John Deere Z320M : Parts, Manuals, Diagrams, Specs

John Deere Z320M

The John Deere Z320M is a zero-turn mower designed for residential use, suitable for mowing areas up to 2 acres. It features a powerful 14.9 kW (20 HP) V-twin cylinder OHV engine, providing reliable performance and increased mowing speeds compared to some other models.

The Z320M comes equipped with a 107 cm (42-inch) Accel Deep mower deck, which offers excellent cutting performance. The deck can be easily converted for mulching or collecting with optional kits. A convenient foot-operated deck lift allows for easy adjustment of cutting height, ranging from 31.75 mm to 114.3 mm.

This mower is known for its maneuverability and ease of use, thanks to its zero-turn capability and intuitive twin levers for speed and direction control. It can reach forward speeds of up to 11.3 km/h (7 mph), making it efficient for larger lawns.

Comfort features include a premium high-back seat with optional armrests, which is particularly appreciated during longer mowing sessions. The Z320M also comes with a standard rear hitch for added versatility.

The mower’s dimensions are approximately 197.6 cm x 128 cm x 110 cm (L x W x H), and it weighs around 255-257 kg. It uses a hydrostatic transmission system and features 11×6-5 front caster tires and 18×8.5-8 drive tires.

John Deere offers a 2-year warranty for domestic use on both the machine and engine, which can be extended to 3 years if serviced by an authorized John Deere dealership. Some retailers may offer different warranty terms, such as a 3-year or 200-hour bumper-to-bumper warranty.

The Z320M is part of John Deere’s Z300 series of ZTrak mowers, positioned as an entry-level model with additional comfort features compared to the Z315E. It’s designed to deliver a balance of performance, comfort, and efficiency for homeowners with larger lawns or small acreages.

John Deere Z320M Parts

The John Deere Z320M zero-turn mower is available as a new model for the 2025 year. While specific pricing for the USA market is not directly provided, we can infer some information based on similar models and the available data:

• New 2025 John Deere Z320M models are currently being offered by dealers.

• The price for a new Z320M is likely to be in the range of $3,500 to $4,500, based on pricing of similar models in the John Deere lineup.

Used John Deere Z320M Prices

For used John Deere Z320M mowers, we have more specific information:

• A used 2024 John Deere Z320M with 3 hours of use is priced at $3,469.00.

It’s important to note that prices for both new and used models can vary depending on factors such as location, dealer promotions, optional features, and overall condition of used units.

Price Comparison

To put the Z320M pricing in context:

• The Z320M is generally priced lower than larger models like the Z530R, which has new models priced around $5,990.00 and used models ranging from $5,290.00 to $5,990.00 depending on hours of use.

• It is priced higher than entry-level residential mowers but lower than commercial-grade zero-turn mowers in the John Deere lineup.

When considering a purchase, potential buyers should compare features, warranty options, and local dealer support in addition to price. The Z320M offers a balance of performance and affordability for homeowners with larger lawns or small acreages.

John Deere Z320M Specs

Engine

• Model: Kawasaki FR651V

• Type: V-twin cylinder OHV

• Power: 14.9 kW (20 HP)

• Displacement: 726 cc

• Fuel tank capacity: 11.4 L (3.0 U.S. gal.)

Mower Deck

• Type: Accel Deep™ mower deck

• Width: 107 cm (42 inches)

• Material: 12-gauge steel (2.7 mm thick)

• Cutting height range: 3-11 cm (1.25-4.5 inches)

• Cutting height increments: 0.64 cm (0.25 inches)

Transmission

• Type: Hydrostatic (Hydro-Gear EZT-C)

• Forward speed: 0-11.3 km/h (0-7 mph)

• Reverse speed: 0-5.6 km/h (0-3.5 mph)

Dimensions

• Length: 197.6 cm

• Width: 128 cm

• Height: 110 cm

• Weight: 255-257 kg

Tires

• Front caster: 11×6-5

• Drive: 18×8.5-8

Comfort Features

• Seat: High-back with optional armrests

• Seat back height: 51 cm (20 inches)

• Control: Twin levers for speed and direction

Additional Features

• Foot-operated deck lift

• Electric PTO

• Hour meter

• Cup holder

Warranty

• Machine: 2 years (domestic use)

• Engine: 2 years (domestic use)

John Deere Z320M Reviews

Overall Impression

The John Deere Z320M zero-turn mower has received generally positive reviews from users. Many appreciate its performance, comfort features, and ease of use, making it a popular choice for residential lawns up to 2 acres.

Performance

Users praise the Z320M’s cutting performance, noting that it handles various grass conditions well. The 42-inch Accel Deep mower deck is commended for its excellent cut quality and the ability to easily convert to mulching or bagging with optional kits. The 14.9 kW (20 HP) V-twin cylinder OHV engine provides ample power for most mowing tasks.

Maneuverability

Reviewers consistently highlight the Z320M’s excellent maneuverability. The zero-turn capability allows for easy navigation around obstacles like trees, flowerbeds, and garden furniture. Users find it particularly useful for lawns with tight spaces or numerous obstacles.

Comfort

The comfort features of the Z320M receive high marks from users. The high-back seat with optional armrests is appreciated, especially during longer mowing sessions. The roomy operator’s platform provides ample legroom and good visibility of the cutting deck.

Ease of Use

Many users find the Z320M easy to operate, even for those new to zero-turn mowers. The intuitive twin levers for speed and direction control are frequently mentioned as user-friendly. The foot-operated deck lift for easy cutting height adjustment is also a popular feature.

Build Quality

While opinions on build quality vary, many users find the Z320M to be well-constructed. Some appreciate that all bearings are greasable, which contributes to easier maintenance and potentially longer life of the mower.

Areas for Improvement

A few users mention that there are still some areas where a push mower or weed eater is needed, as the Z320M can’t reach every spot. Some reviewers suggest purchasing from a local dealer rather than a big box store for better support and potentially higher quality.

Conclusion

Overall, the John Deere Z320M receives positive reviews for its performance, comfort, and ease of use. It appears to be a solid choice for homeowners with larger lawns who want an efficient and comfortable mowing experience.

Benefits of Hydrostatic Transmission

The John Deere Z320M’s hydrostatic transmission offers several benefits for users:

Improved ease of use: The hydrostatic transmission allows operators to control the direction and speed of the mower using only pedals, eliminating the need for manual gear shifting. This enables the operator to focus more on steering and maneuvering.

Smooth and precise control: The transmission provides infinitely variable speed control, allowing for smooth acceleration and deceleration without the jerky motion associated with gear-based transmissions.

Enhanced operator comfort: The smooth operation and lack of gear shifting reduce operator fatigue, especially during longer mowing sessions.

Increased durability: The smoother operation of the hydrostatic transmission can lead to increased durability of the mower components over time.

Efficient low-speed operations: Hydrostatic transmissions are particularly effective for tasks that require precise speed control, such as mowing around obstacles or in tight spaces.

Reduced maintenance: Compared to some other transmission types, hydrostatic transmissions generally require less maintenance. The Z320M features maintenance-free unitized transmissions that are sealed and have no hose connections to leak hydraulic fluid.

Improved maneuverability: The hydrostatic transmission, combined with the zero-turn capability, allows for excellent maneuverability around obstacles like trees, flowerbeds, and garden furniture.

These benefits contribute to the Z320M’s overall performance and user-friendly design, making it an efficient and comfortable choice for residential mowing tasks.

John Deere Z320M Accessories

Bagging and Collection Systems

• Material Collection System (MCS)

• 6.5-bushel and 7-bushel baggers

Mulching Accessories

• MulchControl Kit

Lighting Options

• LED Light Kits for improved visibility

Comfort Enhancements

• Floor Mat for anti-slip and vibration reduction

• High-back seat with optional armrests

• Footrest Extensions for added operator comfort

Lawn Care Tools

• Grass Groomer – Lawn Striping Kit for creating professional-looking patterns

Protective Attachments

• Rear Bumper for added protection against impacts

Towing Accessories

• Hitch Kit for towing carts, sprayers, or other attachments

Utility Attachments

• Utility Cart (available in 7 and 10 cubic foot sizes)

• Lawn Sweeper with a 17-bushel capacity

Deck Enhancements

• Deck Front Roller Kit to prevent lawn scalping

Convenience Features

• Foot Lift Kit for quick deck height adjustments

These accessories enhance the functionality, comfort, and versatility of the John Deere Z320M, making it suitable for a variety of lawn care tasks.

John Deere Z320M v Z320r

Engine and Power

Both the John Deere Z320M and Z320R feature a 21.5 HP V-Twin engine, providing ample power for residential mowing tasks.

Mower Deck

Both models come equipped with a 42-inch Accel Deep™ mower deck with optional MulchControl™, offering excellent cutting performance and versatility.

Comfort Features

The Z320M and Z320R both have a 20-inch high-back seat for improved comfort during longer mowing sessions. However, the Z320R includes armrests as a standard feature, while they are optional on the Z320M.

Additional Features

The Z320R comes with several standard features that are optional or not available on the Z320M:

• LED lights for improved visibility

• Floor mat for reduced vibration and improved comfort

• Front bumper for added protection

• Covered storage for convenience

Standard Equipment

Both models come with a standard rear hitch, allowing for the attachment of various accessories.

Trim Level

The Z320R is part of the R Series, which represents the highest trim level in the Z300 lineup, offering more comfort and convenience features as standard. The Z320M is part of the M Series, which sits between the entry-level E Series and the top-tier R Series.

Price Point

While specific pricing is unknown, the Z320R is likely to be priced higher than the Z320M due to its additional standard features and higher trim level.

Target User

The Z320M is ideal for homeowners who want a balance of performance and value, while the Z320R is suited for those who prioritize maximum comfort and convenience features in their mowing experience.

Main Differences

The main differences between the John Deere Z320M and Z320R zero-turn mowers are:

Standard Features:
The Z320R comes with several premium features as standard that are optional or not available on the Z320M:

• Armrests on the seat

• Covered tool tray

• LED lights for improved visibility

• Rubber floor mat for reduced vibration and improved comfort

Comfort:
While both models have a 20-inch high-back seat, the Z320R offers more comfort features as standard.

Trim Level:
The Z320R is part of the R Series, which represents the highest trim level in the Z300 lineup, offering more comfort and convenience features. The Z320M is in the M Series, which sits between the entry-level E Series and the top-tier R Series.

Price:
The Z320R is likely to be priced higher than the Z320M due to its additional standard features and higher trim level.

Engine:
Both models feature a similar 21.5 HP V-Twin engine, providing comparable power for residential mowing tasks.

Mower Deck:
Both come equipped with a 42-inch Accel Deep™ mower deck with optional MulchControl™.

Target User:
The Z320M is ideal for homeowners wanting a balance of performance and value, while the Z320R is suited for those prioritizing maximum comfort and convenience in their mowing experience.

John Deere Z320M Blades

Blade Specifications

The John Deere Z320M zero-turn mower uses 42-inch mower blades for its Accel Deep mower deck. The standard blades have the following specifications:

• Length: 21-3/8 inches

• Width: 3 inches

• Thickness: 0.158 inches

• Center hole diameter: 0.800 inches

Blade Types

There are two main types of blades available for the Z320M:

• Standard blades: Designed for efficient grass discharge

• Mulching blades: Optimized for finely cutting grass clippings

Part Numbers

The standard blade for the Z320M is typically identified by these part numbers:

• UC22008

• M170639 (older part number)

For mulching, the blade part number is:

• M170642

Blade Replacement

Replacing the blades on a Z320M involves these key steps:

1. Raise the mower deck to its highest position

2. Use a block of wood to prevent blade rotation

3. Remove the blade bolt using an 18mm socket

4. Install the new blade, ensuring correct orientation

5. Tighten the blade bolt securely

Maintenance Tips

• Replace blades in sets to maintain balance

• Sharpen or replace blades when they become dull

• Check blade balance after sharpening

• Inspect blades regularly for damage or wear

Benefits of Proper Blade Maintenance

• Improved cutting performance

• Better lawn health

• Reduced strain on the mower engine

• Enhanced fuel efficiency

Keeping the Z320M’s blades in good condition ensures a well-manicured lawn and optimal mower performance.

John Deere Z320M Manual

The John Deere Z320M zero-turn mower can be equipped with a MulchControl kit, which enhances its versatility and lawn care capabilities. This kit allows users to easily switch between mulching and side-discharge modes, providing flexibility for different mowing conditions.

Kit Details

The MulchControl kit for the John Deere Z320M is identified by the part number BUC10704. This kit is designed specifically for the 42-inch Accel Deep mower deck found on the Z320M and similar models.

Components

The kit typically includes:

• MulchControl baffle

• Fixed baffles

• Mulching blades

• Necessary hardware for installation

Functionality

When installed, the MulchControl system allows the operator to:

• Open the baffle for side discharge or collection

• Close the baffle for mulching

• Partially mulch even in side discharge mode

Benefits

• Improved lawn health by returning nutrients to the soil

• Reduced need for fertilizer

• Decreased grass clipping disposal

• Enhanced mowing efficiency

Installation

Installing the MulchControl kit involves:

• Removing the mower deck

• Installing the discharge plate and baffles

• Replacing standard blades with mulching blades

• Attaching the MulchControl handle

Compatibility

The BUC10704 kit is compatible with several John Deere models, including:

• Z315E

• Z320M

• Z320R

• Z335E

• X330, X350, X354, X370, X380, X590

Operation

To use the MulchControl system:

• Pull the lever to open the baffle for side discharge

• Push the lever to close the baffle for mulching

• Adjust based on grass conditions and desired results

Maintenance

Regular maintenance of the MulchControl kit includes:

• Cleaning the baffles and under-deck area

• Inspecting and sharpening mulching blades

• Checking for proper operation of the control lever

The MulchControl kit enhances the Z320M’s versatility, allowing users to adapt to various lawn conditions and preferences with ease.

John Deere Z320M Belt Diagram

Belt Routing Diagram

The John Deere Z320M zero-turn mower uses a deck belt to drive the mower blades. Here’s a simplified description of the belt routing:

1. Engine Pulley: The belt starts at the engine pulley at the rear of the mower.

2. Tension Idler: From the engine pulley, the belt routes around a spring-loaded tension idler pulley.

3. Fixed Idler: The belt then passes around a fixed idler pulley.

4. Right Spindle Pulley: The belt continues to the right spindle pulley (when viewed from the operator’s seat).

5. Center Spindle Pulley: From the right spindle, the belt routes to the center spindle pulley.

6. Left Spindle Pulley: The belt then moves to the left spindle pulley.

7. Back to Engine: Finally, the belt routes back to the engine pulley, completing the loop.

Key Components

• Engine Pulley: Drives the entire system

• Tension Idler: Maintains proper belt tension

• Fixed Idler: Helps guide the belt

• Spindle Pulleys: Drive the mower blades

Belt Tension

The tension idler pulley is controlled by a spring mechanism. This spring maintains proper tension on the belt, ensuring efficient power transfer from the engine to the mower blades.

Belt Guide

There is a belt guide near the rear tension idler. This guide helps keep the belt properly aligned on the pulley during operation.

Important Notes

• Always refer to the specific model’s operator manual for the most accurate belt routing information.

• Proper belt routing is crucial for optimal mower performance and longevity.

• When replacing the belt, ensure it is seated correctly in all pulley grooves and properly tensioned.

John Deere Z320M Oil Filter

Oil Filter Specifications

The John Deere Z320M zero-turn mower uses an oil filter with the part number AM125424. This filter is designed specifically for John Deere engines and provides high-quality filtration to ensure optimal engine performance and longevity.

Key Features

• Large inlet holes for consistent oil flow

• More media paper for improved filtering of harmful particles

• Rubber seals to prevent internal leakage

• Media securely bonded to metal end caps for added strength

• Enclosed in a poly bag to maintain cleanliness

Dimensions

• Weight: 0.295 kg

• Height: 7.874 cm

• Length: 6.604 cm

• Thread Size: 1.905 cm

Replacement Procedure

1. Warm up the engine by running it for a few minutes

2. Place an oil drain pan under the filter

3. Remove the old filter by turning it counterclockwise

4. Clean the filter mounting area

5. Apply a thin layer of clean oil to the new filter’s gasket

6. Install the new filter, tightening it by hand until the gasket contacts the engine

7. Give an additional half-turn to ensure proper sealing

Maintenance Schedule

• Change the oil filter during the initial oil change after 8 hours of use

• Subsequently, change the filter at least once a year or more frequently in dusty conditions

• Always refer to the operator’s manual for the specific maintenance schedule

Benefits of Regular Changes

• Ensures efficient engine operation

• Extends engine life

• Maintains optimal oil quality

• Prevents contaminants from circulating in the engine

Remember to dispose of used oil filters properly and in accordance with local regulations.

FAQ

1. What type of engine does the Z320M have?
The Z320M is equipped with a Kawasaki V-twin OHV petrol engine with a displacement of 726cc.

2. What is the cutting width of the Z320M?
The mower features a 42-inch (107 cm) Accel Deep™ cutting deck.

3. What is the top speed of the Z320M?
The Z320M can reach a forward speed of up to 7 mph (11.3 km/h).

4. Does the Z320M support mulching?
Yes, it can be equipped with an optional MulchControl™ kit for mulching capabilities.

5. How is the cutting height adjusted?
Cutting height is adjusted using a foot pedal and a knob, offering 14 increments between 1.25 inches (31.75 mm) and 4.5 inches (114.3 mm).

6. What type of transmission does the Z320M use?
The Z320M features a hydrostatic transmission for smooth and variable speed control.

7. Does the Z320M have towing capabilities?
Yes, it comes with a standard hitch for towing attachments.

8. What is the fuel tank capacity?
The mower has an 11.4-liter (3-gallon) fuel tank.

9. What warranty does the Z320M offer?
It includes a standard two-year unlimited hours warranty, extendable to three years or 120 hours for residential use.

10. Is the seat comfortable?
The Z320M has a high-back seat with optional armrests for enhanced operator comfort.

11. Can the Z320M handle uneven terrain?
Yes, it has large wheels and a roomy operator platform for smooth operation on tough terrain.

12. How are the blades engaged?
Blades are engaged electronically at the touch of a button.

13. Is there an option for grass collection?
Yes, an optional collection system can be installed for grass clippings.

14. How maneuverable is the Z320M?
Its zero-turn capability allows precise navigation around obstacles like trees and flowerbeds.

15. What maintenance is required for the Z320M?
Routine maintenance includes oil changes, blade sharpening/replacement, cleaning, and inspecting belts and filters regularly.