Gravely PTO Clutch Replacement Guide

Gravely PTO clutch replacement guide for ZT, Pro-Turn, and Pro-Stance mowers with OEM number, bore size, pulley diameter, and fitment check icons.

Gravely zero-turn mowers, stand-on mowers, commercial walk-behinds, lawn tractors, and compact commercial platforms use electric PTO clutches to engage the mower deck and drive the blades. When the clutch slips, overheats, clicks without driving the belt, or fails to engage, cutting performance can drop quickly.

This guide helps you find the correct Gravely PTO clutch replacement by mower series, OEM part number, bore size, pulley diameter, rotation, connector plug, and deck setup. The most reliable way to confirm fitment is to match the part number stamped, engraved, printed, or labeled on your original clutch.

Need help confirming the correct PTO clutch?
Email support@ptodirectusa.com with your mower model number, serial number, OEM clutch number, and clear photos of the old clutch, wiring connector, pulley, and deck belt routing.

How to Find the Right Gravely PTO Clutch

Start with the OEM number on your original clutch. Gravely mower platforms can vary by series, deck size, engine setup, production year, pulley offset, bore size, connector style, and anti-rotation bracket position.

Before ordering, confirm the main fitment details:

  • OEM clutch number: Match the number from the original clutch whenever possible.
  • Mower model and serial number: Gravely model families can vary by year and deck configuration.
  • Crankshaft bore: Common sizes include 1 inch and 1-1/8 inch, depending on the clutch family.
  • Pulley diameter: Small differences can affect belt speed, belt tracking, and blade performance.
  • Rotation: Confirm the correct rotation direction from the pulley side.
  • Connector plug: Compare plug style, wire length, and connector condition.

Important fitment note: Gravely PTO clutch fitment can change by model year, serial number, deck size, and machine configuration. If the original clutch part number is missing or unreadable, verify the lead product page specs before ordering, including crankshaft bore, pulley diameter, rotation, and connector plug.

Not sure where to find the number? Use the PTO clutch fitment guide before ordering.

Common Gravely PTO Clutch Symptoms

A failing PTO clutch can look like an electrical issue, belt problem, or deck drive problem. Diagnose the full system before replacing parts.

  • Mower blades will not engage
  • PTO clutch clicks but blades do not spin
  • Deck belt does not move when the PTO switch is activated
  • Blades engage, then slow down in thick grass
  • PTO clutch gets hot or smells burnt
  • Blade engagement works cold but fails hot
  • Clutch engages intermittently
  • Grinding, bearing noise, or pulley wobble near the clutch
  • Blown fuse or electrical issue when the PTO is activated

An old or worn PTO clutch coil can sometimes work when cold, then weaken as the mower heats up. If the blades engage at first but start slipping, slowing down, or cutting inconsistently after 10 to 30 minutes, inspect the clutch, belt routing, idlers, spindle bearings, and electrical voltage.

If your Gravely blades will not engage at all, start with the PTO clutch won’t engage troubleshooting guide. If the clutch clicks but the blades do not spin, use the PTO clutch clicks but blades won’t spin guide. If the blades slow down in thick grass, read the PTO clutch slipping under load guide. If the clutch gets hot or smells burnt, use the PTO clutch getting hot or smells burnt guide.

Gravely PTO Clutch Replacement by Mower Series

Gravely used several PTO clutch families across ZT, ZT HD, ZT XL, ZTX, Pro-Turn, Pro-Turn ZX, Pro-Stance, Pro-Walk, Compact-Pro, Pro-Master, PM Series, and older lawn tractor platforms. Use the mower series below as a starting point, then confirm by OEM number and specs.

Gravely ZT, ZT XL, and ZTX

Gravely ZT, ZT XL, and ZTX models commonly use residential and light commercial PTO clutch families. Many shoppers working on these platforms start with the 4678300 PTO clutch, but fitment should still be confirmed by the original clutch number, deck size, and mower model.

  • Common platforms: ZT, ZT XL, ZTX
  • Common starting-point clutch: 4678300 PTO clutch
  • Best confirmation method: match the OEM number on the original clutch

For model-level routing, see the Gravely ZT Series PTO clutch replacement guide.

Gravely ZT HD and Pro-Turn Z

Gravely ZT HD and Pro-Turn Z models may use heavier-duty clutch configurations than smaller residential platforms. Some applications are associated with the 59118500 PTO clutch, but the correct replacement depends on the original clutch number, deck setup, engine, and production range.

  • Common platforms: ZT HD, Pro-Turn Z
  • Common clutch family to check: 59118500 PTO clutch
  • Best confirmation method: match the original clutch number and core specs

Gravely Pro-Turn ZX

Gravely Pro-Turn ZX applications may use larger commercial clutch configurations. One common replacement path is the 59118600 PTO clutch, which is often associated with higher-torque applications and 1-1/8 inch crankshaft compatibility.

  • Common platform: Pro-Turn ZX
  • Common clutch family to check: 59118600 PTO clutch
  • Best confirmation method: confirm the original clutch number and crankshaft bore

Gravely Pro-Stance, Pro-Walk, Compact-Pro, and Pro-Master

Gravely Pro-Stance, Pro-Walk, Compact-Pro, and Pro-Master machines are commercial platforms where exact clutch fitment matters. Some applications are associated with the 03789900 PTO clutch, while older Pro-Master, Pro Series, and related machines may use the dedicated 00191700 PTO clutch replacement path.

Gravely PM Series and Related Platforms

Some Gravely PM Series and related platforms are associated with the 09266700 PTO clutch. This clutch may also cross-reference with numbers such as 09232700, 00389900, and 09208000 depending on the application.

  • Common platform: PM Series and related Gravely applications
  • Common clutch family to check: 09266700 PTO clutch
  • Best confirmation method: confirm original clutch number and deck setup before ordering

Older Gravely Lawn Tractor Platforms

Older Gravely lawn tractors may use legacy PTO clutch families such as B1XT0720. These should be confirmed by original clutch number and machine details before ordering.

Popular Gravely PTO Clutch Part Numbers

These are common Gravely and Ariens-family PTO clutch replacements available through PTO Direct USA. Use this list as a starting point, then verify your original clutch number and specs.

Many Gravely models share PTO clutch configurations with Ariens platforms, especially across zero-turn and commercial crossover units. Always confirm using the OEM number stamped on the original clutch when possible.

00191700 and Warner 5219-45 Gravely PTO Clutch Family

Some older Gravely ZT, Pro-Master, Pro Series, and related Ariens-built platforms use the 00191700 / 191700 PTO clutch path, which cross-references with Warner 5219-45. This path is handled by the dedicated 00191700 PTO clutch replacement.

  • Common Ariens / Gravely number: 00191700
  • Related number: 191700
  • Warner cross-reference: 5219-45
  • Common Gravely platforms: select ZT, Pro-Master, Pro Series, and related applications
  • Lead product path: 00191700 PTO clutch replacement

Cross-reference warning: Do not treat this as the same as the Toro / Exmark 110-6766 PTO clutch path unless your original clutch number and lead product page specs confirm the match.

For the full 00191700 model and cross-reference path, read the Ariens Gravely 00191700 PTO clutch replacement guide.

Do Not Guess by Gravely Series Alone

Gravely PTO clutches can look similar while using different pulley diameters, pulley offsets, bore sizes, wiring connectors, torque ratings, or rotation directions. A clutch that physically bolts onto the crankshaft may still be wrong for the belt drive system.

Common fitment trap: ZT, ZT HD, Pro-Turn, Pro-Stance, Pro-Walk, Compact-Pro, and Pro-Master model names do not automatically identify the correct clutch. Deck size, engine setup, year, and original clutch number can change the replacement path.

When in doubt, match the OEM number first. If the number is missing, compare the lead product specs, especially crankshaft bore, pulley diameter, rotation, and connector plug.

Before Replacing a Gravely PTO Clutch

Before installing a new Gravely PTO clutch, inspect the mower for problems that may have caused the original clutch to fail or mimic clutch failure.

  • Check deck belt condition and routing
  • Inspect idler pulleys and blade spindles for drag or wobble
  • Inspect the wiring connector for melting, corrosion, or loose terminals
  • Check battery voltage and charging system condition
  • Inspect the crankshaft for rust, burrs, or keyway damage
  • Confirm the anti-rotation bracket is installed correctly
  • Confirm pulley alignment with the deck belt path

Review the PTO clutch installation guide before installing the replacement. If the old clutch will not slide off the crankshaft, see the PTO clutch stuck on crankshaft guide before forcing removal.

Shop Gravely PTO Clutches

Browse the Gravely PTO clutch collection to compare available replacement clutches by part number, specs, and mower application. If you are not sure which clutch fits, use the PTO clutch fitment guide or email support@ptodirectusa.com with clear photos of your original clutch.

You can also browse the full electric PTO clutch catalog for other mower brands and cross-reference numbers.

Related Gravely and Ariens Guides

Helpful PTO Clutch Resources

FAQ

How do I know which PTO clutch fits my Gravely?

The best way is to match the OEM part number stamped, engraved, printed, or labeled on your original clutch. If the number is missing or unreadable, compare the lead product page specs, including crankshaft bore, pulley diameter, rotation, and connector plug.

What are common Gravely PTO clutch part numbers?

Common Gravely PTO clutch numbers include 4678300, 52711900, 09266700, 59118500, 59118600, 03789900, B1XT0720, 00191700, 191700, and related Warner-style numbers. Always confirm the original clutch number before ordering when possible.

Does 00191700 fit Gravely mowers?

Selected Gravely ZT, Pro-Master, Pro Series, and related Ariens-built applications use the 00191700 / 191700 PTO clutch path, commonly cross-referenced with Warner 5219-45. Confirm your original clutch number when possible, or verify the lead product page specs before ordering.

Does 110-6766 fit Gravely mowers?

The 110-6766 PTO clutch is primarily handled as a separate Toro / Exmark-style replacement path on PTO Direct USA. Do not use 110-6766 for Ariens / Gravely 00191700 applications unless your original clutch number and lead product page specs confirm the match.

Are Ariens and Gravely PTO clutches sometimes the same?

Yes. Some Ariens and Gravely mower platforms share PTO clutch families, especially across Zoom, Zoom XL, Pro-Master, Pro-Turn, ZT, and related commercial crossover applications. Always confirm by original clutch number when possible.

Why will my Gravely blades not engage?

Blade engagement problems can be caused by a failed PTO clutch, weak battery, PTO switch issue, safety switch interruption, damaged wiring, broken deck belt, seized spindle, dragging idler pulley, or incorrect belt routing.

Can a deck belt problem look like a bad PTO clutch?

Yes. A loose, glazed, stretched, broken, or misrouted deck belt can make it look like the PTO clutch is failing. Inspect the belt, idlers, spindles, and pulley alignment before replacing the clutch.

Can PTO Direct USA help me find the right Gravely PTO clutch?

Yes. Email support@ptodirectusa.com with your mower model number, serial number, OEM clutch number, and clear photos of the old clutch. For the best fitment help, include photos of the clutch label or stamped number, wiring connector, clutch pulley, deck belt routing, and any visible Warner or Ogura numbers on the clutch body.