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3. Check button on side of u-frame pawl for excessive wear. Its width
should be approximately 1
½ times the diameter of the main frame
pawl spring. Place reverse lever in lowering position, move u-frame
until pawl button comes in contact with spring. If the button is not worn
excessively and slips past the spring, its alignment can be corrected
by placing a spacer washer between u-frame pawl and snap ring.
4. If, in the above test, the pawl button contacted the main frame pawl
spring and guided the u-frame pawl in to the ratchet wheel, then test
the main frame pawl spring for fatigue. With the reverse lever in lowering
position and the hoist under light tension, place handle in full lowering
position so the u-frame pawl engages the ratchet wheel. If the main
frame pawl does not release continue pressing on the handle and at
the same time press on the “trigger”. If “trigger” pressure releases the
main frame pawl, but spring pressure does not, it indicates the spring
is fatigued and should be replaced.
5. If, when the above test is made, pressure on the “trigger” does not
release the main frame pawl, test the u-frame pawl for excessive
wear. To test, place an object (knife blade, nail, paper clip, etc.) between
the u-frame pawl and the tooth it would normally engage for lowering.
If it lowers one notch under this test with the unit under light tension
then the trouble is located. This condition is more likely to develop
after a LUG-ALL has been repaired and a new main frame pawl installed
but not a new u-frame pawl. Under normal conditions the two pawls
wear evenly and seldom give any difficulty.
6. Check both u-frame and main frame pawls for “snappy” spring action.
Sluggish action can result from dirt or corrosion on the shafts and in
the shaft holes. Remove shafts and clean with fine steel wool. Clean
shaft holes in pawls, u-frame and main frame (equipped with oilite
bearings on rapid lowering models). Apply light oil on all bearing
surfaces and reassemble.
7. Check to see that both pawls engage solidly at the base of the ratchet
teeth in both lifting and lowering cycles.
8. If main frame pawl on rapid lowering model does not fully engage,
check actuating pin and edge of projection on rapid lowering assembly
that engages the actuating pin to see if it is bent.
9. The u-frame pawl should align with the ratchet teeth, if it does not
check to see if the u-frame is twisted from someone having let go of
the handle while handling a load.
TROUBLE SHOOTING
If your LUG-ALL will not lower or back off automatically, the
following tests can be made:
1. Inspect cable on drum to see that it is not “wedged” or “jammed”. Test
by operating free release (see page 12).
2. Examine u-frame pawl spring. With the reverse lever in lifting position
spring should hold pawl
against ratchet teeth. In lowering position
spring should hold pawl
away from the ratchet teeth.
