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Repair Parts Home  Lawn Equipment Parts  Murray Parts  770037MA Cutting Disc Assembly

Cutting Disc Assembly

Part Number: 770037MA
Availability: 6 in stock
Price: $117.07
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*This part replaces obsolete part #: 740175-860MA, 740175833MA, 740175848MA, 740175E020MA, 740175E700MA, 740175E701MA, 740175E549MA, 740175E276MA and 740168MA.

It is a genuine item that is supplied by the original equipment manufacturer and is specially designed for use with Murray string trimmers. This is an authentic replacement for a missing or damaged disk assembly which holds the string to cut the grass. It is made of high-quality black plastic and is sold individually, keep in mind the guide assembly and other components are all sold separately. Please refer to the appropriate diagrams of your model for the correct location and application of this hardware.
Product Information
Manufacturer: Murray
Product Number: 770037MA
Classification: Part
Weight: 1.66 lbs.
Shipping: Ships Worldwide
Related Products
Products Compatibility

This item works with the following types of products:

  • • Trimmer
Questions & Answers

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Repair Instructions: Submitted by Customers Like You
0 of 1 people found this instruction helpful
Tool Type:
Parts Used:
Cutting Disc Assembly - 770037MA
Spring Lock Washer, .256X.487X.062 Z - 7090052SM
Control, Throttle - 740194MA
Guide, Height - 740157MA
Spacer, Shield - 740210MA
Spacer, Abrasion - 740209MA
Screw - 180022MA
Repair Difficulty:
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Hex wrench 1/8\\
Throttle control broken; Height guide missing, cutting disc & cutting shaft damaged.
Replacement of the throttle cable was straightforward, requiring only a Philips screwdriver and pliers.
Replacement of cutting shaft, cutting disc and height guide required removal of the cutting sub assembly from the trimmer but was also straightforward using a socket set. The cutting disc is held on the shaft with a 1/8" hex set-screw, the only slightly non-standard tool required for the job. Cleaning the set-screw in order to insure you can completely engage the hex wrench is a good idea, as I found considerable torque was needed to break the screw loose.
When replacing the cutting sub assembly on the trimmer, be sure the belt is still properly threaded past the two tensioning pulleys.
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