MAN16MG05
instructions
for
use
series
drh
1/2/3/4 -
dst
/
n
/
s
-
dst
/
r
-
drt
90
• The pulleys of the hook block or return must be examined in the following way:
• Examine every single pulley in rotation and ensure normal functioning; if anomalies are found, disassemble
it and check the bearing
• Check for wear of the throat
• Check that the pulleys rotate freely. The pulleys of the hook block can easily be checked visually by
observing the inclination during ascent and descent, with no load.
• Once cleaned, the rope drum must be carefully checked to verify:
•
The tightening of the screws of the rope fixing clamp and the state of wear of the rope race of the rope drum
• The integrity of the thread of the drum, rope guide, slides and of the rope-grip spring
• That there is no clearance in the bearings, both in a radial and axial direction, by levering between the
drum and the lower stay bolt
• Correct operation of the rope guide and of the bronze reaction arms. (There must not be excessive
clearance or jolting movements)
Quarterly check of the efficiency of the pulleys
(hook block and/return) - (fig. 135):
Quarterly check of the efficiency of the rope drum shell/rope guide
(fig. 136):
Substitute the pulleys if they show:
• a reduction of the diameter of the throat > 5%
• for replacement procedures contact the technical assistance service at DONATI
SOLLEVAMENTI S.r.l.
• If worn, replace the components of the rope guide. (see point 6.6.1)
• It is forbidden to carry out corrective maintenance on the rope drums
• Any extra maintenance work on the rope drums must be carried out by the assistance
service of DONATI SOLLEVAMENTI S.r.l. or by staff authorised by them.
DONATI TECHNICIAN
DONATI SERVICE
fig. 135
fig. 136
91
instructions
for
use
series
drh
1/2/3/4 -
dst
/
n
/
s
-
dst
/
r
-
drt
MAN16MG05
• Check that the noise produced by the reducers does not show variations of intensity. Excessive vibrations or
noise indicate wear of the teeth or bearing failure
• Check there are no lubricant leakages
• Clean the motor of the hoist or trolley, eliminating dust from the casing which could hinder normal cooling; check
that the ventilation inlets and outlets are not blocked
• Using a nominal load, check that no abnormal noises are heard (humming, rubbing)
• Check that the temperature of the casing does not reach more than 110°C. If it does, look for the causes and
verify the operations which the hoist was made for (see point 6.7 “Breakdowns and solutions”)
• Check the absorption and voltage by comparing them with the nominal values indicated on the plate of every
motor (also see motor information in point 2.2.10 of this publication)
Monthly check of the efficiency of the hoist and trolley reducers
(fig. 137):
Quarterly check of the efficiency of the hoist and trolley motors
(fig. 138):
WARNING:
• The reducers are lubricated for life and do not need any maintenance or lubricant
added
IN CASE OF ANOMALY:
• It is forbidden to carry out corrective maintenance on the lifting or translation
reducers
• Any extra maintenance work on the reducers must be carried out by the assistance
service of DONATI SOLLEVAMENTI S.r.l. or by staff authorised by them
DONATI TECHNICIAN
DONATI SERVICE
IN CASE OF ANOMALY:
• It is forbidden to carry out internal corrective maintenance on the lifting and
transverse motors
• Any extra maintenance work on the lifting and transverse motors must be carried out
by the assistance service of DONATI SOLLEVAMENTI S.r.l. or by staff authorised by
them.
DONATI TECHNICIAN
DONATI SERVICE
fig. 137
fig. 138
KMAN16MG05
Summary of Contents for DRH 1 Series
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