SWING SYSTEM RT880E SERVICE MANUAL
6-16 Published 11-10-2014, Control # 524-00
4. Remove the four bolts and washers securing the water
swivel and electrical swivel center post to the hydraulic
swivel. Remove the water swivel case and center post.
Disassembly
NOTE: Any maintenance requiring disassembly of the
water swivel should include replacement of all
seals and rings.
NOTE: Aligning discarded seals and rings in the order of
disassembly will assist with installation of new
seals and rings.
1. Remove the seals and rings from the spool.
Cleaning and Inspection
1. Clean the spool and case with a suitable solution and
dry with compressed air. Plug all ports with plastic caps.
2. Check the spool and inside of the case for scratches,
grooves, scoring, etc. If any grooves have developed
with a depth of 0.005 in (0.127 mm) the unit should be
replaced.
Assembly
NOTE: Lubricate the interior of the swivel to prevent rust-
ing from condensation.
1. Lubricate the spool, seals, and rings.
2. Install new seals and rings on the spool.
3. Insert the spool into the barrel.
Installation
1. Install the water swivel on top of the hydraulic swivel.
Secure the water swivel and the electrical swivel center
post with the capscrews and washers.
2. Connect the lines to the swivel case as tagged during
removal.
3. Install the electrical swivel. Refer to the installation pro-
cedure under Electrical Swivel, page 6-16.
4. Perform steps 8 and 9 of the installation procedure
under Hydraulic Swivel, page 6-14.
5. Activate all systems, cycle all functions, and observe for
proper operation and any leakage.
Electrical Swivel
Description
The swivel assembly consists of a 20 conductor slip ring and
cover assembly.
Each brush set incorporates two brushes, leads, and clips
which are attached to a brush holder assembly. The brush
set leads are formed into harnesses which are routed
through the mounting plate on the swivel. The collector ring
leads are formed into one harness which is routed downward
through the center of the hydraulic swivel. Extending from
the base of the hydraulic swivel, the collector ring leads are
also formed into connectors which plug into receptacles from
the chassis power supply.
The swivel cover is secured with a seal and bolts
The electrical swivel also incorporates a slew potentiometer.
The potentiometer controls functions in the rated capacity
limiter, working area definition, and rear axle oscillation
lockout systems.
Theory of Operation
The electrical swivel is located on top of the water swivel and
transfers electricity between the carrier and superstructure.
Wiring harnesses transmit the electricity between the carrier
and superstructure.
Maintenance
Removal
1. Perform steps 1 through 4 of the removal procedure
under Hydraulic Swivel, page 6-14.
CAUTION
When removing seals and rings, avoid scratching
grooved and gland surfaces.
DANGER
Cleaning solvents can be toxic, flammable, an irritant to
the skin, or give off harmful fumes. Avoid prolonged skin
contact, inhalation of vapors, or smoking. Failure to
comply can result in injury or death to personnel.
CAUTION
When installing seals and rings, avoid stretching seals or
scratching grooved or gland surfaces.
CAUTION
Proper alignment when installing the case is required. Do
not force the spool into the case.
WARNING
Disconnect the batteries before performing any
maintenance on the electrical system. Serious burns may
result from accidental shorting or grounding of live
circuits.
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