EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 35
TROUBLESHOOTING (MIXER)
Troubleshooting (Mixer)
Symptom Possible Problem Solution
Blades will not rotate.
Material load too heavy, exceeding
mixer capability?
Reduce amount of material being
mixed.
Object stuck inside mixing drum,
jamming paddle rotation?
Stop engine. Empty out drum
contents. Remove obstruction.
Improper engine speed? Check and adjust engine speed.
Incorrect relief valve pressure? Inspect for proper relief pressure.
Defective hydraulic motor or pump? Contact MQ Technical Services.
Slow hydraulic cylinder dumping? Defective cylinder seal.
Material leaking from drum ends. Worn or defective paddle shaft seals? Replace seals.
Drum diffi cult to discharge (tilt).
Defective or worn drum support
brackets?
Apply grease to bracket or replace.
Blades adjusted too tight.
Adjust blades until they almost touch
side walls of drum.
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