Manitowoc Published 09-10-14, Control # 065-24 8-5
14000 SERVICE MANUAL UNDER CARRIAGE
CRAWLER ADJUSTMENT
See Figure 8-2 for the following procedures.
Maintenance
Crawler wear cannot be eliminated, but the rate of wear can
be reduced through regular preventive maintenance, as
follows:
• Lubricate crawlers as instructed in Lubrication Folio
2129.
• Keep crawlers clean and avoid dirt build-up when
cutting.
• Keep all mounting bolts tight (see Parts Manual for
applicable torque values).
• Keep treads properly adjusted.
• Inspect crawler gear cases, crawler frames, rollers, and
treads on a regular basis.
Look for oil leaks, excessive wear, cracks, and other
damage. Broken or cracked parts can indicate that
treads are adjusted too tight.
• Repair or replace damaged parts immediately to prevent
further damage.
Tread Slack Adjustment
Adjustment Guideline
Check tread slack at tumbler end of each crawler. Maintain
equal tread slack at both crawlers.
1. Travel forward or reverse 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 1 in (25 mm) tight limit to 2-1/2 in (64
mm) loose limit.
3. Adjust tread slack if gap exceeds either 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 roller end of each crawler.
1. Thoroughly clean crawler to be adjusted.
2. Loosen bolt on each side of crawler roller.
3. Remove covers from both sides of crawler frame.
4. Place jacking cylinder on support.
5. Jack against rod an equal amount on both sides of
crawler frame.
6. Add or remove an equal thickness of shims on both
sides of crawler frame.
7. Remove jacking cylinder.
8. Travel the crane forward or reverse to tighten shims.
9. Check that dimension from center punch in shaft to
center punch line in crawler frame is same on both sides
of crawler to within 1/8 in (3,0 mm).
10. Check for proper adjustment (see Adjustment Guideline)
and readjust as required (steps 4 through 9).
11. Tighten nuts on bolts at crawler roller to 1,000 ft-lb (1 356
Nm) lubricated with Never-Seez or an equivalent oil and
graphite mixture.
12. Install cover on both sides of crawler frame.
NOTE: Extreme limit of tread adjustment occurs when
bolts are tight against front end of the slots in
crawler frame. One crawler tread can be removed
when this limit is reached.
CAUTION
Pin Damage!
Do not adjust treads too tight; 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
Parts Wear!
Crawler roller and tumbler must be square with crawler
frame within 1/8 in. (3,0 mm); or parts will wear rapidly.
To Next Page
Loading...
Need help?
General
