Woodhead 20Ja, 100Ja, 9020Ja User Manual

20Ja through 100Ja

9020Ja through 9070Ja

Balancer Series

Service Manual

AERO-MOTIVE COMPANY

A Woodhead Industries, Inc. Subsidiary

IMPORTANT SAFETY INSTRUCTIONS

Please read this manual carefully and follow its instructions. Improper use or failure to follow these instructions could
result in serious injury, death or property damage. Operators should be instructed in the safe and proper use and
maintenance of this product. Keep this manual for future reference.

The following safety precautions call attention to potentially dangerous conditions.

DANGER:

WARNING:

CAUTION:

NOTE: Instruct operators in the safe, proper use and maintenance. Keep this manual for future reference.

Immediate hazards which WILL result in severe personal injury or death.

Hazards or unsafe practices which COULD result in severe personal injury or death.

Hazards or unsafe practices which MAY result in minor personal injury or product or
property damage.

INSTALLATION

WARNING:

CAUTION:

MOUNTING

Hang balancer in the desired location by the clevis provided at the top. The balancer should be
suspended directly over work area using an eyebolt or similar device with a break strength exceeding 6
times the combined weight of the balancer and the load it is supporting. Balancer should be mounted in
such a manner as to minimize cable contact with the cable guide. For proper alignment, utilize the three
mounting holes at the top of balancer. If shackle is removed to make the connections, be sure that the
nut and cotter pin are properly replaced on the shackle pin.

Failure to read, understand or follow these instructions could lead to hazards or unsafe
practices COULD result in

Instruct operators in the safe, proper use and maintenance of this product. Hazards or
unsafe practices MAY result in minor personal injury or product or property damage.

severe

personal injury or death.

SECONDARY SUPPORT CHAIN

DANGER:

A hole has been provided at the side of the housing to permit installation of a secondary support chain.
All balancers mounted over head should have a secondary support chain to protect personnel in case of
structure or mounting component failure. Attach one end of secondary support chain or cable to
secondary support point (shackle) on balancer. Attach the other end of secondary support chain or
cable to a support component other than that which supports the balancer. The chain or cable should be
as short as possible allowing the balancer to drop no more than 6 to 12 inches if the primary connection
is released. (See Illustration) A secondary support is offered as an accessory item.

Sm1140-01C Page 1 of 7 ©Jun-01

A secondary safety cable or chain is to be attached to all balancers mounted overhead to
prevent balancer from falling. Immediate hazards WILL result in severe personal injury or
death.

OPERATION

TOOL ATTACHMENT

WARNING:

Never pull cable to device to be retracted. Always lift object to hook. If the hook is
accidentally released when it is extended, it will snap back. Hazards or unsafe practices
which COULD result in severe personal injury or death.

When attaching tool to lower hook, the tool should be lifted to hook rather than pulled to the empty hook
against the reel tension. The drum lock can be engaged to prevent cable from retracting (see illustration
in “Tool Replacement”). The retaining latch on lower hook MUST be snapped back in the closed position
after tool is attached.

SPRING TENSION ADJUSTMENT

CAUTION:

Only use adjusting nut to set tension. Hazards or unsafe practices MAY result in minor
personal injury or product or property damage.

The complete tool including all attachments and connections
must be in place before adjusting spring tension. If load exceeds
spring tension, tool will move downward. If tension exceeds load,
tool will move upward. Spring tension can be adjusted by turning
the adjustment nut clockwise to increase tension or
counterclockwise to decrease tension.

SPOT BRAKE

NOTE: See “Automatic Lock” if balancer locks up.

A spot brake is provided for fine adjustment to eliminate any
“creeping” tendency. This adjustment is made only if desired
and after adjustment, as explained in “Spring Tension
Adjustment”. To adjust, loosen lock nut and back up brake
adjusting screw until the balancer works freely. Next, apply
pressure to spot brake by turning adjustment screw in until
desired setting is reached. Reset lock when adjustment is
completed.

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AUTOMATIC LOCK

NOTE: If tension is removed well below rated range of the balancer during spring adjustment, lock will engage. It

CABLE STOP ADJUSTMENT

SERVICE

TOOL REPLACEMENT

will be necessary to apply more tension to release the lock.

If a spring should break or lose tension for any reason, an automatic lock will engage to prevent drum from
turning. Lock will disengage when tension is applied to a new spring.

Adjusting cable stop is not recommended due to reduction in active travel distance, and difficulty. If
additional cable extension is required, extension cable assemblies are offered as an accessory item. In
addition, special cables are available if needed.

WARNING:

Pull tool down to the most convenient height and set manual drum lock
by lifting tab allowing pin to snap in (see illustration). This locks the
drum in place. Tool can now be removed and replaced. After replacing
tool, the drum lock can be released by pulling outward on tab and
folding it back into its original position.

CABLE REPLACEMENT

CAUTION:

Whenever cable shows signs of deterioration, it should be replaced
with a new cable. To replace cable, there is no need to
disassemble
balancer, remove tension, and/or remove it from its location. Simply
pull cable to its extreme lower limit, exposing threaded plug in the
drum as shown in the illustration. Engage manual drum lock (as
described in “Tool Replacement”) and remove tool. Remove plug
and old cable. Insert new cable and replace plug securely.
Reattach tool to lower hook and disengage drum lock.

Never release drum lock unless full load is hung on balancer. If released with no load,
hook will retract rapidly. Hazards or unsafe practices COULD result in severe personal
injury or death.

Never release drum lock unless full load is hung on the balancer. (If it is necessary to
disassemble balancer to change cable, always remove all spring tension prior to
disassembly (see Spring Tension Adjustment). Hazards or unsafe practices MAY result in

personal injury or product or property damage.

minor

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