MEROTEC Yard force YF48vRX-RER38 Owner's Manual
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MEROTEC Yard force YF48vRX-RER38 Owner's Manual

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YF48vRX-RER38
RIDING LAWN MOWER
OWNER'S MANUAL
Our Customer Service staff is ready to provide assistance.
In the case of a damaged or missing part, most replacement parts ship directly from Merotec
USA in Atlanta or from one of our service partners in the US.
For immediate help with assembly, or for additional product information, email support@
MerotecUSA.com or call 866-902-9690 M-F 8:30am – 5:00pm ET. More information can be
found on www.YardForceUSA.com.
SAVE THIS MANUAL FOR REFERENCE
You will need this manual for safety
instructions, operating procedures, and Warranty.
The original sales receipt is required for warranty service.
YF48vRX-RER38

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Questions and answers

Thomas Holich
July 21, 2025

YF48vRX-RER38 battery charger is not charging the batteries, I disconnected all the batteries, charged them each one at a time, replaced 2 that wouldn't charge all the way; after replacing batteries I had 100 percent charge, after using the mower then I placed on charge it was at 61 percent charge, next day I checked the charge and it was still 61 percent charged, I am thinking the charger is not working could it be the plug?

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Steve Whitney
May 9, 2025

Order#1014772. You sent an ignition switch for the broken switch on my Yard Force Electric Riding Lawn Mower YF48vRX-RER38 and no key. The current key does NOT fit this switch. Why not a new key with it?

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Steve Whitney
May 9, 2025

Order# 1014772

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Summary of Contents for MEROTEC Yard force YF48vRX-RER38

  • Page 1 OWNER'S MANUAL Our Customer Service staff is ready to provide assistance. In the case of a damaged or missing part, most replacement parts ship directly from Merotec USA in Atlanta or from one of our service partners in the US.

  • Page 2: Table Of Contents

    YF48vRX-RER38 Original Instructions TABLE OF CONTENTS Safety Instructions………………..…..…..…..…..…..…..…..…..…..3 Safety Rules for Charger…………..…...…..…..…..…..…..…..…..…..7 Description of Symbols…………..…..…..…..…..…..…..…..…..…...9 Parts List…………..…..…..…..…..…..…..…..…..…....…..…..11 Technical Specifications………..…..…..…..…..…..…..…..…..…....15 Assembly……………..…..…..…..…..…..…..…..…..…....…....16 Operation…………………..…..…..…..…..…..…..…..…..…....21 Maintenance and Storage………..…..…..…..…..…..…..…..…..…..29 Troubleshooting………… ..…..…..…..…..…..…..…..…..…..…..41 Warranty……………..…..…..…..…..…..…..…..…..…....…..43...

  • Page 3: Safety Instructions

    SAFETY INSTRUCTIONS WARNING! To reduce the risk of injury, the user must read and understand the operator’s manual before using this product. WARNING! READ AND UNDERSTAND ALL INSTRUCTIONS. Failure to follow all instructions listed below and on the machine could result in electric shock, fire, serious personal injury and/or death.
  • Page 4 SAFETY INSTRUCTIONS • Operate the lawn mower only in daylight or good artificial light. • Use safety glasses — Always wear eye protection with side shields marked to comply with ANSI Z87.1. Use face mask if operation is dusty. • Use the right appliance —...
  • Page 5 SAFETY INSTRUCTIONS • Replace the blade if it is damaged in any way. Repair any damage before restarting and continuing to operate the mower. • Slopes are a major factor related to loss of control and tip-over accidents, which can result in severe injury or death.
  • Page 6 SAFETY INSTRUCTIONS blades only. Use of unauthorized parts may create a risk of serious injury to the user or damage to the product. • Maintain or replace safety instructions labels, as necessary. • Remove start key — Remove start key from the mower before storing, servicing, or changing accessories such as blades.

  • Page 7: Safety Rules For Charger

    SAFETY INSTRUCTIONS for possible special disposal instructions. • When batteries are not in use, keep away from other metal objects like paper clips, coins, keys, nails, screws, or other small metal objects that can make a connection from one terminal to another.
  • Page 8 SAFETY RULES FOR CHARGER • This charger is to be used only for charging this 48V mower. Use with other products or batteries may cause personal injury as well as damage to the product or charger. • Lead acid batteries may generate explosive hydrogen gas during normal operation. Keep sparks, flames, and smoking materials away from batteries.

  • Page 9: Description Of Symbols

    DESCRIPTION OF SYMBOLS The following symbols are used on the product and in this manual to alert the operator of potential safety hazards. Read them carefully, and understand their meaning. DANGER! Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
  • Page 10 DESCRIPTION OF SYMBOLS Keep all children, bystanders, and animals at least 100 ft. away. Thrown objects can ricochet and result in personal injury or property damage. Thrown objects can ricochet and result in personal injury or property damage. Never direct discharged material toward anyone. Never carry children or anyone, even when the blades are off.

  • Page 11: Parts List

    PARTS LIST KNOW YOUR LAWN MOWER (See Fig.1) Fig. 1 12. Control Pannel Brake Pedal 12a. Media Holder Accelerator Pedal 12b. Power Switch with Start Key Parking Pedal 12c. Headlight Button Charging Port 12d. Reverse Mode Button Hitch Point 12e. Blade Engage Knob Wash Port 12f.
  • Page 12 PARTS LIST The safe use of this product requires an understanding of the information on the product and in this operator’s manual as well as a knowledge of the project you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules. •...
  • Page 13 PARTS LIST NOTICE! Attempting to charge devices rated more than 2 amps could damage the USB charging port and/or the mower. WARNING! Never use headphones or any electronic device, such as a smart phone or tablet, while operating the mower. Distracted operation can result in an accident that could result in death or serious personal injury to the operator or a bystander.
  • Page 14 PARTS LIST Fig. 2 MANUAL Fig. 2a Flange Nut (A) Washer (E) Washer (D) Spring (C) Bolt (G), Spring Washer (H), Washer (I) Bolt (B) Flange Nut (A) Bolt (B) Flange Nut (A) BoFlange Nuts (A) and Bolt (B) are attached to seat for shipment.lt (B)

  • Page 15: Technical Specifications

    PRODUCT SPECIFICATIONS Dimension Assembled Length 63.5" (1610mm) Assembled Height 45.5" (1155mm) Assembled Width Without Discharge Deflector 38" (960mm) Net Weight 595 lb (270 kg) Mower & Deck Pneumatic Tire Sizes 15" x 6" x 6" Front, 16" x 6.5" x 8" Rear Cutting Width 38"...

  • Page 16: Assembly

    ASSEMBLY TOOLS NEEDED The following tools (not included or drawn to scale) are needed for assembly:(See Fig. 3) Torque Wrench Socket Wrench with 12 mm, 13 mm, and 14 mm sockets And 6mm Hex Bit Tire Pressure Gauge Fig. 3 UNPACKING (See Fig.
  • Page 17 ASSEMBLY Fig. 4 ASSEMBLY WARNING! Strictly adhere to all torque wrench tightening specifications. Failure to do so could cause serious personal injury. WARNING! Do not attempt to modify this product or create accessories not recommended for use with this product. Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury.
  • Page 18 ASSEMBLY Fig. 6 Seat Asembly Safety Interlock Cable Plug Wiring Cover Flange Nut (A) Bolt (B) Mounting Bracket Bolt (B) ASSEMBLE THE STEERING COLUMN (See Fig. 7&8) • Install the upper steering shaft onto the lower steering shaft, rotate as needed to align the holes in both shafts.
  • Page 19 ASSEMBLY FINAL PREPARATION CHECK TIRE PRESSURE Check the air pressure in all tires before use. Improper air pressure will affect handling, steering response, traction, tire life, level cutting, and operator comfort. Be sure tires are inflated to the pressure shown below. NOTE: Tire pressure should only be measured or adjusted when tires are cold.
  • Page 20 ASSEMBLY TEST THE SAFETY INTERLOCK SYSTEM (See Fig. 10.) This mower features a Safety Interlock System to protect the operator by shutting off the blades if the operator leaves the seat with the blades running. Test the system to be sure it is working correctly. To test: •...

  • Page 21: Operation

    OPERATION WARNING! Do not allow familiarity with products to make you careless. Remember that a careless fraction of a second is sufficient to inflict serious injury. WARNING! Always wear eye protection with side shields marked to comply with ANSI Z87.1. Failure to do so could result in objects being thrown into your eyes resulting in possible serious injury.
  • Page 22 OPERATION SETTING AND RELEASING THE PARKING BRAKE (See Fig.12.) To set the parking brake: • Place the direction control switch in the neutral (N) position. • Fully depress and hold the brake pedal. • Fully depress and hold the parking pedal. •...
  • Page 23 OPERATION NOTE: To prevent scalping the lawn when encountering high spots, the cutting deck wheels should be positioned approximately 1/2 in. off the ground when the mower is at the desired cutting height. When shipped, the cutting deck wheels are set to the 1.5 in. position. Depending on your desired cutting height, you may need to change the position of the cutting deck wheels.
  • Page 24 OPERATION CHARGING THE MOWER (See Fig.16.) It is recommended the batteries are charged minimum 4 hours before first use regardless of battery level indicator reading. Mower batteries must be fully charged before first use. To verify mower batteries are fully charged, check the battery level indicator.
  • Page 25 OPERATION LED INDICATOR BATTERY/CHARGER STATUS Solid red Batteries are not being charged. One green flash Batteries are being charged. Two green flashes Batteries are being trickle charged. After a sort time, LED will change to one green flash. Solid green Batteries are fully charged.
  • Page 26 OPERATION Forward Mowing Fig. 17 Reverse Mode Operation Fig. 18 Mowing: • Raise the mower deck to its highest position. • Insert start key and turn to ON position. • To release the parking brake: depress and release the brake pedal. •...
  • Page 27 OPERATION • Place direction control switch in reverse (R) position. • Press the reverse mode button. • Raise the blade engage knob, slowly press accelerator pedal, and reverse mow as needed. WARNING! Do not mow in reverse unless absolutely necessary. Always look down and behind before and while backing to make sure no children, bystanders, or pets enter the mowing area.
  • Page 28 OPERATION Fig. 19 SLOPE OPERATION (See Fig.20.) WARNING! Slopes are a major factor related to tip-over and roll-over accidents that can result in severe injury or death. Operation on slopes requires extra caution. If you feel uneasy on a slope, do not mow it. For your safety, do not attempt to mow steep slopes greater than 15 degrees.

  • Page 29: Maintenance And Storage

    MAINTENANCE AND STOARGE needed to control the speed. The mower will freely roll if it is moved on an inclined surface without pressing the brake pedal or setting the parking brake. Failure to follow these instructions can result in loss of control and result in death, serious personal injury, or property damage. WARNING! Use care when loading or unloading the mower onto a trailer.
  • Page 30 MAINTENANCE AND STOARGE GENERAL MAINTENANCE Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, dust, oil, grease, etc. Remove any build-up of grass and leaves on or around the motor cover.
  • Page 31 MAINTENANCE AND STOARGE ADJUSTING CUTTING DECK WHEELS (See Fig. 23) The cutting deck wheels should be positioned approximately 1/2 in. off the ground when the mower is at the desired cutting height. This will minimize the chance of scalping the lawn in most situations. When shipped, the wheels are positioned in Position A.
  • Page 32 MAINTENANCE AND STOARGE REPLACING CUTTING BLADES (See Fig. 25&26) CAUTION! Only use replacement blades and blade bolts authorized by the manufacturer of your riding mower. Use of blades and blade bolts not authorized is hazardous and may damage your riding mower. •...
  • Page 33 MAINTENANCE AND STOARGE Shaft Blade Half Circle Post Blade Circle Post Center Blade Hole Blade Circle Hole Blade Half Circle Hole Spacer Blade Blade Nut Fig. 26 TIRE MAINTENANCE This mower is equipped with tubeless tires of the size and type listed below: Front Tire Size Rear Tire Size 15"...
  • Page 34 MAINTENANCE AND STOARGE • Turn each adjustment nut 1/4 turn clockwise, then try again to push the mower. • Continue rotating each nut 1/4 turn and testing until the mower can no longer be moved by pushing. After final adjustment, test the brakes by driving the mower at normal speed on flat ground to be sure the mower stops quickly when the brake pedal is depressed.
  • Page 35 MAINTENANCE AND STOARGE Fig. 28 Fig. 28 Bottom Edge Blade Bottom Edge Blade Jam Nut Adjustment Jam Nut Nuts Adjustment Jam Nut Nuts Fig. 29 Jam Nut REPLACING THE BATTERIES (See Figures 30, 31, 32 and 33) Fig. 29 NOTE: Only use YARD FORCE Electric Riding Lawn Mower 75Ah (LPC12-75) lead acid battery. This mower operates on four 12 volt batteries connected in a series.
  • Page 36 MAINTENANCE AND STOARGE Seat Safety Interlock Cable Wiring Cover Battery Quick-connect Plug Bolt Fig. 30 Battery Compartment Cover Screws Fig. 31...
  • Page 37 MAINTENANCE AND STOARGE Flange Bolts Battery Tray Fig. 32 Securing Bracket Battery Covers Bolt Lock Washer Washer Fig. 33 • Park the mower on a level surface and set the parking brake. • Stop the blades, turn off the mower and remove the start key. •...
  • Page 38 MAINTENANCE AND STOARGE NOTE: To gain enough leverage to reconnect, it is often easier to connect from the battery compartment area rather than the area under the seat. • Once the batteries are reconnected to the mower, push the battery tray fully back inside the mower. •...
  • Page 39 MAINTENANCE AND STOARGE PREPARING FOR USE AFTER STORAGE The following steps should be taken before using the mower after it has been stored: • Review maintenance chart. • Fully charge the batteries. • Check tire pressure and inflate as needed. •...
  • Page 40 MAINTENANCE AND STOARGE NOTE: Maintenance should be performed more frequently when mower is used in dusty areas. When mower has exceeded the maximum figures specified in the table, maintenance should still be cycled according to the intervals of time or hours stated herein. If you are unsure how to perform any of the maintenance items listed above, take the mower to an authorized service center for assistance.

  • Page 41: Troubleshooting

    TROUBLESHOOTING IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM CONTACT YARD FORCE CUSTOMER SERVICE AT 866-902-9690 Fault/Malfunction Cause(s) Solution(s) 1. Charge the battery. 1. Battery charge is low. 2. Disconnect charger from mower. 2. Charger is connected to mower. 3. Install start key and turn to ON Mower not starting.
  • Page 42 TROUBLESHOOTING 1. Ensure safety interlock system Blades continue to turn after seat plug is fully connected. 1. Safety interlock system is not operator leaves seat without If blades still won’t stop, take functioning correctly. parking pedal set. mower to authorized service center for repair.

  • Page 43: Warranty

    Any unauthorized service or changes to the original configuration of this product will void the warranty. All parts and accessories used on and with this product must be manufacturer/or and authorized by Merotec Inc. (90) Ninety-Day Warranty – Accessories The accessories included with the YF48vRX-RER38;...
  • Page 45 Register online today at: www.yardforceusa.com/product-registration Merotec Inc. 3655 Kennesaw North Industrial Parkway Kennesaw, GA 30144 Copyright © 2022 Merotec Inc. Part Number: YF48vRX-RER38-MAN-A Made in China at a SUMEC manufacturing facility. 2204...

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