| Brand Name | SeaSummer | SKU | 0588-Gr-0017 |
| ID | 1" | Pulley | 6.000" |
| Rotation | CCW | Belt | A/B Belt |
| Bolt Torque | 110 ft. lbs. | Maximum Engine RPM | 3,600 RPM |
| Voltage Insulation | 1000V | Temperature | Up to 370°F (188°C) |
| Net Weight | 5kg | Carton Dimensions | 68 x 46 x 26 cm |
| MOQ | 100pcs | Customized Services | OEM |
| Delivery Time | 30 days, volume-dependent | Packaging | Cardboard packaging |
Products Description

Lawn Mower Tractor PTO Clutch Gravely 991084 - ZT 52HD (010000 - 019999), (030000 & Above)
Many Gravely compact zero‑turn mowers feature compact engine compartment layout. Limited inner space slows heat dissipation, making original‑spec clutches prone to heat accumulation after hours of continuous mowing. This replacement unit takes such cramped cabin conditions into account during structural optimization. It adopts 1‑inch shaft bore, 6.000‑inch pulley supporting both A‑type and B‑type belts, delivering 110 ft‑lbs rated torque under maximum 3600 RPM engine speed.
Every mounting footprint, shaft interface and electrical connector strictly follows OEM drawing benchmarks. No destructive trimming or custom‑fit shims are required during field swap. It is worth noting that this clutch only serves designated serial‑number batches of ZT‑52HD; operators need to double‑check machine serial tag besides part number confirmation. Each production batch completes heat‑stress simulation testing replicating poor‑ventilation cabin environment. The component supports DIY owner repairs, local service shop overhauls and bulk stocking for regional parts distributors across North America.
Vehicle Compatibility
Applications
| Ariens | 915131 |
| Ariens | 915141 |
| Ariens | 915143 |
| Ariens | 915151 |
| Ariens | 915155 |
| Ariens | 915157 |
| Ariens | 915159 |
| Ariens | 915161 |
| Ariens | 915169 |
| Ariens | 915171 |
| Ariens | 915322 |
| Ariens | 915323 |
| Ariens | 991085 |
| Ariens | 991086 |
| Ariens | 991087 |
Replacement Numbers
| Ariens | 04387900 |
| Ariens | 4387900 |
| Ariens | 21546552 |
| Ariens | 532414336 |
| AYP | 179334 |
| AYP | 400008 |
| AYP | 414336 |
| AYP | 414717 |
| AYP | 53464900 |
| AYP | 532179334 |
| AYP | 532400008 |
| AYP | 532414336 |
| AYP | 532414717 |
| AYP | 917179334 |
| AYP | 917532179334 |
Products Advantages
Why Choose Our Electric PTO Clutch over Generic Replacements?
Our Solution:

Optimized Thermal Performance For Compact Zero‑Turn Cabin Environment
Optimized Thermal Performance For Compact Zero‑Turn Cabin Environment Gravely ZT‑52HD and related platforms have cramped engine bays with restricted air circulation. Our clutch adjusts internal coil encapsulation formula to improve passive heat dissipation performance. Even under long‑hour operation in poorly‑ventilated cabin space, it slows thermal accumulation, lowering risk of coil overheating which frequently troubles budget alternatives on compact zero‑turn machines. Reinforced sealing structure resists ultra‑fine grass dust generated in heavy‑debris mowing sites.
Dual A/B Belt Compatibility Reduces On‑Site Belt‑Matching Trouble
Dual A/B Belt Compatibility Reduces On‑Site Belt‑Matching Trouble The 6‑inch pulley is precision‑machined to fit both A‑section and B‑section belts. In real‑world repair scenarios, service technicians often encounter mixed belt configurations on Gravely/Ariens second‑hand fleets. This dual‑spec design removes the hassle of hunting for exact belt type during urgent field service. All key dimensions including 1‑inch bore and CCW rotation comply with OEM specifications for direct bolt‑on installation.


Serial‑Number‑Aware Cross‑Platform Compatibility Simplify Parts Stock
This single SKU fits specified serial‑code batches of Gravely ZT‑52HD plus a series of Gravely and Ariens zero‑turn variants. Parts dealers should remind end‑users to verify machine serial number besides OEM part number to avoid wrong‑part returns. Thanks to broad model coverage, wholesalers can cut down overall SKU count while meeting service demands for multiple zero‑turn fleets. No re‑drilling or surface grinding needed during replacement.
Dual‑Mode Procurement Supports Repair‑Shop & Seasonal Wholesale Demand
Turf equipment parts sales fluctuate sharply along local mowing cycles. We maintain cyclic production scheduling and dedicated safety stock for this 991084 clutch SKU. Each finished unit passes multi‑dimensional functional assessment before leaving factory. Our supply system handles large‑volume seasonal bulk orders as well as small emergency restock for independent repair stores. OEM branding solutions open to buyers reaching minimum‑order thresholds.

Quality and Craftsmanship Details


Products Package

About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
Trusted Partnership Power
YOUR PROFESSIONAL ONE-STOP SOURCE
FOR 10000+ OUALITY PARTS
Verified Factory Excellence
BACKED BY 200+ TRUSTED FACTORY PARTNERS
Production process








Quality control




Expo experience

Customer Reviews

FAQ
Q: How do I confirm this clutch works for my Gravely zero‑turn mower?
A:This aftermarket unit corresponds to OEM part number 991084. It fits Gravely ZT‑52HD within serial‑number scope 010000‑019999 and 030000 & above, alongside selected Gravely and Ariens zero‑turn models. Key specs: 1‑inch bore, CCW rotation, 6.000‑inch pulley supporting A/B belts. Besides original part number, you must check your machine serial tag before purchase. Send us machine info and serial number and our technical staff will double‑check fitment.
Q: What improvements suit compact zero‑turn mower narrow‑cabin conditions?
A: We optimized coil encapsulation formula to improve passive heat dissipation for poorly‑ventilated mower compartments. Multi‑lip bearing seals defend against fine grass dust common on lawn sites. The pulley supports both A‑belt and B‑belt for flexible field service. The coil can withstand working temperature up to 366°F (186°C) with max engine speed up to 3600 RPM.
Q: Do I need extra modification during installation?
A:No extra alteration work is required. This clutch replicates original mounting hole layout, rotational direction and electrical connector specs for 991084. General installation workflow: remove old assembly, position new unit and reconnect wiring terminals; no drilling, grinding or self‑made spacers are necessary.
Q: What maintenance points deserve extra attention for compact zero‑turn fitment?
A: Frequently clear grass clippings building up around clutch housing, debris accumulation will worsen already‑limited cabin heat dissipation. Inspect wiring connector for corrosion. Keep pulley grooves clean to preserve A/B‑belt gripping performance. Routine cleaning will mitigate heat‑related failure risks for compact zero‑turn platforms.
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