Tuff Torq K57K transaxle (series photo) Click to zoom

Tuff Torq 7A646084230 K57K Transaxle (Simplicity 1722668)

MPN 7A646084230

Replaces Simplicity 1722668, Simplicity 1734348

Free shippingLow Price GuaranteeIn stockParts

Overview

Genuine, brand-new Tuff Torq 7A646084230 (K57K) hydrostatic transaxle from the Tuff Torq K57 family. Free shipping to the lower 48 states, and our Low Price Guarantee covers it.

Part details

Tuff Torq part # 7A646084230
Model K57K
Replaces OEM # Simplicity 1722668, Simplicity 1734348
Matching repair kit 1A646099622

Tuff Torq K57 series specifications

Application Rear Engine Riding Mower; Lawn Tractors; 4WD Tractors and Mowers; Ride-on Mowers; Articulating Mowers; Estate Tractors
Reduction ratio 31.68:1; 28.04:1; 21.53:1
Rated axle torque 31.68:1 = 255 Nm (188 lb-ft); 28.04:1 = 235.4 Nm (174 lb-ft); 21.53:1 = 180.7 Nm (133 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

Listed by parts dealers for this part number or its OEM number. Please confirm with the number on your unit's label.

  • Simplicity: Broadmoor 1695223 (20HP B&S, CE/Export) - K57K 1734348, Broadmoor 16/18/20HP Hydro (1693965, 1694009, 1694228, 1694277, 1694429, 1694468, 1694629, 1694630, 1694632, 1694682, 2690005), 1606 (1693987, 1694018, 2690009, 2690010), 1616H (1694465, 2690095, 2690096), 1618 (1694467, 2690097), 1620H (1694633, 1694634, 2690279, 2690280), 2606 (1693998, 1694027, 2690012, 2690013), 2616 (1694431, 2690079, 2690080, 2690081), 2618 / 2618H (1694469, 1694807, 1694844), 2620H (1694635, 1694636, 1694981), 2626 Honda (1694281, 2690014, 2690053), Regent 22HP 2690940 / 2690940-01, Regent EX 2691131-00
  • Simplicity (catalog): LT 9000 2691144-00 (22HP, 46in)

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 K57K) and the 11-digit part number. Match 7A646084230 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 K57 units, repair kits and parts: Tuff Torq K57 hub · All Tuff Torq

FAQ

Is this a genuine Tuff Torq part?

Yes. 7A646084230 is new, genuine Tuff Torq, sold under Tuff Torq's own part number. It is not a rebuilt, used or aftermarket unit.

What if I find it cheaper?

Tell us before you order. Under our Low Price Guarantee we beat any advertised, in-stock U.S. price on the same new Tuff Torq part by 5%, comparing delivered prices.

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.