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OWNERS MANUAL OWNERS MANUAL
Chief S21M
2005 © Chief Automotive Technologies
USERS MANUAL
For Series 20 / Series 30 Models Chiefs Limited One-Year
Warranty & Liability
CHIEF'S LIMITED ONE-YEAR
WARRANTY & LIABILITY
Chief Automotive Technologies, Inc. warrants for one year from date of installation
and/or purchase any of its products which do not perform satisfactorily due to defect
caused by faulty material or workmanship. Chiefs obligation under this warranty is
limited to the repair or replacement of products which are defective and which have not
been misused, carelessly handled, or defaced by repair or repairs made or attempted by
others.
CHIEF AUTOMOTIVE TECHNOLOGIES, INC. DOES NOT ASSUME
RESPONSIBILITY FOR ANY DEATH, INJURY OR PROPERTY DAMAGE
RESULTING FROM THE OPERATORS NEGLIGENCE OR MISUSE OF THIS
PRODUCT OR ITS ATTACHMENTS. CHIEF MAKES NO WRITTEN,
EXPRESS OR IMPLIED WARRANTY WHATSOEVER OF MERCHANTABIL-
ITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE
REGARDING THE EQUIPMENT OR ANY PART OF THE PRODUCT OTHER
THAN THE LIMITED ONE-YEAR WARRANTY STATED ABOVE. IMPORTANT SAFETY INSTRUCTIONS
When using your garage equipment, basic safety precautions should always be followed, including the
following:
1. Read all instructions.
2. Care must be taken as burns can occur from touching hot parts.
3. Do not operate equipment with a damaged cord or if the equipment has been dropped or
damaged - until it has been examined by a qualified service person.
4. Do not let a cord hang over the ledge of the table, bench, or counter or come in contact with
hot manifolds or moving fan blades.
5. If an extension cord is necessary, a cord with a current rating equal to or more than that of
the equipment should be used. Cords rated for less current than the equipment may
overheat. Care should be taken to arrange the cord so that it will not be tripped over or
pulled.
6. Always unplug equipment from electrical outlet when not in use. Never use the cord to pull
the plug from the outlet. Grasp plug and pull to disconnect.
7. Let equipment cool completely before putting away. Loop cord loosely around equipment
when storing.
8. To reduce the risk of fire, do no operate equipment in the vicinity of open containers of
flammable liquids (gasoline).
9. Keep hair, loose clothing, fingers and all parts of the body away from moving parts.
10. To reduce the risk of electric shock, do not use on wet surfaces or expose to rain.
11. Use only as described in this manual. Use only manufacturers recommended attachments.
12. ALWAYS WEAR SAFETY GLASSES. Everyday eyeglasses only have impact resistant
lenses, they are not safety glasses.
SAVE THESE INSTRUCTIONS
S21M
USERS MANUAL
1 S21M
USERS MANUAL
This owners manual is written to familiarize operators with the
safe and efficient operation of the S21M System. The S21M
machine features a unique multiple/simultaneous pulling
method to return the vehicles damaged structure and sheet
metal to its original position.
The S21M is available in Series 30 or Series 20 formats. Series
30 systems feature three towers at the front and up to two
optional towers at the rear. Series 20 systems feature two tow-
ers at the front and up to two optional towers at the rear. The
addition of rear towers to either system provides 360 degree
access to the vehicle. Both systems tilt hydraulically for either
drive on or winch positioning of the vehicle.
The S21M is Chiefs millennium edition. Like the S21 sys-
tem, each tower features a 10 ton hydraulic cylinder with a 10
inch stroke. The cylinders in the S21M system; however, fea-
ture a larger diameter piston.
NOTE: Illustrations shown in this manual may vary slightly
from actual product.
This manual is not intended to replace Chief Automotive
Training. For information concerning Training, contact Chief
Automotive Technologies
2
IMPORTANT:
1. DO NOT attempt to operate the S21M without first read-
ing this entire manual.
2. Complete safety information is highlighted throughout
this manual and is identified by:
This safety alert symbol identifies safety informa-
tion. Operator injury could result if these CAU-
TION notes are not followed.
3. Qualified service personnel must check operational capac-
ity of the S21M system prior to its initial use and at inter-
vals of no more than one year. Contact Chief Automotive
Technologies contact your authorized Chief Automotive
Technologies representative.
4. Persons operating the S21M repair system must be at least
18 years of age, must be trained in the operation of the
S21M system, and must have demonstrated their qualifi-
cations to the employer. They must also be specifically
assigned to operate the S21M system by the employer and
this assignment must be made in writing.
S21M
(Series 20 / Series 30 Models) S21M
USERS MANUAL
HYDRAULIC SYSTEM COMPONENTS
The S21M is powered by an electrically operated hydraulic
pump which is operated by a remote control switch. The com-
ponents of the system are identified in Figures 1a, and 1b.
Figure 1a shows a Series 30 system.
Hydraulic pressure is distributed to tower rams, auxiliary rams,
and lift ram. The flow of hydraulic fluid to these rams is con-
trolled by a valve. Hydraulic pressure is monitored by pressure
gauges mounted on the machines front towers. To exert
hydraulic pressure, press up button on hand-held switch and
to release hydraulic pressure, press down button.
3
1.
Pedestal
2.
Removable Loading Ramps
3.
Drain Plug
4.
Control Valve
5.
Joy Cord
6.
Control Switch
7.
Control Switch Assembly
8. Reservoir
9. Motor
10. Tower Valve (S21M)
Figure 1a
S21M Pump
11. Tower Ram
12. Auxiliary Ram Line Valve
13. Lift Ram Valve
14. Lift Ram
15. Pressure Gauge
16. Auxiliary Ram/Quick Coupler
Assembly
17. Emergency Stop
18. Up Button
19. Down Button
Basic Components
7
4
9
8
15
Figure 1b
12
1
11
IMPORTANT: Tower rams and auxiliary rams can
be operated either simultaneously (with equal
hydraulic pressure) or individually. The lift ram
must be operated individually. Whenever using
the hydraulic system, close all valves where
hydraulic pressure is not required.
NOTE: Although the S21M is a low pressure
system, it builds hydraulic pressure quickly. Be aware of
this quick reaction when making pulls or lifting vehicle.
10
17
18
16
14
2
13
6
5
3
19 S21M
USERS MANUAL
Figure 2
Figure 3
To operate hydraulic system:
1. Open valves to the hydraulic ram(s) to be used. Close valves
to all other hydraulic rams. (See Figures 2-4.)
NOTE: To open, turn valve 1/2 turn to left (counter-
clockwise). To close, turn valve to right (clockwise). DO
NOT overtighten. Over-tightening can damage valves
needle and seat.
IMPORTANT: When using lift valve, observe
caution label on lift valve cover.
2. Press up button on remote control switch to exert hydraulic
pressure and press down button to release hydraulic pres-
sure. (See Figure 1 Page 2.)
NOTE: Hold remote control switch so its cord is in a down-
ward position. This positioning reduces stress in
this area of the cord.
3. Monitor pressure gauge whenever exerting hydraulic pres-
sure. S21M readings represent tons or kilo Newtons (kN).
NOTE:
1) Pressure gauge readings represent amount of pressure
each ram applies to its respective chain (and vehicle).
Each ram in use exerts the same amount of pressure. The
S21M pressure gauge displays pressure readings in tons
or kilo Newtons (kN).
2) Although the S21M is a low pressure system, it builds
hydraulic pressure quickly. Be aware of this quick reac-
tion when making pulls or lifting the vehicle.
IMPORTANT: Monitor pressure gauge continually
during repair. Even though the S21M is capable of making
strong pulls, most repairs can be made at low pressure by
using multiple pulls and proper stress relieving of work
hardened metal.
4
C A U T I O N
Do NOT Open This Valve Unless:
1. ALL TOWERS ARE PROPERLY PINNED TO THE
MACHINE.
2. VEHICLES WHEELS ARE BLOCKED, AND
EMERGENCY BRAKE IS SET.
Figure 4
1
*
2
*
S21M Lift Valve
*
1. S21M Tower Valve (side view)
2. Pressure Gauge
*
S21M Auxiliary Ram Line Valve S21M
USERS MANUAL
MOVABLE CROSSMEMBERS
The S21M system features two movable crossmembers that
mount to the channels on the inner edges of the mainframe.
They can be used in front, center or rear sections of machine.
Illustration on Page 1 shows normal location of crossmembers.
The primary use of movable crossmembers is to support and
secure towers at ends of machine. They can also be used as a
base for making hydraulic pulls or pushes when auxiliary rams
are positioned perpendicular (90 degrees) with top or bottom
of crossmember.
To remove crossmember from machine, hold crossmember
secure while turning it counterclockwise. (See Figure 5.) To
reinstall crossmember, reverse the procedure making sure it
engages the channels on the inner edges of the mainframe.
When movable crossmembers are used in front or rear sections
of machine, crossmember locks (see Figure 6)