9
10
SINGLE & DOUBLE GIRDER TOP-RUNNING BRIDGES
WITH INDIVIDUAL MOTOR DRIVEN
END TRUCKS
P/N: 11532620 REV. AA
September 2018
GEARMOTOR (Endtruck)
The gearcase lubricant should be changed after 10,000 hours of
use, based on moderate (Class C) service. Lubrication frequency
will need to be increased dependant on the severity of service.
Oil required is Aral Degol BG 220 gear oil (suitable substitutes are
Texaco Pinnacle 220 & Shell Omala 220). Do not mix lubricant types
(this applies in particular to mineral and synthetic lubricants). Too
much lubricant can lead to overheating. Gearcase is not provided
with, nor requires a vent plug.
To change gearcase oil:
1. Disconnect and lock out power supply.
2. Unplug motor connection.
3. Unbolt complete gearmotor from endtruck. Gearmotors weigh up
to approximately 170 lbs.
4. Remove drain/filler plug on top of gearcase as shown in figure 5.
Tip motor to drain oil in to proper container. Properly dispose of
used oil.
5. Fill gearcase with correct amount of oil per chart above and
replace drain/filler plug.
6. Mount complete gearmotor back on endtruck and bolt back into
place.Using a torque wrench, tighten all bolts to 7.5 ft. lbs. torque
for 115 mm (4.5") and 160 mm (6.3") end trucks, 18 ft. lbs. torque
for 200 mm (7.9") and 260 mm (10.2") end trucks and 62 ft. lbs.
torque for 305 mm (12.01") end trucks.
7. Re-install motor plug
8. Turn power back on to crane and test run, checking for any signs
of leaks.
Figure 5. Gearcase Drain/Filler Plug
HOIST & TROLLEY
For hoist and trolley lubrication instructions refer to the
manufacturer’s manuals
WHEEL AND BEARING REMOVAL & REPLACEMENT
Refer to parts illustration Figure 7.
To remove the wheels follow the steps below:
1. Remove load and below the hook devices from hook. Move hoist
and trolley to opposite end of crane from end work is being done.
MAINTENANCE CONTINUED
Motor
Horsepower
KW
Gearcase Oil Capacity
(Liters)
0.75
.55
.18
1.0
.75
.18
1.5
1.2
.40
2.0
1.5
.55
3.0
2.2
.55
5.0
3.7
1.2
WARNING
Make sure that truck is adequately supported so that it
cannot drop when wheel is removed. Due to the weight of
the wheels and bearing cages, make sure that the proper
equipment is in place to safely remove the wheels and
bearing cages from the end truck. Also lock main runway
disconnect switch in the open position (off) when working
on wheels adjacent to runway conductors.
2.
Disconnect power and lock out.
NOTICE
MAKE SURE ALL JACKING OR LIFTING OF END TRUCK
FOR WHEEL REMOVAL IS DONE NEAR THE BRIDGE
GIRDER(S) OR SIMULTANEOUSLY AT EACH END OF THE
TRUCK BETWEEN THE WHEEL AND THE GIRDER(S).
JACKING OR LIFTING ONLY ONE END OF THE TRUCK
MAY PERMANENTLY DAMAGE THE CRANE.
3. Remove load from wheel axle. This can be accomplished by
jacking or lifting at the girder(s). Jacking or lifting only one end of
the truck may permanently damage the crane.
4. If working on driver wheel, unplug motor leads from gearmotor
and remove gearmotor from bearing cage. Remove rail sweep
from endtruck and bolts from bearing cages.
5. Jack endtruck to height that will allow bearing cage to roll out
from end of endtruck.
6. Roll wheel, bearings and bearing caps assembly from under
endtruck and remove from runway. Be careful not to drop bearing
caps, bearings and wheel from runway height.
7. Remove bearing caps, bearings should stay on wheel axle.
8. Remove bearings from axle. Depending on the condition of the
bearings and axles, a bearing puller may be required. Be careful
not to damage bearing fits on axle.
9. Inspect axle bearing diameter and wheel tread diameter and
flange for excessive wear, spalling and work hardening on the
tread and flange, nicks and gouges on bearing diameters, etc.
Replace wheel if necessary.
10. Prior to re-assembling bearings to axle, pack the roller bearings
with grease. Use NLGI #2 general purpose grease unless the
severity of the duty cycle and/or operating environment warrants
otherwise. Press bearings onto wheel axle, ensure they are fully
seated.
11. Assemble both bearing caps onto bearings
12. Place wheel assembly onto runway rail and roll it into place in the
endtruck. Orient the grease fitting (if provided) on bearing cap,
pointing towards the rail sweep.
13.
Carefully lower endtruck, ensuring bearing caps and the
endtruck pilot diameters align properly. Install and tighten
bearing cap bolts. Using a torque wrench, tighten all bolts to
36 ft. lbs. torque for 115 mm (4.5"), 160 mm (6.3") and 200 mm
(7.9") end trucks, 72 ft. lbs. torque for 260 mm (10.2") and 305
mm (12.01") end trucks.
14.
Lower endtruck onto runway rail.
15.
Re-install rail sweep and gearmotor. Connect motor power plug.
Refer to page 10 for torque specifications.
16. Turn power back on to crane and inspect crane for proper
operation.
BRIDGE MOTOR BRAKES
Motor brakes are DC rectified solenoid activated, spring set disc
type brakes. Brake is intended to be used strictly as a holding brake
and does NOT have any torque adjustment for decelerating and
stopping the crane. Deceleration and stopping is to be provided by
the variable frequency (inverter) motor control.
CMK_12322 Yale Rotating Axle End Truck Parts 11532619-REV AD_mec.indd 10
10/16/18 2:07 PM
