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Seal Kits for Weaver Jacks
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  • Seal Kit  Identification
  • Seal  Kit Components
  • In stallion Instructions


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Weaver WA-73B four 4 Ton Long  chassis Frame Hydraulic Service Jack
Weaver WA-73B Four (4) Ton Long Chassis  Hydraulic Service Jack

 

MODEL DESCRIPTION KIT # PRICE SHIPPING
         
WA-72B Two Ton Service Jack KJ-106 56.95 FREE Shipping**
WA-72 Old Two Ton Service Jack - Old Style
See Note #
KJ-106-OS 83.95 FREE Shipping**
WA-73B Four Ton Service Jack KJ-107 62.95 FREE Shipping**
WA-75B Ten Ton Service Jack KJ-108 94.95 FREE Shipping**
WA-85 Twenty Ton Service Jack KJ-109 149.95  FREE Shipping**
WA-140 * Transmission Jack Cylinder Only KJ-112 65.95 FREE Shipping**
WA-140 * Transmission Jack Pump Only KJ-113 65.95 FREE Shipping**
   * Specify Suffix - None, A,B, or D      
  # Note: Older style WA-72 Jack requires additional parts.  If the rear of the cylinder is a casting which is held down by TWO Cotter Keys - it is an old style
Order the following Additional  Parts:
Qty 3 ea S-7492 Packing  1-1/8" O.D.
    ** FREE Shipping in the 48 USA only


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How Can I Identify My Jack?+


Using the following Dimension Chart, - Compare Features and Measurements 

MODEL
CAP.
(tons)

FRONT WHEELS

SADDLE STYLE
AND SIZE

FRAME LENGTH

JACK
WEIGHT

WA-72B 2 Two -  4" Diameter Triangular or Round
 5"' to 6"
51" 136 lbs
WA-73B 4 Two -  5"
 
Diameter
Triangular or Round
 5" to 6"
58" 212 lbs
WA-75B 10 Two -  7" Diameter Round
9"
66" 356 lbs
WA-85 20 Three-  7" Diameter Square
7"
69" 531 lbs

 

How Can I Identify My Jack Model Number?

 
Using the following Description Chart, - Determine Whether You Have an A or B Model

MODEL CAP. TONS CYLINDER DESCRIPTION KIT #
       
WA-72A 2 Head of cylinder is held down
by TWO Cotter Keys
KJ-106
WA-72B 2 Head of cylinder is held down
 by Metal Tabs
KJ-106
WA-73A 4 Head of cylinder is held down
 by TWO Cotter Keys
KJ-107
WA-73B 4 Head of cylinder is held down
by Metal Tabs
KJ-107
WA-75A 10 Head of cylinder is held down
 by A Large Pin Through The Frame
KJ-108
WA-75B 10 Head of cylinder is held down
 by TWO Bolts Inside Frame
KJ-108
WA-85 20 Head of cylinder is held down
 by TWO Bolts Inside Frame
KJ-109

If Your Jack Looks like a Weaver Jack, but it has a different Manufacturers Label on it -
 Some Manufacturers Private Label Weaver Jacks for sale under their Name -
Contact Us - We can assist you in Identifying your Jack.

 

 

Weaver 20 ton Service Jack
Weaver 20 ton Hydraulic Service Jack Model WA-85

 

Weaver Service Jacks
WA-72B (2 ton)         WA-75B (10 ton)        WA-73B (4 ton)

 

 

  • Typical Seal Kit Components for Weaver 2, 4, 10 & 20 Ton Service Jacks

  

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KJ-106 Seal Kit
 for Weaver WA-72B   2 Ton Jack
KJ-107 Seal Kit
 for Weaver WA-73B   4 Ton Jack
 
Contains:

S-6654 Piston Packing (3)
S-22961 Cylinder Cap Gasket
S-6016 Piston Ram Cup
S-7265 Pump Cup
S-7492A Pump  Packing (3)  1-1/2"O.D.*
S-17829 Large "O" Ring
S-15047  Small "O" Ring
S-2594 Ball Chamber Gasket
S-2750 Ball 1/2"
S-2505 Ball  5/16"
S-2499 Cotter Pin (2)
S-3234 Cotter Pin

*Note: Older style WA-72 Jack requires additional parts.  If the rear of the cylinder is a casting which is held down by TWO Cotter Keys - it is an old style
Order the following Additional  Parts:
Qty 3 ea S-7492 Packing  1-1/8" O.D.

(New Style is a Machined Block which is held down by Metal Tabs)
 
Contains:

S-6614 Piston Packing (3)
S-22962 Cylinder Cap Gasket
S-4714 Piston Ram Cup
S-24648 Pump Cup
S-7412 Pump Rod  Packing (3)
S-17829 Large "O" Ring
S-15047  Small "O" Ring
S-2594 Ball Chamber Gasket
S-2750 Ball 1/2"
S-2505 Ball  5/16"
S-2499 Cotter Pin (2)
S-3234 Cotter Pin



 
KJ-108 Seal Kit
 for Weaver WA-75B   10 Ton Jack
KJ-109 Seal Kit
 for Weaver WA-85   20 Ton Jack

Contains:

S-6615 Piston Rod Packing (3)
S-22963 Cylinder Cap Gasket
S-24649 Piston Ram Cup
S-24648 Pump Cup
S-7412 Pump Rod Packing (3)
S-17829 Large "O" Ring
S-15047  Small "O" Ring
S-5125 Ball Chamber Gasket
S-5122 Ball  5/8"
S-3282 Ball  3/8"
S-3083 Cotter Pin
S-24703 Teflon Ring
 
Contains:

S-16022 Piston Rod Packing (3)
S-22964 Cylinder Cap Gasket
S-16023 Piston Ram Cup
S-24648 Pump Cup
S-7412 Pump Rod Packing (3)
S-17829 Large "O" Ring
S-15047  Small "O" Ring
S-5125 Ball Chamber Gasket
S-5122 Ball  5/8"
S-3282 Ball  3/8"
S-3083 Cotter Pin

 

 

  

INSTALLATION INSTRUCTIONS FOR WEAVER SEAL KITS
 
These Jack Cylinder Service Kits are for minor cylinder repairs only, if additional servicing is required have repairs performed by a qualified hydraulic jack repair center.
Use Safety Solvent or Mineral Spirits to clean parts—blow dry with compressed air.
Do not use Gasoline, lacquer thinner or any other solvents as these will damage the seals.
 
Use AW-32 Light Hydraulic Oil (or oil that meets MIL•F•17111 011 specifications)

 

To Remove The Cylinder:

1. Remove the cotter pin (pins) or bolts in the cross head.

2. Remove the cotter and pin in the pump.

3. Remove the cotter and pin in the release yoke.

4. Place cotter key in while depressing foot pedal.
This allows for easy removal and reassembly if spring is left on return rod.

5. Raise the lifting arm by means of the saddle bracket, and place a block of wood between the arm and frame to hold up the arm.

6. This releases the cylinder at the forward end, so that it may be removed as a complete unit, for service.

 
Weaver Jack Cylinder Diagram For Seal Kit Installation
Piston and Pump Assembly Derail for Weaver Jack Cylinders
Weaver Jack Piston Ram Cup Ram Cup Replacement
 

To Replace The Piston Ram Cup: 

1. After removing the cylinder unit as described above, place it in a vise. Note that the vise jaws should grip the steel block, not the steel cylinder. Set the unit in the vise with the steel cylinder and piston up. Remove the vent plug.  Drain the oil.

2. Remove the Packing Nut [A] and three Packings [B] .Unscrew the cylinder cap [C] and lift the piston out of the cylinder.

3. Remove the nut [I], Lock Washer [H], and washer [G] which holds the cup [F] at the end of the piston--put in the new cup [F], and replace the nut and washer.  (The Backup Teflon Ring [E] is only used on certain – but not all WA-75A models only)   Either peen the threads with a punch or use a thread locking compound to prevent nut from loosening.

4. In fitting the new cup into the cylinder, USE GREAT CARE as the cup passes the filler plug hole not to cut or otherwise damage the cup.  Lubricate the cup with hydraulic oil when assembling.

5. Replace the Cylinder Cap [C] and Gasket [D] -- install the 3 new Packings [B]   and the Packing Nut [A].

 

 

CAUTION

Excessive friction, chatter and binding will occur if the cup nut is pulled down too tightly.

TIP This means that you use only enough pressure to close the spring lock washer [H].  Do not tighten until the cup heel begins to extrude (swell) as this may cause problems

When servicing a jack with a synthetic cup, it may appear that the nut has become loosened, but this is not necessarily true. It is only necessary to hold the cup against the ram with slight pressure to prevent leakage.

 
Weaver Jack Pump Cup Pump Cup Replacement
 

To Replace The Pump Cup (small cup):

1. Turn the cylinder unit pump end upward in the vise.

2. Unscrew the packing nut [M] - Remove three Packings [L] and pull out the pump plunger.   Remove the Nut [J] that holds Cup [K] to the end of plunger; insert new cup, new packings and replace the nut and washers. 
3.
Lubricate the cup with hydraulic oil when reassembling.  Either peen the threads with a punch or use a thread locking compound to prevent the nut from loosening.

 
Diagram Weaver Jack Release Valve and Ball Valve 
Release Valve Group and Ball Valve Assembly Derail for Weaver Jack Cylinders
 
Weaver Jack Ball Valves Ball Valve Replacement
 

Ball Valve Replacement:

1. Remove the Ball Chamber Plug [V].  Remove the Two Balls [X&Z] and the Ball weight [Y].

2.  Reassemble with the two new Balls [X&Z], New Plug Gasket [W] and Ball Weight [Y] (reuse the existing Ball weight).  Ball Weight is installed between the two balls.

IMPORTANT: Whenever it is necessary to loosen or remove the Ball Chamber Plug, the Gasket [W] should be replaced with a new one. Oil leakage at this point is usually caused by trying to reuse an old gasket over again.

Weaver Jack Release Valve "O" Rings   Release Valve Packing Housing
"O"-Ring Replacement
 

Release Group Needle Valve Packing “O” Rings Replacement:

1.  Measure accurately the distance from the Bracket [O] to the first Nut [P] on the compression spring. Write this measurement down. (This is approximately 2 inches)

2.   Loosen the Packing Nut [R].  Remove Nuts [P] & [Q], the Spring, the Valve Rod [N] , the Valve Guide [OO] and the Packing Nut [R].  It is not necessary to remove the rod clevis.

3.  Remove the Packing Housing [S] and replace the two “O” rings [T&U].  Now reinsert the Packing Housing [S].  Reassemble the Needle Valve and parts with the Packing Nut [R] tightly secured.

4. Tighten the adjusting nut [P] to the original dimension that you wrote down and lock this nut with Nut [Q].

 
Weaver Jack Release Group Detail
Release Valve Group (upper )   -  Pump Assembly (lower)
 
Release Group - Needle Valve Adjustment
 

 

Release Group Needle Valve Adjustment:

In the release group assembly, the spring governs the load that the Jack will lift.  When the pressure within the cylinder overcomes the spring tension then the release valve floats off the seat.  It is Imperative that the release valve floats freely in the release group assembly. To check- use your forefinger and thumb to grasp the release valve where the release clevis pin passes thru, and wiggle from side to side. There should be a minimum of .002 to.004 clearance in the Release Vale Guide [OO]. If no movement is noted, follow these steps:

Refer to above Diagram

Measure accurately the distance from the Bracket [O] to the first Nut [P] on the compression spring. Write this measurement down. (This is approximately 2 inches)

Remove Nuts [P] & [Q], the Spring, the Valve Rod [N] and the Valve Guide [OO].  It is not necessary to loosen the Packing Nut.

Next, insert the Valve Rod [N] thru the Bracket’s [O] opening, slide the Release Valve Guide [OO] onto the rod, but not seated in the hole, and insert the rod [N] into the Packing Nut’s [R] opening.

Gently Tap the end of the release rod [N] with a hammer until it stays firmly seated in the internal needle seat.  Slide the Release Valve Guide [OO] towards the Bracket [O] (normally it will smoothly fit into the bracket hole) and then noting where the center alignment of the rod in the bracket hole is off -- Tap the welded bracket accordingly with a hammer to gently bend the bracket and correct the misalignment. It is in alignment when you can smoothly slide the Valve Guide into the Bracket’s hole.

Reassemble the Release Valve and parts.  Tighten the adjusting nut [P] to the original dimension that you wrote down and lock this nut with Nut [Q] and then test the Jack for proper operation. 

 

 

Troubleshooting
See the Operations and Service Manual  CLICH HERE

 

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 for Other Weaver Jack Parts

 

 

Service Manuals for Weaver Jacks Print a Copy of these Seal Kit Instructions

CLICK HERE

    

 


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