791-7140 D
3
rev. 4/3/18
SETUP INSTRUCTIONS
This is the safety alert symbol used for the SETUP INSTRUCTIONS section of this manual to alert you to potential personal injury
hazards. Obey all instructions to avoid possible injury or death.
PLEASE REFER TO THE EXPLODED VIEW DRAWING IN THIS MANUAL IN ORDER TO IDENTIFY PARTS.
1. Place the hydraulic power unit in an upright position. Secure the legs (index #2-5) to the cylinder (index #1-1) with the bolts (index #2-3)
and washers (index #2-4). Do not tighten.
2. Secure swivel casters (index #2-1 and #2-2) to leg caster brackets as shown in the exploded view drawing on page 5.
3. Tighten the hardware that secures the legs (index #2-5) to the cylinder (index #1-1).
4. Place the saddle assembly (index #3-31) on the stud protruding from the top of the hydraulic unit assembly. Align the hole in the saddle
with the hole in the stud, and secure with the bolt (index #3-26) and nut (#3-27).
5. The hydraulic power unit is equipped with two reservoir fill screws (index # 1-37 and 1-38). The closed filler screw is installed in the
reservoir at the factory so the jack will not leak during shipment.
IMPORTANT:
REPLACE THE RESERVOIR FILLER SCREW WITH THE VENTED RESERVOIR SCREW BEFORE USING THE JACK.
6. Sometimes air gets trapped in the hydraulic system during shipping and/or handling. Evidence of an air bound system is when pumping
the foot pedal feels spongy and/or the jack will not pump full incremental strokes.
PURGING AIR FROM THE HYDRAULIC SYSTEM:
a. Depress the release foot pedal while simultaneously pumping the jack
about 15 incremental pump strokes.
b. Remove your foot from the release pedal and pump the jack to maximum
extension.
c. If the secondary ram seems to be spongy or does not pump up normally,
insert an Allen wrench in the small Allen socket set screw in the side of
the secondary cylinder nut. (See Figure 1) Slightly turn the set screw in a
counterclockwise direction while lightly depressing the pump pedal. This
procedure is similar to bleeding air out of an automotive brake line. Repeat
the procedure until there are no bubbles in the oil that escapes from
behind the Allen socket set screw.
d. Close the Allen socket set screw by turning it in a clockwise direction until
tight. Repeat steps "a" and "b".
e. Repeat steps "a" through "d" until air is purged from the system.
OPERATING INSTRUCTIONS
This is the safety alert symbol used for the OPERATING INSTRUCTIONS section of this manual to alert you to potential personal
injury hazards. Obey all instructions to avoid possible injury or death.
1. Lift the vehicle to the desired work height and support the vehicle in accordance with the lift manufacturer's recommended support
procedure and all the instructions and warnings in this manual.
2. Use an under hoist stand rated greater than the weight of the engine to support the engine before unbolting the transmission from the
engine or bolting the transmission to the engine.
3. Position the transmission jack directly under the transmission. Depress the large foot pedal up and down in order to raise the saddle to a
height very close to the center of balance point of the transmission oil pan but do not touch the transmission.
4. Adjust the ratchet arms on the saddle so that the bent up section of the arms will fit in the mounting flange around the perimeter of the
transmission oil pan. Slowly and gently pump the jack so the connection is made and then secure the transmission to the jack's saddle
with the tie down strap provided. Sometimes it is necessary to turn the fore and aft and side to side tilt knobs so the saddle is in the
proper alignment with the transmission pan before securing the load to the saddle.
5. Make sure the tie down strap is very tight when securing the transmission to the saddle and before raising or lowering the transmission.
6. Remove the transmission from the engine according to instructions in the vehicle service manual.
7. Once the transmission has been disconnected from the engine, very slowly depress the release pedal to make sure the jack's saddle and
transmission do not hang up on any undercar components, wiring, fuel lines, etc. Continue to lower the jack all the way down.
8. When installing a transmission, follow the above instructions but in the applicable order and according to the vehicle manufacturer's
installation procedure.
PREVENTATIVE MAINTENANCE
This is the safety alert symbol used for the PREVENTATIVE MAINTENANCE section of this manual to alert you to potential personal
injury hazards. Obey all instructions to avoid possible injury or death.
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, grit, oil, grease or other foreign matter before using.
2. Lubricate moving parts, excluding the telescopic rams, monthly with a general purpose grease. Periodic lubrication should be
subject to a maintenance schedule based on frequency of use. A weekly lubrication inspection is suggested.
OPERATING MANUAL & PARTS LIST FOR 791-7140 D
Location of
Allen socket set
screw in secondary
cylinder nut
Figure 1
