Pittsburgh 58816 Assembly instructions

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Email our technical support at: [email protected]
Item 58816
Weight Capacity 8 Tons (16,000 lb.)
Maximum Height 43"
Minimum Height 24"
Maximum Air
Pressure 120 PSI
Air Inlet 1/4"-18 NPT
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual (or month and year of purchase if product has no number). Keep this manual and the
receipt in a safe and dry place for future reference. 22f
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright©2022 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.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Page 2 For technical questions, please call 1-888-866-5797. Item 58816
SAFETY OPERATION MAINTENANCESETUP
Table of Contents
Safety ......................................................... 2
Setup .......................................................... 4
Operation.................................................... 5
Maintenance.............................................. 10
Parts List and Diagram.............................. 12
Warranty .................................................... 14
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INSTRUCTIONS
Read all safety warnings and instructions. Failure to follow the warnings and instructions may result in
serious injury and DEATH from sudden failure of Jack or device. Save all warnings and instructions for
future reference.
1. Study, understand, and follow all instructions
before operating this device.
2. Install ONLY on device designed for
a Jack with the same rating:
• A device designed for a Jack with
a higher rating may damage the Jack
or cause it to suddenly fail under load.
• A device designed for a Jack with a lower rating
may be damaged or may suddenly fail under load.
3. Mount properly as part of a device designed for
this type of Jack before use.
Mounting points, maximum length, and rating
must be IDENTICAL. Do not mount on different
device or use while not mounted properly.
4. Do not use upside-down.
5. Do not adjust safety valve.
6. Wear ANSI-approved safety goggles and
heavy-duty work gloves during use.
7. Keep clear of load while lifting and lowering.
8. Lower load slowly.
9. Do not use for aircraft purposes.
10. Inspect before every use;
do not use if parts loose or damaged.
11. Keep your work area clean and well lit.
Cluttered work areas invite accidents.
12. Keep bystanders, children, and visitors
away while operating Jack.
13. Stay alert. Watch what you are doing, and
use common sense when operating a Jack.
Do not use a Jack while tired or under the
influence of drugs, alcohol, or medication.

Page 3For technical questions, please call 1-888-866-5797.Item 58816
SAFETYOPERATIONMAINTENANCE SETUP
14. Jack service must be performed only by
qualified repair personnel. Service or
maintenance performed by unqualified
personnel could result in a risk of injury.
15. When servicing a Jack, use only identical
replacement parts. Follow instructions in
the “Cleaning, Maintenance and Lubrication”
section of this manual. Use of unauthorized
parts or failure to follow maintenance
instructions may create a risk of injury.
16. Maintain labels and nameplates on the
Jack. These carry important information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
17. Industrial applications must follow
OSHA requirements.
18. The warnings, precautions, and instructions
discussed in this manual cannot cover all
possible conditions and situations that may occur.
The operator must understand that common sense
and caution are factors which cannot be built into
this product, but must be supplied by the operator.
19. Study, understand, and follow all instructions
before operating this device.
Air Source
1. Never connect to an air source
that is capable of exceeding
200 psi. Over pressurizing the
tool may cause bursting, abnormal
operation, breakage of the tool or
serious injury to persons. Use only clean, dry,
regulated compressed air at the rated pressure
or within the rated pressure range as marked on
the tool. Always verify prior to using the tool that
the air source has been adjusted to the rated air
pressure or within the rated air-pressure range.
2. Never use oxygen, carbon dioxide, combustible
gases or any bottled gas as an air source
for the tool. Such gases are capable of
explosion and serious injury to persons.
Symbol Definitions
Symbol Property or statement
PSI Pounds per square inch of pressure
CFM Cubic Feet per Minute flow
SCFM Cubic Feet per Minute flow
at standard conditions
NPT National pipe thread, tapered
Symbol Property or statement
WARNING marking
concerning Risk of Eye Injury.
Wear ANSI-approved eye protection.
WARNING marking concerning Risk of
Hearing Loss. Wear hearing protection.
WARNING marking concerning
Risk of Respiratory Injury. Wear
NIOSH-approved dust mask/respirator.
WARNING marking concerning
Risk of Explosion.
SAVE THESE INSTRUCTIONS.

Page 4 For technical questions, please call 1-888-866-5797. Item 58816
SAFETY OPERATION MAINTENANCESETUP
Initial Tool Set Up
Read the ENTIRE IMPORTANT SAFETY INSTRUCTIONS section at the beginning of this
manual including all text under subheadings therein before set up or use of this product.
Components and Controls
Oil Fill Plug
Handle
Bracket
Release Valve
Handle
Air Lever
Air Inlet
Ram
Air Motor

Page 5For technical questions, please call 1-888-866-5797.Item 58816
SAFETYOPERATIONMAINTENANCE SETUP
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual
including all text under subheadings therein before set up or use of this product.
Mounting
WARNING! TO PREVENT SERIOUS
INJURY: Install ONLY on device designed
for a Jack with the same rating:
• A device designed for a Jack with
a higher rating may damage the Jack
or cause it to suddenly fail under load.
• A device designed for a Jack with a lower rating
may be damaged or may suddenly fail under load.
WARNING! TO PREVENT SERIOUS INJURY:
Mount properly as part of a device designed for
this type of Jack before use.
Mounting points, maximum length, and rating
must be IDENTICAL. Do not mount on different
device or use while not mounted properly.
Note: Do not mount upside-down.
Note: Jack must have load on Ram to retract.
WARNING! TO PREVENT SERIOUS INJURY:
Only use pins that are capable of supporting the rated
load, and ensure that the pins are properly secured before
use. Make sure the pins’ diameters are a push fit
with just enough clearance so they move freely.
Secure the Base to the device:
1. Insert a pin (not included) through the holes in the
Round Base and in the device, properly securing it.
2. Insert another pin (not included) through
the device and Ram Pin Hole.
3. Secure pins in place with appropriate retaining
rings or cotter pins (both sold separately).
Bleeding
IMPORTANT! Before first use, check for proper
hydraulic oil level in the Jack.
Then thoroughly test the Jack for proper operation
prior to its actual use. If the Jack appears not
to be working properly, it may be necessary to
bleed its hydraulic system of excess air.
1. Remove Oil Fill Plug.
2. Turn Release Valve counterclockwise.
3. Insert Handle into Handle Bracket.
4. Apply pressure to the lifting point, and
pump Handle quickly several times.
5. Check the Oil Fill Hole and, if necessary,
top off the Oil Fill Hole with hydraulic oil.
6. Replace Oil Fill Plug.
7. Test the Jack several times for proper operation
before attempting to lift a load.
If, after purging, the Jack still does not
appear to be working properly, do not
use the Jack until it has been repaired
by a qualified service technician.
8. Remove Fill Plug. Fill with hydraulic fluid
(sold separately) to full level, if necessary.
9. Place slotted end of Jack Handle over the
Release Valve, then turn counterclockwise
to open Release Valve.
10. Insert Jack Handle into Handle Bracket,
apply downward pressure to the Ram, then
pump Handle quickly several times.
11. Check fluid level and, if necessary,
top off with hydraulic fluid.
12. Close Release Valve by turning it
clockwise, then replace Fill Plug.
IMPORTANT: After bleeding the Jack, test the
Jack for proper operation prior to its actual use.
13. If, after bleeding, the Jack does not appear
to be working properly, do not use it until
repaired by a qualified service technician.

Page 6 For technical questions, please call 1-888-866-5797. Item 58816
SAFETY OPERATION MAINTENANCESETUP
Air Supply
TO PREVENT SERIOUS INJURY FROM EXPLOSION:
Use only clean, dry, regulated, compressed air to power this tool. Do not use oxygen,
carbon dioxide, combustible gases, or any other bottled gas as a power source for this tool.
1. Incorporate a filter, regulator with pressure gauge,
oiler, in-line shutoff valve, and quick coupler for best
service, as shown on Figure A: Portable Air Supply
Setup on page 8 and Figure B: Stationary Air
Supply Setup on page 9. An in-line shutoff
ball valve is an important safety device because
it controls the air supply even if the air hose
is ruptured. The shutoff valve should be a
ball valve because it can be closed quickly.
Note: If an automatic oiler system is not used,
add a few drops of Pneumatic Tool Oil to
the airline connection before operation.
Add a few more drops after each hour of continual use.
2. Attach an air hose (not included) to the
compressor’s air outlet.
Connect the air hose to the Jack’s Air Inlet.
Other components, such as a connector
and quick coupler, will make operation
more efficient, but are not mandatory.
WARNING! TO PREVENT SERIOUS INJURY
FROM ACCIDENTAL OPERATION:
Do not install a female quick coupler on the tool.
Such a coupler contains an air valve that will
allow the air tool to retain pressure and operate
accidentally after the air supply is disconnected.
Note: Air flow, and therefore tool performance, can
be hindered by undersized air supply components.
The air hose must be long enough to reach
the work area with enough extra length to
allow free movement while working.
3. Close the in-line shutoff valve between
the compressor and the tool.
4. Turn on the air compressor according to
the manufacturer’s directions and allow it
to build up pressure until it cycles off.
5. Adjust the air compressor’s output regulator
so that the air output is enough to properly
power the tool, but the output will not exceed
the tool’s maximum air pressure at any time.
Adjust the pressure gradually, while checking the
air output gauge to set the right pressure range.
6. Inspect the air connections for leaks.
Repair any leaks found.
7. If the tool will not be used at this time, turn off
and detach the air supply, safely discharge any
residual air pressure, and release the throttle
to its off position to prevent accidental operation.
Note: Residual air pressure should not be present
after the tool is disconnected from the air supply.
However, it is a good safety measure to attempt to
discharge the tool in a safe fashion after disconnecting
to ensure that the tool is disconnected and unpowered.

Page 7For technical questions, please call 1-888-866-5797.Item 58816
SAFETYOPERATIONMAINTENANCE SETUP
Raising and Lowering
Note: If the tool requires more force to accomplish
the task, verify that the tool receives sufficient,
unobstructed airflow (CFM) and increase the
pressure (PSI) output of the regulator up to the
maximum air pressure rating of this tool.
CAUTION! TO PREVENT INJURY FROM
TOOL OR ACCESSORY FAILURE:
Do not exceed the tool’s
maximum air pressure rating.
If the tool still does not have sufficient force
at maximum pressure and sufficient airflow,
then a larger tool may be required.
1. Manual Operation:
a. Place Jack Handle into Handle Bracket.
b. Pump Handle until Jack reaches desired height.
c. Remove Jack Handle.
2. Pneumatic Operation:
a. Connect the compressor’s air
hose to the Air Inlet.
b. Press Air Lever until Jack reaches desired height.
3. To lower, place slotted end of Jack Handle
over Release Valve and slowly turn the
Release Valve counterclockwise.

Page 8 For technical questions, please call 1-888-866-5797. Item 58816
SAFETY OPERATION MAINTENANCESETUP
Figure A: Portable Air Supply Setup
G
A
E
E
H
F
B
Non-lubricated Tools Lubricated Tools
A
B
C
C
DA
Description Function
A Air Hose Connects air to tool B Filter Prevents dirt and condensation from damaging tool or workpiece
C Regulator Adjusts air pressure to tool D Lubricator (optional) For air tool lubrication
E Coupler and Plug Provides quick connection and release
F Leader Hose (optional) Increases coupler life
G Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
H Air Adjusting Valve (optional) For fine tuning airflow at tool

Page 9For technical questions, please call 1-888-866-5797.Item 58816
SAFETYOPERATIONMAINTENANCE SETUP
Figure B: Stationary Air Supply Setup
N
L
L O
M
C C
Non-lubricated Tools
Lubricated Tools
H
I
I
J
JKH
F
G
E
Slope
F
F
B
B
A
A
CD
Description Function
A Vibration Pads For noise and vibration reduction B Anchor Bolts Secures air compressor in place
C Ball Valve Isolates sections of system for maintenance D Isolation Hose For vibration reduction
E Main Air Line - 3/4″ minimum recommended Distributes air to branch lines
F Ball Valve To drain moisture from system
G Branch Air Line -1/2″ minimum recommended Brings air to point of use
H Air Hose Connects air to tool
I Filter Prevents dirt and condensation from damaging tool or workpiece
J Regulator Adjusts air pressure to tool
K Lubricator (optional) For air tool lubrication
L Coupler and Plug Provides quick connection and release
M Leader Hose (optional) Increases coupler life
N Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
O Air Adjusting Valve (optional) For fine tuning airflow at tool

Page 10 For technical questions, please call 1-888-866-5797. Item 58816
SAFETY OPERATION MAINTENANCESETUP
Maintenance Instructions
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Turn off the tool, detach the air supply, safely discharge any residual air pressure
in the tool, and release the throttle and/or turn the switch to its off position before
performing any inspection, maintenance, or cleaning procedures.
TO PREVENT SERIOUS INJURY FROM TOOL FAILURE:
Do not use damaged equipment. If abnormal noise, vibration,
or leaking air occurs, have the problem corrected before further use.
Cleaning, Maintenance, and Lubrication
1. BEFORE EACH USE, inspect the general
condition of the tool. Check for:
• loose hardware or housing,
• misalignment or binding of moving parts,
• damaged air hose,
• cracked or broken parts, and
• any other condition that may
affect its safe operation.
2. BEFORE EACH USE, thoroughly test the
Jack for proper operation prior to its actual
use. If the Jack appears not to be working
properly, follow Bleeding on page 5.
3. DAILY - Air Supply Maintenance:
Every day, maintain the air supply according
to the component manufacturers’ instructions.
Drain the moisture filter regularly.
Performing routine air supply maintenance
will allow the tool to operate more safely
and will also reduce wear on the tool.
4. AFTER USE, clean external surfaces of
the Jack with a clean, moist cloth and a
mild detergent. Do not use solvents.
5. WHEN STORING, turn Release Valve
counterclockwise to its open position. Store the
Jack in a clean, dry, safe location out of reach
of children and other unauthorized people.
6. ONCE OR TWICE A MONTH, lubricate the air
motor with good quality hydraulic fluid. Add oil
through the air valve while holding down the lever.
7. PERIODICALLY, check the condition
of the hydraulic fluid. Change the
hydraulic fluid as needed :
a. With the Jack fully retracted, remove the Fill Plug.
b. Tip the Jack over to allow the old hydraulic fluid to
drain out completely. Dispose of the old hydraulic
fluid in accordance with local regulations.
c. With the Jack upright, completely fill the
Reservoir with high grade hydraulic fluid until
the oil is 1/4" below the top of the Fill Port.
d. Place the slotted end of the Jack Handle
over the Release Valve, then turn
counterclockwise to open the Release Valve.
e. Pump the Handle quickly several times
to purge air from the system.
f. Recheck fluid level and re-fill as needed.
g. Thoroughly bleed jack after changing fluid
according to Bleeding on page 5.

Page 11For technical questions, please call 1-888-866-5797.Item 58816
SAFETYOPERATIONMAINTENANCE SETUP
Troubleshooting
TO PREVENT SERIOUS INJURY AND DEATH:
Use caution when troubleshooting a malfunctioning Jack. Stay well clear of the supported load. Completely
resolve all problems before use. If the solutions presented in the Troubleshooting guide do not solve the
problem, have a qualified technician inspect and repair the Jack before use.
After the Jack is repaired: Test it carefully without a load by raising and lowering it fully,
checking for proper operation, BEFORE RETURNING THE JACK TO OPERATION.
DO NOT USE A DAMAGED OR MALFUNCTIONING JACK!
Problem Possible Causes Possible Solution
Jack will not lift load. 1. Release Valve not tightly closed.
2. Overload condition.
3. Air supply inadequate.
4. Air trapped in system.
1. Close Release Valve firmly.
2. Do not exceed 8 ton lifting capacity.
3. Ensure adequate air supply.
4. Purge air from system.
Jack will lift, but will not maintain
pressure.
1. Release Valve not tightly closed.
2. Overload condition.
3. Hydraulic unit malfunction
or defective seals.
1. Close Release Valve firmly.
2. Do not exceed 8 ton lifting capacity.
3. Have a qualified service technician
check the hydraulic unit.
Jack will not lower after it is
raised.
1. Reservoir overfilled.
2. Linkages binding.
1. Drain oil to proper level.
2. Clean and lubricate moving parts.
Poor lift performance. 1. Hydraulic oil level low.
2. Air trapped in system.
1. Add oil to proper level.
2. Purge air from system.
Will not lift to maximum height. Hydraulic oil level low. Add oil to proper level.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS
QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE
ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND
LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS
THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.

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SAFETY OPERATION MAINTENANCESETUP
Parts List and Diagram
Parts List
Part Description Qty
1Base 1
2Steel Ball 5
3Ball Seat 1
4Spring 1
5Screw 1
6O-Ring 1
7Screw 1
8Decorative Cap 1
9Steel Ball 6
10 Steel Ball 2
11 Spring 2
12 Copper Washer 2
13 Screw 2
14 Seal 1
15 Release Valve 1
16 Oil Filter Screen 2
17 Spring 1
18 Steel Ball 1
19 Copper Washer 2
20 Base for Pump Piston 1
21 O-Seal Ring 1
22 Nylon Retaining Ring 1
23 Back-Up Ring 1
24 Pump Piston 1
Part Description Qty
25 Pin 3
26 Connector 1
27 R-Pin 1
28 Handle Bracket 1
29 Cotter Pin 2
30 Handle 1
31 Air Motor 1
32 Rotary Joint 1
33 Air Hose 1
34 Air Valve 1
35 Air Pipe Connector 1
36 Nylon Ring 1
37 Cylinder 1
38 O-Ring 1
39 Cup Seal 1
40 Ram Assembly 1
41 Spacing Ring 1
42 O-Ring 1
43 Reservoir 1
44 Filler Plug 1
45 Nylon Washer 1
46 Top Nut 1
47 O-Ring 1
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available individually as
replacement parts. Parts may not be interchangeable. Specify UPC 193175447142 when ordering parts.

Page 13For technical questions, please call 1-888-866-5797.Item 58816
SAFETYOPERATIONMAINTENANCE SETUP
Assembly Diagram
1
2
3
4
5
6
7
8
9
9
10
10
11
12
13
11
12
13
9
14
15
16
16
9
17
18
19
19
20
21
22
23
24
25
25
26
27
28 29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

Page 14 For technical questions, please call 1-888-866-5797. Item 58816
SAFETY OPERATION MAINTENANCESETUP
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.

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SAFETYOPERATIONMAINTENANCE SETUP

26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797