Warner Electric H420 - Manual (Page 3)

Warner Electric Europe • +33 (0)2 41 21 24 24 P-2067-WE • 2/13 3
3 Installation
3.1 Transport / storage
The brakes are supplied in packaging
guaranteeing a preservation period of 6 months
with land or air transport, or after transport by
ship to neighbouring continents (with out crossing
the tropics).
3.2 Handling
The brake is supplied assembled, the hub (515)
pre centred in place.
Be careful not to release the disk stack before
assembly.
Avoid any impacts on the equipment so as not to
alter their performance.
3.3 Installation
The hub (515) is normally supplied to H7
tolerances for bore and P9 for the width of the
keyway (in accordance with NF E 22-175 / DIN
6885 / BS 4235 / ISO R773).
• Locate the hub on the shaft (after adjusting the
key) and fix it axially
NB: For VAR00 sizes 90 / 150 / 250 and VAR01
sizes 150 / 220 / 330, the hub (515) should be
fitted in the right direction: the largest diameter
towards the shoulder of the shaft.
• Slide the equipment into position in the
centring provided, having first directed the
supply to the top position of the vertical axis,
while presenting the hollows of the steel or
sintered inner disc (308) or (309) opposite to
the hub teeth (515)
• Pivot the assembly until the fixing holes
coincide with the bolt ways in the brake.
• Fix the brake with the bolts provided for the
purpose
Do not forget to tighten the locking screws (909)
to the torque (table 1) and to secure them with a
Loctite 243 type or equivalent product.
• Connect the hydraulics (see table 1)
In the case of operation in oil only:
• Remove the filling cap (937) and oil level cap
(939) (the lowest of the plugs located at the
back). Pour in the oil (see chap. 5 for the
choice) up to the level required. Replace the
caps
3.4 Manual Release
Brakes in the H420 range can be released
manually so as to put the brake out of operation,
in the event of a fault in the hydraulic circuit
or for maintenance. To do this, the caps (939)
must be removed so as to access the tapped
holes provided in the piston (402). Fit a set of
bolts (given in table 1) and screw them right in to
compress the springs.
4 Maintenance
4.1 Maintenance
There is practically no wear on the discs of units
in the H420 range if the running conditions are
complied with (operation in oil, oil temperature,
rotation speed, etc.). Disc wear is automatically
compensated for, up to the wear limit, by the
movement of the piston. It is however necessary
to:
• Regularly check the piston seal (402) and in the
event of a leak or after 5 years use, change the
seals (703, 704) and back-up rings (722, 723)
In the case of operation in oil only:
• Change the oil after 40 h running from first use,
then every year of normal running.
4.2 Spare parts
For all orders of spare parts, state the size of the
equipment with its code number, the part number
(see Appendix) and the quantity required.
4.3 Dismantling / reassembling
During the maintenance period, ensure that the
mechanism to be braked by the equipment is at
rest and that there is no risk of accidental start-
up. Also ensure that the hydraulic supply is shut
off.