99903514:TELESCOPIC CRANE:
2-13 SECTION 2: MAINTENANCE
2-7: PERIODIC VEHICLE INSPECTION
Maintaining the carrier vehicle in safe operating
condition is essential for safety. The vehicle
shuld be inspected in accordance with the
vehicle manufacturer’s recommendations.
Consult the documentation which accompanied
your vehicle.
2-8: PERIODIC CRANE INSPECTION
The Crane Inspection Checklist, included in the
Reference Section (6), is designed to assist you
in maintaining the crane in safe operating
condition. Become familiar with the checklist
prior to operating the crane, and inspect to the
instructions shown on the checklist.
ANSI/ASME B30.5A required that written, dated,
and signed inspection reports and records must
be maintained monthly on critical items includ-
ing the brakes, crane hooks, wire rope, hydrau-
lic cylinders, and hydraulic pressure relief
valves.
NOTE
A CRANE LOG BOOK,PART NO.
99900686, IS AVAILABLE FROM IMT. THE
CRANE LOG PROVIDES A CONVENIENT
AND PRECISE INSPECTION RECORDING
METHOD.
2-9: ADDITIONAL INSPECTIONS
Every three months, and more frequently when
the equipment is subject to heavy useage,
perform the following inspections in addition to
those specified in the Crane Inspection Check-
list in the Reference Section.
LOWER AND EXTENSION BOOMS
1. Check structural defects evidenced in weld
cracks, dents or bends.
2. Check slide pads for wear.
3. Check lower and extension cylinder pins for
proper installation. Check hinge pin bushings
for excessive wear.
BOOM & MAST ASSEMBLY
1. Check control valvebank and all other fittings
for oil leaks and tightness.
2. Check all bolts and retainer plates on pin
assemblies for proper installation.
3. Check torque on all unit mounting bolts.
See Figure B-14 for mounting bolt torques on
each crane model.
4. Check for loose bolts, fatique cracks or
corroded structural members.
BASE ASSEMBLY
1. Check base casting housing for cracks.
2. Check for proper rotation function by making
several start-stop operations. Maximum allow-
able free-play at mast front should be 1/8" to 3/
16".
3. Check for proper gear mesh in turntable
gear-bearing. Check motor and gearmounting
bolts for tightness.
HYDRAULIC SYSTEM
1. CYLINDERS
A. Check rods for damage such as scar-
ring, nicks, dents and rust on out-of-service
units.
B. Check for leaks at weld joints and rod
seals. Check for drift indicating leakage
around piston rings or defective holding
valves.
C. Check cylinder case for dents.
Figure B-15: Mounting Bolt Torques
MODEL MOUNTING BOLT TORQUE
1015 200 FT-LB
2020 200 FT-LB
3020 680 FT-LB
3820 680 FT-LB
5020 680 FT-LB
5525 680 FT-LB
6020 680 FT-LB
6025 680 FT-LB
6625 680 FT-LB
7020 200 FT-LB
7025 200 FT-LB
20030115
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