Kunz AcrEase MR44B - User Manual

1
12/20
44” ROUGH CUT
OWNER’S MANUAL
With Assembly Instructions
For Models: MR44B & MR44BC
KUNZ ENGINEERING, INC. / MENDOTA, IL 61342 / PH (815) 539-6954

Summary

SAFETY INTRODUCTION

Safety Alert Symbol

Symbol used to indicate safety instructions for personal injury and property damage.

Safety Messages and Signal Words

Messages preceded by alert symbols and signal words like DANGER, WARNING, CAUTION.

DANGER, WARNING, CAUTION Definitions

Definitions for DANGER, WARNING, and CAUTION signal words used in safety instructions.

IMPORTANT SAFETY INFORMATION

General Safety Rules

Do not allow untrained operators, keep clear of moving parts, remove objects from work area.

SAFETY SIGNS AND LOCATIONS

Warning and Danger Decals

Locations and instructions for warning, danger, and hazard decals on the mower.

Decal Replacement

Information on how to obtain replacement safety signs from Kunz Engineering.

ASSEMBLY INSTRUCTIONS

Items Included

List of parts that should be included with the mower assembly.

Rear Wheel and Carrier Arm Assembly

Step-by-step guide for attaching rear wheels and carrier arms to the mower deck.

ASSEMBLY: CARRIER ARM & CROSS BRACE

Carrier Arm Installation

Detailed instructions for installing carrier arms onto the mower deck's pivot arms.

Cross Brace Tube & Height Adjust Assy. Installation

Guide for attaching cross brace tubes and the height adjustment assembly.

ASSEMBLY: HEIGHT ADJUST ASSY.

Height Adjust Assy. Installation

Specific steps for installing the height adjustment assembly.

ASSEMBLY: TONGUE ASSEMBLY

Tongue Assembly Installation

Instructions for attaching the tongue assembly to the mower.

OPERATIONS AND ADJUSTMENTS

Intended Use

Specifies the type of terrain and vegetation the mower is designed to cut.

Tongue Configurations and Adjustments

How to adjust the mower's tongue for different towing positions.

ADJUSTING CUTTING HEIGHT

Adjusting Cutting Height

Explains how to set the desired cutting height using the adjustment crank.

Cutting Height Measurement

Details on how to measure and set the cutting height accurately.

CUTTING HEIGHT ADJUSTMENT DETAILS

Cutting Height Measurement

Details on how to measure and set the cutting height accurately.

Securing Crank While Not In Use

Method to secure the height adjustment crank to prevent it from unturning.

STARTING ENGINE PROCEDURE

Starting Engine

Steps for safely starting the mower's engine, including pre-start checks.

SHUTTING OFF AND MOWER OPERATION

Shutting Off Rough Cut Mower

Procedures for safely shutting down the mower's engine and clutch.

Mower Operation Safety

General safety precautions and operational guidelines for using the mower.

MAINTENANCE: DRIVE BELT

Drive Belt Removal and Tension

Instructions for removing, installing, and adjusting the drive belt tension.

MAINTENANCE: BELT AND BRAKE ADJUSTMENT

Belt Pattern, Spring Adjustment, and Brake Adjustment

Details on belt routing, spring tension, and brake adjustment for optimal performance.

MAINTENANCE: BRAKE STUD ADJUSTMENT

Brake Stud Adjustment

Procedures for adjusting the brake stud for proper belt braking action.

MOWER MAINTENANCE AND COMPONENTS

Blade Removal, Balancing & Installation

Steps for removing, balancing, and installing mower blades safely.

Lubrication and Engine Maintenance

Recommended lubrication points and engine maintenance references.

Storage and EPA Components

Guidelines for mower storage and information on EPA evaporative components.

MOWER SPECIFICATIONS

Engine Specifications

Technical details of the engine, including make, model, bore, stroke, etc.

Mower and Hitch Specifications

Technical details of the mower deck, construction, and hitch type.

PARTS LIST

Itemized Parts List

A detailed list of all parts with item numbers, part numbers, and quantities.

PARTS LIST CONTINUED

Continued Itemized Parts List

Continues the detailed list of parts with item numbers, part numbers, and quantities.

OPTIONAL EQUIPMENT: WETLANDS KIT

Optional Wetlands Kit

Features and applications of the optional wetlands kit for enhanced ground support.

OPTIONAL EQUIPMENT: ELECTRIC LIFT KIT

Optional Electric Lift Kit

Details on the electric lift kit, including its components and benefits.

OPTIONAL EQUIPMENT: FLOATATION KIT

Optional Floatation Kit

Information about the floatation kit for improved performance in wet or rough terrain.

WARRANTY POLICY

Warranty Terms and Conditions

Outlines the warranty coverage, duration, and limitations for the mower.

Overview

1. Function Description
2. Important Technical Specifications
3. Engine (MR44B)
4. Engine (MR44BC)
5. Mower (Both Models)
6. Clutch Type (Both Models)
7. Dimensions (Both Models)
8. Hitch (Both Models)
9. Usage Features
10. Maintenance Features

The document is an owner's manual for the AcrEase 44" Rough Cut Mower, specifically for models MR44B and MR44BC, manufactured by Kunz Engineering, Inc. The manual provides detailed instructions for assembly, operation, adjustments, and maintenance, along with safety information and specifications.

Function Description:

The AcrEase 44" Rough Cut Mower is a tow-behind mower designed for use with an ATV, UTV (utility vehicle/side-by-side), or small tractor. Its primary function is to cut grass, weeds, brush, and saplings up to 2 inches in diameter in rough, uneven terrain. The mower features a robust design with a 44-inch effective cutting width, making it suitable for clearing large areas. It is equipped with a single crank height adjustment system, allowing operators to easily change the cutting height from 2.0 to 8.0 inches. The hitching system offers flexibility, enabling the mower to be pulled directly behind the tow vehicle or offset to the left or right, enhancing maneuverability in various environments. A manual clutch engagement system controls the mower blades, and a belt brake ensures the blades stop quickly when disengaged for safety.

Important Technical Specifications:

Engine (MR44B):

• Make: Briggs & Stratton
• Model: Intek Professional
• Cylinders: 1
• Cycles: 4
• Crankshaft: Vertical
• Engine HP: 19
• Bore: 3.12"
• Stroke: 3.06"
• Displacement: 33.0 cu. In.
• Oil Capacity: 1.5 U.S. qt
• Crankshaft Dia.: 1.0"
• Key Slot: 1/4"
• Crankshaft Length: 3.15"
• Threaded Hole in End of Crankshaft: 7/16-20
• Engine Mounting Bolts: 5/16-18x1.50 Through Bolt
• Starter: Electric
• Choke: Manual

Engine (MR44BC):

• Make: Briggs & Stratton
• Model: Commercial Turf
• Cylinders: 2
• Cycles: 4
• Crankshaft: Vertical
• Engine HP: 23
• Bore: 3.12"
• Stroke: 2.89"
• Displacement: 44.2 cu. In.
• Oil Capacity: 2 U.S. qt
• Crankshaft Dia.: 1.0"
• Key Slot: 1/4"
• Crankshaft Length: 3.15"
• Threaded Hole in End of Crankshaft: 7/16-20
• Engine Mounting Bolts: 5/16-18x1.50 Through Bolt
• Starter: Electric
• Choke: Manual

Mower (Both Models):

• Fuel Tank: 3 Gal.
• Effective Cutting Width: 44"
• Deck Construction: 8 ga. Welded steel
• Cutting Height: 2" to 8"
• Height Adjustment: Single Crank
• Rear Wheels (Fixed) (4 ply Turf Pneumatic): Two 15/600 x 6
• Front Wheels (Caster) (4 ply Turf Pneumatic): Two 5.30/4.50 x 6
• Blade Dia.: 2-23"
• Engine Speed, Blades Running: 3500 RPM

Clutch Type (Both Models):

• Engagement Speed: Manual

Dimensions (Both Models):

• Length: 95.5"
• Width: 46.5"
• Height: 29"
• Weight (MR44B): 520 lbs.
• Weight (MR44BC): 530 lbs.

Hitch (Both Models):

• Hitch Type: ATV Tongue

Touch-Up Paint Color: Pewter Gray, Krylon #1606

Usage Features:

• Adjustable Cutting Height: The cutting height can be adjusted from 2.0" to 8.0" using a crank located at the back of the mower. Clockwise rotation raises the deck, while counter-clockwise rotation lowers it. Approximately 8 turns of the crank equate to 1 inch of vertical movement. The crank can be folded down to secure the height setting and prevent changes due to vibration.
• Flexible Towing Configurations: The tongue assembly allows for the mower to be pulled directly behind the tow vehicle or offset to the left or right. This is achieved by installing the hitch pivot on either the left or right carrier arm assembly and adjusting the tongue's position within the hitch pivot using wire lock pins.
• Screw Pin Shackle Clevis: The tongue is equipped with a screw pin shackle clevis, providing multi-directional movement for rough, uneven ground. It must be tightened securely to prevent separation from the tow vehicle.
• Manual Clutch Engagement: The mower features a manual clutch handle to engage the blades. Operators are instructed to engage the clutch slowly at about half throttle.
• Safety Features: Includes a belt brake that stops the blades when the clutch is disengaged. Safety labels are prominently placed on the mower to warn of potential hazards.
• Optional Equipment:
  • Wetlands Kit (Part # 003905): Adds an extra set of tires for increased ground support in soft or water-saturated areas. It doubles the tire surface area, is easy to install, and works on all rough cut mowers. Minimum cutting height with this kit is 3.5” – 4”.
  • Electric Lift Kit (Part # 003912): Consists of mounting hardware, brackets, an electric actuator, and wiring with a remote control panel. This allows for quick cutting height changes on the go from the tow vehicle's seat, useful for varying terrain and clearing obstacles like rocks and logs. It uses a heavy-duty 1500 lb linear screw actuator.
  • Floatation Kit (Rear: Part # 003907, Front: Part # 003908): Includes an additional front and rear tire with mounting brackets. Designed for mowing around ponds and on rough, uneven ground to prevent scalping. Features clamping-style receivers for side-to-side adjustments and pinned receivers for quick removal.

Maintenance Features:

• Drive Belt Removal and Tension: Instructions are provided for removing and installing the drive belt, as well as adjusting its tension. The initial spring length for a new belt should be approximately 2-3/4", and for a broken-in belt, between 2-3/4" and 3-1/4". Regular checks (every 3-4 hours) are recommended to ensure proper tension and maximize belt life.
• Mower Blade Removal, Balancing & Installation: The manual details how to safely remove blades (using a block of wood to prevent spinning), emphasizing the importance of balancing blades after sharpening to prevent excessive vibrations and premature wear. Specific torque (300 ft-lbs) is provided for the blade bolts (Kunz Engineering Part # 202141, 3/4” – 16NF x 1-1/4” long, grade 5).
• Lubrication: Three lubrication points are identified: one spring-loaded idler pivot and two caster wheel pivots. Lubrication is recommended at approximately 10-hour intervals or more frequently in dusty conditions.
• Engine Maintenance: Operators are directed to refer to the separate engine manual for detailed engine maintenance instructions.
• Storage: Instructions include turning off the fuel shut-off valve and covering the engine if stored outdoors to protect it from water during heavy rainstorms.
• Brake Stud Adjustment: The brake stud may require adjustment due to belt wear or different belt sizes. Periodic inspections (every 10 hours) are necessary to ensure proper braking force and prevent over-braking. The disengaged spring length should be between 3-1/4" and 4", and there should be at least 1/2" clearance between the brake stud and the belt when the clutch is engaged.
• EPA Evaporative Components: The mower is designed to meet EPA regulations. Any modifications to fuel system components (fuel tank, lines, vapor hose, cap, roll-over/fuel vapor valve, carbon canister, hose clamps) are prohibited. Replacement parts must be purchased from Kunz Engineering.

Kunz AcrEase MR44B Specifications

General

Brand	Kunz
Model	AcrEase MR44B
Category	Lawn Mower
Language	English