Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 8-3
2250 SERVICE/MAINTENANCE MANUAL UNDER CARRIAGE
8
Tread Slack Adjustment
Adjustment Guideline
Check 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 all tread slack is
in top of treads at tumbler end of crawlers.
2. Place straight edge on tread as shown in Figure 8-2
.
Gap between straight edge and top of tread at lowest
point should be between 1 in (25 mm) tight limit and 2.5
in (63 mm) loose limit.
3. Adjust tread slack if gap is less than tight limit or greater
than loose limit.
4. Adjust treads tighter when operating on firm ground and
looser when operating on soft ground (mud or sand).
Adjustment Procedure
Adjust tread slack at front roller end of each crawler
(Figure 8-3
).
1. Thoroughly clean crawler to be adjusted.
2. Loosen two bolts (1) at front-roller end of the crawler (1
bolt, each side).
3. Remove cover (2) from both sides of crawler frame.
4. Place jack cylinder (3) on support (4).
5. Jack against rod (5) an equal amount on both sides of
crawler frame.
6. Add or remove an equal thickness of shims (6) on both
sides of crawler frame.
7. Remove jack cylinder (3).
8. Travel crane forward to tighten shims.
9. Check that dimension from center punch (A) in shaft to
center punch line (B) in crawler frame is same on both
sides of crawler to within 1/8 in (3 mm).
10. Check for proper adjustment (see Adjustment Guideline)
and readjust as required (steps 4 through 9).
11. Tighten nuts on bolts at front roller to 1,000 ft-lb (1 356
N•m) lubricated with Never-Seez or an equivalent oil and
graphite mixture.
12. Install cover (2) on both sides of crawler frame.
NOTE: The extreme limit of tread adjustment is when the
bolts are tight against the front end of the slots in
the crawler frame. One crawler tread can be
removed when this limit is reached.
CAUTION
Pin Damage!
Do not adjust treads too tightly or the tread pins will wear
rapidly and may break. Dirt build-up will tighten treads
even more, increasing possibility of damage.
More torque is required to drive tight treads, which results
in faster wear and more fuel consumption.
CAUTION
Excessive Part Wear!
Front roller and tumbler must be square with crawler
frame to within 1/8 in (3 mm), otherwise, parts will wear
rapidly.
FIGURE 8-3
A1052
Item Description
1Bolt
2Cover
3 Jack Cylinder
4 Support
5Rod
6
Shims —
0.134 in (3 mm) and
0.250 in (6 mm) Thick
7Tread
8 Front Roller
9 Center Punch Line B
10 Center Punch A
11 Hand Pump
5
1
6
7
8
9
2
3
4
11
10

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English