Norco 76312 Manual

MODELS 76312 12 TON & 76320, 76720 & 76721 20 TON CAPACITY
AIR/HYDRAULIC BOTTLE JACKS
SETUP • OPERATING • MAINTENANCE INSTRUCTIONS
BEFORE USING THIS DEVICE, READ THIS MANUAL COMPLETELY
AND THOROUGHLY, UNDERSTAND ITS OPERATING PROCEDURES,
SAFETY WARNINGS AND MAINTENANCE REQUIREMENTS. FAILURE
TO DO SO COULD CAUSE ACCIDENTS RESULTING IN SERIOUS OR
FATAL PERSONAL INJURY AND/OR PROPERTY DAMAGE.
The use of portable automotive lifting devices is subject to certain hazards
that cannot be prevented by mechanical means, but only by the exercise
of intelligence, care, and common sense. It is therefore essential to have
owners and personnel involved in the use and operation of equipment who
are careful, competent, trained, and qualied in the safe operation of the
equipment and its proper use. Examples of hazards are dropping, tipping, or
slipping of motor vehicles or their components caused primarily by improperly
securing loads, overloading, o󰀨-centered loads, use on other than hard level
surfaces, and using equipment for a purpose for which it was not designed.
It is the responsibility of the owner to make sure all personnel read this
manual prior to using this device. It is also the responsibility of the device
owner to keep this manual intact and in a convenient location for all to see
and read. If the manual is lost or not legible, contact Norco Industries, Inc.
for a free replacement. If the operator is not uent in English, the product
and safety instructions shall be read to and discussed with the operator in
the operator’s native language by the purchaser/ owner or his designee,
making sure that the operator comprehends its contents.
WARRANTY
This product is covered by a Limited Lifetime Warranty. For details see the
back cover of Norco’s product catalog or visit www.norcoindustries.com.
IMPORTANT: READ THESE INSTRUCTIONS BEFORE OPERATING
WARNING
• Before lifting a vehicle, refer to the vehicle’s service manual or inquire
from the vehicle manufacturer the recommended jack lifting points and
jack stand support surfaces on the vehicle chassis.
• Inspect the jack before each use. Do not use the jack if it is damaged,
altered, modied, in poor condition, leaking hydraulic uid, or unstable
due to loose hardware. Take corrective action before using the jack.
• This jack was designed for lifting purposes only. Do not attempt to work
on the vehicle until jack stands rated equal to or greater than the rated
capacity of the jack are positioned to support the load.
• Do not move or dolly the vehicle while on the jack.
• Do not use the jack beyond its rated capacity. Lift only dead weight.
• Do not exceed 130 P.S.I. input air pressure.
• Center load on saddle. Be sure setup is stable. O󰀨-center loads can
cause jack failure and/or loss of load.
• Use the jack on a hard level surface.
• Do not modify the jack or use saddle adapters or saddle extenders
unless approved or supplied by Norco.
• Do not position any part of your body directly above the lifting saddle
when operating the jack.
• When activating the jack with no load, the ram raises quickly, therefore
never put your hands or any other part of your body between the lifting
saddle and the load.
• Do not use the jack in horizontal or angular positions.
• Always lower the jack slowly and carefully.
PROFESSIONAL LIFTING EQUIPMENT
®
IMPORTANT: Remove and discard the round red sticker covering the air vent hole on the top of the air motor.
Failure to remove this sticker will prevent the air motor from operating properly.
SETUP
Note: Revision letters (A, B, C, D etc.) after model numbers have been omitted as they do not a󰀨ect the setup,
operating and maintenance instructions of a particular jack unless otherwise noted.
PURGING AIR FROM THE HYDRAULIC SYSTEM
Sometimes the jack is shipped, handled or stored in a position other than
vertical. This may cause air to be trapped in the pump and cause the
ram to raise in increments instead of a smooth travel. To eliminate this
condition perform the following steps:
1. Purge the air by turning the release valve knob two full turns in a
counterclockwise direction from its closed position.
2. Then depress the air valve button for about 10 seconds.
3. Turn the release valve knob in a clockwise direction until it stops and is
snug. The jack should function properly.
Repeat steps 1 through 3 until the jack’s operation is satisfactory.
PURGING HYDRAULIC OIL FROM THE AIR MOTOR
Hydraulic oil can get into the air motor if the jack is handled or stored in
a position other than vertical. This will cause a combination of air and
hydraulic oil to be forced out of the air vent hole on the top of the air
motor. To eliminate this condition perform the following steps:
1. Place the jack in a vertical position and hook it up to an air source.
2. Activate the push button air valve to force the air/hydraulic oil mixture
from the air motor. (Note: Depending on how much hydraulic oil is in the
air motor will depend on how long you have to continue to activate the
push button air valve. If a lot of hydraulic oil is in the air motor it could
take up to a dozen full stroke activations of the jack to remove all the
hydraulic oil.) The air/hydraulic oil mixture will continue to come out of the
air motor’s air vent hole until all the hydraulic oil is purged. Then only air
will vent through this hole.

OPERATING INSTRUCTIONS
CAUTION For Your Safety: This jack was designed for jacking purposes
only. After jacking always use safety stands to support the load before
making repairs.
1. Chock the vehicle’s tires that will not be lifted o󰀨 the ground prior to lifting
the vehicle and if available, apply the emergency brake or any other method
of braking.
2. The air motor is designed to work at maximum e󰀩ciency between 100
and 130 p.s.i. system air pressure. It will be necessary to have between 100
and 130 p.s.i. air pressure at the pump in order for the jack to lift its maximum
capacity. DON’T use the air hose to pull the weight of the jack as it
may cause damage to the ttings and/or air hose. DON’T neglect the
components, ttings, adapters, and hoses by rough handling of the jack.
CAUTION For Your Safety: Use jack on hard level surface, center the load
on the saddle and make sure the setup is stable. Poor operator judgement
and/or unstable setup could cause load to slip o󰀨 the jack saddle and cause
personal injury and/or property damage.
3. Position the jack under the load and determine how much stroke is
required to lift the load to the required height. Any ram stroke used to raise
the extension screw saddle to the load reduces your lift stroke. The extension
screw saddle is used to make up the distance between the saddle and the
load so that you will have the most available hydraulic ram stroke. DON’T
use the ram without the extension screw saddle as this could cause
damage to the counterbore of the ram. This paragraph does not apply to
Model 76721.
4. Close the release valve knob by turning it in a clockwise direction
until it stops and is snug. IMPORTANT: Use the vehicle manufacturer’s
recommended lifting procedures and lifting points before lifting loads.
5. Depress the air valve button to raise the saddle to the load. Before lifting
the load make sure the saddle is centered on the load and the setup appears
stable. If not, reposition the jack and saddle contact with the load until the
setup is stable. DON’T use the jack in unstable setup conditions as the
load could slip o󰀨 the saddle and cause damage to jack components
and cause personal injury and/or property damage.
6. Depress the air valve button to lift the load to the desired height. During
lifting, inspect the position of the jack in relationship to the ground and the ram
in relation to the load to prevent any unstable conditions from developing. If
conditions look like they are becoming unstable, slowly lower the load and
make the appropriate setup corrections after the load is fully lowered.
7. When the vehicle or load is lifted to its desired height, immediately place
safety support stands (jack stands) in their designated locations and adjust
the stands’ support columns up as close to the designated vehicle support
points as possible. Although jack stands are individually rated, they are to be
used in a matched pair to support one end of a vehicle only. Stands are not to
be used to simultaneously support both ends or one side of a vehicle. Slowly
and carefully turn the release knob in a counterclockwise direction to gently
lower the vehicle onto the safety support stands (jack stands). Make sure
the vehicle is safely supported by the safety support stands’ (jack stands’)
saddles and not the locating lugs of the saddles. Inspect the relationship
of the safety support stands (jack stands) with the ground and the safety
support stand (jack stand) columns and saddles with the vehicle to prevent
any unstable conditions. If conditions look unstable, close the jack’s release
knob and depress the air valve to raise the vehicle o󰀨 the safety support
stands (jack stands). Make the appropriate setup changes and slowly and
carefully lower the vehicle onto the safety support stand saddles.
8. After the work is done, close the release knob and depress the air valve
until the jack is high enough to remove the vehicle or load from the safety
support stand saddles. Be sure load is stable. If it is not, lower load back onto
safety support stands. Make appropriate setup corrections and repeat the
step again. Remove the safety support stands from under the vehicle being
very careful not to move the vehicle.
9. The jack should be stored in its normal use position. NOTE: The jack
is designed with an additional air line that adds pressure to the oil in the
reservoir and forces the oil into the hydraulic pump. The air line is vented by
way of a hole located in the top of the air motor. Oil from the reservoir can
seep out of the hole if the jack is used or stored with the handle assembly end
of the jack pointing or angling down. Excessive leaking from this hole could
reduce the required oil level in the reservoir and render the jack inoperable.
Slight or occasional leakage from this hole should not cause any concerns.
IMPORTANT: The oil ll level should be no higher than one inch
below the air inlet on the oil reservoir when the ram is completely
retracted. Use hydraulic jack oil or turbine oil only.
REPAIR SERVICE
If your Norco product requires service or repair, contact the Norco Customer
Service Department for the location of the nearest Norco Authorized
Service Center.
Norco Industries, Inc.
365 West Victoria St.
Compton, CA 90220
[phone] • Fax: [phone]
www.norcoindustries.com
It will be necessary to provide the Norco Authorized Service Center with
a copy of the bill of sale if requesting warranty repair. If the authorized
service center determines your product is eligible for warranty repair, the
repair will be made at no charge and returned freight prepaid. The cost
of non-warrantable service, repair, and return freight is the customer’s
responsibility.
76312 / 76320 / 76720 / 76721
1. Always store the jack in a well protected area where it will not be
exposed to inclement weather, corrosive vapors, abrasive dust, or any
other harmful elements. The jack must be cleaned of water, snow, sand,
or grit before using.
DAILY
1. Check the condition of all moving parts and replace or repair when necessary.
2. Check the condition of the air hose and replace when necessary.
3. Check for external hydraulic uid leakage and correct the problem immediately.
MONTHLY
All checks mentioned in the “Daily Maintenance and Inspection”
procedures must be conducted.
1. Do not lubricate any portion of the lift saddle and make sure the saddle
is free from grease, any kind of lubricant, or debris before using the jack.
2. Remove the in-line lter and clean the debris from the lter element and
inside the lter housing.
3. Remove any signs of rust and lubricate (except on saddle) the area to
inhibit further rusting.
4. It should not be necessary to rell or top o󰀨 the reservoir with hydraulic
uid unless there is an external leak. An external leak requires immediate
repair which must be performed in a dirt-free environment by qualied
hydraulic repair personnel who are familiar with this equipment. Norco
Authorized Service Centers are recommended. IMPORTANT: In order
to prevent seal damage and jack failure, never use alcohol, hydraulic
brake uid, or transmission oil in the jack. Use Chevron Hydraulic Oil
AW ISO 32 or its equivalent Unocal Unax AW 150.
5. Every jack owner is responsible for keeping the jack label clean and
readable. Use a mild soap solution to wash external surfaces of the jack
but not any moving hydraulic components.
6. Do not attempt to make any hydraulic repairs unless you are a qualied
hydraulic repair person that is familiar with this equipment.
PREVENTATIVE MAINTENANCE