Williams 5G55H5G Owner's manual

Printed in Taiwan
Maximum Operating Pressure 10,000 PSI
5G55H5G-M0_072017
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.
!
!WARNING
The engine exhaust from this product contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive harm.
Gas Engine Pumps
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820
MODELS 5G55H5G & 5G102H5G
(Max. Operating Pressure 10,000 PSI)
OWNER/ OPERATOR MANUAL

2
SAFETY AND GENERAL INFORMATION
Save these instructions. For your safety, read and understand the information contained within. The owner and operator shall
have an understanding of this product and safe operating procedures before attempting to use this product. Make certain that the
operator thoroughly understands the inherent dangers associated with the use and misuse of the product. If any doubt exists as
to the safe and proper use of this product as outlined in this factory authorized manual, remove from service immediately.
Inspect before each use. It is recommended that, prior to each use, an inspection be done by qualied personnel and that
any missing or damaged parts, decals, warning / safety labels or signs be replaced with factory authorized replacement parts
only. Any pump that appears to be damaged in any way, is worn, leaking or operates abnormally shall be removed from service
immediately until such time as repairs can be made. Any pump that has been or suspected to have been subject to a shock load
(a load dropped suddenly, causing the system pressure to exceed 10,000 PSI), shall be removed from service immediately until
checked by qualied personnel. Owners and operators of this equipment shall be aware that the use and subsequent repair of
this equipment may require special training and knowledge.
PRODUCT DESCRIPTION
Williams Hydraulics Gas Engine Pump is engineered to meet most industrial standards for Performance and Safety. These
pumps provide hydraulic power when electricity and air power are not available. These pumps supply compressed hydraulic uid
to compatible applications i.e. rams, presses, spreaders, compactors and crimping machines, anywhere that 10,000 PSI of uid
pressure is needed. Special skill, knowledge and training may be required for a specic task and the product may not be suitable
for all the jobs described above. Unsuitable applications would include applications that call for a device to move, level or support
persons, animals, hazardous materials, mobile homes/ dwellings in general, mirrors and/or plate glass, and/or to connect/secure
hatches, components, etc. between bulkheads. The user must make the decision regarding suitability of the product for any given
task and assume the responsibility of safety for himself and others in the work area.
NOTICE: Please refer to gas engine owner's manual for engine information.
WARNING: To reduce the risk of personal injury and/or property damage, ensure that the rated working pressure of each
pressurized attachment be equal to or greater than the rated working pressure developed by the hydraulic pump.
CAUTION: Always check connections before using. Alteration of these products is strictly prohibited. Use only those
adapters, attachments and accessories provided and approved by the manufacturer.
!
!
Figure 1 - Model 5G55H5G Components
Control Valve Lever
Oil Dipstick Cap
Frame
Hydraulic Oil Cap
(not shown, located on
reservoir)
Control Valve
Oil Output Ports
3/8"-18NPTF
Carry Handle
Drain Plug
Hydraulic Oil Reservoir
Engine Starter Grip
Fuel Cap Gas Engine

3
SPECIFICATIONS
Model
Number
Usable Oil
Capacity
(gal)
Pressure Rating
(psi)
Output Flow Rate
(in3/min) Valve Type Motor
Mfr
Motor
Size
(hp)
Output
Port
Threads
Weight
(lb)
1st Stg 2nd Stg 1st Stg 2nd Stg
5G55H5G
5
700 10,000 700 100
Manual, 4-way,
3-position Honda 5.5 3/8"- 18NPT 121
5G102H5G 10.2
BEFORE USE
1. Visually inspect all components for shipping damage. Do not use if any damaged parts are found.
NOTICE: Gas Pump is shipped without hydraulic oil. Add oil before operating.
2. Familiarize yourself with the specications and illustrations in this owners manual. Many malfunctions in new equipment are
the result of improper operation and/or improper set-up assembly. Know your pump, its limitations and how it operates before
attempting to use. Refer to specication chart and gure 1 on page 2 for details of oil port thread size, usable oil capacity and
more. Read and follow all instructions carefully.
WARNING: Maximum working pressure is 10,000 PSI. All hydraulic equipments such as cylinders, hoses, couplers and
etc. used with this pump shall be rated at or above 10,000 PSI operating pressure.
Hydraulic Connections:
1. Use only hydraulic oil specied by the manufacturer. Check and make sure the oil level in reservoir is at about 2" from top of
reservoir plate, with cylinder retracted and motor off.
2. Use of pressure gauge is strongly recommended. Attach pressure gauges between the pump and cylinder, these gauges permit
the operator to monitor pressure on cylinder.
3. Make sure couplers, hoses, valve and gauges are tighten securely to prevent accidental removal of components while in use.
Hoses shall not be kinked or twisted.
NOTICE: Always secure threaded port connections with non-hardening pipe thread compound. Take care not to introduce
compound into port orices.
4. Do not exceed the rated capacity of the equipment connected to the pump. Use larger capacity of cylinders if necessary.
!
!
WARNING: There are hazards associated with the use of this equipment which can only be avoided by reading, understanding
and following all the printed materials provided by the manufacturer of the gasoline engine which drives this hydraulic pump.

4
• Read, understand, and follow all
instructions provided with and on this
device before use.
• All WARNING statements must be
carefully observed to help prevent
personal injury.
• No alteration shall be made to this
device.
• Always wear protective gear when
operating hydraulic equipment. Tie up
long hair, wear eye and ear protection,
and nonslip foot wear.
• Keep hydraulic equipment away from
ames and heat. Hydraulic uid can ignite
and burn. Do not operate if leaks are
detected.
• Crush Hazard. Keep hands and feet away
from loading area. Avoid pinch points or
crush points that can be created by the
load, cylinder, or system components.
• To avoid crushing and related injuries:
NEVER work on, under or around a
lifted load before it is supported by
appropriate mechanical means. Never
rely on hydraulic pressure alone to
support load.
HYDRAULIC PUMPS
•
The user must be a qualied operator familiar with the
correct operation, maintenance, and use of pumps. Lack of
knowledge in any of these areas can lead to personal injury.
• Do not exceed rated capacity of the pump or any equipment
in the system.
• Never attempt to lift a load weighing more than the capacity
of the output device (cylinder, spreader etc.)
• Do not subject pump and its components to shock loads.
• Burst hazard exists if hose or connection pressure exceeds
rated pressure.
• Inspect pump, cylinder, hoses and connections before each
use to prevent unsafe conditions from developing. Do not
use if they are damaged, altered or in poor condition. Do
not operate the system with bent or damaged coupler or
damaged threads.
• Never hold or stand directly in line with any hydraulic
connections while pressurizing.
• ALWAYS
use gauge or other load measuring instrument to
verify load.
• Never attempt to disconnect hydraulic connections under
pressure. Release all line pressure before disconnecting
hoses.
!WARNING
• Do not operate this device in an extreme temperature,
explosive atmosphere or in the presence of conductive
liquids.
• Always inspect hoses and connections for damage prior
to use.
• Ensure the device is placed on a hard, level surface.
• Ensure that application is stable to work on and around.
• Use only approved accessories and approved hydraulic uid.
• Never attach ANY component not authorized by manufacturer.
• Do not connect to application which can return more oil to
the reservoir than the pump reservoir can hold.
• Do not connect pump to hydraulic system powered by
another pump.
• This device is not suitable for use as support device! As
the system load is lifted, use blocking and cribbing to guard
against a falling load.
• All personnel must be clear before lowering load or
depressurizing the system.
• Never try to disassemble a hydraulic pump, refer repairs to
qualied, authorized personnel.
HYDRAULIC HOSES & FLUID TRANSMISSION LINES
• Avoid short runs of straight line tubing. Straight line runs
do not provide for expansion and contraction due to
pressure and/or temperature changes.
• Reduce stress in tube lines. Long tubing runs should be
supported by brackets or clips. Before operating the pump,
tighten all hose connections with proper tools. Do not
overtighten. Connections should only be tightened securely
and leak-free. Overtightening can cause premature thread
failure or high pressure ttings to burst.
• Should a hydraulic hose ever rupture, burst or need to be
disconnected, immediately shut off the pump and release
all pressure. Never attempt to grasp a leaking pressurized
hose with your hands. The force of escaping hydraulic uid
can inict injury.
• Do not subject the hose to potential hazard such as re,
sharp objects, extreme heat or cold, or heavy impact.
• Do not allow the hose to kink, twist, curl, crush, cut or bend
so tightly that the uid ow within the hose is blocked or
reduced. Periodically inspect the hose for wear.
• Do not pull, position or move setup by the hose.
• Hose material and coupler seals must be compatible with
hydraulic uid used. Hoses also must not come in contact
with corrosive materials such as battery acid, creosote-
impregnated objects and wet paint. Never paint a coupler
or hose.
• FAILURE TO HEED THESE WARNINGS MAY RESULT
IN PERSONAL INJURY AS WELL AS PROPERTY
DAMAGE.

5
OPERATION
WARNING: ALWAYS monitor pressure, load or position using suitable equipment. Pressure may be monitored by means
of an optional manifold and gauge (contact Williams Hydraulics). Load may be monitored by means of a load cell and digital
indicator. Correct application position can only be determined by the operator of the equipment.
1. Check all system ttings and connections to be sure they are tight and leak free.
2. Check the engine oil level. Please refer to engine owner's manual.
3. Before starting the pump, always place the control valve lever in the middle (Neutral/Hold) position to prevent accidental lifting
or moving of load.
4. To start engine, refer to engine owner's manual.
5. Let the pump idle for a few minutes before put into operation.
6. Use the control valve lever to control the direction of uid ow. This gas engine pump is equipped with a 4-way 3-position valve.
Refer to gure 3(a) below for the ow path.
NOTICE: Do not continue to operate pump after cylinder plunger is fully extended or retracted.
7. To stop the engine, refer to engine owner's manual.
8. Depressurize all connections before disconnect.
NOTICE: Control valve on this pump is 4-way, 3-position valve type, for use with double-acting cylinders. If your application require
a 3-way setting for single-acting cylinder as shown in Figure 3(b), it can be changed by an authorized Williams Service Center.
If you have any doubt, please contact Williams Technical Service 800-706-9208.
MAINTENANCE
1. For gas engine, please refer to engine owner's manual.
2. Inspect hoses and connections daily. Replace damaged components immediately with Williams Hydraulics replacement parts only.
3. Tighten connections as needed. Use non-hardening pipe thread compound when servicing connections.
4. Check hydraulic oil level every 40 hours of operation. Add hydraulic oil if necessary.
5. Completely change the hydraulic oil every 300 hours of operation. Change the oil more frequently when pump is used in
an extremely dusty environment or when the oil has been overheated. Use only good quality hydraulic oil. We recommend
Williams 8H1G.
Adding Hydraulic Fluid
1. Make sure engine is OFF.
2. Depressurize and disconnect from application.
3. Remove oil cap located on top plate of reservoir.
4. Use a funnel to ll reservoir to about 2" from top of reservoir plate.
5. Wipe up any spilled uid and reinstall the oil cap.
!
Position 1: Pressurized oil
ows to port A, port B returns
ow to reservoir
Position 3: Pressurized oil
ows to port B, port A returns
ow to reservoir.
Position 2: Neutral, ports
A and B are closed. Hold
Position.
Port A Port B Port A Port B Port A Port B
P R P R P R
(a) 4-Way, 3-Position Valve for Double Acting Cylinder
Position 1 (Advance): Pres-
surized oil ows to port A.
Position 3 (Retract): Port A
returns ow to reservoir.
Position 2 (Hold): Neutral, port
A is closed. Hold Position.
Port A Port A Port A
(b) 3-Way, 3-Position Valve for Single Acting Cylinder
P R P R P R
Figure 3 - Flowpath of the valve positions
and operations.
Port A Port B
1
2
3

6
Item Part No. Description Qty
1 E55-4-9000-101 Gas Engine, 5.5hp 1
2 E55-3-3007-109 Adapter Flange 1
3 649-1-0079-132 Socket Head Bolt 4
4 #a E55-4-3011-106 Shaft Adapter 1
5 E05-6-9002-107 Gasket, Motor 1
6 E10-6-9003-102 Reservoir Plate 1
7 E05-6-9004-101 Gasket, Reservoir 1
8 E55-4-3000-101 Upper Plate Assy 1
9 649-1-0095-204 Socket Head Bolt 4
10 E30-6-9006-104 Shaft 1
11 622-6-0318-203 Bearing Needle 1
12 E05-6-9007-107 Bearing 1
13 511-7-0064-109 O-ring 2
14 *a E15-4-4000-104 Piston Block 4
15 E30-4-5000-100 Lower Plate Assy 1
16 649-1-0063-403 Socket Head Screw 8
17 *b E55-4-6000-106 Gear Pump Assy 1
18 H23-6-1000-102 Magnet 1
19 E10-4-2000-109 Oil Cap 1
20 E55-3-7005-105 Frame 1
21 E55-3-9005-101 Reservoir 1
22 *c PW4 Valve Assy 1
23 #b 649-1-0060-407 Socket Head Bolt 10
24 #b 601-3-0064-106 Washer 10
25 *d E05-4-8000-106 Manifold 1
26 E05-3-9901-103 Drain Plug 1
27 532-3-0160-104 Washer 1
28 #c 653-1-0100-078 Hex Bolt, M10 x 1.5 x 40L 4
29 #c 605-3-0100-203 Washer 8
30 #c 661-2-0100-014 Nut 8
31 E05-3-9910-104 Bolt Assy for Valve (4pc.) 1
(#a) E55-3-9991-100 Bolt Assy for Engine -
(#b) E60-3-9902-108 Bolt Assy for Reservoir Plate -
(#c) E60-3-9990-101 Bolt Assy for Frame -
(*a) E05-3-9940-102 Seal Kit for Item #14 -
(*b) E05-3-9960-109 Seal Kit for Item #17 -
(*c) E05-3-9911-106 Seal Kit for Item #22 -
(*d) E05-3-9980-105 Seal Kit for Item #25 -
1
2
3
4
5
6
16
17
19
21
30
31
22
25
24
27
7
8
9
10
11
12
13
14
15
18
20
29
28
26
Note: Not all components of the kit 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
MODELS: 5G55H5G & 5G102H5G

7
TROUBLESHOOTING GUIDE
The following information is intended as an aid in determining if problem exists. Pumps should be repaired only by authorized
Williams Service Center. For repair service, contact service center in your area.
Symptom Possible Causes Corrective Action
Application does not extend, move or
respond to pressurized uid
• Overload condition
• Loose couplers
• Faulty couplers
• Pump malfunction
• Remedy overload condition
• Tighten couplers
• Replace couplers
• Contact Service Center
Pump fails to maintain pressure • External leak
• Internal hydraulic leak
• Tighten all connections
• Contact Service Center
Application responds to pressurized
uid, but system does not maintain
pressure
• Overload condition
• Pump or valve malfunction
• Application/connection leaking
• Remedy overload condition
• Contact Service Center
• Replace application/connection
Application responds slower than
normal
• Loose connection or coupler
• Restricted hydraulic line or tting
• Application/connection leaking
• Tighten connection or coupler
• Clean and replace if damaged
• Replace application/connection
Application does not return uid to
pump (i.e. cylinder will not retract)
• Malfunctioning coupler, damaged
application
• Secure load by other means.
Depressurize pump and hose, remove
coupler and/or application, then renew
or replace
Application does not fully extend
(cylinder or spreader)
• Reservoir overlled
• Fluid level in pump is low
• Secure load by other means.
Depressurize pump and hose, remove
application, then drain uid to proper
level
• Secure load by other means.
Depressurize pump and hose, remove
application, then ll uid to proper
level
Poor performance • Fluid level in pump is low • Ensure proper uid level
LIFETIME LIMITED 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 others 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.

8
Notes:
J.H. Williams Tool Group
6969 Jamesson Road,
Midland, GA 31820