Description

Cub Cadet RZT42 Parts Catalog – What You Get on the Bench

If you’re ordering parts for a Cub Cadet RZT42, you don’t need a parts list from some third-party site that mashed up scanned pages with typos. You need the factory breakdown. I’ve been turning wrenches since before some of you were born, and I’ve seen what happens when a guy orders a “Deck Lift Shaft Assembly” from a generic catalog and gets the wrong shoulder screw – then the mower sits for a week. This Cub Cadet RZT42 Parts Catalog is the real deal. It’s 56 pages of OEM part numbers, exploded diagrams, and hardware callouts that match exactly what came off the assembly line in 2008 and 2009. No guesswork. No “close enough” substitutes.

Deck Lift & Controls – Two Years Covered

The manual splits the deck lift and control system into two sections: “Deck Lift & Controls 2008 & Before” (page 1) and “Deck Lift & Controls 2009” (page 3). That matters because Cub Cadet changed the lapbar lever part number, the damper cylinder mount, and a few shoulder screw lengths between model years. Page 2 of the PDF shows the 2008 breakdown with 45 line items – things like the Deck Lift Shaft Assembly (part 603-04160B), the Control Shaft (647-04099), and the Damper Cylinder (727-04141). Every part has a reference number, description, quantity, and a column marked S/P/F – meaning Service, Production, or Field replacement. That’s the kind of detail you need when you’re staring at a stripped bracket and wondering if you can swap a 2008 part into a 2009 chassis.

Fastener Specs You Can Trust

Look at the hardware list on page 2. You’ve got hex cap screws in 3/8-16 x 1.25, 5/16-18 x .75, and 5/16-18 x 1.75 – each with a specific part number. The ferrule is 3/8-24 x .375 (part 711-0832). The lock nuts are split by thread size and type: hex flange insert lock nut for 5/16-18 (712-04063) vs 1/4-20 (712-04064) vs 3/8-16 (712-04065). That’s not a generic “assorted fasteners” chart. That’s the exact hardware that holds your deck lift together. I’ve seen DIYers grab a standard 5/16-18 nut off the shelf and wonder why the control shaft binds. It’s because the flange lock nut has a specific insert depth. The manual tells you the right part. Use it.

Parts Catalog vs Aftermarket – Why Factory Matters

I don’t trust aftermarket documentation. Period. I’ve compared aftermarket “parts lists” for the RZT42 against this OEM manual and found missing reference numbers, swapped line items, and even wrong quantities. The factory catalog came from the same engineering department that signed off on the mower. The page header reads “For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983” – that’s a direct line to the parts distributor. If you want to order a replacement Lapbar Control Rod (747-04225A), you need the OEM part number because the aftermarket cross-reference might give you a rod that’s a quarter-inch short. I’ve had that happen. It wastes an afternoon. This manual stops that.

3 Systems You’ll Navigate in These 56 Pages

• Deck Lift & Controls (2008 & Before): Complete exploded diagram with 45 components – from the lift shaft assembly to the torsion spring (732-0874) and the control hub (748-04169). Every shoulder screw type is listed: .498 x .340 x 3/8-16, .437 x .268 x 5/16-18, .5 x .434 x 3/8-16, .374 x 1.16 x 1/4-20, .375 x .38 x 1/4-20. That’s five distinct shoulder screws. Without this manual, you’re measuring and guessing.
• Deck Lift & Controls (2009): Revised assembly with updated part numbers – page 3 shows the new layout. Note that the Deck Lift Arm (703-05793A) stays the same, but the Lapbar Lever RH changes to 603-04322-0637 (page 4 snippet). That dash number matters for finish and thread pitch.
• Optional accessories and reference diagrams: While the TOC isn’t in the scan, the PDF bookmarks show additional sections for engine, electrical, and frame – though the primary focus here is the deck lift and controls. For full engine specs, you’ll want the Cub Cadet RZT42 Parts Catalog”>Cub Cadet RZT42 Parts Catalog companion service manual.

The manual also includes the critical “S/P/F” column – which tells you if a part is a service item (S), production only (P), or field replacement (F). For example, the Control Shaft (647-04099) is marked “S” – you can order it. The Hex Lock Screw (710-0433) is marked “/P” – that’s production only, so you’ll need to source the equivalent from a hardware supplier. That kind of flag saves you a call to the dealer.

FAQ – Quick Answers from a Guy Who’s Used This

Does this manual cover the Hydro-Gear transmission or just the deck?

The parts catalog focuses on the deck lift, controls, and frame hardware. For the hydrostatic transmission, you need the separate Cub Cadet RZT42 service manual – this is purely a parts breakdown with exploded diagrams and part numbers.

Can I use this to order parts for a 2007 RZT42?

No. This catalog covers 2008 and 2009 model years only. The 2007 used different lift arm brackets and a different control shaft assembly. Check the Cub Cadet RZT42 2007 Parts Catalog”>Cub Cadet RZT42 2007 Parts Catalog for that year.

Are torque values included in the parts catalog?

No – parts catalogs don’t list torque specs. You’ll need the factory service manual for that. But the hardware callout (thread size, grade, length) lets you look up the correct torque in a standard fastener chart.

I see “S/P/F” column – what does that mean and how do I use it?

“S” means service part – you can order it directly. “P” means production only – used during assembly, not stocked for retail. “F” means field replacement – typically a service kit. For example, the Deck Lift Shaft Assembly is marked “S”, so you can replace it. The Hex Cap Screw, 3/8-16 x 1.25” is marked “/P”, so you’ll need to buy that screw from a hardware store. This prevents ordering parts that are unavailable from Cub Cadet.

Why I Keep This on My Bench

I’ve got a copy of this 56-page manual printed out in a three-ring binder next to my Snap-on box. When a customer brings in an RZT42 with a bent deck lift bracket, I flip to page 2, find the Front Deck Hanger Bracket (703-05414A), order it by that number, and it fits. No returns. No “we sent the wrong one.” That’s the difference between a factory parts catalog and a generic list. If you’re tired of guessing which shoulder screw goes where, or you’ve got a mower sitting with a missing cotter pin (714-0104) and need the exact size, this manual is your ticket. Stop wasting time with aftermarket junk. Cub Cadet 21121C29025 Parts Catalog – 73 Pages of Factory Specs”>Cub Cadet 21121C29025 Parts Catalog – 73 Pages of Factory Specs covers a different model, but for the RZT42, this is the one. Automotive Industry Overview”>Learn more about how OEM documentation is sourced – then Access the Factory Manual and get the right part the first time.

Related Technical Resources & Manuals

• Automotive Industry Overview