Barko 830B, Service Manual

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65-22 ®
SERVICE- HYDRAULIC BRAKE
(continued...)
6.
1.
2.
3.
5.
4.
4. ASSEMBLY
Worn and damaged o·rings must be replaced prior to assembly.
Assemble piston into power plate using a shop press. Take care not to damage the o-rings. Visually align the
center of the cutouts in the piston with the torque pin holes in the power plate.
Caution: The depth the piston is installed into the power Plate is critical. The surface or the piston at the
cutouts must be flush to 0.120in (3.05 mm) below the surface of the power plate or piston will cock
resulting in a complete loss of braking.
Use the reverse of the disassembly procedure with the following notes and additions:
Cylinder of the power plate, piston, and 0-rings must be pre-lubed with system hydraulic fluid prior to
assembly.
Piston Assembly:
After the brake is assembled, install the shaft seals with caution not to cut the seal lips on the shaft splines.
The seal is installed with twin lips facing outwards, away from the brake. The single lip will face inwards.
Brake Assembly:
Using a shop press, install one cone on the shaft. Bearing must be seated tight against the stop. Press only
on the inner race or the bearing cone, not on the rollers. Install the stationary and rotating discs on the shaft.
Note the order of the discs in relationship to the ends or the shaft. Press the other cone onto the shaft
observing the preceding cautions. Use shims to achieve 0.002-0.012in (0.051-0.305 mm) end play. Place
shims behind the power plate bearing. See cutaway view
(Fig-2)
for proper bearing orientation.
Install parts in reverse order of disassembly leaving the shaft seals until last. Release the brake with 300 psi
(21 bar) and measure the torque to rotate the shaft. The free rolling torque of the brake shaft is an indication
of bearing seating and fit. The rolling torque must be 20 in-lb (2.3 Nm) maximum. If it does not meet
specification, check that the bearings are well seated.
Lip Seal Assembly:
Bearing Assembly:
NOTICE
There may be more parts in a Service Kit than your brake requires. Check
the parts list carefully for the exact quantity. Space the springs as shown on the
spring orientation view.
BEARING KIT: includes seals, retaining rings, shims, and bearings.
STACK KIT: includes torque pins, primary, stationary, rotating discs &
compression springs.
0-RING KIT:
Includes o-rings and internal gasket.
See your BARKO Parts Manual or BARKO Service for replacement part
availability.
06/05/2019
Updated
SERVICE