Warner Electric H420 - Manual (Page 4)

4 Warner Electric Europe • +33 (0)2 41 21 24 24 P-2067-WE • 2/13
After removing the equipment from the shaft,
proceed as follows:
• Where the equipment is running in oil, drain it
• Manually release the equipment’s brake
• Remove the pre-assembly screws and remove
the closing plate (359) with the piston (402) and
springs (740)
Changing the disk stack:
• Remove the flange (357)
• Remove the worn disk stack
• Put the new set of disks in place, starting with
an outer disc (303 or 304), followed by an inner
disc (308 or 309) and ending with an outer disc
• Do not forget to seal fhe faces of the flange
(357) and of the closing plate (359), with an an
anareobic material (Loctite 549, for exemple)
Changing the seals:
• Do not forget to replace the back-up rings
(722)and (723) with the seals (703) and (704)
situated on the pressure chamber side
• Before reassembling, lightly oil slip surfaces
with control oil
• Reassemble the closing plate (359) with the
piston (402)
• Equipment of sizes 3200 to 12800 contain
seals (706) fitted on the flange (357) and
closing plate (359): check their condition and
change if necessary
Do not damage the seals during reassembly.
• Replace the fixing bolts in the closing plate
(359)
• Use the hub (515) to align the teeth of the
interior disc stack.
• Remove the manual braking screws and
replace the caps (939)
• Refit the brake as described in paragraph 3.3
Do not forget to tighten the fixing bolts to torque
(see Table 1) and to secure them with a Loctite
243 or equivalent type product.
5.1 Hydraulic connection 5-1Important
recommendations
Ensure compliance with the operating
pressure so as to get the equipment’s nominal
performance.
Ensure that the maximum pressure is not
exceeded (see table 1).
We recommend filtration of the control of about
10 microns so as to guarantee trouble-free run
ning and a correct life of the hydraulic
components.
The disc lubricating oil should not exceed 80°C in
operation.
5.2 Hydraulic Oils
The types of oil to use for lubricating the discs
should ful fil the following criteria:
• Good resistance to oxidation
• No additives modifying friction
• No additives that could corrode the bronze
friction surfaces (1a or 1b NF M07-015)
• Compatible with the materials used for the
hydraulic seals
• High viscosity rating (>80)
The oils listed below meet these characteristics,
this list is not exhaustive and can be added to
by other oils. The viscosity of the oil to choose
varies according to temperature and running
speed (measured on the ext. dia. of the cylinder).
Mineraloil ATF
Viscosity
Running Speed
ISO VG 22
> 12 m/s
ISO VG 32
> 12 m/s
ISO VG 46
> 12 m/s > 12 m/s
BP
ESSO
MOBIL
SHELL
ELF
Nuto H22
DTE 22
Tellus 22
Energol HLP-D32
Nuto h 32
DTE Oil Light
Tellus 32
Polytelis 32
Energol HLP-D46
Nuto H 46
DTE Oil Medium
Tellus 46
Polytelis 46
Autran MBX
AT Dexron II
ATF 220
Donax TM Elfmatic
G2”