Motor Brush Check/Replacement; Specifications - Cole-Parmer MICROPUMP 75211-10 Manual De Operación

Motor Brush Check/Replacement

WARNING: Unplug Drive prior to checking/replacing MOTOR BRUSHES.
Note: Brushes should be checked every 6 months, or approximately 500 operating hours or if erratic operation occurs.
1. Place the POWER Switch (O/I) in the O (OFF) position.
2. Disconnect the AC power input line cord from the AC receptacle.
3. Remove the four screws from each side of the housing and lift off the housing.
4. Carefully unscrew each brush cap on opposite sides of the motor (Figure 2). Withdraw the brush, and examine
it for wear.
Note: Replace both brushes if either brush is less than 0.300 in (7.6 mm) long from base to point.
5. Insert brushes and install brush cap on each side of motor.
6. Install housing and secure with the four screws on each side.
7. Connect the AC power input line cord to the AC receptacle.
Output:
Speed, Max.:
Model 75211-10, -15
Model 75211-60, -62, -65, -67
Speed, Min.:
Model 75211-10, -15
Model 75211-60, -62, -65, -67
Torque output, Maximum:
Flow-range:
Model 75211-10, -15
Model 75211-60, -65
Model 75211-62, -67
Figure 2. Typical Brush Replacement

SPECIFICATIONS

5000 rpm
9000 rpm
50 rpm
90 rpm
12 oz-in (85 mN•m)
2.5 to 5450 mL/min (purchase pump head separately)
0 to 7.0 gpm (with provided pump head)
0 to 7.0 gpm (purchase pump head separately)
4