Disassembly Instructions for Periodic Inspection
and Repair or Replacement of Parts for One-Ton Hoist
5
In order to best visualize these
instructions, study and refer to the
exploded view of the hoist.
7. In replacing the housing dog, make
1. Remove bolt (P001-0997) from
shaft (P309-0791). Remove cap
(P309-0822), washer (P001-1485)
& spacer (P309-0325) if used.
2. Push "release key" (P309-0346) in
the indented area of the handle in
the direction marked "release" to
disengage the handle dog (E309-
0354) from the unloader plate
and lift handle (P309-0816) off
the shaft. This will expose the
mechanism.
3. The housing dog (E309-0354) may
be removed by first removing
screw (56013) and washer (56014)
from the post supporting the dog.
Torsion spring (56010) can be re-
moved, after the dog, if needed.
4. When reassembling handle dog
(E309-0354) and spring (56010),
place the short leg of the spring
to the pin on the dog, and the long
leg of the spring against handle
housing (P309-0816).
5. If necessary to replace the dog
post (PSP309-0910) or release key
(P309-0346) remove nut (56748)
and press the dog post out of
housing (P309-0816) with a care-
ful and steady force. In replacing
the new dog post, be certain it is
pressed in straight, using an even
pressure, and that release key is
in position before pressing post
into housing.
6. The housing dog (E309-0354) can
be removed by unhooking the long
extension spring (56009) from the
unloader plate (E309-0356) and
screw (56163) in the housing and
the short extension spring (P309-
0352) from the dog post and spring
anchor pin (P309-0347). Remove
snap ring (56011) and remove
unloader plate and lift dog (E309-
0354) off post.
To remove Interlocking Snap Ring,
pry one end apart using screwdriver.
Parts may fly away when Ring un-
snaps.
To reassemble, follow these instructions
in the reverse manner replacing parts
in the same position as noted when
removed. It is important that the hoist
be inspected, cleaned, and relubricated
periodically depending on working con-
ditions.
sure the pin which is permanently
secured to the dog is faced to the
To reinstall, hook one end and close
with pliers.
outside, so that it will project
through the unloader plate, when
unloader plate is replaced on the
shaft.
8. To remove shaft (P309-0791) (the
ratchet gear and chain socket are
integral), remove ring (056871)
and free the end of the chain
(19353). This will allow the chain
to be "pulled" through the housing.
Then by removing interlocking
snap ring (56011), the shaft can
be slid through its bearing.
9. Hook (19562) is assembled to
housing (P309-0476) and the nut
is pinned in place. If hook is to be
replaced, it must be sawed through
shank adjacent to the top of the
housing.
10. The shift key (P309-0043) can
be removed by backing out the
drive-lock pin (59036) holding
the shift key finger (19296) to the
shift key.
11. The Oilite bearings (58613, 58614,
19305) can be removed and re-
placed by pressing them out and
pressing the new ones in.
Periodic Maintenance
The hoist is designed to provide rugged
service. Initiating a program of periodic
inspection, cleaning, and repair will in-
crease the service life of the hoist.
Time intervals between routine clean-
ing and inspection will depend entirely
upon severity of usage and the environ-
ment in which the hoist is operated. A
program of regular maintenance can
best be determined by the user to suit
his particular needs.
degree of mechanical aptitude. Sound
judgment must be exercised in determin-
ing degree or extent of repairs necessary.
Replacing a single faulty part in an other-
wise worn assembly is not as desirable as
an an extensive rebuild. Hoists returned
to the A. B. Chance Company for repair
are thoroughly cleaned, checked, and
rebuilt to "near new" condition.
Without question, any hoist not func-
tioning properly or showing external
damage should be tagged as defective
and sent to the repair area.
Extensive repairs should be attempted
only by personnel with a reasonable
