Tuff Torq K46BL transaxle (series photo) Click to zoom

Tuff Torq 7A646084152 K46BL Transaxle - Prefilled w/ Oil (Simplicity 1729589)

MPN 7A646084152

Replaces Simplicity 1729589, Simplicity 1729589SM; supersedes 7A646084151, 7A646084150

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Overview

Genuine, brand-new Tuff Torq 7A646084152 (K46BL) hydrostatic transaxle from the Tuff Torq K46 family. Ships prefilled with Tuff Tech oil, ready to bolt in. Free shipping to the lower 48 states.

Part details

Tuff Torq part # 7A646084152
Model K46BL
Prefilled with oil Yes
Replaces OEM # Simplicity 1729589, Simplicity 1729589SM
Supersedes 7A646084151, 7A646084150

Tuff Torq K46 series specifications

Application Rear Engine Riding Mower; Lawn Tractor
Reduction ratio 28.04:1; 21.53:1
Rated axle torque 28.04:1 = 231.4 Nm (171 lb-ft); 21.53:1 = 177.7 Nm (131 lb-ft)
Pump / motor displacement 7/10 cc/rev
Axle shaft 19.05 mm (0.75 in)
Brake Internal Wet Disc
Dry weight 12.5 kg (27.6 lb)

Series data from Tuff Torq. Ratio, pulley, fan and control-arm setup vary by model; match your part number.

Fits these machines

Confirmed against OEM parts catalogs and dealer fit lists for this part number or its OEM number.

  • Simplicity: Regent 18.5HP B&S Hydro RMO (1694967), Regent 18.5HP B&S Hydro RMO (1694968), Regent 20HP B&S Hydro RMO (1694878), Regent 20HP B&S Hydro RMO (1694969), Regent 22HP B&S Hydro RMO (1694879), Regent 22HP B&S Hydro RMO (1695108), Regent 24HP B&S Hydro RMO (1694880), Regent 24HP B&S Hydro RMO (1695109), 2522H 22HP B&S Hydro RMO (1695116)

Mower makers sometimes switch transaxles mid-production, so serial number matters. Not on the list? Send us your model and serial and we'll check.

Make sure it fits

Every Tuff Torq unit has an ID label on the case showing the model (like K46BL) and the 11-digit part number. Match 7A646084152 to that label, or to the OEM number in your mower's parts list. Can't read the label? See How to find your Tuff Torq part number, or send us a photo through the Part Finder and we'll confirm the match before you buy.

More K46 units, repair kits and parts: Tuff Torq K46 hub · All Tuff Torq

FAQ

Is this a genuine Tuff Torq part?

Yes. 7A646084152 is new, genuine Tuff Torq, sold under Tuff Torq's own part number. It is not a rebuilt, used or aftermarket unit.

Will it fit my mower?

Fit depends on your exact model and serial number. Match the part number on your unit's label, or send us your mower details and we'll confirm for free.