Introduction
This manual provides essential information for the installation, operation, and maintenance of the 1PK Murray M115-38 Lawn Mower Deck Rebuild Parts Kit. This kit is designed to replace key components of a 38-inch lawn mower deck, specifically for Murray M115-38 and 13BC76LF058 (2014) models. Proper installation and maintenance are crucial for the safe and efficient operation of your lawn mower.
Product Components
The 1PK Murray M115-38 Lawn Mower Deck Rebuild Parts Kit includes the following components:
- (1) Deck Belt: A 77-3/4" x 1/2" deck belt, designed for power transmission within the mower deck. Replaces MTD part number 954-04062.
- (2) Standard Lift Heavy-Duty Blades: Two 19-5/16" blades, engineered for efficient grass cutting and durability. Replaces MTD part number 942-0610A.
- (1) Idler Pulley: One idler pulley, essential for maintaining proper belt tension and routing. Replaces MTD part number 756-04129B.
- (2) Spindle Assemblies: Two spindle assemblies, which include grease fittings for lubrication. These assemblies are crucial for mounting and rotating the mower blades. Note: Hardware for installation is NOT included with the spindle assemblies. Replaces MTD part number 918-04474A.
Figure 1: Contents of the Lawn Mower Deck Rebuild Parts Kit. From top to bottom: deck belt, idler pulley, two mower blades, and two spindle assemblies.
Setup and Installation
Safety First: Before beginning any work on your lawn mower, ensure the engine is off, the spark plug wire is disconnected, and the mower deck is disengaged. Wear appropriate personal protective equipment, including gloves and eye protection.
- Prepare the Mower: Park the mower on a flat, stable surface. Disconnect the spark plug wire to prevent accidental starting. If possible, raise the front of the mower or remove the deck for easier access.
- Remove Old Components:
- Carefully remove the old deck belt, noting its routing path for reinstallation.
- Unbolt and remove the old idler pulley.
- Remove the mower blades. Use a block of wood to prevent the blade from turning while loosening the retaining bolt.
- Unbolt and remove the old spindle assemblies. Note the orientation and any shims or spacers.
- Install New Spindle Assemblies: Position the new spindle assemblies in their correct locations on the deck. Secure them with the appropriate bolts and hardware (hardware not included with these spindle assemblies). Ensure they are tightened to the manufacturer's specifications.
- Install New Blades: Attach the new blades to the spindle assemblies. Ensure the cutting edge of the blade is facing the correct direction (typically towards the deck when viewed from below). Tighten the blade bolts securely.
- Install New Idler Pulley: Mount the new idler pulley in its designated position and secure it firmly.
- Install New Deck Belt: Route the new deck belt according to the mower's diagram or the path noted during removal. Ensure the belt is properly seated in all pulleys and tensioned correctly by the idler pulley.
- Final Checks: Before reconnecting the spark plug, manually rotate the blades to ensure they spin freely and do not contact any part of the deck. Verify all bolts are tightened.
Operating Considerations
After installing the new components, perform a test run in a clear area. Listen for unusual noises, vibrations, or poor cutting performance. If any issues are detected, immediately shut off the mower and re-inspect the installation.
- Blade Engagement: Ensure the blades engage smoothly and disengage completely.
- Belt Tension: Verify the deck belt maintains proper tension during operation.
- Cutting Quality: Observe the quality of the cut. Uneven cuts may indicate improperly installed blades or other deck issues.
Maintenance
Regular maintenance of your mower deck components will extend their lifespan and ensure optimal performance.
- Blade Sharpening/Replacement: Regularly inspect blades for sharpness and damage. Sharpen dull blades or replace bent/damaged blades to ensure a clean cut and prevent strain on the engine.
- Spindle Lubrication: The spindle assemblies include grease fittings. Lubricate these fittings periodically with appropriate grease using a grease gun, as recommended by your mower's manufacturer.
- Belt Inspection: Check the deck belt for cracks, fraying, or excessive wear. Replace the belt if any signs of damage are present.
- Deck Cleaning: After each use, clean grass clippings and debris from the underside of the mower deck to prevent buildup, which can affect cutting performance and promote rust.
- Hardware Check: Periodically check all bolts and nuts on the deck components, especially blade and spindle mounting bolts, to ensure they remain tight.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Uneven Cut | Dull or bent blades; improperly installed blades; uneven tire pressure. | Sharpen or replace blades; ensure blades are installed correctly; check tire pressure. |
| Excessive Vibration | Unbalanced or bent blades; loose spindle assembly; worn spindle bearings. | Inspect and balance/replace blades; tighten spindle mounting bolts; replace worn spindle assemblies. |
| Belt Slipping or Coming Off | Incorrect belt routing; worn belt; faulty idler pulley; worn pulley bearings. | Re-route belt correctly; replace worn belt; inspect/replace idler pulley or its bearings. |
| Blades Not Engaging | Belt dislodged or broken; issue with PTO engagement mechanism. | Check belt routing and condition; consult mower's main manual for PTO issues. |
Specifications
- Product Type: Lawn Mower Deck Rebuild Parts Kit
- Brand: 1PK
- Compatible Mower Models: Murray M115-38, 13BC76LF058 (2014) 38" Lawn Mower
- Deck Belt Size: 77-3/4" x 1/2" (Replaces MTD 954-04062)
- Blade Size: 19-5/16" Standard Lift Heavy-Duty (Replaces MTD 942-0610A)
- Idler Pulley: (Replaces MTD 756-04129B)
- Spindle Assemblies: With Grease Fittings (Replaces MTD 918-04474A)
Warranty and Support
Specific warranty information for this 1PK product kit is not provided in this manual. For details regarding warranty coverage, returns, or technical support, please refer to the product packaging or contact the manufacturer directly. It is recommended to retain your purchase receipt for warranty claims.
For general inquiries related to your Murray lawn mower, please consult your mower's original owner's manual or contact Murray customer service.
