EM-70 PLASTER/MORTAR Mixer Maintenance Mixer

GREASE FITTING

AND CAP

EM-70 PLASTER/MORTAR MIXER — 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 26). The seals are now tight.This procedure should be done periodically as the seals leak.

Drum Bearing Bracket Lubrication

There is 1 set of drum bearing brackets (Figure 28) 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.

GREASE FITTING

DRUM BEARING AND CAP BRACKET

Figure 26. Drum Seal Adjusting Nuts

3.Once the pressure plate touches the drum, its time to replace the graphite seals (Figure 27).

Figure 28. Grease Fittings (Dumping Mechanism)

	CAUTION	Lubricating the
	CAUTION	Grease Fittings

Failure to lubricate the drum bearing grease fittings periodically will cause the dumping mechanism to stiffen, making the mixing drum hard to dump.

Ball Socket and Clamp Face Maintenance

1.If the towing vechicle is equipped with a ball socket, smear socket periodically with multi-purpose grease. This will keep the ball socket well lubricated.

2.Periodically oil pivot points and clamp face surfaces of coupler with SAE 30 WT. motor oil.

3.When parking or storing your mixer. Keep the coupler off the ground so dirt will not build up in the ball socket.

Figure 27. Replacing Drum Seals

PAGE 30 — EM-70 PLASTER/MORTAR MIXER — OPERATION MANUAL — REV. #1 (008/10/04)

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