Toro Z Master 4000 Parts: Blades, Deck Belts, Filters & Most-Replaced Parts

The Toro Z Master 4000 Series (models like 74004, 74022, 74024, 74054 and 74055) is one of the most popular commercial zero-turns on the road. Our records show more than 430 parts installed on Z Master 4000 repairs. Here are the blades, belts and filters by deck size — straight from Toro's parts lists — and the wear parts we replace most.

Quick reference

Toro Z Master 4000 blades by deck size

• 52" deck (74050, 74052): 140-1242 high-flow 18" blade $33.51, 3 per deck.
• 60" deck (74004, 74054, 74055 and others): 140-1240 20.5" high-flow blade $21.71, 3 per deck. This is one of the most-searched Z Master parts for a reason — it's the 60" blade on most 4000s.
• 72" deck (74022, 74024 HDX Pro XL): 140-1238 24.5" blade $37.24, 3 per deck.

Always replace blades as a set and check the spindle and blade drive sheave (138-6060) $36.92 while the deck is up — the sheave is one of the top replacement parts on 4000 decks from our service department's repair records.

Deck belts and pump belts

Z Master 4000 deck belts vary by deck width and year. The 72" MyRIDE (74024) uses 145-1940 $247.14. Many 52" and 60" models use the 140-7994 hydro pump drive belt $70.90 for the traction drive. Because 4000 deck belts changed across serial ranges, look up your exact model and serial in Parts for My Machine before ordering.

Most-replaced wear parts on the Z Master 4000

From our service department's repair records, the parts that wear out most on 4000 Series machines are:

• Flat idler pulley 132-9424 $43.45 — the #1 drivetrain wear part on these mowers.
• Idler pivot bushing 139-6690 $14.58 — a worn pivot lets the belt slip and throws belts.
• Blade drive sheave 138-6060 $36.92.
• Front caster wheel assembly with bearings $363.53.
• Suspension rubber bushings $7.71 on suspension-seat models.
• Hypr-Oil 500 $86.92 and the Rotary 16018 transmission filter kit $13.38 for hydro service.

Engine filters on the Z Master 4000

Most 4000s run Kawasaki FX-series engines (852cc and 999cc). Toro's parts lists show air filter elements 119-5944/119-5945, fuel filter 142-6949 and Kawasaki oil filter KW10761 on several models. For Kawasaki's own numbers and the plug, see our FX850V maintenance guide. For oil filters, the Rotary 12864 $14.80 Kawasaki replacement is the one we install most on 4000s.

End-of-season checklist for a Z Master 4000

1. Blades sharpened or replaced (as a set); check spindles for play.
2. Inspect deck and pump belts, idlers and idler pivots.
3. Engine oil, oil filter, air elements, fuel filter, plugs.
4. Hydro fluid and filter per the manual's hours.
5. Grease caster and spindle fittings; check caster wheel bearings.

Which Z Master 4000 do I have?

Look for the model number on the frame tag under the seat. 740xx numbers cover several generations and engines (852cc, 999cc) and deck sizes (52", 60", 72"). The model plus serial number is what decides belts, blades and filters.

Parts in this guide

Blade 20.50 High Flow 140-1240$21.71Blade 24.50 High Flow 140-1238$37.24Blade-flow, High 18.00 140-1242$33.51Belt-v 140-7994$70.90Pulley-idler, Flat (1P) 132-9424$43.45Bushing, Idler Pivot (1P) 139-6690$14.58Sheave-drive, Blade (3BT) 138-6060$36.92Hypr-oil 500 (gallon) (7JC) 114-4714$86.92

FAQ

What blade does a Toro Z Master 4000 60" use?

Most 60" Z Master 4000 models use the Toro 140-1240 20.5" high-flow blade, three per deck.

What blade fits the Z Master 4000 72"?

The 72" HDX Pro XL models (74022, 74024) use 24.5" blades such as Toro 140-1238.

What wears out most on a Toro Z Master 4000?

In our repair records: flat idler pulleys, idler pivot bushings, blade drive sheaves, caster wheel bearings and hydro filters.

Related guides

• Toro TimeCutter Parts by Deck Size: 42", 50" & 54" Blades, Belts and Filters
• Toro Titan & Titan MAX Parts: 54" and 60" Blades, Belts and Filters
• Toro Z Master 3000, 5000, 6000 & 7000 Parts: Blades, Deck Belts & Hydro Filters
• Toro Mower Blade Cross Reference Chart (OEM to Rotary & Oregon)
• Toro Mower Belt Cross Reference Chart (Deck & Drive Belts)
• Toro Hypr-Oil 500: Sizes, Part Numbers & the Hydro Filters to Change With It

Repair statistics in this guide are aggregated from our service department's repair records. Part numbers come from manufacturer parts lists; always confirm fitment with your model and serial number.