Manitowoc Grove GRT9165, Руководство по обслуживанию

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6-13
Published 10-01-2020 Control # 699-00
GRT9165 SERVICE MANUAL SWING SYSTEM
6
GROVE
NOTE: If a new bearing is being installed, a new pinion
gear must also be used. Align the high point
(maximum eccentricity) on the bearing with the
new pinion gear high point.
5. Install a swing gearbox and brake assembly. Align the
gearbox pinions with the swing bearing. Align the swing
gearbox pinion with the high point (maximum
eccentricity) on the turntable bearing. Using a 0.203 mm
(0.008 in) thick shim, check backlash (Figure 6-5). If the
pinion must be moved to achieve proper backlash,
contact your local distributor. For more information about
installing swing gearbox and brake assembly, see
Swing
Gearbox And Brake , page 6-4.
6. Repeat step 5. to install and measure the second swing
gearbox and brake assembly.
7. Position retainer plate on bottom of hydraulic swivel
spool. Engage lugs on carrier frame and secure to spool
with two bolt retainers and four bolts after applying
Loctite® #271 to bolt threads. Torque bolts to 270 N-m
(199 lb-ft). Bend all retainer tabs to make contact with
bolt heads.
8. Plug swivel wiring harness connectors in carrier
receptacles. Secure ground wire to ground stud using a
washer, lockwasher, and nut.
9. Install clamp securing swivel wiring harness to retainer
plate on bottom of hydraulic swivel.
10. Connect all water and hydraulic lines to ports on bottom
of swivel as tagged during removal.
11. Install boom and lift cylinder following procedures
outlined in Section 4 -
Boom , page 4-1.
12. Reconnect batteries.
13. Check slew potentiometer in the for proper orientation.
Refer to
Swivels , page 6-13.
Testing
Activate crane and check for proper function.
NOTE: If superstructure does not turn freely after bearing
and pinion replacement, contact your local
distributor.
SWIVELS
Description
The swivel assembly consists of a 12 port hydraulic swivel
(Figure 6-6), a 2 port water swivel, and a 20 conductor slip
ring electrical swivel. Solid connections cannot be used to
transfer oil, heater hot water and electricity between the
carrier and superstructure due to the continuous 360 degree
swing. Use of swivels efficiently accomplishes this function.
The barrel portion of the hydraulic swivel is attached to the
turntable base plate by four bolts, washers, and bushings
which connect to mounting lugs on the case.
The spool portion of the swivel rides on a thrust ring at the
top of the swivel case. The spool portion is held stationary to
the carrier by bolts and bolt retainer plates attached to the
swivel retainer plate. This engages the carrier frame lugs
with bolts and jam nuts and allows the spool to remain
stationary with the carrier as the case rotates with the
superstructure.
The spool portion of the water swivel is attached to the spool
of the hydraulic swivel by four bolts. The hydraulic and water
swivel spools remain stationary with the carrier as the
superstructure rotates. The water swivel case contains a lug
which is keyed to a corresponding lug on the hydraulic swivel
c a se , ca u s i ng t he w at e r s w i v el t o r otat e w i th th e
superstructure.
The electrical swivel center or collector ring assembly is
secured by setscrews to a center post which is bolted to the
spool of the hydraulic swivel. This allows the collector ring
assembly to remain stationary with the carrier. The outer
portion or brush assembly is mounted on two studs which
are located on the mounting plate assembly retained to the
water swivel barrel by a bolt. This allows the brush assembly
to rotate with the superstructure around the stationary
collector core.
FIGURE 6-5
. 008 Thick
Shim By Full
Width To
Tooth
Engagement
(.016
Backlash)
Pinion
Max
Eccen-
tricity
Point