every month or when the
drum becomes difficult
to position
using multi-purpose
grade grease.
Figure 31. Grease Fittings (Dumping Mechanism)
HYDRAULIC OIL FILTER
Replace hydraulic oil filter (Figure 32) every 500 hours.
Hydraulic tank capacity is 12 gallons (45 liters). Refill with
any of the following hydraulic oil types. Shell Tellius 68,
Mobil DFE26 or Texaco Rand HDC
Figure 32. Hydraulic Oil Filter
GREASE FITTING
AND CAP
DRUM
BEARING
BRACKET
A
A
A
