Manitowoc MLC150-1, Service Maintenance Manual

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UNDERCARRIAGE MLC150-1 SERVICE/MAINTENANCE MANUAL
8-6
Published 03-21-2021, Control # 264-01
CRAWLER PREVENTIVE MAINTENANCE
See Figure 8-3 .
Weekly or Every 40 Hours of Engine Operation
• Lubricate the crawlers as instructed in the Lubrication
Guide supplied with the crane.
• Keep the crawlers clean and avoid dirt buildup when
cutting.
• Check that all mounting bolts are tight. See Intermediate
Roller Bolt Torque on page 8-7 .
• Check for proper tread slack.
• Check for oil leaks, excessive wear, cracks, and other
damage. Broken or cracked parts can indicate that the
treads are adjusted too tightly.
• Repair or replace damaged parts immediately to prevent
further damage.
CRAWLER TREAD SLACK MEASUREMENT
See Figure 8-3 .
Weekly or Every 40 Hours of Engine Operation
Check tread slack (14) at the drive tumbler (1) end of each
crawler. Maintain equal tread slack at both crawlers.
1. Travel forward or reverse on a firm level surface until all
tread slack is in the top treads at the drive tumbler end of
the crawlers.
2. Place a straightedge (13) on top of the treads (3).
The
straightedge must span from the top of the rear
guide bars (12) to the top of the drive tumbler (1)
.
3. Measure the tread slack between the straightedge and
the top of the tread at the lowest point:
• Tight limit gap—19 mm (0.75 in)
• Loose limit gap—51 mm (2.0 in)
FIGURE 8-3
Quantities are for Each Crawler
Item Description Item Description
1 Drive Tumbler 9 Cover (shown removed) (qty 2)
2 Gearbox 10A Shim: 10 mm (0.39 in) (qty 1 each side)
3 Tread 10B Shim: 6.4 mm (0.25 in) thick (qty as required)
10C Shim: 3.4 mm (0.134 in) thick (qty as required)
4 Intermediate Roller (qty 11) 11 Adjusting Rod
5 Hand Pump 12 Guide Bars
6 Cylinder 13 Straightedge
7 Front Roller 14 Tread Slack:
8 Nut and Bolt (qty 2) • 19 mm (0.75 in) — Tight Limit
• 51 mm (2.0 in) — Loose Limit
REFERENCE
ONLY