Williams 3M05T75 Owner's manual

Printed in Taiwan
Model: 3M10T160 & 3M20T160
Model: 3M05T75 & 3M05T150
3M05T75-M0_062017
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.
!
Mini Jacks
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820
MODELS: 3M05T75, 3M05T150 - 5 Ton Capacity
3M10T160 - 10 Ton Capacity
3M20T160 - 20 Ton Capacity
OWNER/ OPERATOR MANUAL
CAPACITY: 5 TO 20 TONS
(Max. Operating Pressure 10,000 PSI)

Save these instructions. For your safety, read, understand,
and follow the information provided with and on this jack
before using. The owner and/or operator of this equipment
shall have an understanding of this jack and safe operating
procedures before attempting to use. The owner and/or
operator shall be aware that the use and repair of this product
may require special skills and knowledge. Instructions and
safety information shall be conveyed in the operator's native
language before use of this jack is authorized. If any doubt
exists as to the safe and proper use of this jack, remove from
service immediately.
Inspect before each use. Do not use if broken, bent, cracked,
or damaged parts (including labels) are noted. Any jack that
appears damaged in any way, operates abnormally or is
missing parts, shall be removed from service immediately. If
you suspect that the jack was subjected to a shock load (a
load dropped suddenly, unexpectedly upon it), immediately
discontinue use until the jack has been checked by a Williams
authorized service center (contact distributor or manufacturer
for list of Authorized Service Centers). It is recommended that
an annual inspection be done by qualied personnel. Labels
and owner's manuals are available from manufacturer.
PRODUCT DESCRIPTION
This product is designed to lift, position, or move, but not
sustain, rated capacity loads. It is not designed to be used as
a stand-alone device. Any load lifted, positioned, or otherwise
moved by this device, must immediately be supported by
appropriately rated mechanical means. A wide variety of
applications exist for this category of product. Special skill,
knowledge and training may be required for a specic task and
this product may not be suitable for all jobs listed. Unsuitable
applications include applications that call for a device to
lift, position, move or support persons, animals, hazardous
materials, mobile homes and dwellings in general, mirrors,
plate glass or to connect/secure hatches, components, and
materials between bulkheads. The user ultimately must make
the decision regarding suitability of the product for any given
task and therefore accept responsibility for that decision.
HYDRAULIC JACK TECHNICAL
SPECIFICATIONS
Rated Capacity of 3M05T75, 3M05T150: 10,000 lb.
(5 ton)
Rated Capacity of 3M10T160: 20,000 lb. (10 ton)
Rated Capacity of 3M20T160: 40,000 lb. (20 ton)
Brand name: Williams
Hydraulic Pressure @ Rated Capacity:
3M05T75, 3M05T150: 7,000 psi
3M10T160: 7,850 psi
3M20T160: 10,800 psi
2
BEFORE USE
Before using this jack, ensure that the intended load contact
point is able to withstand the load applied by this jack.
1. Before using this product, read the owner’s manual completely
and familiarize yourself thoroughly with the product, its
components, and recognize the hazards associated with
its use.
2. To familiarize yourself with basic operation, use the operating
handle to engage and turn the release valve:
a. Clockwise until rm resistance is felt to further thread
engagement. This is the ‘CLOSED’ release valve
position used to pressurize the hydraulic uid and
raise the ram plunger.
b. Counter-clockwise, but no more than 1/2 turn from the
closed position. This is the ‘OPEN’ release valve
position
used to lower the ram plunger.
3. Check that the pump operates smoothly before putting into
service. Replace damaged or missing parts with factory
authorized replacement parts only. Repair of this product
may require special skills and knowledge and should only
be attempted by a factory authorized service center. Contact
the manufacturer or distributor of this product for a list of
factory authorized service centers. Lubricate as instructed
in Maintenance Section.
Bleeding/ Venting Trapped Air
With the release valve in the OPEN position (2b above) and with
saddle fully lowered, locate and remove the oil ller plug. Insert
the handle into the handle sleeve; then pump 6 to 8 full strokes.
This will help release any pressurized air which may be trapped
within the reservoir. Oil level should be even with the bottom of
the oil ller plug hole. Reinstall the oil ller plug.
Use of this device may require special skills and
knowledge. Read, understand, and follow all printed materials
provided with and on this device before use.
!
!
To avoid personal injury and/or property damage:
•Read, understand and follow all printed materials provided
with and on this jack.
•This is a lifting device only! Never work on, under, or
around a load supported only by a hydraulic jack.
•Immediately support the lifted load with appropriately
rated mechanical means.
•Use only on hard, level surfaces capable of sustaining
rated capacity loads.
•Center load on saddle.
• No alteration shall be made to this device. Use only
attachments, adapters and accessories provided by
the manufacturer.
•Be alert and sober when using this product! Never
operate this equipment when under the inuence of
drugs or alcohol.
•Use only high grade hydraulic jack oil in this product.
•Always use a calibrated means of determining how
much force is being applied by this product. Never
exceed the rated capacity of the jack.
WARNING
!

3
SPECIFICATIONS
MAINTENANCE
Important: Use only good grade hydraulic jack oil. Avoid
mixing different types of uid and NEVER use brake uid,
turbine oil, transmission uid, motor oil or glycerin. Improper
uid can cause premature failure of the jack and the potential
for sudden and immediate loss of load. We recommend
Williams 8H1G or equivalent.
Adding
1. With saddle fully lowered set jack in its upright, level
position. Locate and remove oil ller plug.
2. Fill with oil even with the bottom of the oil ller hole. Reinstall
the oil ller plug.
Changing oil
For best performance and longest life, replace the complete
uid supply at least once per year.
1. With saddle fully lowered set jack in its upright, level
position. Locate and remove oil ller plug.
2. Lay the jack on its side and drain the uid into a suitable
container.
Note: Dispose of hydraulic uid in accordance with local
regulations.
3. Fill with oil even with the bottom of the oil ller hole. Reinstall
the oil ller plug.
Lubrication
A periodic coating of light lubricating oil to pivot points will
help to ensure that pump piston linkages move freely.
Note: Never apply oil to saddle.
Cleaning
Periodically check the pump piston and ram plunger, and
saddle for signs of rust or corrosion. Clean as needed and
wipe with a clean, oil soaked rag.
Note: Never use sandpaper or abrasive material on these
surfaces !
Storage
Store the jack with pump piston, ram plunger/saddle
fully
lowered and release valve open, but never more than 1/2
turn. This will help prevent rust and corrosion to those critical
surfaces.
Figure 1 - Typical Mini Jack Components (3M05T75 shown)
OPERATION
Use of this device may require special skills and
knowledge. Read, understand, and follow all printed materials
provided with and on this device before use.
Raising the Ram Plunger
1. Locate and close release valve by turning handle
clockwise until rm resistance is felt to further thread
engagement.
2. Pump until load reaches desired height. Immediately
secure with appropriately rated mechanical devices. It
is recommended you follow the load with cribbing and
blocking where practical.
Never allow personnel to work or pass under a load
until the load is secured by cribbing, blocking, or other
mechanical means.
Lowering
Make certain that all personnel are clear of the load
before lowering. Control the rate of descent of the load at
all times. The more you open the release valve, the faster
the load descends.
1. Use the manufacturer's provided operating handle
to engage and slowly turn the release valve counter-
clockwise, but no more than 1/2 turn.
If the operating handle is damaged, operates abnormally,
or will not positively engage the release valve, immediately
discontinue use of the jack until a manufacturer's replacement
handle assembly can be acquired.
2. Push ram down and handle sleeve in to reduce exposure
to rust and contamination after removing jack from under
load.
!
!
!
!
Handle Assembly
Handle Sleeve
Saddle
Oil Filler Plug
Release Valve
Saddle Adapter
(for 3M05T75 &
3M05T150 only)
Ram Plunger
Model Capacity
(ton)
Min. Height
(in)
Max. Height
(in)
Base Size
(LxW)
Weight
(lb.)
3M05T75 5 2 3/8 3 1/8 4 1/8" x 4" 4.6
3M05T150 5 3 3/8 4 7/8 4 1/8" x 4" 5.3
3M10T160 10 4 3/4 6 1/4 4 7/8" x 4 3/8" 12.6
3M20T160 20 5 1/8 6 3/4 5 3/8" x 4 3/4" 16.7

4
(refer to page 5 for parts list)
Note: To insure safe and reliable performance, replace worn or damaged parts with Williams
authorized replacement parts only.
Note: Not all components of the cylinder are replacement items, but are illustrated as a convenient reference of location and
position in the assembly sequence. To ensure safe and reliable performance, replace worn or damaged parts with Williams
authorized repair parts only.
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820
1-866-460-7995
PARTS ILLUSTRATION
MODEL: 3M05T75 & 3M05T150

Item Model 3M05T75 Model 3M05T150 Description Qty.
1 115-6-1103-104 115-6-1103-104 Saddle 1
2 115-6-1110-101 115-6-1110-101 Retaining Ring 2
3 115-6-1810-109 115-6-1810-109 Upper Bearing 1
4 580-7-0270-101 581-7-0268-000 Dust Seal 1
5 N/A N/A Ram Plunger 1
6 * * Back-up Ring 1
7 * * U-cup 1
8 599-7-0360-002 599-7-0360-002 Special Washer 1
9 N/A N/A Base Assy. 1
10 505-9-0092-207 505-9-0092-207 Oil Filler Plug 1
11 115-3-1700-104 115-3-1700-104 Release Valve 1
12 * * Oil Seal 1
13 601-7-0006-005 601-7-0008-009 Steel Ball 2
14 511-2-0052-001 512-2-0061-009 Spring 1
15 115-6-1603-104 115-6-1603-104 Screw 1
16 * * O-ring 1
17 * * Back-up Ring 1
18 115-6-1306-108 115-6-1306-108 Pump Piston 1
19 115-4-2100-101 115-4-2100-101 Handle 1
20 518-4-0060-102 518-4-0060-102 Pin 2
21 115-4-1300-104 115-4-1300-104 Handle Sleeve 1
22 677-5-0050-105 677-5-0050-105 “E” Clip 2
23 414-6-1216-107 414-6-1216-107 Needle 1
24 512-2-0067-010 512-2-0067-010 Safety Spring 1
25 * * O-ring 1
26 414-6-1215-307 414-6-1215-307 Safety Valve Screw 1
27 509-9-0145-109 509-9-0145-109 Safety Valve Cap 2
28 649-1-0080-027 649-1-0080-027 Socket Head Bolt 1
29 * * Gasket 1
30 511-2-0048-000 511-2-0048-000 Spring 1
31 115-6-1104-106 115-6-1104-106 Saddle Adapter 1
(*) 115-3-9901-104 115-3-9901-104 Repair Kit -
5
(*) - Indicates items included in, and available only as part of Repair Kit.
N/A - Part is not available as replacement.
Note: Not all components of the cylinder are replacement items, but are illustrated as a convenient reference of location and
position in the assembly sequence. To ensure safe and reliable performance, replace worn or damaged parts with Williams
authorized repair parts only.
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820
1-866-460-7995
REPAIR PARTS SHEET
MODEL: 3M05T75 & 3M05T150

6
(refer to page 7 for parts list)
Note: To insure safe and reliable performance, replace worn or damaged parts with Williams
authorized replacement parts only.
Note: Not all components of the cylinder are replacement items, but are illustrated as a convenient reference of location and
position in the assembly sequence. To ensure safe and reliable performance, replace worn or damaged parts with Williams
authorized repair parts only.
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820
1-866-460-7995
PARTS ILLUSTRATION
MODEL: 3M10T160 & 3M20T160

Item Model 3M10T160 Model 3M20T160 Description Qty.
1 125-6-1103-102 135-6-1103-100 Saddle 1
2 A24-6-4302-107 430-6-4302-406 Retaining Ring 1
3 125-6-1808-100 226-6-1808-106 Retaining Ring 1
4 * * O-ring 1
5 125-6-1204-108 135-6-1204-106 Dust Seal 1
6 * * O-ring 1
7 N/A N/A Ram Plunger 1
8 125-6-1209-108 135-6-1209-106 Ram Bearing 1
9 * * Back-up Ring 1
10 * * U-cup 1
11 N/A N/A Base Assy. 1
12 505-9-0092-207 505-9-0092-207 Oil Filler Plug 1
13 238-6-1701-403 238-6-1701-403 Release Valve 1
14 * * Oil Seal 1
15 511-2-0052-001 512-2-0052-008 Spring 1
16 115-6-1603-104 115-6-1603-104 Screw 1
17 * * O-ring 1
18 * * Back-up Ring 1
19 125-6-1306-106 125-6-1306-106 Pump Piston 1
20 518-4-0080-016 518-4-0080-016 Pin 2
21 125-4-1300-102 125-4-1300-102 Handle Sleeve 1
22 677-5-0070-101 677-5-0070-101 “E” Clip 2
23 125-4-2100-109 135-4-2100-107 Handle 1
24 601-7-0006-005 601-7-0006-005 Steel Ball 2
25 511-2-0048-000 511-2-0048-000 Spring 1
26 * * Gasket 1
27 649-1-0080-027 649-1-0080-027 Socket Head Bolt 1
28 509-9-0145-109 509-9-0145-109 Safety Valve Cap 2
29 414-6-1215-307 414-6-1215-307 Safety Valve Screw 1
30 * * O-ring 1
31 512-2-0067-010 512-2-0067-010 Spring 1
32 414-6-1216-107 414-6-1216-107 Needle 1
(*) 125-3-9901-102 135-3-9901-100 Repair Kit -
7
(*) - Indicates items included in, and available only as part of Repair Kit.
N/A - Part is not available as replacement.
Note: Not all components of the cylinder are replacement items, but are illustrated as a convenient reference of location and
position in the assembly sequence. To ensure safe and reliable performance, replace worn or damaged parts with Williams
authorized repair parts only.
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820
1-866-460-7995
REPAIR PARTS SHEET
MODEL: 3M10T160 & 3M20T160

8
Possible Causes Corrective Action
Jack will not pressurize
Jack *bleeds off after lift
* 'bleeds off' means load slowly and
unintentionally lowers after lifting
While lowering, uid leaks from res-
ervoir area
Jack saddle will not descend to low-
est advertised height
Ram plunger will not remain lowered
after released from contact with load
(creeps back up)
Poor lift performance
Will not lift to full extension
• Release valve not tightly closed
• Load is too heavy
• Hydraulic unit malfunction
• Reservoir overlled
• Ram plunger/cylinder deformed,
seized up in ram cylinder and/or
top nut, likely the result of off-
center loading
• Air trapped in system
• Fluid level low
• Air trapped in system
• Hydraulic unit malfunction
• Fluid level low
• Ensure release valve tightly closed
• Consider higher capacity jack
• Contact Service Center
• Drain uid to proper level
• Contact Service Center
• Follow the Owners Manual instructions
for bleeding air from system.
• Ensure proper uid level
• Follow the Owners Manual instructions
for bleeding air from system.
• Contact Service Center
• Ensure proper uid level
TROUBLESHOOTING
Symptom
LIMITED LIFETIME WARRANTY
J.H. Williams Tool Group warrants this product to be free from defects in material and workmanship for the life of the product as
long as the original purchaser owns the product. The warranty is non-transferable and is subject to the terms, exclusions, and
limitations described below:
• Damaged components, including but not limited to bent rams, dented or crushed cylinder walls, broken welds or couplers as
well as worn out seals, o-rings and springs are the result of misuse and not covered by warranty and Williams will not provide
any warranty credit for such damaged components.
• This warranty does not cover ordinary wear and tear, overloading, alterations (including repairs or attempted repairs not performed
by Williams or one of its authorized personnel), improper uid use, or use of the product in any manner for which the product was
not intended or the use of which is not in accordance with the instructions or warnings provided with the product.
• In the unlikely event that a Williams product fails due to material defect in workmanship, you may contact J.H. Williams Tool
Group for disposition. In such cases, the customer’s sole and exclusive remedy for any breach or alleged breach of warranty
is limited to the repair or replacement of the defective product.
• Under no circumstances is Williams liable for any consequential or incidental damage or loss whatsoever.
• THIS WARRANTY IS LIMITED TO NEW PRODUCTS SOLD THROUGH AUTHORIZED DISTRIBUTORS AND OTHER
CHANNELS DESIGNATED BY WILLIAMS. NO AGENT, EMPLOYEE OR OTHER REPRESENTATIVE OF WILLIAMS IS
AUTHORIZED TO MODIFY THIS WARRANTY.
• THE FOREGOING IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES, INCLUDING
BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FOR A FITNESS FOR A PARTICULAR
PURPOSE.
• Components not manufactured by Williams including certain motor systems, gasoline engines, and other are not covered by this
warranty and instead are covered by the manufacturer’s separate manufacturer’s warranty provided in the package.
• Williams’ liability in all cases is limited to, and will not exceed the purchase price paid for the product.
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820