Central Hydraulics 93167 User Manual

TRENCHER

93167

ASSEMBLY AND OPERATING INSTRUCTIONS

Due to continuing improvements, actual product may differ slightly from the product described herein.

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

Copyright© 2005 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 and replacement parts, please call 1-800-444-3353.

Contents

Specifications ...............................................................................3

Safety Warnings and Precautions ...............................................4

Product Specific Safety Precautions ......................................5

Unpacking .....................................................................................6

Assembly .......................................................................................7

Hose Connection Diagram .......................................................8

Purging Air From The Trencher ...............................................9

Transport ......................................................................................10

Locking the Boom in Place .....................................................10

Setup .............................................................................................12

Engine Preparation .................................................................12

Attaching Leg Assembly .........................................................13

Operation ......................................................................................14

Starting the Engine .................................................................14

Digging Depth Adjustment .....................................................15

Boom Controls .........................................................................15

Boom Operation ......................................................................15

Moving the Trencher ................................................................16

Maintenance .................................................................................17

Lubrication Points ...................................................................18

Parts List ......................................................................................19

Assembly Diagram ......................................................................20

SKU 93167 For technical questions, please call 1-800-444-3353

Page 2

SPECIFICATIONS

Ripping Force 4,400 lbs. at the bucket

Digging Depth 7 feet maximum

Digging Reach 8 feet maximum

Hydraulic Rams 2 up and down, 1 right and left, 1 bucket movement

Hydraulic Pump Single Stage; 2.7 GPM

Pump Stage Single

Ram Diameter 1-1/4”

Hydraulic Oil Capacity 2.4 to 3.57 gallons

Operation Controls 4-arm control valves

Seat 32-1/2 (H) inches from floor

Frame Size 81-1/2” (L) x 37” (W); Main Beam: 4” (W) x 5-3/4” (H)

Wheel Base 58-3/4 inches

Wheel Load Capacity 780 lbs. each

Wheel Size 4.8-4.0-12

Bucket Load Capacity 1.24 cu. ft.

Bucket Size 12” (W) x 20” (L) (outside); 11-1/2” (W) x 12-1/4” (D) (inside)

Hose Ratings 20,000 PSI burst pressure; 10,000 PSI working pressure

Overall Towing Dimensions 12’ L x 5’ 7” W x 5’ 6” H

9 HP Robin Subaru®: EX27 with overhead cam

- 4000 RPM (max.); 3600 (continuous)

Engine

Towing Restrictions

Weight 1056 lbs.

- One cylinder, 4 cycle engine, 265-cc

- Gas tank: 1.59 gallon; Fuel: unleaded gas

- Oil capacity and type: 33.8 Fl. oz.; At 32~86°F: F-SAE 10W-30; 20W,
30W

- Starter: Recoil

This Trencher is not approved by the Dept. of Transportation for towing
on public roads. Check local laws for further restrictions on use.

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.

SKU 93167

For technical questions, please call 1-800-444-3353

REV 05j; 07d; 07f

Page 3

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. Keep work area well lighted and erect barricades or
use other means to prevent unauthorized personnel from entering the vicinity.

3. Keep children away. Children must never be allowed in the work area. Do not let them
handle machines, tools, or extension cords.

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.

6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving
parts. Protective, electrically nonconductive clothes and nonskid footwear are recom­mended when working. Wear restrictive hair covering to contain long hair.

7. Always wear ANSI approved safety goggles, heavy work gloves, a hardhat, and

steel-toed heavy work boots when setting up or using this product.

8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.

9. Maintain tools with care. Follow instructions for lubricating and changing accessories.
Inspect tool hydraulic hoses periodically and, if damaged, have them repaired by an au­thorized technician. The handles 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 machine work surface before operating.

11. Avoid unintentional starting. Be sure the switch is in the Off position when not in
use.

12. Stay alert. Watch what you are doing, use common sense. Do not operate any tool when
you are tired.

13. 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.

14. 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

SKU 93167

For technical questions, please call 1-800-444-3353

Page 4

use with this tool. Approved accessories are available from Harbor Freight Tools.

15. 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.

16. Maintenance. For your safety, service and maintenance should be performed regularly
by a qualified technician.

Product Specific Safety Precautions

1. This unit can exert thousands of pounds of force and, if used improperly, can cause

broken bones, dismemberment, or DEATH.

2. Avoid Fires. Flames or sparks near engine fuel can cause fire or explosion. Do not spill
fuel. If fuel is spilled, clean it up and do not start engine until fumes are gone. Do not
smoke while fueling or if near fuel or fumes. Stop engine before fueling. Do not fuel a hot
engine. Stop engine and let it cool off before checking or adding fuel.

3. Engine exhaust gases can kill. Vent exhaust outside if used indoors, or use outside. Use
away from any building air intakes. Avoid carbon monoxide poisoning from Engine
exhaust. Read Warning on page 12.

4. Moving parts can cause injury. Keep hands, hair, loose clothing, and tools away from
moving parts such as fans, belts, hydraulic rams, boom or boom extension, and bucket
assembly.

5. Avoid injury from hydraulic fluid. Hydraulic fluid under pressure can cause burns,

cuts, and other injuries if released due to a break in the hydraulic hose lines, or loose
fittings. If a break occurs, immediately turn Engine off. Inspect the lines carefully

for leakage; pinpoint leaks could result in hydraulic fluid being injected into the skin,

resulting in SERIOUS PERSONAL INJURY.

NEVER CHECK FOR A LEAK USING YOUR HANDS.

6. Use the Trencher on a proper surface. Locate on a flat, level, and solid surface that is
capable of supporting the weight of the Trencher, plus the load.

7. Avoid accidents while towing Trencher. Maximum speed while towing is 30 MPH.

8. Avoid damage to engine. Check oil level before each use. Add oil if necessary. Refer
to the engine service manual provided with this product.

9. Contact your local utility companies before beginning any project. Buried utility
lines may not be marked and, if struck, may cause SEVERE PERSONAL INJURY or
DEATH.

10. 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. In addition, people with pacemakers should adhere to the
following:

- Caution is necessary when near the magneto or spark plug cables of a running en­gine.

SKU 93167

For technical questions, please call 1-800-444-3353

Page 5

11. Always use in full accord with OSHA guidelines and safe workplace practices.

12. Keep all personnel not trained for and directly involved in the use of this item well

away from the work area. We recommend that only licensed drivers use this ma­chine.

13. This unit is not designed for the demolition of buildings; a building may collapse
on the machine during demolition, causing damage to the machine and severe
injury to the operator.

14. Warning: This product contains or, when used, produces 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.)

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.

CHECK LOCAL LAWS BEFORE USE.

UNPACKING

When unpacking, check to make sure that all of the assemblies shown below 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.

SKU 93167

For technical questions, please call 1-800-444-3353

REV 07f

Page 6