Manitowoc 2250 Service Maintenance Manual

Reference Only
UNDERCARRIAGE 2250 SERVICE/MAINTENANCE MANUAL
8-2
Published 07-19-16, Control # 249-01
When new bolts are installed, tighten the bolts in two steps,
as follows.
1. Tighten all bolts to 814 Nm (600 lb-ft).
2. Tighten all bolts to 2 848 Nm (2,100 lb-ft).
Torque Intervals
Tighten all bolts to the specified torque value at the following
intervals:
• After the first 50 hours of operation
• Yearly or every 2,000 hours of operation (whichever
comes first
Replacing the Turntable Bearing Bolts
If, at the yearly inspection interval, one or more bolts are
found to be tightened to less than 2 278 Nm (1,680 lb-ft),
replace the loose bolt(s). 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 tightened to less than 2 278 Nm
(1,680 lb-ft), 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.
CRAWLER ADJUSTMENT
Maintenance
Crawler wear cannot be eliminated, but the rate of wear can
be reduced through regular preventive maintenance, as
follows:
• Lubricate the crawlers as instructed in Lubrication
Section 9.
• Keep the crawlers clean and avoid dirt buildup when
cutting.
• Keep all mounting bolts tight (see the parts manual for
applicable torque values).
• Keep the treads properly adjusted.
• Inspect the crawler gear cases, crawler frames, rollers,
treads, and drive shafts on a regular basis.
Look for oil leaks, excessive wear, cracks, and other
damage. Broken or cracked parts can indicate that the
treads are adjusted too tight.
Repair or replace any damaged parts immediately to
prevent further damage.
Adjusting the Tread Slack
Crawler Adjustment Guideline
See Figure 8-2 for the following procedure.
Check for tread slack at the tumbler end of each crawler.
Maintain equal tread slack at both crawlers.
1. Travel forward on a firm, level surface so that all of the
tread slack is in the top of the treads at the tumbler end
of the crawlers.
2. Place a straightedge on the treads as shown. The gap
between the straightedge and the top of the tread at the
lowest point should be as follows:
- Tight limit—25 mm (1 in)
- Loose limit—63 mm (2.5 in)
3. Adjust the tread slack if the gap is less than the tight limit
or greater than the loose limit.
4. Adjust the treads tighter when operating on firm ground
or looser when operating on soft ground (mud or sand).
CAUTION
Equipment Damage!
More torque is required to drive tight treads, which results
in faster wear, possible pin breakage, and more fuel
consumption. Dirt buildup will tighten the treads even
more, increasing the possibility of damage.
Adjust the treads exactly as specified.
FIGURE 8-2
Straightedge
Crawler
Tumbler
Gap
25 mm (1 in) Tight Limit
63 mm (.25 in) Loose Limit
A1052

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English