EATON HEVC 5005
Installation, Operation and Maintenance Manual E-CLCL-CC002-E2
May 2017
13
3.2.5.1 The flow rate is increased by turning the flow control
valve adjusting screw clockwise or counterclockwise.
Follow the manufacturers operation requirements.
Contact Airflex engineering if needed.
3.2.6
Manually engage the clutch several times to verify
the flow control valve setting. Also, confirm operation
of the pressure switches at this time.
3.2.7
Check all other interlocks that affect the starting
of the mill and remove any jumpers that may have
been installed.
Caution
The flow rate described typically will result in
a 4-7 second mill acceleration time (timed from the
instant the clutch shoes make contact with the drum
to the instant the clutch locks up); however, since
operating characteristics vary from mill to mill, the
mill acceleration at the above flow setting may be
greater or less than the allowable 4-7 second range.
Note: For longer mill acceleration time beyond allowable 4-7
seconds range contact Airflex engineering.
Caution
The sintered friction material used on Airflex HEVC
clutches may not develop rated torque initially, as a
short “wear-in” period is required. It is very
important that the first few mill starts be monitored
closely to prevent damage to the clutch components.
3.2.8
Start the motor and engage the clutch, noting the mill
acceleration time. Abort the start if the clutch slips
for more than seven seconds!
3.2.9
Disengage the clutch (if the start has not been
aborted) and allow the drum(s) to cool to room
temperature. Make the appropriate adjustment
to the flow control valve if the mill acceleration
fell outside of the 4-7 second range and retry.
Repeat until the desired acceleration time has
been achieved.
Note : If the motor overload is beyond allowable limits during the
start (typically the result of too high operating pressure), reduce
the operating pressure and increase the flow rate. If the motor is
sized correctly for the mill load conditions, the overload on the
motor is directly proportional to the applied air pressure - not
the flow rate.
4.0 Maintenance
Warning
Only qualified personnel should maintain and repair
these units. Faulty workmanship may result in
personal injury or equipment damage.
HEVC 5005
Caution
When replacing clutch components, use only
genuine, Airflex replacement parts. Use of
replacement material which is not of Airflex
origin will void all warranties.
4.1
Periodic inspection
4.1.1
The following items may be inspected without
disassembly of the clutch.
4.1.1.1 Friction shoe assembly lining wear - Check the
lining thickness and compare to the values
shown on Table 5. If the linings have worn to
minimum allowable thickness or less, they must
be replaced as a complete set.
Caution
Operation with friction material worn to less than
minimum allowable thickness will result in damage
to the drum.
Table 5
Friction material thickness
Element size
Min. allowable
lining thickness,
inch (mm)
Original lining
thickness, inch
(mm)
DW28HEVC1000
.12 (3.05)
.28 (7.11)
DW51HEVC1600
.15 (3.68)
.34 (8.64)
DW60HEVC1600
.14 (3.68)
.34 (8.64)
DW66HEVC1600
.14 (3.68)
.34 (8.64)
DW76HEVC1600
.12 (3.05)
.34 (8.64)
DW76HEVC2000
.12 (3.05)
.34 (8.64)
Figure 9
