Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 8-1
2250 SERVICE/MAINTENANCE MANUAL UNDER CARRIAGE
8
SECTION 8
UNDER CARRIAGE
TURNTABLE BEARING BOLT TORQUE
Bearing Installation
The outer ring of the turntable bearing must be properly
mounted to allow the rotating bed to be parked in line with
the crawlers or the carrier when the swing lock is engaged
(this does not apply to a turret mounted crane).
The gear tooth valley marked XX in the outer ring must be
mounted on the longitudinal centerline at the front or rear of
the carbody or carrier as shown in Figure 8-1
.
Four dowel pins are installed in the inner ring as shown in
Figure 8-1
, View A. Use the pins to align the adapter frame
with the inner ring.
Torque Requirements
Lubrication
Before installing the turntable bearing bolts, lubricate the
threads of each bolt with Never-Seez (MCC 361010) or an
equivalent antiseizing lubricant.
Torque Values
Torque each turntable bearing bolt to 2,100 ft-lbs (2 848
N•m).
When new bolts are installed, torque the bolts in two steps:
first to 600 ft-lbs (814 N•m) and then to 2,100 ft-lbs (2 848
N•m).
Torque Sequence
Torque the bolts in the numbered sequence given in
Figure 8-1
.
Torque Intervals
INITIAL OPERATION: torque all bolts to the specified value
after the first 50 hours of operation.
YEARLY OR EVERY 2,000 HOURS OF OPERATION
(whichever comes first): torque all bolts to the specified
value.
Bolt Replacement
If at the yearly inspection interval one or more bolts are found
to be torqued to less than 1,680 ft-lbs (2 278 N•m), replace
each loose bolt. Also replace the bolts and washers on each
side of each loose bolt.
If, at the yearly inspection interval, twelve or more bolts for
either ring are found to be torqued to less than 1,680 ft-lbs (2
278 N•m), replace all of the bolts and washers for the
corresponding ring.
Replace all of the bolts and washers each time a new
turntable bearing is installed.
WARNING
Turntable Bearing Failure!
Loose or improperly torqued bolts can cause bolts or
turntable bearing to fail, possibly allowing rotating bed to
break away from carbody, carrier, or turret.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English