Part Location Diagram of 918-06991 MTD Lawn Tractor Mandrel Assembly
See part H-1 in the diagram
( Grid squares measure 1x1 inch )

Lawn Tractor Mandrel Assembly 918-06991

Manufactured by:
MTD
ERP Number:
ERP11813294
Part Number:
918-06991
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(1 rated repair) ?

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Product Description

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This mandrel assembly is for lawn tractors. The mandrel assembly attaches to the mower deck and spins the blades. The assembly may include multiple parts; refer to your parts diagram for a complete list of parts included. Wear work gloves to protect your hands when installing this part.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • Craftsman
  • MTD
  • Yard Machines
  • Murray
  • Husky
  • Troy-Bilt
  • Yard Man
This part works with the following products:
  • Lawn Tractor
  • Lawn Mower
Part# 918-06991 replaces these:
618-06991, 918-06991, 918-06991-CM,

Customer Part Reviews

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4.3
Average Rating (out of 5):
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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

Easy 

15 - 30 mins 

(1 rated repair) ?
  • 1
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Sorry, we couldn't find any existing installation instruction that matched.

Spindle housing/ shaft worn causing blade to cut unlevel- 4 seasons of use.

Gregory from Corinna, Maine

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Socket set
Parts Used:
918-06991
Preparation: Drain fuel tank, disconnect and remove battery (positive wire first).

1. Hoist lawn tractor from front axles with small chain, with rear wheels just touching ground.
2. With Ryobi Impact driver and 15/16\" Impact Socket remove Blade Nut.
3. With appropriate socket wrench remove spindle shroud (1/4-20 bolts- 3ea).
. Disengage Mower Drive Belt clutch and remove mower drive from spindle pulley.
4. With Ryobi Impact driver and 1/2\" Impact Socket remove (4) 3/8\"-18 x 2/4\" Spindle mount bolts.
5. Clean all removed hardware and lightly grease all hardware for reinstallation. Replace any hardware that is unserviceable.
6. Clean deck where spindle is mounted. I used a pressure washer.
7. Reinstall new spindle, drive belt, drive belt shroud, and blade.
8. Lower lawn tractor slowly being careful not to get in the way.
9. Perform Tool inventory and reinspect all mechanisms for function and obstructions.
10. Refill gas tank.
11. Start Lawn Tractor.
12. Engage lawn mower deck, perform test cut. End.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP11813294
Manufacturer Part Number: 918-06991
Brand Model Number Description
MTD 131278XS099 Lawn Tractor - Front-Engine Lawn Tractor
Yard Machines 13A2775S000 Lawn Tractor - Lawn Tractor
MTD 13A277KS897 Lawn Mower - MTD Lawn Mower Model 13A277KS897 Parts
Craftsman 13A277XS099 Lawn Mower - Craftsman Lawn Mower Model 13A277XS099 Parts
Craftsman 13A277XS299 Lawn Mower - Craftsman Lawn Mower Model 13A277XS299 Parts
Craftsman 13A278XS099 Lawn Mower - Craftsman Lawn Mower Model 13A278XS099 Parts
Craftsman 13A278XS299 Lawn Mower - Craftsman Lawn Mower Model 13A278XS299 Parts
MTD 13A878XS099 Lawn Tractor - Lawn Tractor
MTD 13A879KS897 Lawn Mower - MTD Lawn Mower Model 13A879KS897 Parts
MTD 13AB775S000 Lawn Tractor - Front-Engine Lawn Tractor
MTD 13AB77XS091 Lawn Tractor - Front-Engine Lawn Tractor
MTD 13AD775S059 Lawn Tractor - Lawn Tractor
Craftsman 13AD78XS099 Lawn Mower - Craftsman Lawn Mower Model 13AD78XS099 Parts
MTD 13AL77XT099 Lawn Tractor - Front-Engine Lawn Tractor
MTD 13AL78XS093 Lawn Tractor - Front-Engine Lawn Tractor
MTD 13AL795S004 Lawn Tractor - Lawn Tractor
Yard Machines 13AM775S000 Lawn Tractor - Lawn Tractor
MTD 13AM775S200 Lawn Mower - MTD Lawn Mower Model 13AM775S200 Parts
Yard Man 13AN772S055 Lawn Tractor - Lawn Tractor
Yard Machines 13AN775S345 Lawn Tractor - Yard Machines 42 Inch Lawn Tractor, 17.5hp
Husky 13AN77SS031 Lawn Tractor - 42 Inch Lawn Tractor (2018)
Husky 13AN77SS231 Lawn Tractor - 42 Inch Lawn Tractor (2019)
MTD 13AN77XS093 Lawn Tractor - Front-Engine Lawn Tractor
Craftsman 13AP78XS099 Lawn Mower - Craftsman Lawn Mower Model 13AP78XS099 Parts
MTD 13AX795S004 Lawn Tractor - Lawn Tractor
Yard Machines 13BB77SS345 Lawn Tractor - Yard Machines Lawn Tractor
Murray 13BM772S058 Lawn Tractor - Lawn Tractor
MTD 13BP78XS099 Lawn Tractor - Front-Engine Lawn Tractor
Troy-Bilt 13WM77KS011 Lawn Tractor - LT5 LawnTractor
Troy-Bilt 13WV78KS011 Lawn Tractor - Transmatic Lawn Tractor -- Bronco