Marshalltown 1200MP Mixer - Manual (Page 20)

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TROUBLE SHOOTING GUIDE FOR MP MIXERS
ENGINE WON’T START:
1. Check for sufficient fuel.
2. Check oil level (some engines have an oil alert, preventing the engine from starting when oil level is low)
3. Was engine choked when starting?
4. Is engine flooded?
5. Check spark plug. (Clean and check gap).
6. If engine still won’t start, take to service center.
BELT DRIVEN MODELS:
1. Check condition of belts, replace if necessary.
2. Check for oil or grease on belts as well as for loose belts.
3. Adjust set screw under engine base down until belts are tight.
HYDRAULIC DRIVEN MODELS.
PADDLE ARMS WON’T TURN:
1. Check if clutch rod has been bent or broken.
2. Check if flow control valve moves in forward position.
IF VALVE DOES NOT GO INTO FORWARD POSITION CHECK THE FOLLOWING:
1. Check if linkages are free.
2. Remove stem set screw (Fig 1) and put a few drops of oil in stem.
3. Replace set screw but do not overtighten.
PADDLE ARMS STOP WHEN DRUM IS FILLED:
1. Remove cap (Fig 2) and set pressure up by tightening threaded screw with allen wrench no more than ¼ turn at a time.
Valve pressure is set at 1500 psi at factory. Each ¼ turn will increase the pressure by 250 psi. After each ¼ turn check to
see if paddles turn (CAUTION) maximum pressure of valve is 3000 psi.
REVERSE TOO FAST OR TOO SLOW:
1. Loosen set screw on knob
2. Turn knob a small amount at a time clockwise to slow movement and
counterclockwise to speed up movement