Manitowoc Grove GRT880 Service Manual

6-19
Published 10/19/2017, Control # 618-00
GRT880 SERVICE MANUAL SWING SYSTEM
6
GROVE
TWO PORT WATER SWIVEL
Description
The two port water swivel allows engine coolant to flow from
the carrier-mounted engine to the hot water heater in the
operator’s cab. Coolant is transferred to a circumferential
groove on the water spool exterior through an internally
drilled passage in the 12 port hydraulic swivel spool. This
groove corresponds with a mating port on the outer case of
the water swivel. Spool grooves are separated by a quad
ring/telflon bronze ring seal. The lip seal prevents coolant
from leaking externally. Return engine coolant flow from the
hot water heater is accomplished in the same manner
through the opposite port of the water swivel.
Maintenance
Removal
1. Perform steps 1 thru 4 of Hydraulic Swivel - Removal in
this section.
2. Remove electrical swivel. Refer to Electrical Swivel -
Removal in this section.
3. Tag and disconnect lines from the case of the water
swivel. Cap or plug all lines and openings.
4. Remove screw and shim(s) from water/hydraulic swivel
keying lugs.
5. Remove four capscrews and washers securing water
swivel and electrical swivel center post to hydraulic
swivel. Remove water swivel and center post.
Disassembly
NOTE: Any maintenance requiring disassembly of the
water swivel should include replacement of all
seals and rings.
1. Withdraw the spool from the case.
2. Place spool on a clean work surface in a dust-free area.
Block spool to prevent movement during disassembly.
NOTE: Aligning discarded seals and rings in order of
disassembly will assist with installation of new
seals and rings.
3. Remove seals and rings from spool.
Cleaning and Inspection
1. Clean spool and case with a suitable solution and dry
with compressed air. Plug all ports with plastic caps.
2. Check spool and inside of case for scratches, grooves,
scoring, etc. If any grooves have developed with a depth
of 0.127 mm (0.005 in) the unit should be replaced.
Assembly
NOTE: Lubricate interior of swivel to prevent rusting from
condensation.
1. Lubricate spool, seals, and rings.
2. Install new seals and rings on spool.
3. Insert spool in barrel.
Installation
1. Install water swivel on top of hydraulic swivel. Align
keyed lug on water swivel with lug on hydraulic swivel.
Secure water swivel and electrical swivel center post
with four capscrews and washers.
2. Install shim(s) on keying lug to provide a snug fit. Secure
with screw.
3. Connect lines to swivel case as tagged during removal.
4. Install electrical swivel. Refer to Electrical Swivel -
Installation in this Section.
5. Perform steps 8 and 9 of Hydraulic Swivel - Installation
in this Section.
6. Activate all systems and cycle all functions. Check for
proper operation and leaks.
CAUTION
When removing seals and rings, avoid scratching
grooved and gland surfaces. Damage to spool may result
in unexpected operation.
WARNING
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. Always use
approved safety equipment; gloves, face masks, and eye
wear. Failure to comply can result in injury or death to
personnel.
CAUTION
When installing seals and rings, avoid stretching seals or
scratching grooved and gland surfaces. Damage to the
spool assembly may result in unexpected operation.
Proper alignment when installing the case is required. Do
not force the spool into the case. Damage to the seals
may result.
Reference Only

Manitowoc Grove GRT880 Specifications

General

Brand	Manitowoc
Model	Grove GRT880
Category	Construction Equipment
Language	English