Difficulty
Moderate
Steps
19
Time Required
Suggest a time??
Sections
5
- Blade Cover
- 5 steps
- Blade
- 3 steps
- Cutting Head
- 1 step
- Bottom Cover
- 2 steps
- Motor
- 8 steps
Flags
0
BackMK Diamond Wet Saw MK660 (2010)
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Introduction
The replacement part is 154292.
What you need
Step 1
Blade Cover
- Before you begin, make sure to power off and unplug the device from the outlet.
- If the clear water pump hose is connected, remove it now.
- Loosen the plastic knob holding the saw’s cutting head in place.
- Lower the cutting head while keeping it steady.
Before you begin, make sure to power off and unplug the device from the outlet.
If the clear water pump hose is connected, remove it now.
Loosen the plastic knob holding the saw’s cutting head in place.
Lower the cutting head while keeping it steady.
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Step 2
- Unscrew the knob.
- Remove it from the cutting head.
Unscrew the knob.
Remove it from the cutting head.
Step 3
- Loosen the plastic knob holding the blade cover in place.
Loosen the plastic knob holding the blade cover in place.
Step 4
- Loosen the wing nut on the blade cover pivot shaft.
- Remove the wing nut and accompanying washer.
Loosen the wing nut on the blade cover pivot shaft.
Remove the wing nut and accompanying washer.
Step 5
- Pivot the blade cover up and pull it off the shaft.
Pivot the blade cover up and pull it off the shaft.
Step 6
Blade
- Insert the provided spanner wrench into one of the four tightening holes on the inner flange behind the blade.
- Use the the provided nut wrench to loosen the hex nut while providing counterforce with the spanner wrench.
Insert the provided spanner wrench into one of the four tightening holes on the inner flange behind the blade.
Use the the provided nut wrench to loosen the hex nut while providing counterforce with the spanner wrench.
Step 7
- Remove the hex nut.
- Remove the outer flange.
Remove the hex nut.
Remove the outer flange.
Step 8
- Remove the cutting blade.
- The blade can be sharp, so handle with care.
Remove the cutting blade.
The blade can be sharp, so handle with care.
Step 9
Cutting Head
- Pull the entire cutting head straight off the shaft holding it in place.
Pull the entire cutting head straight off the shaft holding it in place.
Step 10
Bottom Cover
- Remove the eight Phillips #2 screws on the underside of the cutting head.
Remove the eight Phillips #2 screws on the underside of the cutting head.
Step 11
- Remove the bottom cover.
Remove the bottom cover.
Step 12
Motor
- Remove the Phillips #2 screw holding the ground wires to the chassis.
- Loosen the wires from each other.
- The motor’s ground wire is green with a yellow stripe.
- Reassembly tip: there are three ground wires attached here that will need to be reinstalled upon reassembly.
Remove the Phillips #2 screw holding the ground wires to the chassis.
Loosen the wires from each other.
The motor’s ground wire is green with a yellow stripe.
Reassembly tip: there are three ground wires attached here that will need to be reinstalled upon reassembly.
Step 13
- Remove the black wire’s plug from the 4-pin rectifier.
- These plugs have two wires each, so removing one plug removes two wires.
Remove the black wire’s plug from the 4-pin rectifier.
These plugs have two wires each, so removing one plug removes two wires.
Step 14
- Remove the red/orange wire combo plug from the 4-pin rectifier.
- Use needle-nose pliers if you can’t reach this plug with your fingers.
Remove the red/orange wire combo plug from the 4-pin rectifier.
Use needle-nose pliers if you can’t reach this plug with your fingers.
Step 15
- Be very careful with this connection, as even minimal bending can break the metal conductor in half.
- Use a pick to slightly pry up on the crimped metal arms holding the red and orange wires together.
- Repeat for both sides to loosen the connector.
Be very careful with this connection, as even minimal bending can break the metal conductor in half.
Use a pick to slightly pry up on the crimped metal arms holding the red and orange wires together.
Repeat for both sides to loosen the connector.
Step 16
- Be very careful with this connection, as even minimal bending can break the metal conductor in half.
- Remove the red wire from the orange wire.
Remove the red wire from the orange wire.
Step 17
- Use two flathead screwdrivers to carefully pry the inner flange off the motor shaft.
- You may need to use the two screwdrivers to “walk” the flange off—it’s press-fit onto the shaft. Try prying on various positions of the flange and rotating it as you work.
- Remove the inner flange.
Use two flathead screwdrivers to carefully pry the inner flange off the motor shaft.
You may need to use the two screwdrivers to “walk” the flange off—it’s press-fit onto the shaft. Try prying on various positions of the flange and rotating it as you work.
Remove the inner flange.
Step 18
- Remove the four Phillips #2 screws holding the motor in place.
Remove the four Phillips #2 screws holding the motor in place.
Step 19
- Grab the motor with both hands and tilt it slightly upward.
- While keeping the motor tilted up, pull back and up to clear the electrical components behind the motor.
- Remove the motor.
- You may need to bend the thermal overload switch slightly in order to lift the motor out.
Grab the motor with both hands and tilt it slightly upward.
While keeping the motor tilted up, pull back and up to clear the electrical components behind the motor.
Remove the motor.
You may need to bend the thermal overload switch slightly in order to lift the motor out.
To reassemble your device, follow these instructions in reverse order.
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