Warner Electric Wheel-Brakes (Std) - Manual (Page 22)

22 Warner Electric • 800-825-9050 819-0514
Figure 3-19
Removing Leads from Ceramic Block
Replace with new lead and bend steel clip to clamp
lead to magnet. Cover connection with Glyptal or other
suitable sealer.
On magnets having a ceramic terminal block for
magnet lead connections, minor repairs to the terminal
block may be made by using a suitable ceramic filler. If
the ceramic block is damaged extensively, use a hack
saw, and cut through the steel clip holding the block in
place. Remove screws, and other attaching parts
holding magnet leads in place and straighten magnet
coil leads. Use extreme caution and bend steel clip up
(Figure 3-19) and slightly to the rear to permit removal
of remainder of terminal block. Clean magnet coil leads
and all contact surfaces of screw, and other attaching
parts, before inserting new terminal block. Bend steel
clip back in place to clamp terminal block to magnet,
and re-assemble magnet leads (Figure 3-20). If steel
clip is damaged during repair, it may be replaced by
welding new clip in place if extreme care is used to
prevent damage to magnet coil and coil insulation from
over-heating. Do not allow weld splatter to get on
magnet poles. Test magnet for short or ground after
any attempt at welding.
Figure 3-20
Installing Leads in Ceramic Block
While wheel is removed, blow out brake assembly with
air hose, making certain that all wheel bearings and
bearing surfaces are protected. Check the magnet and
brake cams for movement; removing and cleaning
thoroughly if necessary. Check magnet and band return
springs for damage or loss of tension. Springs will lose
tension after considerable use due to heat; therefore, it
is recommended that at each reline all springs be
replaced. Never use diagonal cutters to remove or
replace springs.
Before replacing the wheel, always check the armature
depression. Follow the procedure outlined in the brake
installation section beginning with Figure 2-12. While
checking depression, check to make certain armature
face is parallel with the armature mounting ring. To do
so, measure the highest extended height of the
armature face at each armature stop. Pry up armature
stops, which are low if necessary.
Clean all grease and oil from the brake drum surface,
armature face, magnet facing and poles, and brake
lining with carbon tetrachloride. Pack wheel bearings
with a good grade of bearing grease and mount wheel
and drum assembly on axle. Draw up wheel bearing
lock nut tight enough to avoid loose wheel bearings.
Steel Clip
Ceramic
Terminal
Block