Operating Instructions and Parts Manual
Air/Hydraulic Bottle Jack
Models AH J- 12 an d AH J- 20
WMH TOOL GROUP
2420 Vantage Drive
Elgin, Illinois 60123 Part No. M-456612
Ph.: 800-274-6848 Revision A 4/05
www.wmhtoolgroup.com Copyright © WMH Tool Group
This manual has been prepared for the owner and operators of a JET AHJ-Series Bottle Jack. Its
purpose, aside from tool operation, is to promote safety using accepted operating and maintenance
procedures. To obtain maximum life and efficiency from your bottle jack and to aid in using it safely,
please read this manual thoroughly and follow the i nstruct ions carefully.
Warranty and Service
WMH Tool Gr oup warrants ever y product it sell s. If one of our tools needs s ervice or repai r, one of our
Authorized Repair St ations located throughout the United States can provide quic k service or information.
In most cases, a WM H Tool Group Repair Station can assist in authorizing repair work, obtaining part s, or
perform routi ne or m ajor maintenance repair on your JET produc t.
For the nam e of an A uthoriz ed Repair St ation in your area, pl ease call 1-800-274-6848, or v isit our web
site at www.wmhtoolgroup.com
More Information
Remember, WMH Tool Group i s consistently adding new products to the li ne. For complete, up-to-dat e
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 it s products meet high quali ty and durability standards
and warrants to the original retail consumer/purchaser of our products that each product be free from
defects in mat erials and workmanship as foll ows: 1 YE AR LIMITED WARRANTY ON ALL PRODUCTS
UNLESS SPECIFIED OTHERWISE. This Warranty does not apply to defects due directly or i ndirectly to
misuse, abuse, negl igence or acc idents, norm al wear-and-tear , repair or alterati ons outside our f aciliti es,
or to a lack of maintenanc e.
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 Repair Station designated by our office. Proof of purchase date and an
explanati on of the complaint m ust accompany the merchandi se. If our inspecti on discloses a defec t, we
will either repair or replace the product at our discreti on, or ref und the pur chase pric e if we cannot readi ly
and quickly provide a repai r or replac ement. We will return the repai red product or replacem ent at WMH
Tool Group’s ex pense, but if it is determ ined there i s no defect, or that the def ect resulted f rom causes
not within the scope of WMH Tool Group’s warranty, then the user must bear the cost of storing and
returning t he product . This warranty gives you specif ic legal ri ghts; you m ay also hav e other ri ghts, whic h
vary from state t o state.
WMH Tool Group sells through distribut ors only. Members of the WMH Tool Group reserve the right to
effect at any time, wit hout prior notice, alter ations to parts, fittings and accessory equi pment, which they
may deem necessary for any reason whatsoever.
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Warning
1. Read and understand all warnings and operating instruc tions before attempting to use this jack.
2. Do not exceed rated capacity. Overloading can c ause damage t o and/or failure of the jack.
3. If jack is damaged and/or oper ates abnormally, remove from service until repaired.
4. Support load by appropriate means after lifti ng.
5. Always center load on the jack.
6. Use this jack as a lifti ng dev ic e only .
7. Use only on a hard, l evel surf ace capable of sustaini ng the load. Usi ng the bot tle j ack on other t han
hard, level surf ac es can resul t in jack instabilit y and possible loss of load.
8. Lift only on areas of t he v ehicl e specif ied by the vehicle manufac turer.
9. Always replace damaged, missing or worn labels and use only genuine factory replacement parts
when replacement is necessary.
10. Only use attachments and/or adapters supplied with, or sold specifically for, t he j ac k.
11. No alterations shall be made to this product.
12. Failure to comply with all of these warnings may result in loss of load, damage to jack, and/or
personal inj ur y or property damage.
Specifications
Model Number.................................................................AHJ-12.................................................. AHJ-20
Stock Number..................................................................456612..................................................456620
Rated Capacity (ton)............................................................... 12..........................................................20
Minimum Height (in.).............................................................9.65.......................................................9.65
Maximum Height (in.)..........................................................18.70..................................................... 18.70
Air Pressure Required (psi)...........................................90 to 145...............................................90 to 145
Base Size (L x W)(in.) ............................................... 8.27 x 6.30.............................................8.66 x 6.89
Net Weigh t (lb s)..................................................................26.46..................................................... 30.86
Shipping Weigh t (lbs)..........................................................30.86.....................................................39.68
The above specifications were current at the tim e this manual was publi shed, but because of our policy of
continuous im provement, WMH Tool Group reserv es the right to change specif ications at any tim e and
without pri or notic e, without incurring obligations.
(NOTE: Numbers in parentheses refer to item
numbers on the breakdown, page 5.)
Inspection Before Use
Prior to each use, visually inspect for leaking
hydraulic oil , dam aged, loose or mi ssing part s. If
jack becomes worn or dam aged in any way, or
operates abnorm all y, remove it fr om service and
contact your nearest service center for repair.
2. Turn the jack 90° to its horizontal position.
Be sure that the air m otor is underneath t he
ram assembly (37).
3. Connect the ai r valve (29) to an air supply,
and press the lev er on the air valv e (29) for
20 seconds to operate the jack.
4. Close the release valve (49) by turning it
clockwise while the jack remains at its
horizontal position. If the r am assembly ( 37)
doesn’t extend, r epeat steps 1 through 4.
Purging the Hydraulic System
During transit, the jack’s hydraulic system may
become filled with air, causing a spongy ram
action. The air should be purged from the
system before operating.
1. To purge air from the hydraulic system,
open the release valve (49) by turning it
counterclockwise for 2 to 3 turns.
Operation
Jack operation is controlled either manually or
by external air pressure. To operate manually,
insert the handle (61) into the handle socket
(60). To operat e by air pressure, connect the air
valve (29) to an external air pressure source.
Clean the air connections and lubr icate air mot or
prior to as sembly.
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