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Save these instructions. 

For your safety, read, understand, and follow the information provided with and on this jack. 

The owner and operator shall have an understanding of this jack and safe operating procedures before attempting to 

use. The owner and operator shall be aware that 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 

and the manufacturer notified. 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 Hein-Werner authorized service 

center (contact distributor or manufacturer for list of Authorized Service Centers). It is recommended that an annual 

inspection be done by qualified personnel. 

Replace worn or damaged parts and assemblies with Hein-Werner authorized 

replacement parts only (see Replacement Parts, pages 6 thru 11).

PRODUCT DESCRIPTION

Hein-Werner Air Actuated Hydraulic Truck Jacks are designed to lift, but not support, rated capacity loads. They are 

designed to be used vertically. Immediately after lifting, loads must be supported by appropriate mechanical means 

(as opposed to hydraulic means), such as a pair of appropriately rated jack stands.

           

NEVER

 use hydraulic jack as stand-alone device. After lifting, 

immediately

 support the lifted vehicle 

           with a pair of appropriately rated vehicle stands.

2

 

!

•  

Study, understand, and follow

 all printed materials provided with and on this device 

before use

.

•  

Do not

 exceed rated capacity.

•  

This is a lifting device only!

•  

Immediately

 after lifting, support the vehicle with a pair of appropriately rated vehicle stands.

•  Use only on hard, level surfaces capable of supporting rated capacity loads.

•  

Never

 work on, under, or around a load supported only by this device.

•  Never wire, clamp or otherwise disable the lift control valve to function by other than operator's hand.

•  Use ONLY on vehicles whose lift points are compatible with the saddle of this jack. Incompatibility may result 

in structural damage to the vehicle and/or jack.

• Chock each unlifted tire in both directions.

• 

Do not

 use this device to lift, level, lower, support nor move a house, mobile home, travel trailer, camper or 

any building structure.

• 

Be alert

 and 

sober

 when using this product! Never operate this device when under the influence of drugs or 

alcohol.

•  No alterations shall be made on this product.

•  FAILURE TO HEED THESE MARKINGS MAY RESULT IN PERSONAL INJURY AND/OR PROPERTY 

DAMAGE.

!

   

WARNING

X

Summary of Contents for HW93731

Page 1: ...k Jacks Capacity 20 Ton 20 Ton HW93731 M0 rev 07272010 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...

Page 2: ...Hein Werner Air Actuated Hydraulic Truck Jacks are designed to lift but not support rated capacity loads They are designed to be used vertically Immediately after lifting loads must be supported by ap...

Page 3: ...000lbs Low Height 9 High Height With Extension 19 3 4 Screw Extension 4 3 4 Lift Cap Diameter 2 Wheel Diameter 8 Chassis Overall Length 20 Width at Wheels 13 1 4 Handle Length 45 Base Size 8 x 17 Max...

Page 4: ...parts only Lubricate as instructed in Maintenance Section OPERATION Lifting Only attachments and or adapters supplied by the manufacturer shall be used Lift only on areas of the vehicle as specified...

Page 5: ...s used pour a teaspoon of air tool oil into the inlet of the air control valve Simply operate the jack using the air feature in order to fully distribute the oil Cleaning Periodically inspect the ram...

Page 6: ...13 3 52 37 43 44 47 34 39 30 25 22 42 23 11 35 Apply Never Seez or equivalent to threads and face at both ends of Ram Cylinder Ref 44 before assembling Assemble to Base Ref 59 and tighten to crush joi...

Page 7: ...arts Illustration for Model HW93731 Air Hydraulic Pump Assembly Figure 6 Parts Illustration for Model HW93731 Pump Piston Assembly 77 95 79 72 77 94 93 88 65 87 98 82 70 86 84 85 80 92 69 101 83 66 69...

Page 8: ...46 228091 Cross pin 1 47 228099 O ring 1 48 228929 Air hydraulic Pump Assy 1 49 229131 Pipe Plug 2 50 230125 Heel Plate 1 51 230126 U cup Packing 1 52 230134 Ram Assembly 1 53 245958 Ram 1 54 231102 A...

Page 9: ...9 Replacement Parts Illustration For Model HW93733 Part I refer to page 11 for parts list 1 2 3 4 3 Figure 7 Parts Illustration for Model HW93733 Main Frame 19 9 5 16 11 13 12 3 17 10 18 14 15 6 7 8 7...

Page 10: ...page 11 for parts list Figure 8 Parts Illustration for Model HW93733 Air Motor Hydraulic Unit Hydraulic Unit Assembly includes Air Motor 57 28 58 52 53 37 54 29 35 36 55 56 38 39 in reservoir 44 32 45...

Page 11: ...BJ398020 Top Cap 1 28 NJ100046 Quad ring 1 29 BD674061 Pin 1 8D x 9 16L 1 30 B1160000 Ball 7 32 1 31 BS116000 Ball 5 16 1 32 AJ100040 Valve Spring 1 33 BB159167 Gaket 19 32OD 1 34 BK300600 Valve Plug...

Page 12: ...EVER 3 ANY IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED TO TWO YEARS OTHERWISE THE REPAIR REPLACEMENT...

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