791-9006 3 08/19/18
SETUP INSTRUCTIONS
PLEASE REFER TO THE EXPLODED VIEW DRAWING IN THIS MANUAL IN ORDER TO IDENTIFY PARTS.
1. Place the hydraulic power unit (#65) in an upright position. Secure the legs (#33) to the pump base (#41) with the flat washers
(#35), lock washers (#36) and bolts (#37) as shown in the exploded view drawing on page 8. Do not tighten the bolts.
2. Secure the two casters with brake (#40) on the caster mounting brackets as shown in the exploded view drawing with the flat
washers (#57), lock washers (#39) and nuts (#38). Secure the other casters (#34) to the other caster mounting brackets with
similar hardware.
3. Slide the support ring (#63) over the top of the power unit (#65) and just below the reservoir cap (#19). Hold the cap in position
by finger tightening the bolt (#62). Attach the four support bars (#64) to the support ring (#63) with the bolts (#59), lock washers
(#60) and nuts (#61). Do not tighten.
4. Loosely thread the nuts (#51) on to the adjusting bolts (#52) and thread the bolts in to the bottoms of the support bars (#64)
about ½” of thread length. Align the position of the support bars (#64) and how they are attached with the support ring (#63)
with the receiving ears on top of the caster mounting brackets at the ends of the legs (#33). Make sure the jack is sitting on a flat
surface so all four caster wheels are making contact with the floor and tighten the mounting hardware that secures the legs
(#33) to the pump base (#41). Once all components are properly aligned, tighten the bolt (#62).
5. Align the adjusting bolts (#52) with the ears on the caster mounting brackets and adjust their length so the holes in the bolts
align with the holes in the ears. Attach the bolts to the ears with the bolts (#59), lock washers (#60) and nuts (#61). Tighten all
hardware mentioned in previous steps.
6. Thread the nuts (#51) up against the bottom of the support bars(#64) and tighten.
7. Secure the saddle assembly (#56) to the jack’s second stage piston rod (#6) with the bolt (#S08).
8. Secure the handle (#24) to the reservoir (#21) with the pin (#22) and cotter pin (#23) provided.
9. VERY IMPORTANT: Before operating the jack, turn the breather screw (#26) counterclockwise until it stops.
Failure to open the breather screw will prevent the jack from pumping normally.
10. Install the air disconnect of your choice in the air valve (#P53). Make sure to use pipe dope tape to seal off the threads and
prevent any tape from entering the air system.
11. Sometimes air gets trapped in the hydraulic system during shipping and/or handling. Evidence of an air bound system is a
spongy feeling during the foot pumping operation, or a ram will not rise to maximum extension, or the ram will not rise
proportionate to a full incremental pump stroke. Follow these instructions:
AIR PURGING INSTRUCTIONS
If the jack does not raise the load or raises it very slow as a result of activating the pump pedal (#47), there may be air trapped in the primary
ram and hydraulic circuitry.
1. Loosen the breather screw (#26)
by turning it counterclockwise
until it stops.
2. Loosen the M6 X 5 Allen
socket screw in the top of the
pump piston block ½ turn in a
counterclockwise direction.
Activate the pump pedal (#47) very
slowly until you see hydraulic fluid
escaping from the M6 X 5 screw
hole. Hold pressure on the
pump pedal and simultaneously
tighten the M6 X 5 screw.
3. Make sure the release handle (#53)
is closed and activate the pump
pedal to see if the condition
has been eliminated. If better
but not eliminated, repeat steps 1
through 3 several times.
OPERATING MANUAL FOR 791-9006
P53
53
26
47
5
4
65
M8X10
SCREW
M6X5
SCREW
