SEBU9004-10 (en-us)
May 2023
Operation and
Maintenance
Manual
308E2 CR Mini Hydraulic Excavator
FJX 1-UP (308E2)
TMX 1-UP (308E2)
W8S 1-UP (308E2 CR)
Language: Original Instructions
Scan to find and purchase genuine Cat® parts and related
service information.
, i07966018
Important Safety Information
Most accidents that involve product operation, maintenance and repair are caused by failure to observe
basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous
situations before an accident occurs. A person must be alert to potential hazards, including human factors
that can affect safety. This person should also have the necessary training, skills and tools to perform these
functions properly.
Improper operation, lubrication, maintenance or repair of this product can be dangerous and could
result in injury or death.
Do not operate or perform any lubrication, maintenance or repair on this product, until you verify
that you are authorized to perform this work, and have read and understood the operation,
lubrication, maintenance and repair information.
Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings
are not heeded, bodily injury or death could occur to you or to other persons.
The hazards are identified by the “Safety Alert Symbol” and followed by a “Signal Word” such as
“DANGER”, “WARNING” or “CAUTION”. The Safety Alert “WARNING” label is shown below.
The meaning of this safety alert symbol is as follows:
Attention! Become Alert! Your Safety is Involved.
The message that appears under the warning explains the hazard and can be either written or pictorially
presented.
A non-exhaustive list of operations that may cause product damage are identified by “NOTICE” labels on
the product and in this publication.
Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.
The warnings in this publication and on the product are, therefore, not all inclusive. You must not
use this product in any manner different from that considered by this manual without first
satisfying yourself that you have considered all safety rules and precautions applicable to the
operation of the product in the location of use, including site-specific rules and precautions
applicable to the worksite. If a tool, procedure, work method or operating technique that is not
specifically recommended by Caterpillar is used, you must satisfy yourself that it is safe for you
and for others. You should also ensure that you are authorized to perform this work, and that the
product will not be damaged or become unsafe by the operation, lubrication, maintenance or repair
procedures that you intend to use.
The information, specifications, and illustrations in this publication are on the basis of information that was
available at the time that the publication was written. The specifications, torques, pressures,
measurements, adjustments, illustrations, and other items can change at any time. These changes can
affect the service that is given to the product. Obtain the complete and most current information before you
start any job. Cat dealers have the most current information available.
NOTICE
When replacement parts are required for this product Caterpillar recommends using original Cater-
pillar® replacement parts.
Other parts may not meet certain original equipment specifications.
When replacement parts are installed, the machine owner/user should ensure that the machine re-
mains in compliance with all applicable requirements.
In the United States, the maintenance, replacement, or repair of the emission control devices and
systems may be performed by any repair establishment or individual of the owner's choosing.
,SEBU9004-10 3
Table of Contents
Table of Contents Operator Station .............................................. 35
Guards (Operator Protection) ......................... 35
Foreword ........................................................... 4
Safety Section Product Information Section
General Information ........................................ 37
Safety Messages............................................... 6
Identification Information ............................... 109
Additional Messages ....................................... 15
General Hazard Information............................ 17 Operation Section
Crushing Prevention and Cutting Prevention.. 20 Before Operation ............................................113
Burn Prevention............................................... 21 Machine Operation .........................................115
Fire Prevention and Explosion Prevention...... 22 Engine Starting.............................................. 173
Fire Extinguisher Location............................... 25 Operation....................................................... 176
Track Information ............................................ 25 Operating Techniques ................................... 180
High Pressure Fuel Lines ................................ 25 Parking .......................................................... 208
Electrical Storm Injury Prevention ................... 26 Transportation Information .............................211
Before Starting Engine .................................... 26 Towing Information ........................................ 216
Visibility Information ........................................ 26 Engine Starting (Alternate Methods)............. 219
Engine Starting................................................ 27 Maintenance Section
Before Operation ............................................. 27 Maintenance Access ..................................... 221
Work Tools....................................................... 27 Lubricant Viscosities and Refill Capacities ... 223
Operation......................................................... 28 Maintenance Support .................................... 230
Engine Stopping .............................................. 30 Maintenance Interval Schedule..................... 236
Lifting Objects.................................................. 31 Warranty Section
Demolition ....................................................... 31 Warranty Information..................................... 297
Parking ............................................................ 31 Reference Information Section
Slope Operation .............................................. 32 Reference Materials ...................................... 298
Equipment Lowering with Engine Stopped ..... 32 Index Section
Sound Information and Vibration Information . 33 Index.............................................................. 300
, 4 SEBU9004-10
Foreword
Foreword Whenever a question arises regarding your machine,
or this publication, please consult your Cat dealer for
the latest available information.
California Proposition 65 Warning
Safety
Diesel engine exhaust and some of its
constituents are known to the State of The safety section lists basic safety precautions. In
California to cause cancer, birth defects, addition, this section identifies the text and locations
of warning signs and labels used on the machine.
and other reproductive harm.
Read and understand the basic precautions listed in
WARNING – This product can the safety section before operating or performing
expose you to chemicals lubrication, maintenance, and repair on this machine.
including ethylene glycol, which
is known to the State of California to Operation
cause birth defects or other reproductive
harm. For more information go to: The operation section is a reference for the new
operator and a refresher for the experienced
www.P65Warnings.ca.gov operator. This section includes a discussion of
gauges, switches, machine controls, attachment
Do not ingest this chemical. Wash hands controls, transportation, and towing information.
after handling to avoid incidental Photographs and illustrations guide the operator
ingestion. through correct procedures of checking, starting,
operating, and stopping the machine.
WARNING – This product can
expose you to chemicals Operating techniques outlined in this publication are
basic. Skill and techniques develop as the operator
including lead and lead gains knowledge of the machine and its capabilities.
compounds, which are known to the
State of California to cause cancer, birth Maintenance
defects, or other reproductive harm. For
more information go to: The maintenance section is a guide to equipment
care. The Maintenance Interval Schedule (MIS) lists
www.P65Warnings.ca.gov the items to be maintained at a specific service
interval. Items without specific intervals are listed
Wash hands after handling components under the "When Required" service interval. The
that may contain lead. Maintenance Interval Schedule lists the page number
for the step-by-step instructions required to
accomplish the scheduled maintenance. Use the
Literature Information Maintenance Interval Schedule as an index or "one
safe source" for all maintenance procedures.
This manual should be stored in the operator's
compartment in the literature holder or seat back Maintenance Intervals
literature storage area.
Use the service hour meter to determine servicing
This manual contains safety information, operation
intervals. Calendar intervals shown (daily, weekly,
instructions, transportation information, lubrication
information, and maintenance information. monthly, etc.) can be used instead of service hour
meter intervals if the calendar intervals provide more
Some photographs or illustrations in this publication convenient servicing schedules and approximate the
show details or attachments that can be different indicated service hour meter reading. Perform the
from your machine. Guards and covers might have recommended service at the interval that occurs first.
been removed for illustrative purposes.
Under severe, dusty, or wet operating conditions,
Continuing improvement and advancement of more frequent lubrication than is specified in the
product design might have caused changes to your maintenance intervals chart might be necessary.
machine which are not included in this publication.
Read, study, and keep this manual with the machine.
May 2023
Operation and
Maintenance
Manual
308E2 CR Mini Hydraulic Excavator
FJX 1-UP (308E2)
TMX 1-UP (308E2)
W8S 1-UP (308E2 CR)
Language: Original Instructions
Scan to find and purchase genuine Cat® parts and related
service information.
, i07966018
Important Safety Information
Most accidents that involve product operation, maintenance and repair are caused by failure to observe
basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous
situations before an accident occurs. A person must be alert to potential hazards, including human factors
that can affect safety. This person should also have the necessary training, skills and tools to perform these
functions properly.
Improper operation, lubrication, maintenance or repair of this product can be dangerous and could
result in injury or death.
Do not operate or perform any lubrication, maintenance or repair on this product, until you verify
that you are authorized to perform this work, and have read and understood the operation,
lubrication, maintenance and repair information.
Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings
are not heeded, bodily injury or death could occur to you or to other persons.
The hazards are identified by the “Safety Alert Symbol” and followed by a “Signal Word” such as
“DANGER”, “WARNING” or “CAUTION”. The Safety Alert “WARNING” label is shown below.
The meaning of this safety alert symbol is as follows:
Attention! Become Alert! Your Safety is Involved.
The message that appears under the warning explains the hazard and can be either written or pictorially
presented.
A non-exhaustive list of operations that may cause product damage are identified by “NOTICE” labels on
the product and in this publication.
Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.
The warnings in this publication and on the product are, therefore, not all inclusive. You must not
use this product in any manner different from that considered by this manual without first
satisfying yourself that you have considered all safety rules and precautions applicable to the
operation of the product in the location of use, including site-specific rules and precautions
applicable to the worksite. If a tool, procedure, work method or operating technique that is not
specifically recommended by Caterpillar is used, you must satisfy yourself that it is safe for you
and for others. You should also ensure that you are authorized to perform this work, and that the
product will not be damaged or become unsafe by the operation, lubrication, maintenance or repair
procedures that you intend to use.
The information, specifications, and illustrations in this publication are on the basis of information that was
available at the time that the publication was written. The specifications, torques, pressures,
measurements, adjustments, illustrations, and other items can change at any time. These changes can
affect the service that is given to the product. Obtain the complete and most current information before you
start any job. Cat dealers have the most current information available.
NOTICE
When replacement parts are required for this product Caterpillar recommends using original Cater-
pillar® replacement parts.
Other parts may not meet certain original equipment specifications.
When replacement parts are installed, the machine owner/user should ensure that the machine re-
mains in compliance with all applicable requirements.
In the United States, the maintenance, replacement, or repair of the emission control devices and
systems may be performed by any repair establishment or individual of the owner's choosing.
,SEBU9004-10 3
Table of Contents
Table of Contents Operator Station .............................................. 35
Guards (Operator Protection) ......................... 35
Foreword ........................................................... 4
Safety Section Product Information Section
General Information ........................................ 37
Safety Messages............................................... 6
Identification Information ............................... 109
Additional Messages ....................................... 15
General Hazard Information............................ 17 Operation Section
Crushing Prevention and Cutting Prevention.. 20 Before Operation ............................................113
Burn Prevention............................................... 21 Machine Operation .........................................115
Fire Prevention and Explosion Prevention...... 22 Engine Starting.............................................. 173
Fire Extinguisher Location............................... 25 Operation....................................................... 176
Track Information ............................................ 25 Operating Techniques ................................... 180
High Pressure Fuel Lines ................................ 25 Parking .......................................................... 208
Electrical Storm Injury Prevention ................... 26 Transportation Information .............................211
Before Starting Engine .................................... 26 Towing Information ........................................ 216
Visibility Information ........................................ 26 Engine Starting (Alternate Methods)............. 219
Engine Starting................................................ 27 Maintenance Section
Before Operation ............................................. 27 Maintenance Access ..................................... 221
Work Tools....................................................... 27 Lubricant Viscosities and Refill Capacities ... 223
Operation......................................................... 28 Maintenance Support .................................... 230
Engine Stopping .............................................. 30 Maintenance Interval Schedule..................... 236
Lifting Objects.................................................. 31 Warranty Section
Demolition ....................................................... 31 Warranty Information..................................... 297
Parking ............................................................ 31 Reference Information Section
Slope Operation .............................................. 32 Reference Materials ...................................... 298
Equipment Lowering with Engine Stopped ..... 32 Index Section
Sound Information and Vibration Information . 33 Index.............................................................. 300
, 4 SEBU9004-10
Foreword
Foreword Whenever a question arises regarding your machine,
or this publication, please consult your Cat dealer for
the latest available information.
California Proposition 65 Warning
Safety
Diesel engine exhaust and some of its
constituents are known to the State of The safety section lists basic safety precautions. In
California to cause cancer, birth defects, addition, this section identifies the text and locations
of warning signs and labels used on the machine.
and other reproductive harm.
Read and understand the basic precautions listed in
WARNING – This product can the safety section before operating or performing
expose you to chemicals lubrication, maintenance, and repair on this machine.
including ethylene glycol, which
is known to the State of California to Operation
cause birth defects or other reproductive
harm. For more information go to: The operation section is a reference for the new
operator and a refresher for the experienced
www.P65Warnings.ca.gov operator. This section includes a discussion of
gauges, switches, machine controls, attachment
Do not ingest this chemical. Wash hands controls, transportation, and towing information.
after handling to avoid incidental Photographs and illustrations guide the operator
ingestion. through correct procedures of checking, starting,
operating, and stopping the machine.
WARNING – This product can
expose you to chemicals Operating techniques outlined in this publication are
basic. Skill and techniques develop as the operator
including lead and lead gains knowledge of the machine and its capabilities.
compounds, which are known to the
State of California to cause cancer, birth Maintenance
defects, or other reproductive harm. For
more information go to: The maintenance section is a guide to equipment
care. The Maintenance Interval Schedule (MIS) lists
www.P65Warnings.ca.gov the items to be maintained at a specific service
interval. Items without specific intervals are listed
Wash hands after handling components under the "When Required" service interval. The
that may contain lead. Maintenance Interval Schedule lists the page number
for the step-by-step instructions required to
accomplish the scheduled maintenance. Use the
Literature Information Maintenance Interval Schedule as an index or "one
safe source" for all maintenance procedures.
This manual should be stored in the operator's
compartment in the literature holder or seat back Maintenance Intervals
literature storage area.
Use the service hour meter to determine servicing
This manual contains safety information, operation
intervals. Calendar intervals shown (daily, weekly,
instructions, transportation information, lubrication
information, and maintenance information. monthly, etc.) can be used instead of service hour
meter intervals if the calendar intervals provide more
Some photographs or illustrations in this publication convenient servicing schedules and approximate the
show details or attachments that can be different indicated service hour meter reading. Perform the
from your machine. Guards and covers might have recommended service at the interval that occurs first.
been removed for illustrative purposes.
Under severe, dusty, or wet operating conditions,
Continuing improvement and advancement of more frequent lubrication than is specified in the
product design might have caused changes to your maintenance intervals chart might be necessary.
machine which are not included in this publication.
Read, study, and keep this manual with the machine.
