Gravely ZT PTO Clutch Replacement Guide

If you already know your part number, browse our Gravely PTO clutch collection to find a direct replacement for your mower.

If your Gravely ZT blades are not engaging, slipping under load, or cutting inconsistently, a worn PTO clutch is one of the most common causes. These zero-turn mowers rely on consistent clutch engagement to drive the mower deck and maintain cutting performance.

This guide explains common PTO clutch symptoms, where the clutch is located, and how to identify the correct replacement for Gravely ZT mower applications.

Gravely ZT PTO Clutch Replacement

The PTO clutch on Gravely ZT models mounts directly to the engine crankshaft and engages the mower deck belt system when the PTO switch is activated. As the clutch wears, blade engagement may become inconsistent, weak, or fail completely.

Some Gravely ZT applications use OEM part number 00191700, also listed as 191700. This clutch family commonly cross-references to Warner 5219-45, Xtreme X0005, Stens 255-825X, and Oregon 33-130.

If your original clutch is marked 00191700, 191700, or Warner 5219-45, compare it to the 00191700 PTO clutch replacement.

For broader Gravely coverage, see our Gravely PTO clutch replacement guide. For full 00191700 model and fitment details, see our 00191700 PTO clutch fitment guide.

Common Gravely ZT Models

The 00191700 PTO clutch family is commonly associated with select Gravely ZT models, but Gravely used multiple clutch families across the ZT lineup. Always verify the OEM number stamped on your original clutch before ordering.

Gravely ZT 40-Inch Deck References

  • ZT 1540
  • ZT 1640
  • ZT 1740
  • ZT 1840

Gravely ZT 44-Inch Deck References

  • ZT 1944
  • ZT 2044

Gravely ZT 48-Inch Deck References

  • ZT 2148
  • ZT 2348

Gravely ZT 52-Inch Deck References

  • ZT 2352
  • ZT 2552

Model name alone is not enough to confirm fitment. Product code, serial range, engine package, deck size, and original clutch number can all affect which PTO clutch your mower uses.

Gravely ZT 2352 PTO Clutch Replacement

The Gravely ZT 2352 appears in the 00191700 clutch family on select configurations. If the blades are not engaging, the clutch clicks but the deck belt does not move, or cutting power drops under load, the PTO clutch should be inspected.

If your original clutch is marked 00191700, 191700, or Warner 5219-45, use the 00191700 PTO clutch replacement as your first comparison.

Gravely ZT 2552 PTO Clutch Replacement

The Gravely ZT 2552 also appears in the 00191700 fitment group across select configurations. PTO clutch wear on this model often results in intermittent engagement, reduced cutting performance, excessive heat, or blade slowdown in heavy grass.

Matching the OEM part number stamped on your original clutch is the most reliable way to confirm compatibility before ordering a replacement.

00191700 PTO Clutch Specs for Gravely ZT

The 00191700 clutch family is generally associated with the following core specifications:

  • OEM Number: 00191700, 191700
  • Warner Cross-Reference: 5219-45
  • Crankshaft Bore: 1"
  • Pulley Diameter: 6.00"
  • Rotation: CCW from pulley side
  • Voltage: 12V DC
  • Torque Rating: 125 ft-lbs
  • Belt Width Compatibility: 1/2" or 5/8" A/B belt profile

Specs should always be compared against the original PTO clutch before installation, especially on older Gravely ZT machines where similar model names can use different clutch families.

Common Signs of a Failing PTO Clutch on Gravely ZT Models

  • Blades will not engage when the PTO switch is activated
  • PTO clutch clicks but the deck belt does not move
  • Intermittent blade operation during mowing
  • Burning smell or overheating near the clutch
  • Squealing or grinding noise from worn bearings
  • Blades slow down or stop under load in thicker grass
  • Visible wear, discoloration, or heat damage on the clutch housing

If these symptoms appear, the PTO clutch may be worn or failing, but the deck belt, idler pulleys, blade spindles, wiring connector, PTO switch, battery voltage, and charging system should also be inspected.

Where Is the PTO Clutch on a Gravely ZT?

The PTO clutch is mounted beneath the engine crankshaft and sits above the mower deck belt system. It engages the blades when the PTO switch is activated.

Inspection typically requires access to the underside of the mower. Removing the deck or lifting the mower safely provides better access for diagnosis and replacement.

How to Identify the Correct Replacement PTO Clutch

The most accurate way to confirm the correct replacement is to match the OEM part number stamped, labeled, or engraved on your original PTO clutch.

If your Gravely ZT clutch is marked 00191700, 191700, or Warner 5219-45, use the 00191700 PTO clutch replacement as your first comparison.

If the original clutch number is unreadable, confirm fitment using your mower model, product code, serial number, deck size, engine package, pulley diameter, crankshaft bore, rotation, wiring connector, and anti-rotation bracket setup.

  • Match the OEM clutch number whenever possible
  • Confirm the crankshaft bore is 1"
  • Measure the pulley diameter
  • Confirm CCW or CW rotation
  • Compare the wiring connector or lead style
  • Check the anti-rotation bracket or stop location
  • Confirm the mower model, product code, serial number, engine setup, and deck size

Important Fitment Note

The 00191700 clutch family is its own Ariens / Gravely / EverRide PTO clutch group and commonly cross-references to Warner 5219-45. It is not superseded by, replaced by, or the same listing as Toro / Exmark 110-6766.

Only use a different PTO clutch family if your original OEM number, pulley diameter, crankshaft bore, rotation, wiring connector, and anti-rotation setup all match that application.

Related Gravely PTO Clutch Guides

Find the Right PTO Clutch for Gravely ZT

If your Gravely ZT blades are not engaging correctly, confirming the OEM part number on your original clutch is the most important step before selecting a replacement.

If your original clutch matches 00191700, 191700, or Warner 5219-45, shop the 00191700 PTO clutch replacement.

You can also browse the full Gravely PTO clutch collection or contact us for fitment assistance.

Fitment note: PTO Direct USA sells aftermarket replacement parts and is not affiliated with or endorsed by AriensCo, Gravely, Warner Electric, or any original equipment manufacturer. Brand names, model names, and OEM numbers are used for fitment identification only.