WMH Tool Group JET JASJ-22C Service manual

Operating Instructions and Parts Manual
Air/Hydraulic 22-Ton Service Jack
Model JASJ-22C
WMH TOOL GROUP
2420 Vantage Drive
Elgin, Illinois 60123 Part No. M-454200C
Ph.: 800-274-6848 Revision A 9/05
www.wmhtoolgroup.com Copyright © WMH Tool Group

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This manual has been prepared for the owner and operators of a JET JASJ-22C Service Jack. Its
purpose, aside from machine operation, is to promote safety using accepted operating and maintenance
procedures. To obtain maximum life and efficiency from your service jack and to aid in using it safely,
please read this manual thoroughly and follow the instructions carefully.
Warranty and Service
WMH Tool Group warrants every product it sells. If one of our tools needs service or repair, one of our
Authorized Service Centers located throughout the United States can provide quick service or
information.
In most cases, a WMH Tool Group Service Center can assist in authorizing repair work, obtaining parts,
or perform routine or major maintenance repair on your JET product.
For the name of an Authorized Service Center in your area, please call 1-800-274-6848, or visit our web
site at www.wmhtoolgroup.com
More Information
Remember, WMH Tool Group is consistently adding new products to the line. For complete, up-to-date
product information, check with your local WMH Tool Group distributor, or visit our web site at
www.wmhtoolgroup.com
WMH Tool Group Warranty
WMH Tool Group makes every effort to assure that its products meet high quality and durability standards
and warrants to the original retail consumer/purchaser of our products that each product be free from
defects in materials and workmanship as follows: 1 YEAR LIMITED WARRANTY ON ALL PRODUCTS
UNLESS SPECIFIED OTHERWISE. This Warranty does not apply to defects due directly or indirectly to
misuse, abuse, negligence or accidents, normal wear-and-tear, repair or alterations outside our facilities,
or to a lack of maintenance.
WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD SPECIFIED ABOVE,
BEGINNING FROM THE DATE THE PRODUCT WAS PURCHASED AT RETAIL. EXCEPT AS STATED
HEREIN, ANY IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS ARE EXCLUDED.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG THE IMPLIED WARRANTY LASTS,
SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. IN NO EVENT SHALL WMH TOOL GROUP
BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR FOR INCIDENTAL,
CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR
PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL
OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY
TO YOU.
To take advantage of this warranty, the product or part must be returned for examination, postage
prepaid, to an Authorized Service Center designated by our office. Proof of purchase date and an
explanation of the complaint must accompany the merchandise. If our inspection discloses a defect, we
will either repair or replace the product at our discretion, or refund the purchase price if we cannot readily
and quickly provide a repair or replacement. We will return the repaired product or replacement at WMH
Tool Group’s expense, but if it is determined there is no defect, or that the defect resulted from causes
not within the scope of WMH Tool Group’s warranty, then the user must bear the cost of storing and
returning the product. This warranty gives you specific legal rights; you may also have other rights, which
vary from state to state.
WMH Tool Group sells through distributors only. Members of the WMH Tool Group reserve the right to
effect at any time, without prior notice, alterations to parts, fittings and accessory equipment, which they
may deem necessary for any reason whatsoever.

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Table of Contents
Warranty and Service ..............................................................................................................................2
Table of Contents ....................................................................................................................................3
Warning...................................................................................................................................................3
Introduction..............................................................................................................................................4
Specifications..........................................................................................................................................4
Assembly.................................................................................................................................................5
Before Operation.....................................................................................................................................5
Operation.................................................................................................................................................5
Lowering..................................................................................................................................................5
Maintenance............................................................................................................................................6
Replacement Parts..................................................................................................................................6
JASJ-22C Service Jack............................................................................................................................7
Warning
1. Read and understand the entire owner’s manual before attempting assembly or operation.
2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with
all of these warnings may cause serious injury.
3. This air/hydraulic service jack is designed and intended for use by properly trained and experienced
personnel only. If you are not familiar with the proper and safe operation of an air/hydraulic service
jack, do not use until proper training and knowledge have been obtained.
4. This is a lifting device only. Do not move or dolly the vehicle while on the jack. The load must be
supported immediately by other appropriate means.
5. Lift only on areas of the vehicle as specified by the vehicle manufacturer.
6. This jack is designed for use only on hard, level surfaces capable of sustaining the load. Use on other
than hard, level surfaces can result in jack instability and possible loss of load.
7. Failure to heed these warnings may result in loss of load, damage to the jack, and/or failure resulting
in personal injury and/or property damage.
- - SAVE THESE INSTRUCTIONS - -

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Introduction
This manual is provided by WMH Tool Group covering the safe operation and maintenance procedures
for a JET Model JASJ-22C Service Jack. This manual contains instructions on installation, safety
precautions, general operating procedures, maintenance instructions and parts breakdown. This machine
has been designed and constructed to provide years of trouble free operation if used in accordance with
instructions set forth in this manual. If there are any questions or comments, please contact either your
local supplier or WMH Tool Group. WMH Tool Group can also be reached at our web site:
www.wmhtoolgroup.com.
Specifications
Model Number...........................................................................................................................JASJ-22C
Stock Number..............................................................................................................................454200C
Capacity (ton)........................................................................................................................................22
Minimum Height (in.)...........................................................................................................................8.27
Extension Screw Height (in.)...............................................................................................................4.13
Maximum Height (in.)........................................................................................................................20.67
Handle Length (in.)...........................................................................................................................41.34
Saddle Diameter (in.).................................................................................................................. 2.68/1.89
Air Pressure (PSI).........................................................................................................................100-150
Air Consumption for Full Lift (CFM).....................................................................................................7.85
Air Hose Size (NPT)..............................................................................................................................1/4
Hydraulic Oil Volume (cu. in.)..............................................................................................................29.8
Lifting Time (rated load @ 120 psi) ...............................................................................................140 sec.
Lifting Time (no load @ 120 psi)......................................................................................................40 sec.
Overall Dimensions (L x W)(in.)...............................................................................................22.44 x 12.2
Net Weight (lbs.)..................................................................................................................................101
Shipping Weight (lbs.)..........................................................................................................................110
The above specifications were current at the time this manual was published, but because of our policy of
continuous improvement, WMH Tool Group reserves the right to change specifications at any time and
without prior notice, without incurring obligations.

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Assembly
NOTE: Part numbers in parentheses refer to
numbers in the parts breakdown on page 7.
1. Remove bolt (63) from the handle socket
(62).
2. Line up the positioning rod and the handle
assembly. Insert into proper holes and
tighten bolt in the handle socket.
Before Operation
1. Open the release valve by turning knob (70)
counterclockwise no more than two full
turns.
2. With the ram fully retracted, remove the oil
filler plug (96). This will help release any
pressurized air that may be trapped within
the reservoir. Make sure oil level is just
below the oil filler plug hole.
3. If oil is low, use a good quality hydraulic jack
oil such as Mobil DTE 13. Re-install the oil
filler plug (96).
4. Each day before operating the jack, add 1/2
ounce of JET Marvel Air Tool to the air inlet.
Operate for at least three seconds to evenly
distribute the oil. Lack of oil may cause
damage to the pump.
5. Connect the jack to the compressor. Use
only clean, dry air. Dirty or humid air may
cause damage to the pump.
6. Close release valve by turning knob (70)
clockwise until it stops.
7. Press valve lever and check to see if the
ram rises.
8. Open release valve by turning knob
counterclockwise and check to see if the
ram lowers.
Operation
Do not use a saddle extender
when using this product. Failure to comply
may cause damage to property and/or
serious injury!
1. Inspect before use. Do not use if broken,
cracked or damaged in any way.
2. Position handle in most convenient
operating position. Release handle lock by
pulling positioning lever.
3. Move the jack and position the saddle under
the point of contact.
4. Raise the saddle until the saddle contacts
the load and then stop.
5. Check the point of contact to make sure the
load is centered.
6. Raise the load to the desired height and
transfer the load to jack stands.
Lowering
1. Raise load enough to remove jack stands.
2. Slowly turn release valve knob counter-
clockwise, no more than a 1/2 turn.
Do not turn the release valve
knob more than one half turn
counterclockwise! This may cause sudden
lowering which can lead to loss of control.
Failure to comply may cause damage to
property and/or serious injury!
If the jack is laid down before using or during
transit, it may become “airbound” and the ram
will not rise. To remove air from the hydraulic
system:
1. Open the release valve knob.
2. With the air supply connected, activate the
air pump for 10-15 seconds.
3. Close the release valve knob and check for
normal operation.
4. If the ram still will not rise, repeat step 1
through 3.

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Maintenance
• Keep oil reservoir filled.
• Clean the jack after use.
• Check sliding and rotating parts. Oil as
needed.
• When storing the jack, keep the handle
upright and the ram in the lowest position.
• Periodically check the pump piston and ram
for signs of rust or corrosion. Clean as
needed and wipe with an oily cloth.
For best performance and long life, replace the
complete fluid supply at least once per year.
Changing the Oil:
1. Lower the ram to the lowest position.
2. Remove filler plug (96).
3. Tilt jack on its side and drain the fluid into a
suitable container. Dispose of oil according
to local regulations.
4. Fill reservoir with clean hydraulic jack oil
until level is to the bottom of the fill hole.
Only use good quality hydraulic jack oil
such as Mobil DTE 13. Never use brake
fluid, transmission fluid, motor oil or turbine
oil.
5. Re-install filler plug (96).
Troubleshooting
Trouble Probable Cause Remedy
Release valve not tightly closed. Tighten release valve knob.
Overload condition. Remedy overload condition.
Jack will not lift load.
Pressure of air supply is too low. Change to a suitable pressured air
source.
Release valve not tightly closed. Tighten release valve knob.
Overload condition. Remedy overload condition.
Jack bleeds off after
lift. Hydraulic unit malfunction. Contact WMH Technical Service.
Reservoir is overfilled. Drain oil to proper level.
Jack will not lower
after unloading. Linkages binding. Clean and lubricate moving parts.
Oil level low. Fill oil to proper level.
Poor lift performance. Air is trapped in system. With ram fully lowered, remove oil
filler plug to let air escape; reinstall oil
filler plug.
Jack will not lift to full
extension. Oil level low. Fill oil to proper level.
Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call
1-800-274-6848 between 7:30 a.m. and 6:00 p.m. (CST), Monday through Friday. Having the Model
Number and Serial Number of your machine available when you call will allow us to serve you quickly and
accurately.

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JASJ-22C Service Jack

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Parts List: JASJ-22C Service Jack
Index No. Part No. Description Size Qty
1...............JASJ22C-1.............. Copper Washer ........................................... .........................................1
2...............AHJ12-1.................. Pump Cylinder............................................. .........................................1
3...............AHJ12-2.................. Y-Seal*........................................................5.8x12x5.2mm..................1
4...............AHJ12-3.................. Nylon Gasket*..............................................5.8x12x1.25mm ................1
5...............AHJ12-4.................. Copper Washer ........................................... .........................................1
6...............AHJ12-5.................. Nut .............................................................. .........................................1
7...............AHJ12-6.................. O-Ring.........................................................18x2.65mm.......................1
8...............TS-1503051............ Socket Head Cap Screw..............................M6x20...............................8
9...............AHJ12-8.................. Base Cover.................................................. .........................................1
10.............SB-3MM.................. Steel Ball.....................................................Ø 3mm..............................4
11.............AHJ12-10................ Air Motor Housing........................................ .........................................1
12.............AHJ12-11................ Nut .............................................................. .........................................1
13.............AHJ12-12................ Spring.......................................................... .........................................1
14.............AHJ12-13................ Washer........................................................ .........................................1
15.............AHJ12-14................ Air Pump Plunger......................................... .........................................1
16.............AHJ12-15................ Air Piston Base............................................ .........................................1
17.............AHJ12-16................ O-Ring.........................................................20.3x2.65mm....................1
18.............AHJ12-17................ Air Shuttle Valve.......................................... .........................................1
19.............AHJ12-18................ O-Ring.........................................................43x3.55mm.......................2
20.............AHJ12-19................ Air Piston..................................................... .........................................1
21.............TS-1502021............ Socket Head Cap Screw..............................M5x10...............................3
22.............AHJ12-21................ Shuttle Valve Seal ....................................... .........................................1
23.............AHJ12-22................ O-Ring.........................................................57x5.3mm.........................2
24.............AHJ12-23................ O-Ring.........................................................67x2.4mm.........................1
25.............AHJ12-24................ Top Cover.................................................... .........................................1
26.............AHJ12-25................ Snap Ring....................................................Ø 14mm............................1
27.............AHJ12-26................ O-Ring.........................................................11.5x1.5mm......................2
28.............AHJ12-27................ Coupler........................................................ .........................................1
29.............JASJ22C-29............ Air Hose Assembly ...................................... .........................................1
30.............AHJ12-29................ Air Valve Assembly...................................... .........................................1
31.............JASJ22C-31............ Valve Block Assembly.................................. .........................................1
32.............SB-6MM.................. Steel Ball.....................................................Ø 6mm..............................2
33.............JASJ22C-33............ Spring.......................................................... .........................................1
34.............SB-9MM.................. Steel Ball.....................................................Ø 9mm..............................1
35.............JASJ22C-35............ Spring.......................................................... .........................................1
36.............JSJ3T-64 ................ Copper Washer ........................................... .........................................1
37.............TS-1506011............ Socket Head Cap Screw..............................M12x20.............................1
38.............SB-4MM.................. Steel Ball.....................................................Ø 4mm..............................1
39.............JSJ3T-56 ................ Safety Valve Ball Seat ................................. .........................................1
40.............JSJ3T-57 ................ Safety Valve Spring..................................... .........................................1
41.............JSJ3T-58 ................Safety Valve Adjusting Screw ...................... .........................................1
42.............JSJ3T-59 ................ Seal* ........................................................... .........................................1
43.............JSJ3T-60 ................ Safety Valve Screw...................................... .........................................1
44.............JSJ3T-46 ................ Lock Pin ......................................................Ø 4x20mm........................3
45.............JSJ3T-53 ................ Seal* ........................................................... .........................................1
46.............JSJ3T-52 ................Release Pin................................................. .........................................1
47.............JSJ3T-21 ................ Pin...............................................................Ø 3x18mm........................1
48.............JASJ22C-48............ Universal Joint Assembly............................. .........................................1
49.............JASJ22C-49............ Rod Joint..................................................... .........................................1
50.............JASJ22C-50............ Lower Release Rod ..................................... .........................................1
51.............JASJ22C-51............ U-Bolt.......................................................... .........................................2
52.............JASJ22C-52............ Front Handle................................................ .........................................1
53.............JASJ22C-53............ Lock Pin ......................................................Ø 4x16mm........................1
54.............JASJ22C-54............ Split Pin....................................................... .........................................3
55.............JASJ22C-55............ Angular Bracket........................................... .........................................1
56.............TS-1540061............ Hex Nut.......................................................M8....................................5
57.............TS-2311081............ Lock Washer................................................M8....................................4

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58.............TS-1550061............ Flat Washer.................................................M8 ....................................4
59.............JASJ22C-59............ Adapter........................................................Ø 48x20mm......................1
60.............JASJ22C-60............ Adapter........................................................Ø 48x50mm......................1
61.............JASJ22C-61............ Adapter........................................................Ø 48x100mm....................1
62.............JASJ22C-62............ Handle Socket............................................. .........................................1
63.............JASJ22C-63............ Handle Socket Bolt...................................... .........................................1
64.............JASJ22C-64............ Rod Joint..................................................... .........................................1
65.............JASJ22C-65............ Upper Release Rod ..................................... .........................................1
66.............JASJ22C-66............ Flat Washer.................................................Ø 10mm............................5
67.............JASJ22C-67............ Phillips Pan Head Machine Screw................M5x8.................................1
68.............JASJ22C-68............ Rear Handle ................................................ .........................................1
69.............JSJ3T-32 ................ Handle Sleeve............................................. .........................................2
70.............JSJ3T-39 ................ Knob............................................................ .........................................1
71.............JSJ3T-40 ................ Lock Pin ......................................................Ø 4x40mm........................1
72.............JASJ22C-72............ Sleeve......................................................... .........................................1
73.............JASJ22C-73............ Lock Lever................................................... .........................................1
74.............JSJ3T-44 ................ Lock Pin ......................................................Ø 3x18mm........................1
75.............TS-1502021............ Socket Head Cap Screw..............................M5x10...............................2
76.............JASJ22C-76............ Upper Control Rod....................................... .........................................1
77.............JASJ22C-77............ Spring.......................................................... .........................................1
78.............JASJ22C-78............ Lower Control Rod....................................... .........................................1
79.............JASJ22C-79............ Frame (LH).................................................. .........................................1
80.............JASJ22C-80............ Bracket........................................................ .........................................1
81.............JASJ22C-81............ Base Plate................................................... .........................................1
82.............JASJ22C-82............ Frame (RH)................................................. .........................................1
83.............JSJ3M-05................ Lock Washer................................................M10 ..................................4
84.............JASJ22C-84............ Hex Cap Screw............................................M10x16.............................4
85.............JASJ22C-85............ Wheel.......................................................... .........................................2
86.............JASJ22C-86............ Snap Ring....................................................Ø 15mm............................2
87.............TS-1533042............ Phillips Pan Head Machine Screw................M5x12...............................4
88.............TS-1550031............ Flat Washer.................................................M5 ....................................4
89.............JASJ22C-89............ Hex Cap Screw............................................M12x25.............................4
90.............JASJ22C-90............ Lock Washer................................................M12 ..................................4
91.............JASJ22C-91............ Flat Washer.................................................M12..................................4
92.............TS-1534042............ Phillips Pan Head Machine Screw................M6x12...............................4
93.............TS-1550041............ Flat Washer.................................................M6 ....................................4
94.............TS-1504051............ Socket Head Cap Screw..............................M8x25...............................3
95.............JASJ22C-95............ O-Ring.........................................................7.1x2.65mm......................3
96.............JSJ3T-66 ................ Oil Filler Plug............................................... .........................................1
97.............JASJ22C-97............ Oil Tank Assembly....................................... .........................................1
98.............JSJ10T-68............... Snap Ring....................................................Ø 48mm............................1
99.............JSJ10T-69............... O-Ring Retainer........................................... .........................................1
100...........JSJ10T-70............... O-Ring* .......................................................53x5.3mm.........................1
101...........JSJ10T-71............... Seal Washer*............................................... .........................................1
102...........JSJ10T-72...............Piston Ring.................................................. .........................................1
103...........JASJ22C-103.......... Ram Assembly ............................................ .........................................1
104...........JASJ22C-104.......... Bushing ....................................................... .........................................2
105...........JSJ10T-75............... O-Ring* .......................................................61.5x5.3mm......................1
106...........JASJ22C-106.......... Snap Ring.................................................... .........................................1
107...........JASJ22C-107.......... Hex Nut (thin) ..............................................M10 ..................................2
108...........JASJ22C-108.......... Spring.......................................................... .........................................2
109...........JASJ22C-109.......... Bolt.............................................................. .........................................2
110...........JASJ22C-110.......... Spring Hanger ............................................. .........................................1
111...........JASJ22C-111.......... Cover........................................................... .........................................1
112...........JASJ22C-112.......... Adapter........................................................Ø 68x20mm......................1
.................JASJ22C-RK........... Repair Kit..................................................... ...........................................
NOTE: Items included in the Repair Kit are indicated by an asterisk (*).

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WMH Tool Group
2420 Vantage Drive
Elgin, Illinois 60123
Phone: [phone]
www.wmhtoolgroup.com

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