4
5
Amount supplied at factory as follows:
Jack capacity
Lube [oz.]
MJ
0.8
1 Ton
1.6
2 Ton
4
2 1/2 Ton
4.5
5 Ton
11
10 Ton
14
15 Ton
15
20 Ton
24
30 Ton
48
35 Ton
48
50 Ton
92
75 Ton
144
100 Ton
256
All units are suitable for intermittent opera-
tion providing that the housing tempera-
ture including ambient is not lower than
-20°F or higher than +200°F. Factory sup-
plied grease in standard units will operate
in this range. Consult factory for available
low-temperature greases when operating
below -20°F.
Lifting screws should be checked periodi-
cally to insure they are adequately lubricat-
ed. This is especially necessary in rotating
units where no lubrication is deposited on
the lifting screw through the jack housing.
CAUTION
- The user is responsible to in-
sure lubricant compatibility. If improper
lubricant is used or insufficient lubrication
maintained, this will lead to degraded per-
formance and failure.
INSTALLATION INSTRUCTIONS
1. Be certain that the rating of the jack
exceeds the maximum load that may
be imposed upon it.
2. The foundation for the unit must
be rigid enough to maintain correct
alignment with connected machinery
Torque values for bolting are as follows:
Bolt Size
(in)
Approx.Torque Value
(ft-lb)
1
⁄
4
6
3
⁄
8
20
1
⁄
2
50
5
⁄
8
100
3
⁄
4
165
7
⁄
8
265
1
400
1
1
⁄
4
830
1
1
⁄
2
1350
1
3
⁄
4
2500
2
3650
IMPORTANT
- Take up evenly on mounting
bolts to avoid damaging the housing.
9. If operating at the upper limits of the
unit rating, DO NOT STOP the down-
ward travel of the unit by running the
lifting screw attachments or the load
against the housing without check-
ing with Nook Industries, as serious
damage to the internal mechanism
may result. The customer is respon-
sible for providing mechanical stops
and switches for control of the prime
mover. Noneare included unless spe-
cifically quoted by and ordered from
Nook Industries.
CAUTION
- If limit switches are furnished
by Nook Industries, they are NOT factory
set. Limit switches should be set by care-
fully moving to the set position by hand or
jogging. Care must be taken to avoid run-
ning lifting screws out of units or crushing
boots.
TIPS FOR DISASSEMBLY
AND REASSEMBLY
CAUTION -
Disassembly of the actuator
will void the warranty
.
Never perform any work on the jack or as-
and have ample strength to carry the
maximum load.
3. The foundation should have a flat
mounting surface to uniformly sup-
port the jack unit. The opening for the
lifting screw cover (or lifting screw)
that passes through base must be as
small as possible to provide jack sup-
port over the largest possible area.
4. It is extremely important that the jack
be installed so that the lifting screw
is exactly plumb and that all connect-
ing shafting is aligned with the worm
shaft.
5. After precise alignment, each mem-
ber must be securely bolted and if
possible, doweled in place. Doweling
will assure exact repositioning if ever
removed. It is essential that a jack
unit be securely bolted down to its
foundation using bolts of the proper
diameter to fit mounting holes. Bolts
should be S.A.E. Grade 5 or equiva-
lent.
CAUTION
- In the case of rotating units it
is essential, for proper alignment and pre-
vention of screw failure, that the load be
attached to the traveling nut only when the
load is in the position of travel closest to
the jack housing
6. After the Jacks, mitre boxes, cou-
plings, etc. are installed and aligned,
there should be no signs of binding or
misalignment.
7. Shaft coupling guards are the respon-
sibility of the customer and are not
provided unless specifically quoted
to and ordered by the customer.
8. Caution must be taken when operat-
ing jack at either extreme of travel. If
possible, hard external stops should
be provided.
sociated transmission equipment (mitre
boxes, couplings, etc.), until absolutely
certain that the prime mover cannot be re-
motely or automatically started. Also make
certain that load cannot affect personnel or
machinery when the Jac, brake, or other
holding devices are removed. Be sure dis-
assembly area is relatively clean to prevent
contamination of parts. Store all machined
parts on wooden blocks or skids to prevent
damage to machined surfaces.
Before starting disassembly, carefully re-
view a typical parts list or certified assem-
bly drawing of the unit.
When removing end caps, be sure to tape
shaft extension keyways and other sharp
edges to avoid damaging oil seals.
NOTES:
1. Be sure to clean and dry all parts be-
fore rebuilding.
2. It is advisable to replace old seals
when the unit is rebuilt.
3. Remove any protective coatings on
replacement parts before installing.
DISASSEMBLY INSTRUCTIONS
1 MSJ through 100 MSJ Models Only
Refer to typical parts, pages 6-7. No MJ
models are serviceable in the field. These
instructions are necessarily general, and
as such, cannot provide for minor details
of construction, which may vary from unit
to unit. For specific questions, consult fac-
tory giving order number and serial num-
ber from unit name plate.
Upright or Inverted Units
Disassembly
1. Unscrew lifting screw cover assem-
bly from unit.
2. Remove protective boot and end at-
tachment from lifting screw, if appli-
cable.
