John Deere LA155 Lawn Tractor

John Deere’s OMGX23404 I9 operator manual covers LA155 tractors from PIN 300001 onward. For that range, it lists a Briggs & Stratton model 40 twin-cylinder engine and a Tuff Torq HD K46 hydrostatic transaxle. Deere also documents an LA155 with a 48-inch mower. If you are checking a used tractor or buying parts, start with its tractor, engine and deck identifiers; the model name alone cannot confirm what is fitted.

Match the manual to the tractor

Deere’s product identification page places the tractor PIN on the left side of the frame and asks owners to record the engine serial number. Check those identifiers before applying the I9 specifications. For the covered LA155, they give 656 cc displacement and a 15.1 L (4 US gal) fuel tank. A different PIN or installed engine calls for the matching manual and parts record.

Does the LA155 have 22 horsepower?

The I9 specification table does not rate the LA155’s horsepower. A 2010 John Deere dealer offer described an LA155 with a 22-hp V-twin and 48-inch Edge mower. Deere’s parts store also lists a 22-hp replacement engine assembly compatible with LA155. The offer describes a marketed configuration; the parts listing describes a compatible replacement. Neither verifies the original engine on an individual used tractor. Read its engine label and serial number before relying on an advertised power figure.

Identify the 48-inch mower before ordering parts

Deere’s LA155 with 48-inch deck maintenance sheet lists mower belt GX21833, 48-inch 3-in-1 blade GY20852 and mulch cover kit GY20417. The I9 manual specifies three rotary blades for its 48-inch mower. These references describe that documented setup; they do not establish which deck is installed on every LA155. Record the deck serial number and confirm current parts fit before buying a belt, blade or cover.

Checks for a used LA155

1. Compare the tractor PIN, engine serial number and deck identification with the seller’s description. Read the hour meter and service reminder, then ask for service records; hours alone do not show what maintenance was done.
2. Use Deere’s mower-level check and its seat-switch and attachment-engagement procedures. Ask a Deere dealer to inspect a failed safety check before use; do not improvise a live-blade test.
3. If the property has slopes, read Deere’s tipping precautions before operating. That manual directs mowing up and down slopes, not across them, and warns against mowing on wet grass.