Harbor Freight Tools 91840, 91839 User Manual
LOG SPLITTER
Models
91839, 91840 & 92199
WITH ROBIN® ENGINE
SET UP AND OPERATING INSTRUCTIONS
WARNING!
IMPORTANT INFORMATION
This trailer’s Hitch Coupler MUST be
properly secured to the hitch ball of the towing
vehicle. After assembly and attachment, pull
up and down on the Hitch Coupler to make
sure the hitch ball is fitting snugly in the Hitch
Coupler. There must be no play between
the hitch ball and Hitch Coupler. If there is
play, tighten the Adjustment Nut until no play
is present. If the Adjustment Nut is too tight,
the Handle will not lock. Carefully read and
follow the complete instructions in this
manual BEFORE setup or use.
If the Coupler is not secured
properly, the ball could come loose
while the trailer is in motion, possibly
causing property damage, SERIOUS
PERSONAL INJURY, or DEATH.
Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described herein.
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright© 2004 by Harbor Freight Tools®. All rights reserved. No portion of this manual
or any artwork contained herein may be reproduced in any shape or form without the
express written consent of Harbor Freight Tools.
For technical questions or replacement parts, please call 1-800-444-3353.
REV 04k,06b,07j
Specifications
Log Capacity 25” Long, 8” Diameter Tire Air Pressure 60 PSI Cold
Overall Dimensions 79-1/4” x 42-1/2” x 37-1/4” Wedge Size 7-1/8” Tall
Hydraulic Fluid Capacity 2.5 Gallons Toe Plate Thickness 1-5/8”
Wheel Size 8” Diameter, DOT Approved Ram Diameter 1-3/4” Overall
Model SKU 91839 SKU 91840 SKU 92199
Engine 9HP EX-27 Robin
Cylinder Diameter 4-1/2” 5” 4.5”
Tons of Force 24 30 22
Pump Haldex® 11 GPM, 2-Stage Gear Haldex® 16 GPM, 2-Stage Gear Haldex® 11 GPM, 2-Stage Gear
Weight 498 lb. 640 lb. 492 lb.
®
9HP EX-27 Robin
®
6HP Robin
®
This product requires engine oil, hydraulic oil, and fuel to be added before starting.
Attempting to start the engine without oil will ruin the engine and void the warranty.
Before starting the engine, refer to the engine owners manual for additional engine
maintenance information.
Note: 8” maximum diameter applies to most soft to medium types of woods. Maximum di-
ameter of hardwoods may vary depending on density of the wood.
Note: Read and follow the instructions and safety warnings in the manual that accompanies the Robin® engine. Engine specifications are listed in the engine manual.
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lighted.
3. Keep children away; this unit may produce hazardous flying debris. Children must
never be allowed in the work area. Do not let them handle machines or tools.
4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and keep out of reach of children.
5. Use the right tool for the job. Do not attempt to force a small tool or attachment to do
the work of a larger industrial tool. There are certain applications for which this tool was
designed. It will do the job better and more safely at the rate for which it was intended.
Do not modify this tool and do not use this tool for a purpose for which it was not intended.
SKUs
& 92199
91839, 91840
For replacement parts, please call 1-800-444-3353.
REV 07a
Page 2
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving
parts. Protective, electrically nonconductive clothes and nonskid, steel toe footwear are
recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye protection. Always wear ANSI-approved impact safety glasses underneath a
full face shield. Wear a NIOSH-approved dust mask or respirator when working around
wood dust.
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across the Log Splitter.
9. Maintain tools with care. Keep tools sharp and clean for better and safer performance.
Follow instructions for lubricating and changing accessories. Inspect tool hoses periodically, and if damaged, have them repaired by an authorized technician. The handle must
be kept clean, dry, and free from oil and grease at all times.
10. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are
removed from the tool or machine work surface before plugging it in.
11. Never leave the Log Splitter unattended while in operation.
12. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
13. Never attempt to split two logs on top of each other.
14. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check for alignment and binding of moving parts; any broken parts
or mounting fixtures; and any other condition that may affect proper operation. Any part
that is damaged should be properly repaired or replaced by a qualified technician. Do
not use the tool if any switch does not turn On and Off properly.
15. Always operate the Log Splitter on a dry, flat, level surface with the wheels
blocked.
16. Replacement parts and accessories. When servicing, use only identical replacement
parts. Use of any other parts will void the warranty. Only use accessories intended for
use with this tool. Approved accessories are available from Harbor Freight Tools.
17. Do not operate tool if under the influence of alcohol or drugs. Read warning labels
if taking prescription medicine to determine if your judgment or reflexes are impaired
while taking drugs. If there is any doubt, do not operate the tool.
18. Maintenance. For your safety, service and repairs should be performed regularly by a
qualified technician. Maintenance should be performed regularly.
19. Never place your hands or body near a hydraulic fluid leak. Never check for a leak
with your hands or other body parts. High-pressure fluid can be forced under your skin
resulting in serious injury.
20. Never place hands or feet between the log and splitter wedge, or between the log
and the ram during the forward or reverse stroke.
21. This equipment must never be used in any sealed structure. Carbon
monoxide is produced during operation and is DEADLY in a closed
environment. Early signs of carbon Monoxide poisoning resemble the flu,
with headaches, dizziness, or nausea. If you have these signs, the tool may
not be working properly or is improperly vented, get fresh air immediately.
SKUs
& 92199
91839, 91840
For replacement parts, please call 1-800-444-3353.
Page 3
22. Never split a log that contains any foreign materials.
23. WARNING: The brass components in this product contain lead, which is a chemical
known to the State of California to cause cancer and birth defects or other reproductive
harm. (California Health & Safety Code § 25249.5, et seq.)
24. People with pacemakers should consult their physician(s) before using this
product. Electromagnetic fields in close proximity to a heart pacemaker could cause
interference to or failure of the pacemaker.
Warning: The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be built
into this product, but must be supplied by the operator.
Unpacking
When unpacking, check to make sure the parts listed on page 9 are included. If any
parts are missing or broken, please call Harbor Freight Tools at the number on the cover of
this manual as soon as possible.
Assembly
Note: Because of the weight and size of the Log Splitter, assembly should be done with the
help of another person.
Attaching the Tires
Refer to the Assembly Drawing on page 9 and FIGURE 1 on page 5.
1. Position the Tires (48) next to each of the Axles located on the bottom of the Oil Tank
Assembly (10). The Tires (48) come completely assembled.
2. Make certain to pack the bearings as explained in the included insert.
3. Put a Seal (59) and Bearing (49) on the Axle and then put the Tire (48) on the Axle.
4. Follow the Bearing Packing Instructions as explained on the last page of this
manual. With each Tire (48) in place, add a Washer (50) and a Spindle Nut (51) onto
the ends of the Axles. Tighten the Spindle Nuts (51) to 20-25 ft. pounds, and turn each
tire several times to seat the bearing. Back off the Spindle Nut (51) one half turn. Insert
a Cotter Pin (25) through both the Axle and the Spindle Nut (51) and bend the end of
the Pin back to hold it in place. Lastly, tap on a Wheel Cap (61).
The Tire (48) assembly is now complete. Note: It may be necessary to reset the wheel
bearings after the Log Splitter has been towed.
The wheel manufacturer states the maximum speed is not to exceed 40 MPH. The tires
are DOT approved for public roads; however, this item is not for use on public roads
or highways.
SKUs
& 92199
91839, 91840
For replacement parts, please call 1-800-444-3353.
REV 11/04
Page 4
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